Datagridview rowvalidating event example

Canceling this event prevents the user from exiting the cell until a valid value is entered or the edit process is canceled (via Esc key).

The Data Bound Item will be updated only if the cell is validated.

In this case we need a "global" error checker to detect data conversion errors.

' ' Check to see if the user input meets all of the business rules before ' we move on to another row. Data Grid View Cell Cancel Event Args) Handles _ Data Grid View1. Value The error checking discussed in the previous section may not detect "data integrity errors" (those errors where the input violates a database foreign key, unique, or primary key constraint).

I used Q3 2010 SP1 (2010.3.10.1215) version for my tests.When the validation fails, the editor is closed, but the user cannot change the current row in the grid until a valid cell value is entered.In this situation the editor is not kept active when the validation fails and pressing the Esc key does not revert the changes as the editor is already closed.It has the initial "look and feel" of an Excel spreadsheet.You can bind a Data Table to the control so the user can easily add/delete/modify data in a database. Products) End Sub By default, the automatically generated columns may need some tweaking.

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