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ControlCollection.Add Method

Adds the specified Control object to the collection.

Namespace:  System.Web.UI
Assembly:  System.Web (in System.Web.dll)

'Declaration
Public Overridable Sub Add ( _
	child As Control _
)

Parameters

child
Type: System.Web.UI.Control

The Control to add to the collection.

ExceptionCondition
ArgumentNullException

Thrown if the child parameter does not specify a control.

HttpException

Thrown if the ControlCollection is read-only.

The new control is added to the end of an ordinal index array. The control can be an instance of any ASP.NET server control, a custom server control you create, or a literal control.

To add a control to the collection at a specific index location, use the AddAt method.

The following code example uses the Add method to add a series of template items, the number of which are taken from the server control's view state, to a custom templated control.

' Override to create repeated items. 
Protected Overrides Sub CreateChildControls()
    Dim O As Object = ViewState("NumItems")
    If Not (O Is Nothing)
       ' Clear any existing child controls.
       Controls.Clear()

       Dim I As Integer 
       Dim NumItems As Integer = CInt(O)
       For I = 0 To NumItems - 1
          ' Create an item. 
          Dim Item As RepeaterItemVB = New RepeaterItemVB(I, Nothing)
          ' Initialize the item from the template.
          ItemTemplate.InstantiateIn(Item)
          ' Add the item to the ControlCollection.
          Controls.Add(Item)
       Next 
    End If 
End Sub

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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