Tag Archives: ComboBox

Using SelectionChangeCommitted event of ComboBox

12 May

If you want to capture changes in ComboBox you can use ‘SelectedIndexChanged’ or ‘SelectedValueChanged’ events. However, if you want to get changes only when the user changes the selection, use ‘SelectionChangeCommitted’ event instead.

SelectionChangeCommitted occurs only when the ComboBox selection changes by user (via keyboard or mouse) and it is not raised when the selection changes programmatically.

private void comboBox1_SelectionChangeCommitted(object sender, EventArgs e)
    if (comboBox1.SelectedIndex == 1)
        //do something...

DataBound ComboBox Problem

3 Feb

When you want to use a data bound ComboBox in .NET (C#, VB, etc), you should set a few properties such as DataSource, DisplayMember and ValueMember.
It works fine unless you want to set SelectedValue for the first time. It won’t be set!

I found that BindingContext property must be created before initializing SelectedValue:

ComboBox1.BindingContext = new BindingContext();
ComboBox1.DataSource = MyDataSet.DefaultView
ComboBox1.DisplayMember = "Title";
ComboBox1.ValueMember = "Code";
ComboBox1.SelectedValue = 1;
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