Validation for Dropdown

Question

I have two dropdowns with same list populated from database . I want to validate where dropdown 1 value is not same as dropdown 2 . Thanks SmartDev

Answer 1

If you want to stay in the asp.net world use a CompareValidator using Operator="NotEqual" like this:

  <asp:CompareValidator id="Compare1" runat="server"
       ControlToValidate="DropDown1" 
       ControlToCompare="DropDown1"
       EnableClientScript="True"
       Operator="NotEqual"
       ErrorMessage="Duplicate selection detected"/>

Answer 2

ASP.Net comes with a whole suite of validator controls. A quick look at them is all you really need to find out how to do this.

<asp:CompareValidator id="valCompare" runat="server"
    ControlToValidate="dropdown1" 
    ControlToCompare="dropdown2"
    Operator="NotEqual"
    ErrorMessage="* You must enter different values into the dropdownboxes"
    Display="dynamic">*
</asp:CompareValidator>

Answer 3

if (ddl1.SelectedValue != ddl2.SelectedValue)
{
    //different
}
else
{
    //same
}