Data Binding
8 Jun 202317 minutes to read
Local Data Binding
Essential Studio Web JS ListView provides support for Data Binding. Data Binding provides a simple and consistent way for applications to present and interact with data. Elements can be bounded to data from a variety of data sources. In local data binding, the data source is written inside the program. Then it is handled by the ListView control. DataSource is used to get the data source that holds the list items.
Create div element to render the ListView sample.
<div id="defaultlistview" ></div>Add the following script in your code.
window.dbitem =
[
{ "text": "Hot Singles" },
{ "text": "Rising Artists" },
{ "text": "Live Music" },
{ "text": "Best of 2013 So Far" },
{ "text": "100 Albums - $5 Each" },
{ "text": "Hip-Hop and R&B Sale" },
{ "text": "CD Deals" },
{ "text": "Songs" },
{ "text": "Bestselling Albums" },
{ "text": "New Releases" },
{ "text": "Bestselling Songs" },
{ "text": "Rock" },
{ "text": "Gospel" },
{ "text": "Latin Music" },
{ "text": "Jazz" },
{ "text": "Music Trade-In" },
{ "text": "Redeem a Gift Card" },
{ "text": "Band T-Shirts" },
{ "text": "Web MVC" }];
$(function () {
var sample = new ej.ListView($("#listview”), {
dataSource:window.dbitem,
width:400
});
});Run the code to get the following output
Remote Data Binding
Essential Studio Web JS ListView provides support for Data Binding.
OData
OData is a standardized protocol for creating and consuming the data. You can retrieve data from OData service by using ej.DataManager.
Here the CustomerID field is mapped with text property of the field object. The queries can be created using ej.Query().
<div id="listview"></div>var dataManger = ej.DataManager({ url: "http://js.syncfusion.com/ejservices/Wcf/Northwind.svc/", crossDomain: true
});
var query = ej.Query().from('Customers').take(10);
$(function () {
var sample = new ej.ListView($("#listview”"), {
datasource: dataManger,
fieldsettings: { "text": "CustomerID" },
query: query
});
});Run the code to get the following output
URL Adaptor
URL Adaptor of DataManager can be used when you are required to use remote service to retrieve data. It interacts with server-side for all DataManager Queries and CRUD operations.
Now, in the following code example the data is retrieved from MVC Controller.
<div id="listview"></div>var dataManager = ej.DataManager({ url: "Home/Data", adaptor: new ej.UrlAdaptor() });
var query = ej.Query().take(10);
$(function () {
var sample = new ej.ListView($("#listview"), {
datasource: dataManager,
fieldsettings: { "text": "caption" },
query: query
});
});public partial class ListviewController : Controller
{
public JsonResult DataSource()
{
IEnumerable Data = setListSource();
return Json(Data, JsonRequestBehavior.AllowGet);
}
public static List<ListLocalData> setListSource()
{
List<ListLocalData> listSource = new List<ListLocalData>();
listSource.Add(new ListLocalData { caption = "Hot Singles" });
listSource.Add(new ListLocalData { caption = "Rising Artists" });
listSource.Add(new ListLocalData { caption = "Live Music" });
listSource.Add(new ListLocalData { caption = "Best of 2013 So Far" });
listSource.Add(new ListLocalData { caption = "100 Albums - $5 Each" });
listSource.Add(new ListLocalData { caption = "Hip-Hop and R&B Sale" });
listSource.Add(new ListLocalData { caption = "CD Deals" });
listSource.Add(new ListLocalData { caption = "Songs" });
listSource.Add(new ListLocalData { caption = "Bestselling Albums" });
listSource.Add(new ListLocalData { caption = "New Releases" });
return listSource;
}Run the code to get the following output
WebAPI
WebApi Adaptor, extended from ODataAdaptor, of DataManager is used for retrieving data from WebApi service.ASP.NET Web API is a Framework for building HTTP services. You can retrieve data from ASP.NET Web API by using ej.DataManager.
<div id="listview"></div><script>
var dataManger = ej.DataManager({
url: "http://js.syncfusion.com/ejservices/Wcf/Northwind.svc/Customers",
crossDomain: true,
adaptor: new ej.WebApiAdaptor()
});
var query = ej.Query();
$(function () {
var sample = new ej.ListView($("#listview"), {
datasource: dataManger,
fieldsettings: { "text": "CustomerID" },
query: query
});
});
</script>Run the code to get the following output
FieldSettings
The data-ej-FieldSettings attribute is used to map the DataSource field with the list item fields. In addition to the list item specific properties, the following fields are available while mapping.
FieldSettings
| Properties | Definition |
| ParentPrimaryKey | In DB, you can relate any child item to some other item. Set here is ‘PrimaryKey’ for the parent item. Here ‘ParentPrimaryKey’ defines the ‘PrimaryKey’ of some parent item to identify its parent. |
| Attributes | In DB, you can define your desired class name or styles for the list item through the ‘Attributes’ field. |
Please refer the following code examples.
<div id="defaultlistbox"></div>Add the following script in your code.
window.dbitem =
[{ "Texts": "Discover Music", "PrimaryKeys": "1", "Title": "Discover Music", "BackIconText": "back" },
{ "Texts": "Hot Singles", "ParentPrimaryKeyss": "1" },
{ "Texts": "Rising Artists", "PrimaryKeyss": null, "ParentPrimaryKeyss": "1" },
{ "Texts": "Live Music", "ParentPrimaryKeyss": "1" },
{ "Texts": "Best of 2013 So Far", "ParentPrimaryKeyss": "1" },
{ "Texts": "Sales and Events", "PrimaryKeys": "2", "Title": "Sales and Events", "BackIconText": "back" },
{ "Texts": "100 Albums - $5 Each", "ParentPrimaryKeyss": "2" },
{ "Texts": "Hip-Hop and R&B Sale", "ParentPrimaryKeyss": "2" },
{ "Texts": "CD Deals", "ParentPrimaryKeyss": "2" },
{ "Texts": "Categories", "PrimaryKeys": "3", "Title": "Categories", "BackIconText": "back" },
{ "Texts": "Songs", "ParentPrimaryKeyss": "3" },
{ "Texts": "Bestselling Albums", "ParentPrimaryKeyss": "3" },
{ "Texts": "New Releases", "ParentPrimaryKeyss": "3" },
{ "Texts": "Bestselling Songs", "ParentPrimaryKeyss": "3" },
{ "Texts": "MP3 Albums", "PrimaryKeys": "4", "Title": "MP3 Albums", "BackIconText": "back" },
{ "Texts": "Rock", "ParentPrimaryKeyss": "4" },
{ "Texts": "Gospel", "ParentPrimaryKeyss": "4" },
{ "Texts": "Latin Music", "ParentPrimaryKeyss": "4" },
{ "Texts": "Jazz", "ParentPrimaryKeyss": "4" },
{ "Texts": "More in Music", "PrimaryKeys": "5", "Title": "More in Music", "BackIconText": "back" },
{ "Texts": "Music Trade-In", "ParentPrimaryKeyss": "5" },
{ "Texts": "Redeem a Gift Card", "ParentPrimaryKeyss": "5" },
{ "Texts": "Band T-Shirts", "ParentPrimaryKeyss": "5" },
{ "Texts": "Web MVC", "ParentPrimaryKeyss": "5" }];
window.musicFields = {
"text": "Texts",
"primaryKey": "PrimaryKeys",
"parentPrimaryKey": "ParentPrimaryKeyss",
"childHeaderTitle": "Title",
"childHeaderBackButtonText": "BackIconText"
};
$(function () {
var sample = new ej.ListView($("#defaultlistbox"), {
fieldSettings: window.musicFields,
dataSource:window.dbitem,
width: 400,
showHeader:true,
headerTitle:"ListView"
});
});Run the code to get the following output
When you click on the parent item, it navigates to its corresponding child list item as follows.
