ListControlDataBindingHandler Class
Performs data binding of a ListControl Web server control within a visual designer.
System.Web.UI.Design.DataBindingHandler
System.Web.UI.Design.WebControls.ListControlDataBindingHandler
Assembly: System.Design (in System.Design.dll)
The ListControlDataBindingHandler type exposes the following members.
| Name | Description | |
|---|---|---|
![]() | ListControlDataBindingHandler | Infrastructure. Initializes a new instance of the ListControlDataBindingHandler class. |
| Name | Description | |
|---|---|---|
![]() | DataBindControl | Performs data binding on the specified control. (Overrides DataBindingHandler.DataBindControl(IDesignerHost, Control).) |
![]() | Equals(Object) | Determines whether the specified Object is equal to the current Object. (Inherited from Object.) |
![]() | Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.) |
![]() | GetHashCode | Serves as a hash function for a particular type. (Inherited from Object.) |
![]() | GetType | Gets the Type of the current instance. (Inherited from Object.) |
![]() | MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
![]() | ToString | Returns a string that represents the current object. (Inherited from Object.) |
The ListControlDataBindingHandler class performs design-time data binding of a ListControl control. The ListControlDataBindingHandler class is referenced by the ListControl using the DataBindingHandlerAttribute class.
The DataBindControl method performs the design-time data binding.
This section contains two code examples. The first one demonstrates how to derive a control from the RadioButtonList control and associate it with its data binding handler. The second one demonstrates how to the derive a class from the ListControlDataBindingHandler class.
The following code example shows how to derive the SimpleRadioButtonList control from the RadioButtonList control, and then apply the DataBindingHandlerAttribute attribute to associate the SimpleRadioButtonList control with its data binding handler, the SimpleRadioButtonListDataBindingHandler class.
Imports System.Web Imports System.Web.UI Imports System.Web.UI.WebControls Imports System.ComponentModel Imports System.Security.Permissions Namespace Examples.VB.WebControls.Design ' The SimpleRadioButtonList is a copy of the RadioButtonList. ' It uses the SimpleRadioButtonListDesigner for design-time support. <AspNetHostingPermission(SecurityAction.Demand, _ Level:=AspNetHostingPermissionLevel.Minimal)> _ <AspNetHostingPermission(SecurityAction.InheritanceDemand, _ Level:=AspNetHostingPermissionLevel.Minimal)> _ <DesignerAttribute(GetType(Examples.VB.WebControls.Design. _ SimpleRadioButtonListDesigner))> _ <DataBindingHandler(GetType(Examples.VB.WebControls.Design. _ SimpleRadioButtonListDataBindingHandler))> _ Public Class SimpleRadioButtonList Inherits RadioButtonList End Class ' SimpleRadioButtonList End Namespace ' Examples.VB.WebControls.Design
The following code example shows how to derive the SimpleRadioButtonListDataBindingHandler class from the ListControlDataBindingHandler class. It overrides the DataBindControl method to add a message to the associated SimpleRadioButtonList control when that control is data bound.
' Imports System.Design Imports System Imports System.ComponentModel Imports System.ComponentModel.Design Imports System.Web.UI Imports System.Web.UI.Design.WebControls Namespace Examples.VB.WebControls.Design ' Derive the SimpleRadioButtonListDataBindingHandler. Public Class SimpleRadioButtonListDataBindingHandler Inherits ListControlDataBindingHandler ' Override the DataBindControl. Public Overrides Sub DataBindControl( _ ByVal designerHost As IDesignerHost, _ ByVal control As Control) ' Create a reference, named dataSourceBinding, ' to the control's DataSource binding. Dim dataSourceBinding As DataBinding _ = CType( _ control, _ IDataBindingsAccessor).DataBindings("DataSource") ' If the binding exists, create a reference to the ' list control, clear its ListItemCollection, and then add ' an item to the collection. If Not (dataSourceBinding Is Nothing) Then Dim simpleControl As SimpleRadioButtonList = _ CType(control, SimpleRadioButtonList) simpleControl.Items.Clear() simpleControl.Items.Add("Data-bound Radio Button.") End If End Sub ' DataBindControl End Class ' SimpleRadioButtonListDataBindingHandler End Namespace ' Examples.VB.WebControls.Design
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
