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Button.IPostBackEventHandler.RaisePostBackEvent Method

Raises events for the Button control when it posts back to the server.

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

void IPostBackEventHandler.RaisePostBackEvent(
	string eventArgument
)

Parameters

eventArgument
Type: System.String

The argument for the event.

Implements

IPostBackEventHandler.RaisePostBackEvent(String)

This event is used internally by the Button control, when it is clicked, to raise a Click event, and if defined, a Command event.

The following code example demonstrates how to override the IPostBackEventHandler.RaisePostBackEvent method so that it always raises the OnClick event in a custom Button control.

namespace Samples.AspNet.CS.Controls
{
  [System.Security.Permissions.PermissionSet(System.Security.Permissions.SecurityAction.Demand, Name="FullTrust")]
  public class CustomButtonRaisePostBackEvent : System.Web.UI.WebControls.Button, System.Web.UI.IPostBackEventHandler
  {
    private string message = System.String.Empty;

    protected override void Render(System.Web.UI.HtmlTextWriter writer) 
    {
      // Render a HTML submit button.
      writer.Write("<INPUT TYPE='submit' name='" + this.UniqueID + "' value='Click Me' />"); 
      writer.Write("<BR>" + message);
    }

    // Re-implement the IPostBackEventHandler's RaisePostBackEvent method. 
    // Note: C# allows this, where VB.NET does not. 
    public void RaisePostBackEvent(System.String eventArgument)
    {
      // Raise the Click event of the custom Button web control.
      OnClick(new System.EventArgs());

      // Don't call the Page.Validate or OnCommand events, 
      // which the base IPostBackEventHandler's RaisePostBackEvent method does.
    }

    protected override void OnClick(System.EventArgs e)
    {
      message = "RaisePostBackEvent method successful!";
    }
  }
}

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0
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