Reset controls in update panel when error is thrown

Hello fellow developers,

A user enters a value in a textbox and i click a button to get some data, but a server error is thrown.

Is there a way to clear/reset the textbox in an UpdatePanel when there is a server error?

If there is a way, can someone assist in providing me that trick?

Thanks in Advance.

Protected Sub myButton_Click(ByVal senderAs Object,ByVal eAs System.EventArgs)Handles myButton.Click
Try
' Whatever code that I'm trying to run goes here.
' This is the code that my produce the error.
Catch
myTextbox.Text =""
End Try
End Sub

Can't you simply use a try/catch block, and catch the exception? If an exception is thrown reset it to the old value. You can use a hidden label or textbox to store the previous value.

Use this

protected void ScriptManager1_AsyncPostBackError(object sender, AsyncPostBackErrorEventArgs e)
{
if (condition)
{
ScriptManager1.AsyncPostBackErrorMessage =
e.Exception.Message;

}
else
{
ScriptManager1.AsyncPostBackErrorMessage =
"An unspecified error occurred.";
}
}

I apologize. My example scenario was not explained the way I originally thought.

The example should be that when using AJAX you want to show an error message AND reset the controls.

If you write code to 'Throw' a custom error message to an alert window, nothing after the 'Throw' gets executed (clearing my textbox).

So my question really should be:

Is there a way, using AJAX, to 'Throw' a custom error message to an alert window and still reset controls? Either on the server or client side.

Thanks.

Protected Sub myButton_Click(ByVal senderAs Object,ByVal eAs System.EventArgs)Handles myButton.Click
Try
' Whatever code that I'm trying to run goes here.
' This is the code that my produce the error.
Catch exAs Exception
ScriptManager.RegisterStartupScript(Page, Page.GetType,"ErrorMsg", "alert('" & ex.Message & "');",True)
myTextbox.Text =""
End Try
End Sub

Thanks Buddha, that's just what I needed.