Raise cellvalidating event datagridview
For example, even if the Customer ID column is the primary key column, you are able to change its values.Similarly, there is no check on the new values being entered in other columns.In your case, the User Deleting Row event handler looks like this: Here, you display a message box to the user with a warning message.If the user decides not to delete the row, you set the Cancel property of Data Grid View Row Cancel Event Args parameter to True. Note that the User Deleting Row event is not raised if you remove a row using the Remove At() method.This way, the user can enter a value in the Customer ID column for just the new row.To prompt the user about row deletion, you need to handle the User Deleting Row event of the Data Grid View control.
Canceling this event cancels the changes to the current cell.
So the Cell Validating event cannot be fired when pressing the "Enter" key. The following code example shows how to use this event to validate the cell's value.
If you want the Cell Validating event to fire, assign the "Enter" key to the Selection Actions. To run this example, create a windows form, and add a Gc Multi Row control to the form.
Notice how the Country column shows a combo box from which you can pick up a country value.
Also, see how the button column is displayed as a push button.