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Page.GetPostBackEventReference Method (Control, String)

Note: This API is now obsolete.

Returns a string that can be used in a client event to cause postback to the server. The reference string is defined by the specified control that handles the postback and a string argument of additional event information.

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

'Declaration
<ObsoleteAttribute("The recommended alternative is ClientScript.GetPostBackEventReference. http://go.microsoft.com/fwlink/?linkid=14202")> _
Public Function GetPostBackEventReference ( _
	control As Control, _
	argument As String _
) As String

Parameters

control
Type: System.Web.UI.Control

The server control to process the postback.

argument
Type: System.String

The parameter passed to the server control.

Return Value

Type: System.String
A string that, when treated as script on the client, initiates the postback.

This method has been deprecated. Use the GetPostBackEventReference method in the ClientScriptManager class instead.

   Public Class MyControl
      Inherits Control
      Implements IPostBackEventHandler

      ' Create an integer property that is displayed when 
      ' the page that contains this control is requested 
      ' and save it to the control's ViewState property.       
      Public Property Number() As Integer 
         Get 
            If Not (ViewState("Number") Is Nothing) Then 
               Return CInt(ViewState("Number"))
            End If 
            Return 50
         End Get 

         Set
            ViewState("Number") = value
         End Set 
      End Property       

      ' Implement the RaisePostBackEvent method from the 
      ' IPostBackEventHandler interface. If inc is passed 
      ' to this method, it increases the Number property by one. 
      ' If dec is passed to this method, it decreases the 
      ' Number property by one. 
      Sub RaisePostBackEvent(eventArgument As String) Implements IPostBackEventHandler.RaisePostBackEvent

         If eventArgument = "inc" Then
            Number = Number + 1
         End If  
         If eventArgument = "dec" Then
            Number = Number - 1
         End If 
      End Sub 'RaisePostBackEvent

      <System.Security.Permissions.PermissionSetAttribute(System.Security.Permissions.SecurityAction.Demand, Name:="FullTrust")> _ 
      Protected Overrides Sub Render(writer As HtmlTextWriter)
         ' Converts the Number property to a string and 
	 ' writes it to the containing page.
         writer.Write(("The Number is " + Number.ToString() + " ("))

	 ' Uses the GetPostBackEventReference method to pass 
	 ' inc to the RaisePostBackEvent method when the link 
	 ' this code creates is clicked.
         writer.Write(("<a href=""javascript:" + Page.GetPostBackEventReference(Me, "inc") + """>Increase Number</a>"))

         writer.Write(" or ")

	 ' Uses the GetPostBackEventReference method to pass 
	 ' dec to the RaisePostBackEvent method when the link 
	 ' this code creates is clicked.         
         writer.Write(("<a href=""javascript:" + Page.GetPostBackEventReference(Me, "dec") + """>Decrease Number</a>"))
      End Sub 'Render
   End Class 'MyControl

.NET Framework

Supported in: 1.1, 1.0
Obsolete (compiler warning) in 4.6
Obsolete (compiler warning) in 4.5
Obsolete (compiler warning) in 4.5.1
Obsolete (compiler warning) in 4.5.2
Obsolete (compiler warning) in 4
Obsolete (compiler warning) in 3.5
Obsolete (compiler warning) in 3.5 SP1
Obsolete (compiler warning) in 3.0
Obsolete (compiler warning) in 3.0 SP1
Obsolete (compiler warning) in 3.0 SP2
Obsolete (compiler warning) in 2.0
Obsolete (compiler warning) in 2.0 SP1
Obsolete (compiler warning) in 2.0 SP2

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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