how can i check linq query return with value or not ??

[ahmedhassan96]

hi every body i want know the way which i can check the query result and is it has value or not ex: i made this query var res = from x in rs.Users where x.UserName == "name" select x; i want check if res has value or not thanx for ur time

[Pete OHanlon]

bool hasValue = res.Count > 0;

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[J4amieC]

var res = (from x in rs.Users
where x.UserName == "name"
select x).FirstOrDefault();

if res == null after that then no record was returtned, otherwise res will have the value of x. You may also like to lookup SingleOrDefault() which is similar.

[Nilish]

Sorry for interrupting in ur thread , actually my question is little similar to ur’s After finding that the result is nothing /or not nothing, I have to insert the ---Select--- record in the combobox , at first place.how can it append to combobox.