Answer Posted / swetha v

Hi Friends,

I hope the below solution helps....

1. Please add the required field validator for the texbox.
2. In Page_Load method, we can add the below statement

Dropdownlist.Attributed.Add
("OnChange","javascript:ValidateOtherCity();")

Add the below javascript function on the aspx page

function ValidateOtherCity()
{
var other = window.document.getElementById
("DropdownlistName");

if(other.value == 'Other')
{
ValidatorEnable(RequiredFieldValidatorName,true);
}
else
{
ValidatorEnable(RequiredFieldValidatorName,false);
}
}

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