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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.
Next, drag and drop a Required Field Validation control below the Text Box.
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.
Make Company Name blank and click on Update button.
You should see an error message as shown in Figure 7.
We need to convert these Bound Fields to Template Fields.
In order to do so select "Edit Columns..." from the smart tag of the Grid View. Select Company Name and Contact Name fields and click on "Covert this field into a Template Field" link.
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.
On the first step of the wizard click on "New Connection" button to open a dialog as shown in Figure 1.
This will convert them from Bound Field to Template Field.
Now from the smart tag of the Grid View choose "Edit Template" and then select "Edit Item Template" of Company Name column.
This way you can attach client side validation controls to the Grid View columns.