Howto:? validate comboboxext on selectionchange committed

[Peter]

How can i validate the combobox from the SelectionChangeCommitted event without the validating event being called twice.

TIA,

Peter

[Arun Srinivasan]

Hi Peter,

We were unable to reproduce the behaviour you state above. Can you post information on how we can reproduce what you are encountering so that we can take a look

Regards,
Arun

[Peter]

private void comboBoxExt1_Validating(object sender, System.ComponentModel.CancelEventArgs e)
{
// Logic code here
// This code will get executed on the selection changed event if the user selected an item and during the validating event
}

private void comboBoxExt1_SelectionChangeCommitted(object sender, System.EventArgs e)
{
// check: is custom
if (listControl1.SelectedIndex == -1)
return;

// validate
this.comboBoxExt1_Validating(sender, null);
}

[Arun Srinivasan]

Hi Peter,

Thanks for the update. Validating will be called whenever the control loses focus and I guess that is what you are referring to when you say that it is called twice as it is called in your SelectionChangeCommitted event.

You could overcome this by setting a boolean flag and toggle it's value in your validation logic of both SelectionChangeCommitted and Validating events to ensure that it is called only once.

Regards,
Arun