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There can be several approaches taken for validating data. For our example we are going to use Customers table of Northwind database. Open its smart tag and choose "Configure Data Source" option to start Configure Data Source wizard.
Note: Instead of using Text Box in normal mode use Labels. NET 2.0 Grid View control allows us to quickly edit and delete records.However, most of the real world cases call for validating the data being edited or deleted. Drag and drop an SQL Data Source control on the web form.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.