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Cellvalidating event

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Canceling this event cancels the changes to the current cell.When this event is canceled in data-bound mode, the new value is not pushed to the underlying data source. Cell Validated event to perform post-validation processing.When this event is canceled in data bound mode, the new value is not pushed to the underlying data source.When this event is canceled in virtual mode, the Cell Value Pushed event is not raised. Data Grid View will prevent the user's cursor from leaving the cell until a non-empty string is entered. You can customize the appearance and behavior of the xref: System. Data Grid View control in several ways: xref: System.

Data Grid View class provides a convenient way to perform validation before data is committed to the data store.

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.

Sometimes the user will just press Esc key to cancel the input value, in this case the Cell Validating event won't get fired and the Error Text will remain shown on the Row Header Column. We often have many columns to be shown in the grid and the user can use horizontal scroll bar to scroll to the region (s)he likes.

When the user scrolls to the right, the Error Text icon will still show up when a cell receives invalid value.