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If you want, you can lock the entire Data Grid View control: Validating Users' Edit A common use of the Data Grid View control is for data entry. If not, an error message is displayed on the leftmost column of the Data Grid View control (set via the Error Text property). The error must be corrected before the user can switch to the other cells. Data Grid View Cell Event Args) _ Handles Data Grid View1.

This event is fired when the user tries to edit the Combo Box control: Private Sub Data Grid View1_Editing Control Showing( _ By Val sender As Object, _ By Val e As System. Editing Control Showing Dim combo Box Column As Data Grid View Combo Box Column = _ Data Grid View1. From inside the Form Designer, you should see a very small triangle at the upper right-hand corner of the Data Grid View control. For example, if the Units On Hand column can never be a negative number,you could write a validating rule that looks to see if the value is negative prior to committing the changes to that row.Click on this triangle to select the data source that was created for you when you ran the Data Source Conversion Wizard. You can use the Error Provider class to display the problems detected during validation. There are times when you need to allow the users to insert additional items into the Combo Box control. First, service the Editing Control Showing event of the Data Grid View control. _ Data Grid View Editing Control Showing Event Args) _ Handles Data Grid View1. Adding Items into a Data Grid View Combo Box Column Control The previous section showed how to display a Combo Box control within a cell in the Data Grid View control. This event is fired when the user is done with the typing and leaves the cell: Private Sub Data Grid View1_Cell Validating( _ By Val sender As Object, _ By Val e As System. Cell Validating Dim combo Box Column As Data Grid View Combo Box Column = _ Data Grid View1.

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