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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!";
    }
  }
}

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

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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