ComboBox SelectedIndex = -1 not working

[ScottO]

I would like the user to have to select something in a
System.Windows.Forms.ComboBox.

private void MyForm_Load(object sender, System.EventArgs e)
{
...
comboBox.DataSource = data;
comboBox.SelectedIndex = -1;
...
}

Above code does work.

Any thoughts?

 

[Patrick Steele [MVP]]

I would like the user to have to select something in a
System.Windows.Forms.ComboBox.

private void MyForm_Load(object sender, System.EventArgs e)
{
...
comboBox.DataSource = data;
comboBox.SelectedIndex = -1;
...
}

Above code does work.

Working code? Usually people post here when they have problems with
non-working code.

I'm not clear on what the "problem" is. Are you saying you don't want
"-1" to clear the list?

 

[Stoitcho Goutsev \(100\) [C# MVP]]

Hi Scott,

Instead of
comboBox.SelectedIndex = -1;

try using
comboBox.SelectedItem = null;

 

[ScottO]

Everyone,

Thanks for the responses.

It was exactly what you mentioned. SelectedIndexChanged event to fire twice
and code some code behind effecting it.

Welcome me to the world of Component programming and Event Handlers.