I have a ComboBox with an integer list as its data source. The list contains integers from 0 up to 255. When I select a value by means of the mouse from the drop-down list, the event fires. When on the other hand I write a value into the ComboBox, the event does not fire. The event SelectionChangeCommitted does not fire in both cases. Please I need an explanation. Thank you in advance.
You can create this event using the code snippet below:
public event IndexChangeHandler IndexChanged;
public delegate void IndexChangeHandler (object s);
private void button4_Click(object sender, EventArgs e)
{
Task.Run(() =>
{
int temp = 0;
while (true)
{
System.Threading.Thread.Sleep(2000);
comboBox1.BeginInvoke((MethodInvoker)delegate
{
if (comboBox1.Items.Count != temp)
{
IndexChanged(this);
temp= comboBox1.Items.Count;
}
});
}
});
IndexChanged += Form1_IndexChanged;
for (int i = 0; i < 5; i++)
{
comboBox1.Items.Add(i);
}
}
private void Form1_IndexChanged(object s)
{
MessageBox.Show("Test");
}
I defined the event form inside this example, you can use it in a separate class. Good Luck
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