Hi Gregory,

I am heading out right now so I do not have enough time to prepare an isolated sample.  I do use a standard set of class methods to configure and populate all of my UltraComboboxes because they are re-used so many times throughout my application so there may be some conflicting setting in these general configuration methods.

Can you send me your sample so that I can compare my settings; maybe there is some other property of the UltraCombobox that I have set that is conflicting.

Thanks; Norm

Hi,

I have been able to verify the condition that causes the error.  My combo box has a GUID column in the data table that is the ValueMember.  The control is bound to a Guid column in the Data Set (Binding Source) for the form.  The Data Source Update Mode is set to OnPropertyChanged.

This is different from your sample application in that you sample is not bound to a data source in a database.

When the non-trappable error occurs, the text indicates "Guid should contain 32 digits with 4 dashes ..."

Thanks - Norm

Question relating to my findings:

Is there a way to set a default value that the control uses when the user types a value that is not in the list.  If there is, then I could set this property to an empty GUID to prevent the error from occurring and still use the property setting for Data Source Update Mode to "On Property Changed".

When the Data Source Update Mode is "OnValidation" then the system error for an invalid GUID value is not thrown and the ItemNotInList event is thrown.

The reason that I has set the Data Source Update Mode to "OnPropertyChanged" is that the users of my application are used to selecting a different value from a combo box and then closing an edit form without tabbing off the combo box.  In this scenario, the control never Validates and the users new selection does not get saved.

Hello Norm,

nwdeitech said:

Is there a way to set a default value that the control uses when the user types a value that is not in the list. 

Maybe you could try :

private void ultraCombo1_ItemNotInList(object sender, Infragistics.Win.UltraWinEditors.ValidationErrorEventArgs e)
{
    //MessageBox.Show("ultraCombo1_ItemNotInList() event fired");
    ultraCombo1.Value = "My default Value";
}

nwdeitech said:

The reason that I has set the Data Source Update Mode to "OnPropertyChanged" is that the users of my application are used to selecting a different value from a combo box and then closing an edit form without tabbing off the combo box.  In this scenario, the control never Validates and the users new selection does not get saved.

I`m not sure that I understand your scenario, but when the user try to close the win form, the order should be:

1.  Our UltraCombo control will exit from Edit Mode - the ItemNotInTheList event will fired

2. Then the WinForm will be close.

Please let me know if you think that I misunderstood your scenario or if you have any questions.

Hi Georgi,

The problem is that when the control is bound, and the property setting under DataBindings | Advanced for "Data Source Update Mode" is set to OnPropertyChange, the Not In List event does not file.  Instead, it appears that the Binding Source tries to assign an invalid GUID value to the strongly types dataSet which causes the error to be raised.  (I have not found a way to catch this).

Since I have been able to determine the various property settings that cause this error condition, I will prepare a small test project that uses the AdventureWorks database and send it to you.

Norm

One more note.  In order to replicate my scenario, you would need to work with 2 tables.  One is bound to your Binding Source/Navigator and has a Guid column that relates to a Guid column in the second table.  The second table would be the source of the Combo Box.  The combo box would be bound to the GUID column in table 1 and the Value member of the combo box would be the Guid column from Table 2.

So, if your database includes a table for something like tasks assigned to a staff member (based on the TaskID GUID column) that would be the source for the binding navigator.  Then the Task table would be the source for the combo box where its Value Member is the TaskID Guid column.

Thanks,

Norm

Hi Georg,

Thank you for the video.  I followed most of what you were doing but think that I missed a few parts because it was moving too fast and I would have liked to interact while it was playing.

Correct me if I am wrong.  It looked like the combo box was bound to the text value displayed and not the GUID column.  With it bound to the Text, you set the Advanced property for Data Source Update Mode to "OnPropertyChanged".  This would not cause the error that I encountered because there is no formatting issue for the bound string.  Then, when you typed in the "Task A 333333" value, your data source that was bound to the control text columns got updated.

I have started changing my application to use the setting "OnValidation" and with come coding style changes I think that I can made a user interface that will be acceptable to my clients.

Rather than taking more of you time on this, you can close the current thread and if I run into a roadblock down the line I will raise questions then under a new thread.

Norm