You are creating an ASP.NET page for your company's Web site. Customers will use the ASP.NET page to enter payment information. You add a DropDownList control named oPaymentTypeList that enables customers to select a type of credit card and bank accounts. You need to ensure that customers select a credit card type. You want a default value of Select to be displayed in the oPaymentTypeList control. You want the page validation to fail if a customer does not select a payment type from the list. What should you do?
Correct Answer: Add a RequiredFieldValidator control and set its ControlToValidate property to oPaymentTypeList. Set the InitialValue property of the RequiredFieldValidator control to Select.
Explanation:
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