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Howto:? validate comboboxext on selectionchange committed

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7768 Oct 8,2003 10:11 PM Oct 10,2003 03:49 PM Windows Forms 3
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Peter
Asked On October 8, 2003 10:11 PM

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

Arun Srinivasan [Syncfusion]
Replied On October 9, 2003 01:06 PM

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
Replied On October 10, 2003 10:40 AM

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 [Syncfusion]
Replied On October 10, 2003 03:49 PM

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

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