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POasp.net my list is disappearing on postback - can't find what I'm missing?
 

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  1. POasp.net my list is disappearing on postback - can't find what I'm missing?
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    <p>This is probably an easy one, but I can't figure it out. argh...</p> <p>C# asp.net application with a custom user control. My custom control is a simple list of images wrapped in a link to be used as a navigation tool for the parent page.</p> <p>When I click a link, it does a postback: my click event does not seem to fire, and when the page reloads, the list of images disappears.</p> <p>I have <code>EnableViewState="true"</code> in both the parent page and the custom control. It is my understanding that this would be enough to preserve my list of options? If I reload the list each time and rebind my event handler, I would think then that the event would be lost, correct?</p> <p>Here is (abbreviated code) where I add the controls to my panel. </p> <pre><code> public void LoadMediaOptions() { loop through a datareader { LinkButton b = new LinkButton(); b.Click += new EventHandler(navOption_Click); b.Attributes.Add("mediaID", mediaID.ToString()); HtmlImage i = new HtmlImage(); i.Src = strThumbLink; i.Width = 120; i.Height = 90; b.Controls.Add(i); _loadedMediaHtml.Add(b); panMediaOptions.Controls.Add(b); } } </code></pre> <p>This method is currently only being called once in the parent page in the Page_Load method:</p> <pre><code>protected void Page_Load(object sender, EventArgs e) { try { if (!Page.IsPostBack) uxMediaNav.LoadMediaOptions(); } catch (Exception ex) { throw ex; } } </code></pre> <p>After the page posts-back, there are no media options loaded for me. My understanding of the EnableViewState is that it would preserve the elements I have loaded dynamically, but this is not the case.</p>
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    1. USgdbj
    1. USgdbj
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    1. COplease post your code... it'll really help us diagnose.
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      1. POasp.net my list is disappearing on postback - can't find what I'm missing?
      1. USChase Florell
    2. COdone. As a lark, actually, I just took the LoadMediaOptions() method outside of the conditional, and my code works as expected, with the media options loading correctly, but more importantly so does the event handler, which I totally don't understand. If the media options are cleared, and then have to be loaded manually each time, including rebinding the event handler, then how does the server figure out how to call the event?
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      1. POasp.net my list is disappearing on postback - can't find what I'm missing?
      1. USgdbj
 

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