I want the event to fire since if the user types in alpha characters into a date format cell, I want an error to occur. I just do not want an error to occur if the cell is cleared.
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Date format for a datagridview cell does not accept a NULL value
We have several DataGridView's in a Desktop application. We have recently begun changing our gridviews over from runtime setup to Design time setup (all columns, formats, etc were done at runtime, now we're setting them up at design time). We have noticed that if you set the format for a DataGridViewColumn to a date format, it throws the DataError event if the cell had data in it but the data is removed. In the designer file, we see that VS sets the NullValue to NOTHING by default. If I remove that line altogether, everything works fine. But this line will reinsert itself whenever we make design changes. Is there something I can set the NullValue to that will pass the DataError event for a date format? I;ve tried DBNull.Value with no success.
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Answers
The code written in the dataerror event simply pops up a message box informing the user that the text entered is not in a date format. The problem is, this event is firing when nothing is entered in the cell.
I can't check for nothing since I cannot check the new value of a cell in the dataerror event. If I try to check a cell's value, it returns the value of the cell before it was modified.
I really beleive this is a bug in the designer for VS2008. If we remove the NullValue = Nothing line in the designer, everything works fine. My concern is that the designer will add this line back when we edit the grid in the future.
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by: CodeCruiserPosted on 2009-02-05 at 02:46:31ID: 23558030
Do you want the event to be fired or do you to avoid the event firing?