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Validating event net

validating event net-34

Here is an example: You can also trigger the Validation event by giving focus to a control and taking the focus away.You might even loop through all the controls on your form and focus each of them individually (or an individual control by giving it focus then changing the focus to another control), achieving the same effect: Which solution is better?

This will future proof your code as much as possible and prepare you for any breaking changes down the road to the internals of the Framework.When the Text Box loses its focus the value would be validated and the Combo Box would be populate the appropriate values retrieved from the database.Of course, there was lots of more cool features involved but for the sake of this post I'll keep it simple.If the focus is moved to a cell in the same row, then no other events occur.If the focus is moved to a cell in another row, then both Row Validating and Row Validated are fired, containing the whole row data, including the new and the old values of the edited cells.It is always raised before the Row Validated event, which is described in the next section.

Row Validating gives you the power to stop the commit process on a row level obeying some internal rules of your application.

It is always raised before the Cell Validated event, which is described in the next section.

Cell Validating gives you the power to stop the commit process on a cell level obeying some internal rules of your application. To String()) If new Value And here is how the error message is displayed: The Cell Validated event occurs when the cell has validated the new content.

Both Cell Validating and Row Validating events allow you to stop the commit process by setting the boolean property Is Valid to False.

The Cell Validating event occurs when a cell is about to commit new content.

For example, a cell might contain only values between 0 and 12, and all other values are considered invalid. Unique Name = "Country Id" Then Dim new Value As Integer = Int32. It is raised after the Cell Validating event (when the Is Valid is not set to False), described in the previous section.