Data Binding

15 Jan 202424 minutes to read

Appointment Fields

The below listed names are the appointment fields which holds the appropriate column names from the dataSource.

Field name	Description
Id	Binds the Id field name for indexing and performing CRUD operation on the appointments. It’s optional.
StartTime	Binds the appointment start time field name which is mandatory and also its related validation rules.
StartTimeZone	Binds the name of the start timezone field in the dataSource and also its related validation rules. If the StartTimeZone field is not mentioned, then the appointment makes use of the Scheduler timeZone or System timeZone.
EndTime	Binds the appointment end time field name which is mandatory and also its related validation rules.
EndTimeZone	Binds the name of the end timezone field in the dataSource and also its related validation rules. If the EndTimeZone field is not mentioned, then the appointment makes use of the Scheduler timeZone or System timeZone.
Subject	Binds the appointment subject field name which holds the summary of the appointment and also its related validation rules.
Location	Binds the name of the location field and also its related validation rules. It indicates the appointment location/occurrence place. This field needs to be bind to the Scheduler, when an API ShowLocationField is set to true.
Description	Binds the appointment description field name and also its related validation rules.
AllDay	Binds the name of the AllDay field. It accepts the boolean value and indicates whether the appointment is an all-day appointment or not.
Categorize	Binds the name of the categorize field and also its related validation rules. It indicates the category or status value (red categorize, green, yellow and so on).
Priority	Binds the name of the priority field and its related validation rules, which indicates the priority (high, low, medium and none) of the appointments. This field should be bind to the Scheduler, when PrioritySettings.Enable is set to true.
ResourceFields	Binds one or more fields in the resource collection. It maps the resource field names with the appointments, denoting to which resource the appointments actually belongs.
Recurrence	Binds the name of the recurrence field. It accepts the boolean value and indicates whether the appointment is a recurrence appointment or not.
RecurrenceRule	Binds the name of the recurrenceRule field. It holds the recurrence pattern associated with the appointments.
RecurrenceId	Binds the recurrence Id field which acts as a parent id for Scheduler recurrence appointments.
RecurrenceExDate	Binds the recurrence Exception field which accepts the recurrence Exception date values.

The below example depicts the appointment fields accepting the string type mapper fields.

Create a new Class ScheduleData to define the appointment related data to be passed to the Scheduler as mentioned below,

C#

public class ScheduleData 
    {
        public string Id { get; set; }
        public string Subject { get; set; }
        public string Description { get; set; }
        public DateTime StartTime { get; set; }
        public DateTime EndTime { get; set; }
        public string Categorize { get; set; }
        public string RoomId { get; set; }
        public string OwnerId { get; set; }
        public string Priority { get; set; }
        public bool AllDay { get; set; }
        public bool Recurrence { get; set; }
        public string RecurrenceRule { get; set; }
    }

Also, define the below model classes in your application, if there is a need to make use of the features such as multiple resources, categories, priorities, context menu and timezone collection in your sample application.

C#

// Define the below class, whenever the multiple resources and grouping feature is used in your sample project.
public class ResourceFields
    {
        public string Text { set; get; }
        public string Id { set; get; }
        public string GroupId { set; get; }
        public string Color { set; get; }
        public int WorkHourStart { set; get; }
        public int WorkHourEnd { set; get; }
        public List<string> CustomDays { set; get; }
    }
    
// Define the below class, whenever the category related data is to be used in Scheduler.
public class CategorizeSettings
    {
        public string Text { set; get; }
        public string Id { set; get; }
        public string FontColor { set; get; }
        public string Color { set; get; }
    }

// Define the below class, whenever the priorities are to be used for Scheduler appointments.
public class PrioritySettings
    {
        public string Text { set; get; }
        public string Value { set; get; }
    }
    
// Define the below two classes (Appointment and Cells), if context menu items are to be used in the Scheduler.
public class Appointment
    {
        public string Text { set; get; }
        public string Id { set; get; }
    }
public class Cells
    {
        public string Text { set; get; }
        public string Id { set; get; }
        public string ParentId { set; get; }
    }
    
// Define the below class, if timezone collection to be specified for Scheduler.
public class TimezoneCollection
    {
        public string Text { set; get; }
        public string Id { set; get; }
        public string Value { set; get; }
    }

RAZOR

@using MyProject.Models; // Here MyProject defines your project name to access the model class
@{ 
    <!-- Datasource for Appointments -->
    List<ScheduleData> Appoint = new List<ScheduleData>();
    Appoint.Add(new ScheduleData { Id = "1", Subject = "Meeting", StartTime = new DateTime(2015, 11, 10, 10, 00, 00), EndTime = new DateTime(2015, 11, 10, 11, 00, 00), Description = "", AllDay = false, Recurrence = false, RecurrenceRule = "" });
    
    <!-- Datasource for Grouping Resources -->
    List<String> Group = new List<String>();
    Group.Add("Owners");
    
    <!-- Datasource for Resources -->
    List<ResourceFields> Resources = new List<ResourceFields>();
    Resources.Add(new ResourceFields { Id = "1", Text = "Nancy", Color = "#f8a398" });
    Resources.Add(new ResourceFields { Id = "3", Text = "Steven", Color = "#56ca85" });
    Resources.Add(new ResourceFields { Id = "5", Text = "Michael", Color = "#51a0ed" });
}

@(Html.EJ().Schedule("Schedule1")
        .Width("100%")
        .Height("525px")
        .CurrentDate(new DateTime(2015, 11, 5))
        .Group(gr => { gr.Resources(Group); })
        .Resources(res => {
            res.Field("OwnerId").Title("Owner").Name("Owners").AllowMultiple(true).ResourceSettings(fields => fields.Datasource(Resources).Text("Text").Id("Id").Color("Color")).Add();
        })
        .ShowLocationField(true)
        .CategorizeSettings(cat => cat.Enable(true))
        .PrioritySettings(pri => pri.Enable(true))
        .AppointmentSettings(fields => fields.Datasource(Appoint)
            .Id("Id")
            .Subject("Subject")
            .StartTime("StartTime")
            .StartTimeZone("StartTimeZone")
            .EndTime("EndTime")
            .EndTimeZone("EndTimeZone")
            .Description("Description")
            .Location("Location")
            .AllDay("AllDay")
            .Priority("Priority")
            .Categorize("Categorize")
            .Recurrence("Recurrence")
            .RecurrenceRule("RecurrenceRule")
            .RecurrenceId("RecurrenceId")
            .RecurrenceExDate("RecurrenceExDate")
            .ResourceFields("OwnerId"))
)

Appointment Field Validation

It is possible to validate the required fields of the appointment window from client-side before submitting it, by adding appropriate validation rules to each of the fields. The appointment fields have been extended to accept both String and object type values. Therefore, in order to perform validations, it is necessary to specify object values for the appointment fields.

Refer the appointment fields specified with validation rules from the following code example.

RAZOR

@using MyProject.Models; // Here MyProject defines your project name to access the model class
@{
    <!-- Datasource for CategorizeSettings -->
    List<CategorizeSettings> CategorizeValue = new List<CategorizeSettings>();
    CategorizeValue.Add(new CategorizeSettings { Text = "Blue Category", Id = "1", Color = "#43b496", FontColor = "#ffffff" });
    CategorizeValue.Add(new CategorizeSettings { Text = "Green Category", Id = "2", Color = "#7f993e", FontColor = "#ffffff" });
    CategorizeValue.Add(new CategorizeSettings { Text = "Orange Category", Id = "3", Color = "#cc8638", FontColor = "#ffffff" });
    CategorizeValue.Add(new CategorizeSettings { Text = "Purple Category", Id = "4", Color = "#ab54a0", FontColor = "#ffffff" });
    CategorizeValue.Add(new CategorizeSettings { Text = "Red Category", Id = "5", Color = "#dd654e", FontColor = "#ffffff" });
    CategorizeValue.Add(new CategorizeSettings { Text = "Yellow Category", Id = "6", Color = "#d0af2b", FontColor = "#ffffff" });
}

@(Html.EJ().Schedule("Schedule1")
    .Width("100%")
    .Height("525px")
    .CurrentDate(new DateTime(2015, 11, 5))
    .ShowLocationField(true)
    .CategorizeSettings(fields => fields.Datasource(CategorizeValue).Enable(true).AllowMultiple(false).Id("Id").Text("Text").Color("Color").FontColor("FontColor"))
    .AppointmentSettings(fields => fields
        .Id("Id")
        .Subject(subject => subject.Field("Subject").ValidationRules(v => v.AddRule("required", true)))
        .Location(location => location.Field("Location").ValidationRules(v => v.AddRule("required", true).AddRule("customRule", "/^[a-zA-Z0-9- ]*$/")))
        .StartTime("StartTime")
        .EndTime("EndTime")
        .Description(des => des.Field("Description").ValidationRules(v => v.AddRule("required", true).AddRule("minlength", 5).AddRule("maxlength", 500)))
        .AllDay("AllDay")
        .Recurrence("Recurrence")
        .RecurrenceRule("RecurrenceRule")
        .Categorize(categorize => categorize.Field("Categorize").ValidationRules(v => v.AddRule("required", true))))
)

HTML

<script src="@Url.Content("~/Scripts/jquery.validate.min.js")"></script>
<script src="@Url.Content("~/Scripts/jquery.validate.unobtrusive.min.js")"></script>
<script type="text/javascript">
    $(function () {
        $.validator.addMethod("customRule", function (value, element, options) {
            var expression = /^[a-zA-Z0-9- ]*$/;
            return expression.test(value);
        }, "Special character(s) not allowed in Location field");
    });
</script>

Binding to Simple List Data Array

Scheduler supports binding the appointment data to it through the list of appointment object collection as depicted in the below code example.

Example - Array of List Data Binding

RAZOR

@using MyProject.Models; // Here MyProject defines your project name to access the model class
@{
    <!-- Datasource for Appointments -->
    List<ScheduleFields> Appoint = new List<ScheduleFields>();
    Appoint.Add(new ScheduleFields { Id = "1", Subject = "Meeting", StartTime = new DateTime(2015, 11, 10, 10, 00, 00), EndTime = new DateTime(2015, 11, 10, 11, 00, 00), Description = "", AllDay = false, Recurrence = false, RecurrenceRule = "" });
}

@(Html.EJ().Schedule("Schedule1")
        .Width("100%")
        .Height("525px")
        .CurrentDate(new DateTime(2015, 11, 5))
        .AppointmentSettings(fields => fields.Datasource(Appoint)
            .Id("Id")
            .Subject("Subject")
            .StartTime("StartTime")
            .EndTime("EndTime")
            .Description("Description")
            .AllDay("AllDay")
            .Recurrence("Recurrence")
            .RecurrenceRule("RecurrenceRule"))
)

Binding Remote Data Service

The appointment data can be bound to the Scheduler through Odata remote services, by configuring the service URL to the Schedule dataSource API.

RAZOR

@(Html.EJ().Schedule("Schedule1")
        .Width("100%")
        .Height("525px")
        .CurrentDate(new DateTime(2015, 11, 5))
        .AppointmentSettings(fields => fields.Datasource("http://mvc.syncfusion.com/OdataServices/Northwnd.svc/").Query("ej.Query().from('Events').take(10)")
            .Id("Id")
            .Subject("Subject")
            .StartTime("StartTime")
            .EndTime("EndTime")
            .AllDay("AllDay")
            .Recurrence("Recurrence")
            .RecurrenceRule("RecurrenceRule"))
)

OData V4

The OData v4 is an improved version of OData protocols. Scheduler supports retrieving and consuming appointment data from OData v4 services, just similar to the other remote services.

RAZOR

@(Html.EJ().Schedule("Schedule1")
        .Width("100%")
        .Height("525px")
        .CurrentDate(new DateTime(2015, 11, 5))
        .EnableLoadOnDemand(true)
        .AppointmentSettings(fields => fields.Datasource(dataSource => dataSource.URL("http://services.odata.org/V4/Northwind/Northwind.svc/Orders/").Adaptor(AdaptorType.ODataV4Adaptor))
            .Id("Id")
            .Subject("ShipName")
            .StartTime("OrderDate")
            .EndTime("RequiredDate")
            .Description("ShipAddress"))
)

WebAPI Binding

The Schedule appointment data can also be bound through the Web API services. It is a programmatic interface to define the request and response messages system that is mostly exposed in JSON or XML.

RAZOR

@(Html.EJ().Schedule("Schedule1")
        .Width("100%")
        .Height("525px")
        .CurrentDate(new DateTime(2015, 11, 5))
        .AppointmentSettings(fields => fields.Datasource(dataSource => dataSource.URL("http://mvc.syncfusion.com/OdataServices/api/ScheduleData/").CrossDomain(true))
            .Id("Id")
            .Subject("Subject")
            .StartTime("StartTime")
            .EndTime("EndTime")
            .Description("Description")
            .AllDay("AllDay")
            .Recurrence("Recurrence")
            .RecurrenceRule("RecurrenceRule"))
)

The server-side code to retrieve the appointments are as follows.

C#

// To retrieve the appointments from database and bind it to Scheduler
    public IEnumerable<Event> GetData(String CurrentDate, String CurrentView, String CurrentAction)
    {
        return new NORTHWNDEntities().Events.ToList();
    }

Data Binding using OLEDB

The appointment data can also be bound to the Scheduler using OLEDB database as depicted below.

RAZOR

@(Html.EJ().Schedule("Schedule1")
        .Width("100%")
        .Height("525px")
        .CurrentDate(new DateTime(2015, 11, 5))
        .AppointmentSettings(fields => fields.Datasource(dataSource => dataSource.URL("Home/GetData").CrudURL("Home/Batch").Adaptor("UrlAdaptor"))
            .Id("Id")
            .Subject("Subject")
            .StartTime("StartTime")
            .EndTime("EndTime")
            .StartTimeZone("StartTimeZone")
            .EndTimeZone("EndTimeZone")
            .Description("Description")
            .AllDay("AllDay")
            .Recurrence("Recurrence")
            .RecurrenceRule("RecurrenceRule"))
)

The server-side controller code to retrieve and bind the appointment data to Scheduler are as follows. Also, define a class with all the required appointment fields as depicted in the below code example.

C#

// Define a class with all appointment fields
        public class ScheduleData
        {
            public int Id { get; set; }
            public string Subject { get; set; }
            public DateTime StartTime { get; set; }
            public DateTime EndTime { get; set; }
            public Boolean AllDay { get; set; }
            public Boolean Recurrence { get; set; }
            public string RecurrenceRule { get; set; }
            public string StartTimeZone { get; set; }
            public string EndTimeZone { get; set; }
            public string Description { get; set; }
        }

        // To retrieve the appointments from database and bind it to Scheduler
        public JsonResult GetData()
        {
            // Mention your own dataSource to be used here.
            string stringAccessConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|/ScheduleDb.MDB";
            DataSet myDataSet = new DataSet();
            OleDbConnection myAccessConn = new OleDbConnection(stringAccessConn);
            OleDbCommand myAccessCommand = new OleDbCommand("SELECT * FROM DefaultSchedule", myAccessConn);
            OleDbDataAdapter myDataAdapter = new OleDbDataAdapter(myAccessCommand);
            myAccessConn.Open();
            myDataAdapter.Fill(myDataSet, "DefaultSchedule");
            List<ScheduleData> datasource = new List<ScheduleData>();
            datasource = myDataSet.Tables[0].AsEnumerable().Select(dataRow => new ScheduleData { Id = dataRow.Field<int>("Id"), Subject = dataRow.Field<string>("Subject"), StartTime = dataRow.Field<DateTime>("StartTime"), EndTime = dataRow.Field<DateTime>("EndTime"), AllDay = dataRow.Field<bool>("AllDay"), Recurrence = dataRow.Field<bool>("Recurrence"), RecurrenceRule = dataRow.Field<string>("RecurrenceRule"), Description = dataRow.Field<string>("Description"), StartTimeZone = dataRow.Field<string>("StartTimeZone"), EndTimeZone = dataRow.Field<string>("EndTimeZone") }).ToList();
            myAccessConn.Close();
            return Json(datasource, JsonRequestBehavior.AllowGet);
        }

The controller code to handle the CRUD operation are as follows.

C#

public JsonResult Batch(EditParams param)
        {
            // Mention your own dataSource to be used here.
            string stringAccessConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|/ScheduleDb.MDB";
            if (param.action == "insert" || (param.action == "batch" && param.added != null))  // this block of code will execute while inserting the appointments
            {
                var value = param.action == "insert" ? param.value : param.added[0];
                using (OleDbConnection myCon = new OleDbConnection(stringAccessConn))
                {
                    OleDbCommand cmd = new OleDbCommand();
                    cmd.CommandType = CommandType.Text;
                    cmd.CommandText = "INSERT INTO DefaultSchedule(Subject,StartTime,EndTime,AllDay,Recurrence,RecurrenceRule,Description,StartTimeZone,EndTimeZone) VALUES (@Subject,@StartTime,@EndTime,@AllDay,@Recurrence,@RecurrenceRule,@Description,@StartTimeZone,@EndTimeZone)";
                    if (string.IsNullOrEmpty(value.Subject))
                        cmd.Parameters.AddWithValue("@Subject", DBNull.Value);
                    else
                        cmd.Parameters.AddWithValue("@Subject", value.Subject);
                    cmd.Parameters.AddWithValue("@StartTime", value.StartTime);
                    cmd.Parameters.AddWithValue("@EndTime", value.EndTime);
                    cmd.Parameters.AddWithValue("@AllDay", value.AllDay);
                    cmd.Parameters.AddWithValue("@Recurrence", value.Recurrence);
                    if (string.IsNullOrEmpty(value.RecurrenceRule))
                        cmd.Parameters.AddWithValue("@RecurrenceRule", DBNull.Value);
                    else
                        cmd.Parameters.AddWithValue("@RecurrenceRule", value.RecurrenceRule);
                    if (string.IsNullOrEmpty(value.Description))
                        cmd.Parameters.AddWithValue("@Description", DBNull.Value);
                    else
                        cmd.Parameters.AddWithValue("@Description", value.Description);
                    if (string.IsNullOrEmpty(value.StartTimeZone))
                        cmd.Parameters.AddWithValue("@StartTimeZone", DBNull.Value);
                    else
                        cmd.Parameters.AddWithValue("@StartTimeZone", value.StartTimeZone);
                    if (string.IsNullOrEmpty(value.EndTimeZone))
                        cmd.Parameters.AddWithValue("@EndTimeZone", DBNull.Value);
                    else
                        cmd.Parameters.AddWithValue("@EndTimeZone", value.EndTimeZone);
                    cmd.Connection = myCon;
                    myCon.Open();
                    cmd.ExecuteNonQuery();
                    myCon.Close();
                }
            }
            if (param.action == "remove" || param.deleted != null)  // this block of code will execute while removing the appointment
            {
                if (param.action == "remove")
                {
                    using (OleDbConnection myCon = new OleDbConnection(stringAccessConn))
                    {
                        myCon.Open();
                        OleDbCommand cmd = new OleDbCommand("DELETE FROM DefaultSchedule WHERE Id = @Key", myCon);
                        cmd.Parameters.AddWithValue("@Key", param.key);
                        cmd.ExecuteNonQuery();
                        myCon.Close();
                    }
                }
                else
                {
                    foreach (var apps in param.deleted)
                    {
                        using (OleDbConnection myCon = new OleDbConnection(stringAccessConn))
                        {
                            myCon.Open();
                            OleDbCommand cmd = new OleDbCommand("DELETE FROM DefaultSchedule WHERE Id = @Key", myCon);
                            cmd.Parameters.AddWithValue("@Key", apps.Id);
                            cmd.ExecuteNonQuery();
                            myCon.Close();
                        }
                    }
                }
            }
            if ((param.action == "batch" && param.changed != null) || param.action == "update")   // this block of code will execute while updating the appointment
            {
                var value = param.action == "update" ? param.value : param.changed[0];
                using (OleDbConnection myCon = new OleDbConnection(stringAccessConn))
                {
                    myCon.Open();
                    OleDbCommand cmd = new OleDbCommand("UPDATE DefaultSchedule SET Subject=@Subject,StartTime=@StartTime,EndTime=@EndTime,AllDay=@AllDay,Recurrence=@Recurrence,RecurrenceRule=@RecurrenceRule,Description=@Description,StartTimeZone=@StartTimeZone,EndTimeZone=@EndTimeZone  WHERE Id = @Key", myCon);
                    if (string.IsNullOrEmpty(value.Subject))
                        cmd.Parameters.AddWithValue("@Subject", DBNull.Value);
                    else
                        cmd.Parameters.AddWithValue("@Subject", value.Subject);
                    cmd.Parameters.AddWithValue("@StartTime", value.StartTime);
                    cmd.Parameters.AddWithValue("@EndTime", value.EndTime);
                    cmd.Parameters.AddWithValue("@AllDay", value.AllDay);
                    cmd.Parameters.AddWithValue("@Recurrence", value.Recurrence);
                    if (string.IsNullOrEmpty(value.RecurrenceRule))
                        cmd.Parameters.AddWithValue("@RecurrenceRule", DBNull.Value);
                    else
                        cmd.Parameters.AddWithValue("@RecurrenceRule", value.RecurrenceRule);
                    if (string.IsNullOrEmpty(value.Description))
                        cmd.Parameters.AddWithValue("@Description", DBNull.Value);
                    else
                        cmd.Parameters.AddWithValue("@Description", value.Description);
                    if (string.IsNullOrEmpty(value.StartTimeZone))
                        cmd.Parameters.AddWithValue("@StartTimeZone", DBNull.Value);
                    else
                        cmd.Parameters.AddWithValue("@StartTimeZone", value.StartTimeZone);
                    if (string.IsNullOrEmpty(value.EndTimeZone))
                        cmd.Parameters.AddWithValue("@EndTimeZone", DBNull.Value);
                    else
                        cmd.Parameters.AddWithValue("@EndTimeZone", value.EndTimeZone);
                    cmd.Parameters.AddWithValue("@Key", value.Id);
                    cmd.ExecuteNonQuery();
                    myCon.Close();
                }
            }
            OleDbConnection myAccessConn = new OleDbConnection(stringAccessConn);
            OleDbCommand myAccessCommand = new OleDbCommand("SELECT * FROM DefaultSchedule", myAccessConn);
            OleDbDataAdapter myDataAdapter = new OleDbDataAdapter(myAccessCommand);
            DataSet myDataSet = new DataSet();
            myAccessConn.Open();
            myDataAdapter.Fill(myDataSet, "DefaultSchedule");
            List<ScheduleData> datasource = new List<ScheduleData>();
            datasource = myDataSet.Tables[0].AsEnumerable().Select(dataRow => new ScheduleData { Id = dataRow.Field<int>("Id"), Subject = dataRow.Field<string>("Subject"), StartTime = dataRow.Field<DateTime>("StartTime"), EndTime = dataRow.Field<DateTime>("EndTime"), AllDay = dataRow.Field<bool>("AllDay"), Recurrence = dataRow.Field<bool>("Recurrence"), RecurrenceRule = dataRow.Field<string>("RecurrenceRule"), Description = dataRow.Field<string>("Description"), StartTimeZone = dataRow.Field<string>("StartTimeZone"), EndTimeZone = dataRow.Field<string>("EndTimeZone") }).ToList();
            myAccessConn.Close();
            return Json(datasource, JsonRequestBehavior.AllowGet);
        }
        
        // Class definition for EditParams to be used as parameter in the above Crud method for receiving the object value in it.
        public class EditParams
        {
            public string key { get; set; }
            public string action { get; set; }
            public List<ScheduleData> added { get; set; }
            public List<ScheduleData> changed { get; set; }
            public List<ScheduleData> deleted { get; set; }
            public ScheduleData value { get; set; }
        }

Controller Action Binding with CRUD operation

Scheduler supports binding appointment data from the controller by using various available options of DataSource property like URL, BatchURL, InsertURL, UpdateURL, RemoveURL and Adaptor.

RAZOR

@(Html.EJ().Schedule("Schedule1")
        .Width("100%")
        .Height("525px")
        .CurrentDate(new DateTime(2015, 11, 5))
        .AppointmentSettings(fields => fields.Datasource(dataSource => dataSource.URL("Home/GetData").BatchURL("Home/Crud").InsertURL("Home/add").UpdateURL("Home/update").RemoveURL("Home/remove").Adaptor(AdaptorType.UrlAdaptor))
            .Id("Id")
            .Subject("Subject")
            .StartTime("StartTime")
            .EndTime("EndTime")
            .Description("Description")
            .AllDay("AllDay")
            .Recurrence("Recurrence")
            .RecurrenceRule("RecurrenceRule"))
)

The server-side controller code to handle the CRUD operations are as follows.

C#

// To initially bind the appointments with Scheduler
public JsonResult GetData()
{
    // ScheduleDataDataContext is a LINQ-to-SQL data class name that is defined in the .dbml file to access the tables from the database 
    IEnumerable data = new ScheduleDataDataContext().Appointments.Take(100); 
    return Json(data, JsonRequestBehavior.AllowGet);
}

// Triggers while saving a new appointment through quick window
public JsonResult add(Appointment value)
{
    ScheduleDataDataContext db = new ScheduleDataDataContext();
    int intMax = db.Appointments.ToList().Count > 0 ? db.Appointments.ToList().Max(p => p.Id) : 1;
    Appointment appoint = new Appointment()
    {
        Id = intMax + 1,
        StartTime = value.StartTime,
        EndTime = value.EndTime,
        Subject = value.Subject,
        Description = value.Description,
        OwnerId = value.OwnerId,
        Recurrence = value.Recurrence,
        AllDay = value.AllDay,
        RecurrenceRule = value.RecurrenceRule
    };
    db.Appointments.InsertOnSubmit(appoint);
    db.SubmitChanges();
    IEnumerable data = new ScheduleDataDataContext().Appointments.Take(500); 
    return Json(data, JsonRequestBehavior.AllowGet);
}

// Triggers while editing/dragging/resizing the existing appointment
public JsonResult update(Appointment value)
{
    ScheduleDataDataContext db = new ScheduleDataDataContext();
    var filterData = db.Appointments.Where(c => c.Id == Convert.ToInt32(value.Id));
    Appointment appoint = db.Appointments.Single(A => A.Id == Convert.ToInt32(value.Id));
    if (filterData.Count() > 0)
    {
        DateTime startTime = Convert.ToDateTime(value.StartTime);
        DateTime endTime = Convert.ToDateTime(value.EndTime);
        appoint.StartTime = startTime;
        appoint.EndTime = endTime;
        appoint.Subject = value.Subject;
        appoint.Description = value.Description;
        appoint.OwnerId = value.OwnerId;
        appoint.Recurrence = Convert.ToByte(value.Recurrence);
        appoint.AllDay = value.AllDay;
        appoint.RecurrenceRule = value.RecurrenceRule;
    }
    db.SubmitChanges();
    IEnumerable data = new ScheduleDataDataContext().Appointments.Take(500); 
    return Json(data, JsonRequestBehavior.AllowGet);
}

// Triggers when an appointment is deleted
public JsonResult remove(string key)
{
    ScheduleDataDataContext db = new ScheduleDataDataContext();
    Appointment app = db.Appointments.Where(c => c.Id == Convert.ToInt32(key)).FirstOrDefault();
    if (app != null) db.Appointments.DeleteOnSubmit(app);
    db.SubmitChanges();
    IEnumerable data = new ScheduleDataDataContext().Appointments.Take(500); 
    return Json(data, JsonRequestBehavior.AllowGet);
}

// Triggers for any of the Scheduler CRUD operation
public JsonResult Crud(EditParams param)
{
    ScheduleDataDataContext db = new ScheduleDataDataContext();
    if (param.action == "insert" || (param.action == "batch" && param.added != null))  // this block of code will execute while inserting the appointments
    {
        var value = param.action == "insert" ? param.value : param.added[0];
        int intMax = db.Appointments.ToList().Count > 0 ? db.Appointments.ToList().Max(p => p.Id) : 1;
        DateTime startTime = Convert.ToDateTime(value.StartTime);
        DateTime endTime = Convert.ToDateTime(value.EndTime);
        Appointment appoint = new Appointment()
        {
            Id = intMax + 1,
            StartTime = startTime,
            EndTime = endTime,
            Subject = value.Subject,
            Description = value.Description,
            OwnerId = value.OwnerId,
            Recurrence = value.Recurrence,
            AllDay = value.AllDay,
            RecurrenceRule = value.RecurrenceRule
        };
        db.Appointments.InsertOnSubmit(appoint);
        db.SubmitChanges();
    }
    else if (param.action == "remove")  // this block of code will execute while removing the appointment
    {
        Appointment app = db.Appointments.Where(c => c.Id == Convert.ToInt32(param.key)).FirstOrDefault();
        if (app != null) db.Appointments.DeleteOnSubmit(app);
        db.SubmitChanges();
    }
    else if ((param.action == "batch" && param.changed != null) || param.action == "update")   // this block of code will execute while updating the appointment
    {
        var value = param.action == "update" ? param.value : param.changed[0];
        var filterData = db.Appointments.Where(c => c.Id == Convert.ToInt32(value.Id));
        if (filterData.Count() > 0)
        {
            DateTime startTime = Convert.ToDateTime(value.StartTime);
            DateTime endTime = Convert.ToDateTime(value.EndTime);
            Appointment appoint = db.Appointments.Single(A => A.Id == Convert.ToInt32(value.Id));
            appoint.StartTime = startTime;
            appoint.EndTime = endTime;
            appoint.Subject = value.Subject;
            appoint.Description = value.Description;
            appoint.OwnerId = value.OwnerId;
            appoint.Recurrence = Convert.ToByte(value.Recurrence);
            appoint.AllDay = value.AllDay;
            appoint.RecurrenceRule = value.RecurrenceRule;
        }
        db.SubmitChanges();
    }
    IEnumerable data = new ScheduleDataDataContext().Appointments.Take(500); 
    return Json(data, JsonRequestBehavior.AllowGet);
}

// Class definition for EditParams to be used as parameter in the above Crud method for receiving the object value in it.
public class EditParams
{
    public string key { get; set; }
    public string action { get; set; }
    public List<Appointment> added { get; set; }
    public List<Appointment> changed { get; set; }
    public Appointment value { get; set; }
}

Loading Data on Demand

Load on demand feature allows the Scheduler to retrieve only the filtered appointment data (for the current Scheduler date range) from the service/database during loading time, and that too only for the current Scheduler view. There are 3 parameters made available on the server-side namely CurrentDate, CurrentView and CurrentAction through which only the necessary appointments are retrieved from the database and then assigned to the Scheduler dataSource. With this kind of Scheduler action, consuming only lesser data will reduce the usage of network bandwidth size and loading time.

The EnableLoadOnDemand property is used to enable or disable the load on demand functionality of the schedule.

RAZOR

@(Html.EJ().Schedule("Schedule1")
        .Width("100%")
        .Height("525px")
        .CurrentDate(new DateTime(2015, 11, 5))
        .EnableLoadOnDemand(true)
        .AppointmentSettings(fields => fields.Datasource(dataSource => dataSource.URL("http://mvc.syncfusion.com/OdataServices/api/ScheduleData/").CrossDomain(true))
            .Id("Id")
            .Subject("Subject")
            .StartTime("StartTime")
            .EndTime("EndTime")
            .Description("Description")
            .AllDay("AllDay")
            .Recurrence("Recurrence")
            .RecurrenceRule("RecurrenceRule"))
)

The server-side code to load the Scheduler data on demand is as follows.

C#

// retrieve the appointments based on the current date.
    public IEnumerable<Event> GetData(String CurrentDate, String CurrentView, String CurrentAction)
    {
        var dateString = Regex.Match(CurrentDate.ToString(), @"^(\w+\b.*?){4}").ToString(); 
        string format = "ddd MMM dd yyyy"; 
        DateTime dateTimeValue;
        try
        {
            dateTimeValue = DateTime.ParseExact(dateString, format, CultureInfo.InvariantCulture);
        }
        catch(FormatException)
        {
            var dateSplit = CurrentDate.Split(' ');//For IE<=10 Fri Mar 20 11:00:22 UTC+0530 2015
            if (dateSplit[2].Length == 1) dateSplit[2] = string.Concat("0", dateSplit[2]);
            dateString = string.Concat(dateSplit[0], ' ', dateSplit[1], ' ', dateSplit[2], ' ', dateSplit[dateSplit.Length - 1]);
            dateTimeValue = DateTime.ParseExact(dateString, format, CultureInfo.InvariantCulture);
        }
    	// AppointmentReposit is a user-defined class within which the FilterAppointment method is defined. 
        AppointmentReposit rep = new AppointmentReposit();
        var data = rep.FilterAppointment(dateTimeValue, CurrentAction, CurrentView); 
        return data;
    }

    // Method to filter the appointments based on the date range
    public List<Event> FilterAppointment(DateTime CurrentDate, String CurrentAction, String CurrentView)
    {
        DateTime CurrDate = Convert.ToDateTime(CurrentDate);
        DateTime StartDate = FirstWeekDate(CurrDate.Date);
        DateTime EndDate = FirstWeekDate(CurrDate.Date);
        List<Event> appointmentList = new NORTHWNDEntities().Events.ToList();
        switch (CurrentView)
        {
            case "day":
                StartDate = CurrentDate;
                EndDate = CurrentDate;
                break;
            case "week":
                EndDate = EndDate.AddDays(7);
                break;
            case "workweek":
                EndDate = EndDate.AddDays(5);
                break;
            case "month":
                StartDate = CurrDate.Date.AddDays(-CurrDate.Day + 1);
                EndDate = StartDate.AddMonths(1);
                break;
        }
        appointmentList = new NORTHWNDEntities().Events.ToList().Where(app =>
        ((Convert.ToDateTime(app.StartTime).Date >= Convert.ToDateTime(StartDate.Date)) &&
        (Convert.ToDateTime(app.EndTime).Date <= Convert.ToDateTime(EndDate.Date)))).ToList();
        return appointmentList;
    }
    
    internal static DateTime FirstWeekDate(DateTime CurrentDate)
    {
        try
        {
            DateTime FirstDayOfWeek = CurrentDate;
            DayOfWeek WeekDay = FirstDayOfWeek.DayOfWeek;
            switch (WeekDay)
            {
                case DayOfWeek.Sunday:
                    break;
                case DayOfWeek.Monday:
                    FirstDayOfWeek = FirstDayOfWeek.AddDays(-1);
                    break;
                case DayOfWeek.Tuesday:
                    FirstDayOfWeek = FirstDayOfWeek.AddDays(-2);
                    break;
                case DayOfWeek.Wednesday:
                    FirstDayOfWeek = FirstDayOfWeek.AddDays(-3);
                    break;
                case DayOfWeek.Thursday:
                    FirstDayOfWeek = FirstDayOfWeek.AddDays(-4);
                    break;
                case DayOfWeek.Friday:
                    FirstDayOfWeek = FirstDayOfWeek.AddDays(-5);
                    break;
                case DayOfWeek.Saturday:
                    FirstDayOfWeek = FirstDayOfWeek.AddDays(-6);
                    break;
            }
            return (FirstDayOfWeek);
        }
        catch
        {
            return DateTime.Now;
        }
    }

Entity Framework Data Binding

The appointment data can be bound to the Scheduler through Entity Framework which supports Entity Data Model(EDM) defining the data at conceptual level. To know more on how to create and use the Entity Data Model, refer here.

RAZOR

@(Html.EJ().Schedule("Schedule1")
        .Width("100%")
        .Height("525px")
        .CurrentDate(new DateTime(2015, 11, 5))
        .AppointmentSettings(fields => fields.Datasource(Model)
            .Id("Id")
            .Subject("Subject")
            .StartTime("StartTime")
            .EndTime("EndTime")
            .Description("Description")
            .AllDay("AllDay")
            .Recurrence("Recurrence")
            .RecurrenceRule("RecurrenceRule"))
)

C#

ScheduleControlDataEntities db = new ScheduleControlDataEntities(); // Create an object of the entity class to access its underlying tables within the controller page.
        public ActionResult Index()
        {
            return View();
        }

        public JsonResult GetData()
        {
            IEnumerable data = new ScheduleControlDataEntities().Appointments.Take(100);
            return Json(data, JsonRequestBehavior.AllowGet);
        }
        public JsonResult Batch(EditParams param)
        {
            // this block of code will execute while inserting the appointments
            if (param.action == "insert" || (param.action == "batch" && param.added != null)) 
            {
                var value = param.action == "insert" ? param.value : param.added[0];
                int intMax = db.Appointments.ToList().Count > 0 ? db.Appointments.ToList().Max(p => p.Id) : 1;
                DateTime startTime = Convert.ToDateTime(value.StartTime);
                DateTime endTime = Convert.ToDateTime(value.EndTime);
                var currentTimeZone = TimeZone.CurrentTimeZone;
                Appointment appoint = new Appointment()
                {
                    Id = value.Id,
                    StartTime = startTime,
                    EndTime = endTime,
                    StartTimeZone=value.StartTimeZone,
                    EndTimeZone=value.EndTimeZone,
                    Subject = value.Subject,                   
                    Description = value.Description,                    
                    Recurrence = value.Recurrence,
                    RoomId = value.RoomId,
                    OwnerId = value.OwnerId,
                    CategoryId = value.CategoryId,
                    AllDay = value.AllDay,                   
                    RecurrenceRule = value.RecurrenceRule,                   
                };
                db.Appointments.Add(appoint);
                db.SaveChanges();
            }
            if (param.action == "remove" || param.deleted != null) 
            // this block of code will execute while removing the appointment 
            {
                if (param.action == "remove")
                {
                    int key = Convert.ToInt32(param.key);
                    Appointment app = db.Appointments.Where(c => c.Id == key).FirstOrDefault();
                    if (app != null) db.Appointments.Remove(app);
                }
                else
                {
                    foreach (var apps in param.deleted)
                    {
                        Appointment app = db.Appointments.Where(c => c.Id == apps.Id).FirstOrDefault();
                        if (apps != null) db.Appointments.Remove(app);
                    }
                }
                db.SaveChanges();
            }
            if ((param.action == "batch" && param.changed != null) || param.action == "update")   
            {
               // this block of code will execute while updating the appointment
                var value = param.action == "update" ? param.value : param.changed[0];
                var filterData = db.Appointments.Where(c => c.Id == Convert.ToInt32(value.Id));

                if (filterData.Count() > 0)
                {
                    DateTime startTime = Convert.ToDateTime(value.StartTime);
                    DateTime endTime = Convert.ToDateTime(value.EndTime);
                    Appointment appoint = db.Appointments.Single(A => A.Id == Convert.ToInt32(value.Id));
                    appoint.StartTime = startTime;
                    appoint.EndTime = endTime;
                    appoint.Subject = value.Subject;
                    appoint.StartTimeZone = value.StartTimeZone;
                    appoint.EndTimeZone = value.EndTimeZone;
                    appoint.Description = value.Description;
                    appoint.OwnerId = value.OwnerId;                  
                    appoint.Recurrence = Convert.ToByte(value.Recurrence);
                    appoint.RoomId = value.RoomId;
                    appoint.AllDay = value.AllDay;
                    appoint.RecurrenceRule = value.RecurrenceRule;
                }
                db.SaveChanges();
            }
            IEnumerable data = new ScheduleControlDataEntities().Appointments.Take(500); // new.Appointment.Take(5);
            return Json(data, JsonRequestBehavior.AllowGet);
        }

SQL Data Binding

Binding SQL data to Scheduler is quite simple and also it supports the complete CRUD operation to be performed on the appointment data easily.

RAZOR

@(Html.EJ().Schedule("Schedule1")
        .Width("100%")
        .Height("525px")
        .CurrentDate(new DateTime(2015, 11, 5))
        .AppointmentSettings(fields => fields.Datasource(dataSource => dataSource.URL("/Home/GetData").CrudURL("/Home/Batch").Adaptor("UrlAdaptor"))
            .Id("Id")
            .Subject("Subject")
            .StartTime("StartTime")
            .EndTime("EndTime")
            .AllDay("AllDay")
            .Recurrence("Recurrence")
            .RecurrenceRule("RecurrenceRule"))
)

C#

// Mention the correct path of the database to connect. Also ensure, whether the provided database already exists.
        SqlConnection connection = new SqlConnection(@"Data Source=(LocalDB)\MSSQLLocalDB;AttachDbFilename=|DataDirectory|\ScheduleDatabase.mdf;Integrated Security=True");

        public ActionResult Index()
        {
            return View();
        }
        
        public JsonResult GetData()
        {
           
            using (connection)
            {
               
                DataTable myDataSet = new DataTable();
                SqlConnection myAccessConn = new SqlConnection(@"Data Source=(LocalDB)\MSSQLLocalDB;AttachDbFilename=|DataDirectory|\ScheduleControlData.mdf;Integrated Security=True");
                SqlCommand myAccessCommand = new SqlCommand("SELECT * FROM ScheduleData", myAccessConn);
                SqlDataAdapter myDataAdapter = new SqlDataAdapter(myAccessCommand);
                myAccessConn.Open();
                myDataAdapter.Fill(myDataSet);
                List<DataRow> datasource = myDataSet.AsEnumerable().ToList();

                List<ScheduleDatabase> scheduleList = new List<ScheduleDatabase>();
                for (int i = 0; i < datasource.Count; i++)
                {
                    ScheduleDatabase datum = new ScheduleDatabase();
                    datum.Id = Convert.ToInt32(datasource[i]["Id"]);
                    datum.Subject = datasource[i]["Subject"].ToString();
                    datum.StartTime = Convert.ToDateTime(datasource[i]["StartTime"]);
                    datum.EndTime = Convert.ToDateTime(datasource[i]["EndTime"]);
                    datum.AllDay = Convert.ToBoolean(datasource[i]["AllDay"]);
                    datum.Recurrence = Convert.ToBoolean(datasource[i]["Recurrence"]);
                    datum.RecurrenceRule = datasource[i]["RecurrenceRule"].ToString();
                    datum.StartTimeZone = datasource[i]["StartTimeZone"].ToString();
                    datum.EndTimeZone = datasource[i]["EndTimeZone"].ToString();
                    datum.Description = datasource[i]["Description"].ToString();
                    scheduleList.Add(datum);
                } 
                myAccessConn.Close();
                return Json(scheduleList, JsonRequestBehavior.AllowGet);
            }
        }
        public class ScheduleDatabase
        {
            public int Id { get; set; }
            public string Subject { get; set; }
            public DateTime StartTime { get; set; }
            public DateTime EndTime { get; set; }
            public Boolean AllDay { get; set; }
            public Boolean Recurrence { get; set; }
            public string RecurrenceRule { get; set; }
            public string StartTimeZone { get; set; }
            public string EndTimeZone { get; set; }
            public string Description { get; set; }
        }
        
        // To perform other CRUD operations
        public JsonResult Batch(EditParams param)
        {
            if (param.action == "insert" || (param.action == "batch" && param.added != null))
            {
                var value = param.action == "insert" ? param.value : param.added[0];
                connection.Open();
                sqlCommand = "insert into ScheduleData (Id,EndTime,Recurrence,StartTime,Subject,AllDay,RecurrenceRule,StartTimeZone,EndTimeZone,Description) values(" + value.Id + ",'" + value.EndTime + "','" + value.Recurrence + "','" + value.StartTime + "','" + value.Subject + "','" + value.AllDay + "','" + value.RecurrenceRule +"','" + value.StartTimeZone + "','" + value.EndTimeZone + "','" + value.Description + "')";
                adapter1.InsertCommand = new SqlCommand(sqlCommand, connection);
                adapter1.InsertCommand.ExecuteNonQuery();
                connection.Close();
            }
            if (param.action == "remove" || param.deleted != null)
            {
                connection.Open();
                if (param.action == "remove")
                {
                    int key = Convert.ToInt32(param.key);
                    SqlCommand delete = new SqlCommand("delete from ScheduleData where Id=" + key + "", connection);
                    delete.ExecuteNonQuery();
                }
                else
                {
                    foreach (var apps in param.deleted)
                    {
                        SqlCommand delete = new SqlCommand("delete from ScheduleData where Id=" + apps.Id + "", connection);
                        delete.ExecuteNonQuery();
                    }
                }
                connection.Close();
            }
            if ((param.action == "batch" && param.changed != null) || param.action == "update")
            {
                connection.Open();
                var value = param.action == "update" ? param.value : param.changed[0];
                sqlCommand = "update scheduleData set EndTime='" + value.EndTime + "',Recurrence='" + value.Recurrence + "',StartTime='" + value.StartTime + "',Subject='" + value.Subject + "',AllDay='" + value.AllDay + "',RecurrenceRule='" + value.RecurrenceRule + "',StartTimeZone = '" + value.StartTimeZone + "',EndTimeZone = '" + value.EndTimeZone + "'where Id='" + value.Id + "'";
                adapter1.UpdateCommand = new SqlCommand(sqlCommand, connection);
                adapter1.UpdateCommand.ExecuteNonQuery();
                connection.Close();
            }
           return GetData();
        }