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By using validation, you can make sure that your control's data satisfies the format required by the data source, and that it does not contain any special characters such as quotation marks and back slashes that might be unsafe.When you use data binding, the data in your control is synchronized with the data source during execution of the Validating event.When users enter data into your application, you may want to verify that the data is valid before your application uses it.You may require that certain text fields not be zero-length, that a field be formatted as a telephone number or other type of well-formed data, or that a string not contain any unsafe characters that could be used to compromise the security of a database.So, which is the better option, in terms of both efficiency and industry-standards?You should always use the Validating event, it was made to support validation.
From what I understand, they both occur at the same time. Leave Event, the Leave event occurs right before the validating event. Below is a simple code sample for general validation purpose. Cause Validation: True Private Sub Button Send_Click(By Val sender As System. Auto Validate: Disable or Enable Allow Focus Change Text Box. Click 'Validate Children() returns true when all child controls are validated If Me. Show("Success") End If End Sub Private Sub Text Box Not Empty_Validating( _ By Val sender As System. For a code example that validates an email address in a Text Box, see Validating.Validation is very useful when you have bound your controls to a data source, such as a database table.
If you determine that the control's data is not valid, you can cancel the Validating event by setting this object's Cancel property to .