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Row Validating gives you the power to stop the commit process on a row level obeying some internal rules of your application.
For example, it might not be allowed for a row to contain equal values in two specific columns as well as any other kind of relations between the values of a single row.
Cell Validating Dim header Text As String = _ data Grid View1.
Text = "Data Grid View validation demo (disallows empty Company Name)" End Sub Private Sub Form1_Load(By Val sender As System. All Cells Except Header) End Sub Private Sub data Grid View1_Cell Validating(By Val sender As Object, _ By Val e As Data Grid View Cell Validating Event Args) _ Handles data Grid View1. Header Text ' Abort validation if cell is not in the Company Name column. Equals("Company Name") Then Return ' Confirm that the cell is not empty.
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.
They do not occur when the Rad Grid View loads data.
If the event handler for the Cell Validating event finds that the value is an empty string, the Data Grid View prevents the user from exiting the cell until a non-empty string is entered.
Load ' Initialize the Binding Source and bind the Data Grid View to it. Data Source = Get Data("select * from Customers") Grid View1. Auto Resize Columns( _ Data Grid View Auto Size Columns Mode.
Cancel = True End If End Sub Private Sub data Grid View1_Cell End Edit(By Val sender As Object, _ By Val e As System. Cell End Edit ' Clear the row error in case the user presses ESC. For more information, see Protecting Connection Information.
Empty End Sub Private Shared Function Get Data(By Val select Command As String) As Data Table Dim connection String As String = _ "Integrated Security=SSPI; Persist Security Info=False;" _ "Initial Catalog=Northwind; Data Source=localhost; Packet Size=4096" ' Connect to the database and fill a data table. Also see How to: Compile and Run a Complete Windows Forms Code Example Using Visual Studio.
You can also build this example in Visual Studio by pasting the code into a new project.