Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

Send parameters to method from markup to code behind

Posted on 2010-09-23
2
Medium Priority
?
564 Views
Last Modified: 2012-05-10
Hi Everyone,

I have an image button nested inside a datalist control.  When user clicks the image button, I want to run a method from my code behind.  In my Image Button markup I have this:
OnClick='<%# "ShowDetail(" & Cstr(Eval("ID")) & ")" %>'
This does not work and I am not sure why. This code produces thie error:
Microsoft jscript runtime error: Object Expected

What I do know is that when I call the method without arguments, like this:
OnClick='ShowDetail"
I have no problem.  But, I need to send the argument.  

Any help is greatly appreciated

Thanks

Jay
0
Comment
Question by:jwoodhams
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 
LVL 33

Accepted Solution

by:
Todd Gerbert earned 2000 total points
ID: 33744956
The OnClick event is defined by the image button and the method this parameter points to must accept two parameters, an Object and an ImageClickEventArgs - you don't have any choice in that matter.
What you probably want to do is have a ImageButton_Click(sender As Object, e As ImageClickEventArgs) method assigned to OnClick, and in that method you can call ShowDetail however you like.  You could assign <%# Eval("ID") %> to the CommandArgument of the ImageButton and then retrieve it in the Click event handler.

<%@ Page Language="VB" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">

	Protected Sub ImabeButton1_Click(ByVal sender As Object, ByVal e As System.Web.UI.ImageClickEventArgs)
		Dim ib As ImageButton = DirectCast(sender, ImageButton)
		ShowDetail(ib.CommandArgument)
	End Sub
	
	Private Sub ShowDetail(ByVal ID As Integer)
		'Do whatever you like here
	End Sub
</script>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
		<asp:ImageButton ID="ImabeButton1" runat="server" CommandArgument="<%# Eval("ID") %>" 
			onclick="ImabeButton1_Click" />
    </div>
    </form>
</body>
</html>

Open in new window

0
 
LVL 1

Author Closing Comment

by:jwoodhams
ID: 33746025
Thanks so much for the suggestion.  It worked perfectly.  Thanks.
0

Featured Post

Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

One of the pain points with developing AJAX, JavaScript, JQuery, and other client-side behaviors is that JavaScript doesn’t allow for cross domain request for pulling content. For example, JavaScript code on www.johnchapman.name could not pull conte…
IntroductionWhile developing web applications, a single page might contain many regions and each region might contain many number of controls with the capability to perform  postback. Many times you might need to perform some action on an ASP.NET po…
This tutorial will teach you the special effect of super speed similar to the fictional character Wally West aka "The Flash" After Shake : http://www.videocopilot.net/presets/after_shake/ All lightning effects with instructions : http://www.mediaf…
How to fix incompatible JVM issue while installing Eclipse While installing Eclipse in windows, got one error like above and unable to proceed with the installation. This video describes how to successfully install Eclipse. How to solve incompa…

721 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question