Thread: Asp.net developer

Hi, I am asp.net developer. In my one form there is dropdown list menu with the name of the cities like Washington, New York, California Other and a text box that would allow the user to enter the name of the city if other is chosen. How to enable validation on the text box if other is chosen. Please help me out with your valuable suggestions. I would be very grateful.

The script that I have mentioned will definitely help you. Simply write a javascript function like this
on button click or on onkeypress event of text box

Code:

function validate()
{
if(document.getelementbyid("ur dropdownlist").value=="other")
{
if(document.getelementbyid("ur textbox").value=="")
{
alert("please enter city name");
return false;
}

}

}

Try out this code:

Code:

On_page load
{
RequiredFieldValidator1.Enabled = false;
}

if (DropDownList1.SelectedItem.Text == "Other")
        {
            RequiredFieldValidator1.Enabled = true;
        }
        else
        {
            RequiredFieldValidator1.Enabled = false;
        }