Notice how the Column Index and Row Index properties of Data Grid View Cell Validating Event Args parameter are used.
At run time, if the validation fails, the Data Grid View displays a red exclamation icon in that cell (see below).
Currently the validation occurs on row and cell level.
To get notified, you can use the following events exposed by the Rad Grid View control: It is important to know that each one of the validation events is fired only when the user is trying to commit new data in the Rad Grid View control.
It is always raised before the Cell Validated event, which is described in the next section.