Combo Box Size Issue After All Items Are Removed

Question

My application contains a ComboBox that the user can delete items from. When the program starts up it populates the ComboBox from a list of strings read in from a configurat

Answer 1

To clear your combo box you can add this:

if (versionComboBox.Items.Count == 0)
{
    versionComboBox.Text = string.Empty;
    versionComboBox.Items.Clear();
    versionComboBox.SelectedIndex = -1;
}

Another approach is to manipulate the items in the data source and rebind the control each time (a lot less for you to worry about).

Answer 2

Try to use this at the end of your code when you are filling the combobox items:

comboBoxNumTreno.IntegralHeight = true; // auto fit dropdown list

Then to clear it up:

comboBoxNumTreno.ResetText();
comboBoxNumTreno.Items.Clear();
comboBoxNumTreno.SelectedIndex = -1;
comboBoxNumTreno.DropDownHeight = 106; // default value
comboBoxNumTreno.IntegralHeight = false; 

Answer 3

I know this is an old post, but it took me a long time to figure this out and I wanted to let anyone in the future know. After you clear your combo box just do a blank add items and it resets the height.

comboBox1.Items.Clear();
comboBox1.Items.Add("");

Answer 4

set DropDownHeight property to fix size

 versionComboBox.DropDownHeight = 106; // default value