Class GroupsInDetailsCollection

A Read-only collection of Group elements that are children of a GroupsDetails section. An instance of this collection is returned by the Groups property of a GroupsDetails object. The Groups property of a Group does also return an instance of this collection if the group's details section contains groups (and not records). Otherwise an empty collection is returned.

Inheritance

System.Object

GroupsInDetailsCollection

Implements

System.Collections.IList

System.Collections.ICollection

System.Collections.IEnumerable

System.IDisposable

Inherited Members

System.Object.Equals(System.Object)

System.Object.Equals(System.Object, System.Object)

System.Object.GetHashCode()

System.Object.GetType()

System.Object.MemberwiseClone()

System.Object.ReferenceEquals(System.Object, System.Object)

System.Object.ToString()

Namespace: Syncfusion.Grouping

Assembly: Syncfusion.Grouping.Base.dll

Syntax

public class GroupsInDetailsCollection : IList, ICollection, IEnumerable, IDisposable

Fields

Empty

A Read-only empty collection.

Declaration

public static GroupsInDetailsCollection Empty

Field Value

Type
GroupsInDetailsCollection

Properties

Count

Gets the number of elements contained in the collection. The property also ensures that the collection is in sync with the underlying table if changes have been made to the Table or the TableDescriptor.

Declaration

public int Count { get; }

Property Value

Type
System.Int32

Remarks

The method ensures that the collection is in sync with the underlying table if changes have been made to the Table or the TableDescriptor.

The method calls EnsureInitialized(Object, Boolean).

IsFixedSize

Returns False since this collection has no fixed size.

Declaration

public bool IsFixedSize { get; }

Property Value

Type
System.Boolean

IsReadOnly

Returns True because this collection is always Read-only.

Declaration

public bool IsReadOnly { get; }

Property Value

Type
System.Boolean

IsSynchronized

Returns False.

Declaration

public bool IsSynchronized { get; }

Property Value

Type
System.Boolean

Item[Int32]

Gets the group at the specified non-zero based index. Setting is not supported and will throw an exception since the collection is Read-only.

Declaration

public Group this[int index] { get; set; }

Parameters

Type	Name	Description
System.Int32	index	Item index.

Property Value

Type
Group

Remarks

The method ensures that the collection is in sync with the underlying table if changes have been made to the Table or the TableDescriptor.

The method calls EnsureInitialized(Object, Boolean).

Item[String]

Searches for the specified category and returns the found group.

Declaration

public Group this[string category] { get; }

Parameters

Type	Name	Description
System.String	category	Category index.

Property Value

Type
Group

Examples

public Form1()
{
    //
    // Required for Windows Form Designer support
    //
    InitializeComponent();

    this.groupingGrid1.ShowNavigationBar = true;
    this.groupingGrid1.TableControl.HorizontalScrollTips = false;
    this.groupingGrid1.BorderStyle = BorderStyle.FixedSingle;
    this.groupingGrid1.FilterRuntimeProperties = true;

   DataSet ds = new DataSet();
   ReadXml(ds, @"Data\Expand.xml");
 
    ds.Tables[1].TableName = "Products";
    ds.Tables[2].TableName = "OrderDetails";
    ds.Tables[3].TableName = "Suppliers";
 
    ds.Relations.Add(
        ds.Tables[0].Columns["CategoryID"],
        ds.Tables[1].Columns["CategoryID"]);
    ds.Relations[0].RelationName = "Category_Products";
 
    ds.Relations.Add(
        ds.Tables[1].Columns["ProductID"],
        ds.Tables[2].Columns["ProductID"]);
    ds.Relations[1].RelationName = "Products_OrderDetails";
 
    this.groupingGrid1.DataSource = ds.Tables[0];
    Table categoriesTable = groupingGrid1.GetTable("Categories");
    Console.WriteLine(categoriesTable.ToString());

   Table productsTable = categoriesTable.RelatedTables["Products"];
   Console.WriteLine(productsTable.ToString());

   ChildTable product1 = (ChildTable) productsTable.TopLevelGroup.Groups["1"];
   Console.WriteLine(product1.ToString());
   Console.WriteLine(product1.Records[0].ToString());

   ChildTable product21 = (ChildTable) productsTable.TopLevelGroup.Groups["8"];
   Console.WriteLine(product21.ToString());
   Console.WriteLine(product21.Records[0].ToString());
}

Public Sub New() '
   '
   ' Required for Windows Form Designer support
   '
   InitializeComponent()

   Me.groupingGrid1.ShowNavigationBar = True
   Me.groupingGrid1.TableControl.HorizontalScrollTips = False
   Me.groupingGrid1.BorderStyle = BorderStyle.FixedSingle
   Me.groupingGrid1.FilterRuntimeProperties = True
 
    Dim ds As New DataSet()
    ReadXml(ds, "Data\Expand.xml")

   ds.Tables(1).TableName = "Products"
   ds.Tables(2).TableName = "OrderDetails"
   ds.Tables(3).TableName = "Suppliers"

   ds.Relations.Add(ds.Tables(0).Columns("CategoryID"), ds.Tables(1).Columns("CategoryID"))
   ds.Relations(0).RelationName = "Category_Products"

   ds.Relations.Add(ds.Tables(1).Columns("ProductID"), ds.Tables(2).Columns("ProductID"))
   ds.Relations(1).RelationName = "Products_OrderDetails"

   Me.groupingGrid1.DataSource = ds.Tables(0)
   Dim categoriesTable As Table = groupingGrid1.GetTable("Categories")
   Console.WriteLine(categoriesTable.ToString())
   Dim productsTable As Table = categoriesTable.RelatedTables("Products")
   Console.WriteLine(productsTable.ToString())
   Dim product1 As ChildTable = CType(productsTable.TopLevelGroup.Groups("1"), ChildTable)
   Console.WriteLine(product1.ToString())
   Console.WriteLine(product1.Records(0).ToString())
   Dim product21 As ChildTable = CType(productsTable.TopLevelGroup.Groups("8"), ChildTable)
   Console.WriteLine(product21.ToString())
   Console.WriteLine(product21.Records(0).ToString())
End Sub 'New

Methods

Contains(Group)

Determines if the element belongs to this collection.

Declaration

public bool Contains(Group value)

Parameters

Type	Name	Description
Group	value	The Object to locate in the collection. The value can be a NULL reference (Nothing in Visual Basic).

Returns

Type	Description
System.Boolean	True if item is found in the collection; otherwise, False.

Remarks

The method ensures that the collection is in sync with the underlying table if changes have been made to the Table or the TableDescriptor.

The method calls EnsureInitialized(Object, Boolean).

Contains(String)

Searches for the specified category and returns True if it was found.

Declaration

public bool Contains(string category)

Parameters

Type	Name	Description
System.String	category	Category key.

Returns

Type	Description
System.Boolean	Returns True if it was found.

Remarks

The method ensures that the collection is in sync with the underlying table if changes have been made to the Table or the TableDescriptor.

The method calls EnsureInitialized(Object, Boolean).

CopyTo(Group[], Int32)

Copies the entire collection to a compatible one-dimensional Array, starting at the specified index of the target array.

Declaration

public void CopyTo(Group[] array, int index)

Parameters

Type	Name	Description
Group[]	array	The one-dimensional Array that is the destination of the elements copied from ArrayList. The Array must have zero-based indexing.
System.Int32	index	The zero-based index in array at which copying begins.

Remarks

The method ensures that the collection is in sync with the underlying table if changes have been made to the Table or the TableDescriptor.

The method calls EnsureInitialized(Object, Boolean).

Dispose()

Disposes the object.

Declaration

public void Dispose()

FindGroup(Object)

Searches for the specified category and returns the zero-based index of the occurrence.

Declaration

public int FindGroup(object category)

Parameters

Type	Name	Description
System.Object	category	The category key.

Returns

Type	Description
System.Int32	The zero-based index of the occurrence of the category within the entire GroupsInDetailsCollection, if found; otherwise, -1.

Remarks

The method ensures that the collection is in sync with the underlying table if changes have been made to the Table or the TableDescriptor.

The method calls EnsureInitialized(Object, Boolean).

Examples

public Form1()
{
    // Required for Windows Form Designer support
    InitializeComponent();

    this.groupingGrid1.ShowNavigationBar = true;
    this.groupingGrid1.TableControl.HorizontalScrollTips = false;
    this.groupingGrid1.BorderStyle = BorderStyle.FixedSingle;
    this.groupingGrid1.FilterRuntimeProperties = true;

   DataSet ds = new DataSet();
   ReadXml(ds, @"Data\Expand.xml");

   ds.Tables[1].TableName = "Products";
   ds.Tables[2].TableName = "OrderDetails";
   ds.Tables[3].TableName = "Suppliers";

   ds.Relations.Add(
       ds.Tables[0].Columns["CategoryID"],
       ds.Tables[1].Columns["CategoryID"]);
   ds.Relations[0].RelationName = "Category_Products";

   ds.Relations.Add(
       ds.Tables[1].Columns["ProductID"],
       ds.Tables[2].Columns["ProductID"]);
   ds.Relations[1].RelationName = "Products_OrderDetails";

   this.groupingGrid1.DataSource = ds.Tables[0];
   Table categoriesTable = groupingGrid1.GetTable("Categories");
   Console.WriteLine(categoriesTable.ToString());

   Table productsTable = categoriesTable.RelatedTables["Products"];
   Console.WriteLine(productsTable.ToString());

   ChildTable product1 = (ChildTable) productsTable.TopLevelGroup.Groups["1"];
   Console.WriteLine(product1.ToString());
   Console.WriteLine(product1.Records[0].ToString());

   ChildTable product21 = (ChildTable) productsTable.TopLevelGroup.Groups["8"];
   Console.WriteLine(product21.ToString());
   Console.WriteLine(product21.Records[0].ToString());
}

Public Sub New()
   ' Required for Windows Form Designer support
   InitializeComponent()

   Me.groupingGrid1.ShowNavigationBar = True
   Me.groupingGrid1.TableControl.HorizontalScrollTips = False
   Me.groupingGrid1.BorderStyle = BorderStyle.FixedSingle
   Me.groupingGrid1.FilterRuntimeProperties = True

   Dim ds As New DataSet()
   ReadXml(ds, "Data\Expand.xml")
 
    ds.Tables(1).TableName = "Products"
    ds.Tables(2).TableName = "OrderDetails"
    ds.Tables(3).TableName = "Suppliers"

   ds.Relations.Add(ds.Tables(0).Columns("CategoryID"), ds.Tables(1).Columns("CategoryID"))
   ds.Relations(0).RelationName = "Category_Products"

   ds.Relations.Add(ds.Tables(1).Columns("ProductID"), ds.Tables(2).Columns("ProductID"))
   ds.Relations(1).RelationName = "Products_OrderDetails"
 
    Me.groupingGrid1.DataSource = ds.Tables(0)
    Dim categoriesTable As Table = groupingGrid1.GetTable("Categories")
    Console.WriteLine(categoriesTable.ToString())
    Dim productsTable As Table = categoriesTable.RelatedTables("Products")
    Console.WriteLine(productsTable.ToString())
    Dim product1 As ChildTable = CType(productsTable.TopLevelGroup.Groups("1"), ChildTable)
    Console.WriteLine(product1.ToString())
    Console.WriteLine(product1.Records(0).ToString())
    Dim product21 As ChildTable = CType(productsTable.TopLevelGroup.Groups("8"), ChildTable)
    Console.WriteLine(product21.ToString())
    Console.WriteLine(product21.Records(0).ToString())
End Sub 'New

FindGroup(Object[])

Searches for the specified category and returns the zero-based index of the occurrence.

Declaration

public int FindGroup(object[] categoryKeys)

Parameters

Type	Name	Description
System.Object[]	categoryKeys	The array of objects that identify the category.

Returns

Type	Description
System.Int32	Returns the zero-based index of the occurrence.

Remarks

The method ensures that the collection is in sync with the underlying table if changes have been made to the Table or the TableDescriptor.

The method calls EnsureInitialized(Object, Boolean).

FindHighestSmallerOrEqualKey(Object)

Returns the group that matches the category or the nearest group with a category key that is smaller than the specified category key.

Declaration

public Group FindHighestSmallerOrEqualKey(object category)

Parameters

Type	Name	Description
System.Object	category	The category key.

Returns

Type	Description
Group	The zero-based index of the occurrence of the category within the entire GroupsInDetailsCollection, if found; otherwise, -1.

FindLowestHigherOrEqualKey(Object)

Returns the group that matches the category or the nearest group with a category key that is higher than the specified category key.

Declaration

public Group FindLowestHigherOrEqualKey(object category)

Parameters

Type	Name	Description
System.Object	category	The category key.

Returns

Type	Description
Group	The zero-based index of the occurrence of the category within the entire GroupsInDetailsCollection, if found; otherwise, -1.

GetEnumerator()

Returns an enumerator for the entire collection.

Declaration

public GroupsInDetailsCollectionEnumerator GetEnumerator()

Returns

Type	Description
GroupsInDetailsCollectionEnumerator	An Enumerator for the entire collection.

Remarks

Enumerators only allow reading the data in the collection. Enumerators cannot be used to modify the underlying collection.

IndexOf(Group)

Returns the zero-based index of the occurrence of the element in the collection.

Declaration

public int IndexOf(Group value)

Parameters

Type	Name	Description
Group	value	The element to locate in the collection. The value can be a NULL reference (Nothing in Visual Basic).

Returns

Type	Description
System.Int32	The zero-based index of the occurrence of the element within the entire collection, if found; otherwise, -1.

Remarks

The method ensures that the collection is in sync with the underlying table if changes have been made to the Table or the TableDescriptor.

The method calls EnsureInitialized(Object, Boolean).

IndexOf(String)

Searches for the specified category and returns the zero-based index of the occurrence or -1 if not found.

Declaration

public int IndexOf(string category)

Parameters

Type	Name	Description
System.String	category	Category key.

Returns

Type	Description
System.Int32	Returns the zero-based index of the occurrence.

Remarks

The method ensures that the collection is in sync with the underlying table if changes have been made to the Table or the TableDescriptor.

The method calls EnsureInitialized(Object, Boolean).

Remove(Group)

Removes the group.

Declaration

public void Remove(Group value)

Parameters

Type	Name	Description
Group	value	Group to remove.

Explicit Interface Implementations

ICollection.CopyTo(Array, Int32)

Copies the entire collection to a compatible one-dimensional Array, starting at the specified index of the target array.

Declaration

void ICollection.CopyTo(Array array, int index)

Parameters

Type	Name	Description
System.Array	array	The one-dimensional Array that is the destination of the elements copied from ArrayList. The Array must have zero-based indexing.
System.Int32	index	The zero-based index in array at which copying begins.

Remarks

The method ensures that the collection is in sync with the underlying table if changes have been made to the Table or the TableDescriptor.

The method calls EnsureInitialized(Object, Boolean).

ICollection.SyncRoot

Returns whether collection of rows can be synchronized.

Declaration

object ICollection.SyncRoot { get; }

Returns

Type
System.Object

IEnumerable.GetEnumerator()

Returns an enumerator for the entire collection.

Declaration

IEnumerator IEnumerable.GetEnumerator()

Returns

Type	Description
System.Collections.IEnumerator	An Enumerator for the entire collection.

Remarks

Enumerators only allow reading the data in the collection. Enumerators cannot be used to modify the underlying collection.

The method ensures that the collection is in sync with the underlying table if changes have been made to the Table or the TableDescriptor.

The method calls EnsureInitialized(Object, Boolean).

IList.Add(Object)

Adds the value to the collection.

Declaration

int IList.Add(object value)

Parameters

Type	Name	Description
System.Object	value	The value in the list.

Returns

Type
System.Int32

Exceptions

Type	Condition
System.InvalidOperationException	Collection is Read-only.

IList.Clear()

Clears the Collection.

Declaration

void IList.Clear()

Exceptions

Type	Condition
System.InvalidOperationException	Collection is Read-only.

IList.Contains(Object)

Checks whether the value is in the collection or not.

Declaration

bool IList.Contains(object value)

Parameters

Type	Name	Description
System.Object	value	The value of an element in the list.

Returns

Type
System.Boolean

IList.get_Item(Int32)

Declaration

object IList.get_Item(int index)

Parameters

Type	Name	Description
System.Int32	index

Returns

Type
System.Object

IList.IndexOf(Object)

Returns the index of value from the collection.

Declaration

int IList.IndexOf(object value)

Parameters

Type	Name	Description
System.Object	value	The value of an element in the list.

Returns

Type
System.Int32

IList.Insert(Int32, Object)

Inserts the value at the specified index.

Declaration

void IList.Insert(int index, object value)

Parameters

Type	Name	Description
System.Int32	index	The index of the list.
System.Object	value	The value of an element in the list.

Exceptions

Type	Condition
System.InvalidOperationException	Collection is Read-only.

IList.Item[Int32]

Gets or sets the current index in an collection.

Declaration

object IList.this[] { get; set; }

Parameters

Type	Name	Description
System.Int32	index	The index of current element in an collection.

Returns

Type	Description
System.Object	Returns the selected cells information at the specified index.

Exceptions

Type	Condition
System.InvalidOperationException	Since Collection is read only, index value cannot be set.

IList.Remove(Object)

Removes the value passed from the collection.

Declaration

void IList.Remove(object value)

Parameters

Type	Name	Description
System.Object	value	The value of an element in the list.

IList.RemoveAt(Int32)

Removes the value at specified index of the collection.

Declaration

void IList.RemoveAt(int index)

Parameters

Type	Name	Description
System.Int32	index	The index of the list.

Exceptions

Type	Condition
System.InvalidOperationException	Collection is Read-only.

IList.set_Item(Int32, Object)

Declaration

void IList.set_Item(int index, object value)

Parameters

Type	Name	Description
System.Int32	index
System.Object	value

Implements

System.Collections.IList

System.Collections.ICollection

System.Collections.IEnumerable

System.IDisposable

Extension Methods

EnumerableExtensions.GetElementType(IEnumerable)

EnumerableExtensions.GetItemPropertyInfo(IEnumerable)

FunctionalExtensions.ForEach<T>(IEnumerable, Action<T>)

FunctionalExtensions.ToList<T>(IEnumerable)

FunctionalExtensions.MoveTo(IList, Int32, Int32)

QueryableExtensions.OfQueryable(IEnumerable)

QueryableExtensions.OfQueryable(IEnumerable, Type)

QueryableExtensions.GroupByMany<TElement>(IEnumerable, Type, List<Func<TElement, Object>>)

QueryableExtensions.GroupByMany(IEnumerable, Type, Func<String, Expression>, String[])

QueryableExtensions.GroupByMany(IEnumerable, Type, List<SortDescriptor>, Dictionary<String, IComparer<Object>>, Func<String, Expression>, String[])

QueryableExtensions.GroupByMany(IEnumerable, Type, List<SortDescriptor>, Func<String, Expression>, String[])