title: Listbox selectedIndexChanged doesn't fire when selecting an item from the list
body: <p>I have a listbox that needs to be populated by directories. 
  i have successfully filled the listbox with the Directories but my problem is i can't get the selected item's value. i placed a breakpoint on the SelectedIndexChanged event but my web application doesn't seem to run through that code.</p>
  
  <p>Here is my code for populating the listbox:</p>
  
  <pre><code>        lstDirectories.DataSource = dtDirectories;
          lstDirectories.DataValueField = "DirectoryID";
          lstDirectories.DataTextField = "DirectoryName";
          lstDirectories.DataBind();
  </code></pre>
  
  <p>This is how i get value from the listbox on the SelectedIndexChanged Event:</p>
  
  <pre><code>        TextBox1.Text = lstDirectories.SelectedItem.Value.ToString();
  </code></pre>
  
  <p>am i doing something wrong here? thanks for the help! :)</p>