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ComboBox issues in .Net 2008 C# Windows Forms application

Posted on 2012-03-20
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Last Modified: 2012-03-20
I have a simple combobox that is populated using a dataset which gets data from a SQL server. This combobox (cmb1) is populated during the form's Load event

On the cmb1_SelectedIndexChanged event, I have another combobox (cmb2) populating based on the cmb1's value.

Problem is, whe the form loads, the second combo box is getting populated with the first element in cmb1. I need cmb2 to remain blank until the user selects something in cmb1.
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Question by:CodeWrangler
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Accepted Solution

by:
käµfm³d   👽 earned 500 total points
ID: 37745091
Have you tried checking that something is selected:

protected void cmb1_SelectedIndexChanged(object sender, EventArgs e)
{
    if (cmb1.SelectedIndex >= 0)
    {
        // Load cmd2
    }
}

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Author Comment

by:CodeWrangler
ID: 37745107
Yep, thats is exactly what I am doing. As a temporary workaround, I am putting something in index 0 which I know will not return results from the database.
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Author Comment

by:CodeWrangler
ID: 37745191
Figured it out. Thanks Kaufmed. Even though you suggested something I had already tried, it got me thinking on something I did incorrectly.
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Author Comment

by:CodeWrangler
ID: 37745408
In case someone wanders in here for any combobox issues.. if you are wondering why the _SelectedIndexChanged event is firing when trying to populate comboxes using SQL.. use:

if (cmbKey2.SelectedIndex > -1 && cmbKey2.ContainsFocus == true)
            {....}
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