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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)

[ObsoleteAttribute("The recommended alternative is ClientScript.GetPostBackEventReference. http://go.microsoft.com/fwlink/?linkid=14202")]
public string GetPostBackEventReference(
	Control control,
	string argument
)

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 : Control, 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 int Number
      {
        get
        {
          if ( ViewState["Number"] !=null )
             return (int) ViewState["Number"];
          return 50;
        }

        set
        {
          ViewState["Number"] = value;
        }        
      }

      // 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. 
      public void RaisePostBackEvent(string eventArgument)
      {
        if ( eventArgument == "inc" )
        Number = Number + 1;

        if ( eventArgument == "dec" )
        Number = Number - 1;
      }


[System.Security.Permissions.PermissionSet(System.Security.Permissions.SecurityAction.Demand, Name="FullTrust")]
      protected override void Render(HtmlTextWriter writer)
      {
        // 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(this,"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(this,"dec") + "\">Decrease Number</a>");
      }
   }

.NET Framework

Supported in: 1.1
Obsolete (compiler warning) in 4.6
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
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