Bonnie,
Currently this is the code I have in the form's constructor, to add 3 elements to the collection.

try
			{
				this.oIndividualDelayCollection.Add(new ALS.ImageviewConfig.IndividualDelay(1,5));
				this.oIndividualDelayCollection.Add(new ALS.ImageviewConfig.IndividualDelay(2,45));
				this.oIndividualDelayCollection.Add(new ALS.ImageviewConfig.IndividualDelay(42,42));
				this.lstIndividualDelay.DataSource = this.oIndividualDelayCollection;
				this.lstIndividualDelay.SelectedIndex = 0;
				
			}
			catch (Exception ex)
			{
				MessageBox.Show(ex.ToString());
			}

This is mostly test code at this point. I will in the future populate the collection by reading through an aspx file.

Here is the code in the listbox' selectedindexchanged:

private void lstIndividualDelay_SelectedIndexChanged(object sender, System.EventArgs e)
		{
			this.txtIncludeDelay.Text = this.oIndividualDelayCollection[this.lstIndividualDelay.SelectedIndex].IncludeDelay.ToString();
			this.txtIncludeFile.Text = this.oIndividualDelayCollection[this.lstIndividualDelay.SelectedIndex].IncludeFile.ToString();

		}

All this code does is display the contents of the collection element in two textboxes.

Then I added a button, who's click does the following:

this.lstIndividualDelay.DataSource = null;
			this.oIndividualDelayCollection.Add(new ALS.ImageviewConfig.IndividualDelay(1,10));
			
			this.lstIndividualDelay.DataSource = this.oIndividualDelayCollection;

When I run the app and click the button the listbox does not update (no new item added), but when I click where the new item should be the information is displayed in the textboxes. Also if I click one of the elements I can see the textboxes are updated but the blue highlight is not changed.

Any thoughts?

Einar

PS. Thank you very much for taking the time to look at this.



>So, let's see your other code ... the code where you add something to the collection and reset the ListBox DataSource. Also, if you have any code in the ListBox.SelectedIndexChanged() event handler.
>
>~~Bonnie
>
>
>>Bonnie,
>>I still can not get it to "refresh" even when setting the SataSource to null and then setting it back to my collection. I can see through the debugger that the values in the collection has changed. Something even more strange happend once I made the code change, the selected index in the listbox does not appear to change, i.e. the blue hightlighted row does not change, but the selectedindexchanged even fires. Very odd. I am starting to think that I might use a datatable instead <s>, but before I do I would still like to figure this out.
>>Below is the code for the class and for the collection class. Please feel free to comment on both.