in DropDownCheckBoxes validate maximum item selected

Question

How to validate maximum item select in DropDownCheckBoxes c#

Devendra Kumar · Answer

sir this validation only validate to select value  i want only select two check box

Anu V · Answer

Use asp.net ExtendedRequiredFieldValidator asp : ExtendedRequiredFieldValidator ID = ExtendedRequiredFieldValidator1 runat = server ControlToValidate = DropDownCheckBoxes1 ErrorMessage = Required ForeColor = Red> asp : ExtendedRequiredFieldValidator >