User control validating event
User control validating event - Cam bop com видеочат
The validation events are meant to support the data validation of the user input.
The Cell Validating event occurs always before the Cell Validated event when the edited cell is about to lose its focus.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.Invoking the Set Error method of the Error Provider control displays an error indicator image next to the control specified as the first argument to the the Set Error method.The string specified in the second argument in the function invocation is displayed as the tooltip when the mouse is moved over the Error indicator. You will first see the programming you can use to handle errors, and then you will see how to use validation techniques to prevent bad data from being entered into your application in the first place.
But in the real world, you need to handle unexpected problems when your code is running.
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.
The parameters passed to the validating event handler are two: Private Sub rad Grid View_Cell Validating(By Val sender As Object, By Val e As Grid View Cell Validating Event Args) If e. The parameters passed to the validated event handler are two: The Row Validating event occurs when a row is about to commit new content.
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 raised after the Row Validating event (when the Is Valid is not set to False), described in the previous section.