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copied!<p>How do I use the <code>ListView</code>'s <code>ItemSelectionChanged</code> event? I have a <code>ListView</code>, which in turn has 8 columns; and the first column of each row contains the Id for the row and this is what I'm after.</p> <p>I need this because the Id is to be used to select info from a list. This list is what populates the <code>ListView</code>, but it doesn't show all of the info. The info not being shown is to be displayed in a <code>RichTextBox</code> and, of course, it should display the info for that selected item in the <code>ListView</code>. The Id's are the same, of course, but no matter what I try I can't seem to reach that value.</p> <p>My code so far:</p> <pre><code>foreach ([ClassName] x in [List]) { if (x.id == Convert.ToInt32(myListView.FocusedItem.Text)) { rtbxSpecific.Text = x.name; } } </code></pre> <p>This works great for the first object in the <code>ListView</code>, but not for any of the following where it throws a <a href="http://msdn.microsoft.com/en-us/library/system.nullreferenceexception.aspx" rel="nofollow"><code>NullReferenceException</code></a>. Why does this happen? It's like the event fires, but it doesn't know about any other item in the list except for the first one.</p> <p>I've also tried using <code>selectedItems[0].Text</code>, <code>selectedItems[0].SubItems[0].Text</code> but it's basically the same fault. This is really annoying me and I would be really thankful if someone could explain why it works for the first <code>ListViewItem</code>, but not the following.</p> <p>I even tried using <code>Find(...)</code> on the list with:</p> <pre><code>[Class] cl = [List].Find(delegate([Class] q) {return q.id == Convert.ToInt32(myListView.FocusedItem.SubItems[0].Text);}); </code></pre> <p>But no dice, which leads me to believe its the <code>FocusedItem</code> that is being nasty right now and I'm not getting anywhere with this. The <code>Find(...)</code> method would be cleaner to use, I suppose, but right now I'm getting the same error with both.</p>

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