If you have too many controls and validators(required field validator custom etc...) on your aspx page and you ever wondered which validator on your aspx page is causing Page.IsValid to return false or true
This might come handy:)
foreach (object o in Validators)
{
if (!((IValidator)o).IsValid)
{
Response.Write(((Control)o).ID + "
");
}
}
Source:-http://forums.asp.net/t/1464738.aspx/1
