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POMouseDown in WinForm ListBox Kills SelectedIndexChanged
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  1. POMouseDown in WinForm ListBox Kills SelectedIndexChanged
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    copied!<p>I'm writing some code to detect toggling of selections in a WindForms ListBox with MultiSelect turned on. Since SelectedIndexChanged only lets me see what is selected after the click, I was looking for a way to detect what was selected before the ListBox was clicked. I implemented the MouseDown event and I can get exactly what I want, but an unfortunate side effect is that I have killed the SelectedIndexChanged event. It will not fire.</p> <p>Is this known behavior? Are there any thoughts about getting to the selection list before the click?</p> <p>Thanks.</p> <p>Edited to include code snippets as requested.</p> <p>Designer generated events:</p> <pre><code>this.lbPhysicianClinic.SelectedIndexChanged += new System.EventHandler( this.lbPhysicianClinic_SelectedIndexChanged ); this.lbPhysicianClinic.MouseDown += new System.Windows.Forms.MouseEventHandler( this.lbPhysicianClinic_MouseDown ); </code></pre> <p>Code snippet showing MouseDown event:</p> <pre><code>private void lbPhysicianClinic_MouseDown( object sender, MouseEventArgs e ) { List&lt;Clinic_List_ByPhysicianResult&gt; Selected = this.PhysicianGetSelectedClinics( this.lbPhysicianClinic.SelectedIndices ); } </code></pre> <p>Code snippet showing SelectedIndexChanged event:</p> <pre><code>private void lbPhysicianClinic_SelectedIndexChanged( object sender, EventArgs e ) { try { if ( this.FormInitComplete &amp;&amp; this.RefreshUIComplete ) { List&lt;Clinic_List_ByPhysicianResult&gt; Selected = this.PhysicianGetSelectedClinics( this.lbPhysicianClinic.SelectedIndices ); Clinic_List_ByPhysicianResult DroppedClinic = new Clinic_List_ByPhysicianResult(); </code></pre> <p>I set a breakpoint in each event and if the MouseDown event is there, the SelectedIndexChanged event never fires. It only fires when the MouseDown event is gone.</p> <p>Hopefully this clarifies things.</p>
 

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