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Set the Control To Validate property of Required Field Validator control to Text Box1 (i.e. Also, set its Error Message property to "Please enter company name".

Note that by default all validation controls validate on the client side.

Click on the "Advanced" button and check the "Generate INSERT, UPDATE and DELETE statements" checkbox (Figure 3). Now that you have configured the SQL Data Source control let's bind it with a Grid View control. Open its smart tag and configure it as shown in Figure 4.

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Right click on the Grid View and select "End template editing" Run the web form.

Click on the Edit button of the Grid View so that it goes into the edit mode.

In our example we will illustrate the use of Updating event for the validation purpose.

Add Grid View1_Row Updating event handler as shown below: The Row Updating event handler receives an event argument of type Grid View Update Event Args.

Inside the event handler we added two validation conditions: We used the New Values collection to check the entered country.

If the country is null then we set Cancel property of Grid View Update Event Args class to true.By default when the Grid View controls goes in edit mode, it displays Text Boxes for entering values.You can not attach validation controls directly to these Text Boxes.Here, our validation criteria is that the entered name must not contain title of courtesy (Mr./Mrs./Ms.). That is when you can handle certain events of Grid View control.We check the value entered in the Text Box using args. Especially the following events are important for validation point of view.This will display the template designer for the column as shown in Figure 6.

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