GetPostBackEventReference is used to raise postback from a control which has OnClick event associated with it. Meanwhile, GetPostBackClientHyperlink is used to raise post back from a control without OnClick event associated with it, such as HyperLink...
The following code example demonstrates the difference between GetPostBackEventReference and GetPostBackClientHyperlink method.
<%@ Page Language="C#" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <script runat="server"> public class MyControl : Label, IPostBackEventHandler { // Use the constructor to defined default label text. public MyControl() { base.Text = "No postback raised."; } // Implement the RaisePostBackEvent method from the // IPostBackEventHandler interface. public void RaisePostBackEvent(string eventArgument) { base.Text = "Postback handled by " + this.ID.ToString() + ". <br/>" + "Postback caused by " + eventArgument.ToString() + "."; } } protected void Page_Load(object sender, EventArgs e) { // Get a ClientScriptManager reference from the Page class. ClientScriptManager cs = Page.ClientScript; // Create an instance of the custom label control and // add it to the page. MyControl mycontrol = new MyControl(); mycontrol.ID = "mycontrol1"; PlaceHolder1.Controls.Add(mycontrol); PlaceHolder1.Controls.Add(new LiteralControl("<br/>")); // Create a button element with its onClick attribute defined // to create a postback event reference to the custom label control. HtmlInputButton b = new HtmlInputButton(); b.ID = "mybutton1"; b.Value = "Click"; b.Attributes.Add("onclick", cs.GetPostBackEventReference(mycontrol, b.ID.ToString())); PlaceHolder1.Controls.Add(b); PlaceHolder1.Controls.Add(new LiteralControl("<br/>")); // Create a link element with its href attribute defined // to create a postback event reference to the custom label control. HtmlAnchor a = new HtmlAnchor(); a.ID = "myanchor1"; a.InnerText = "link"; a.HRef = cs.GetPostBackClientHyperlink(mycontrol, a.ID.ToString()); PlaceHolder1.Controls.Add(a); } </script> <html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server"> <title>ClientScriptManager Example</title> </head> <body> <form id="form1" runat="server"> <div> <asp:PlaceHolder id="PlaceHolder1" runat="server"> </asp:PlaceHolder> </div> </form> </body> </html>
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