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Page.GetPostBackEventReference Method (Control)

NOTE: This method 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 object.

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
)
/** @attribute ObsoleteAttribute("The recommended alternative is ClientScript.GetPostBackEventReference. http://go.microsoft.com/fwlink/?linkid=14202") */ 
public String GetPostBackEventReference (
	Control control
)
ObsoleteAttribute("The recommended alternative is ClientScript.GetPostBackEventReference. http://go.microsoft.com/fwlink/?linkid=14202") 
public function GetPostBackEventReference (
	control : Control
) : String
Not applicable.

Parameters

control

The server control to process the postback on the server.

Return Value

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 MyControl1 : 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.
      public void RaisePostBackEvent(string eventArgument)
      {
        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) + "\">Increase Number</a>");
      }
   }

public class MyControl1 extends 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.
    /** @property 
     */
    public int get_Number()
    {
        if (get_ViewState().get_Item("Number") != null) {
            return System.Convert.ToInt32(get_ViewState().get_Item("Number"));
        }
        return 50;
    } //get_Number

    /** @property 
     */
    public void set_Number(int value)
    {
        get_ViewState().set_Item("Number", (Int32)value);
    } //set_Number

    // Implement the RaisePostBackEvent method from the
    // IPostBackEventHandler interface. If 'inc' is passed
    // to this method, it increases the Number property by one.
    public void RaisePostBackEvent(String eventArgument)
    {
        set_Number(get_Number() + 1);
    } //RaisePostBackEvent

    protected void Render(HtmlTextWriter writer)
    {
        // Converts the Number property to a string and
        // writes it to the containing page.
        writer.Write("The Number is " + ((Int32)get_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:" + get_Page().
            GetPostBackEventReference(this) + "\">Increase Number</a>");
    } //Render
} //MyControl1

Windows 98, Windows Server 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 1.0, 1.1, 2.0
Obsolete (compiler warning) in 3.0

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