ComboBox.Items.Clear() not working correctly with .SelectedIndex = -1

[Shaitan00]

--Using [VS C#.NET]--

 

This is really odd, I have a Method that is made to Refresh my GUI (clear my Combobox, re-populated them, and set the indexes back to -1). How I have noticed that after using the combobox.Items.Clear() my .SelectedIndex = -1 doesn't work.

 

Given a Combobox [cb]

 

cb.Items.Clear();

foreach (DataRow dr in ds.Tables[0].Rows)

{

cb.Items.Add(diInfo);

}

cb.SelectedIndex = -1;

 

The 1st time my code runs it is perfect, however whenever I refresh (run this section again) the .Clear and .Add work (I have tested that it refreshes) however the cb.SelectedIndex = -1 does not work anymore, the last select item is still in he combobox. Any clues/ideas? Thanks,

[DiverDan]

That is weird, after clearing the items in the combobox setting the selected index to - 1 should do nothing.

 

Try removing the cb.SelectedIndex = -1;

[HJB417]

1) After invoking cb.Items.Clear(), make sure cb.Items.Count is 0.

2) What's diInfo? You iterate through the rows, but add the same object reference to the ComboBox.

3) Setting SelectedIndex to -1 just deselects. It doesn't remove any items.