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Custom DataGrid in WinForm

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Hi,

I have a DataGrid with custom ComboBox and DataTimePicker controls in
column styles. When I add a new row, typing values into all columns,
then close the form, I get a NoNullAllowedException, with additional
information "Column 'RoomType' does not allow nulls". This is one of
two columns with custom ComboBox styles. The SelectedValue of the
ComboBox is bound to the RoomType column of the dataset. How do I
correct this problem? Any ideas?

Thanks,
RFickling

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Nov 16 '05 #1
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