webcontrol button with script attribute

[jewel]

how can I make the button_click to execute first before the script that I added in the buttons's attribute

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        'Put user code to initialize the page here
 
        Dim scriptOk As String
        scriptOk = "window.returnValue = true; " _
        & " window.dialogArguments.strName = window.document.all.MyFile.value; " _
        & " window.close();"
        btnOk.Attributes.Add("onclick", scriptOk)
        btnCancel.Attributes.Add("onclick", "window.returnValue = false;window.close();")
    End Sub
 
Private Sub btnOk_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnOk.Click
        'Response.Write("hello")
        'MyFile.PostedFile.SaveAs("")
 
    End Sub

myFile is an htmlinputfile server control, I want the file to be uploaded first before the web page execute the script to close the window

Thanks,

Jewel

[dj4uk]

You can't do what you are saying the method you suggest. The client-side onclick event will always fire before the page is Posted Back and the server-side click event is fired.

What you want to do is remove the client-side onclick event and add some code to the server-side event that uses the Page's RegisterStartupScript method.

This method executes client-side code as soon as the page reloads i.e. after your server-side Click event fires. It is used as below:

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        btnCancel.Attributes.Add("onclick", "window.returnValue = false; window.close();")
End Sub

Private Sub btnOk_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnOk.Click
        If MyFile.PostedFile.ContentLength > 0 Then
		'Response.Write("hello")
        	'MyFile.PostedFile.SaveAs("")
		RegisterStartupScript("image_uploaded", "window.returnValue = true; window.close();")
	End If
End Sub

The RegisterStartupScript has two arguments - the first is a unique key so it can be referenced in your code and the second is the client-side script you want to execute.

Let me know if you have any problems.

DJ