ASP.NET Dynamically Generated Linkbutton Click event not firing

Question

I have a panel with its visibility set to false. What I'm trying to do is dynamically create a LinkButton when my page is generated and have it so when I click the LinkButton, the panels' visibility gets set to true and it appears on my page.

I'm creating my LinkButton like so:

LinkButton _lb = new LinkButton();
_lb.Text = "Details";
_lb.Click += _lb_Click;

Here is the code for my LinkButton's Click event handlers:

protected void _lb_Click(object sender, EventArgs e)
{
      Panel1.Visible = true;
}

Whenever I render the page and click on the LinkButton, the event never fires. I can put a break point inside the event handler and it never gets reached. What am I missing?

EDIT:

I am adding the LinkButton to the page in a placeholder like so:

PlaceHolder1.Controls.Add(_lb);

EDIT2:

Thank you all for the replies so far. It seems like the problem is definitely to do with the lifecycle. To add details, the LinkButton is being created inside of a Timer_Tick event that is controlling the updating of an UpdatePanel. I don't know how to create the LinkButton in Page_Load and pass it to the Timer_Tick event. Any help?

How are you adding the linkbutton to the page, with just the code you have shown there will be nothing to click on. — Coding Flow
– Coding Flow, Commented Sep 17, 2014 at 14:54
Include the event handler which adds the LinkButton to the page. — Michael Liu
– Michael Liu, Commented Sep 17, 2014 at 14:56
Sorry for the confusion. I edited my post to show how the LinkButton is getting added. — gev125
– gev125, Commented Sep 17, 2014 at 14:59
Check the page lifecycle - if you're trying to add the button too late in the rendering process, it won't be there. — Tim
– Tim, Commented Sep 17, 2014 at 15:02
At least here, your code works correctly. I literally pasted your code to my project and the link is rendered and the breakpoint's hit when _lb_Click is clicked. I create the LinkButton in Page_Load. — Joe_Hendricks
– Joe_Hendricks, Commented Sep 17, 2014 at 15:03

Joe_Hendricks · Accepted Answer · 2014-09-17 15:12:18Z

3

Since you don't mention where it is, move your code to Page_Load:

protected void Page_Load(object sender, System.EventArgs e)
{
    LinkButton _lb = new LinkButton();
    _lb.Text = "Details";
    _lb.Click += _lb_Click;
    PlaceHolder1.Controls.Add(_lb);
}

edited Sep 17, 2014 at 15:12

answered Sep 17, 2014 at 15:02

Joe_Hendricks

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1 Comment

Joe_Hendricks Over a year ago

From the post, you mention that the LinkButton is being rendered, so I assume that the page is being rendered correctly. Have you tried just adding the event handler (ie. _lb.Click += _lb_Click;) in Page_Load?

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