column, its value is tested for validity by checking that it is not empty.
If the event handler for the Cell Validating event finds that the value is an empty string, the Data Grid View prevents the user from exiting the cell until a non-empty string is entered.
cell, an exception occurs and I get a run-time error.
Alternately, if a user tries to insert a string into an integer column, they get a very long error message which isn't user friendly at all.
sno date day 1 1/1/2005 Monday 2 7/1/2005 Monday 3 14/1/2005 Monday 4 21/1/2005 Monday user can change date 14/1/2005 to not lessthan= 7/1/2005 and not greater= than 21/1/2005 can u help me what i have to do for this validation???????
Canceling this event cancels the changes to the current cell.
Cell Validating Dim header Text As String = _ data Grid View1.
Text = "Data Grid View validation demo (disallows empty Company Name)" End Sub Private Sub Form1_Load(By Val sender As System. All Cells Except Header) End Sub Private Sub data Grid View1_Cell Validating(By Val sender As Object, _ By Val e As Data Grid View Cell Validating Event Args) _ Handles data Grid View1. Header Text ' Abort validation if cell is not in the Company Name column. Equals("Company Name") Then Return ' Confirm that the cell is not empty.
This, therefore, undoes any action you perform in the handler.
What you have to do instead is change the value in the editing control (remembering not to cancel the event).