check detail view null fields before inserting

[RebeccaH]

I have detail view in asp.net from which i am inserting data to DB.Here i want to check before insert if any field is null or not and if null then don't insert otherwise insert into db i have tried the following code but it doesn't working\[code\]protected void DetailsView1_ItemInserting(object sender, DetailsViewInsertEventArgs e) { string unt = (string)e.Values["UNT_COD"]; if (unt == "") { e.Cancel = true; } }\[/code\]Through this code i am not achieving my purpose plz any one help me to find out the way to check