how to insert only unique records in database using LINQ

Question

my question is i have two columns
1st is employeeid
2nd is employeename

employee id is primary key...

but i also want that employeename also unique..so how can i do on click of submit button.if employee name is match wid other colum..then message is display tht already exists..

i want thaat solution in LINQ

Bhabani prasad Dash · Answer

Hii if u want to to check user exist or not just check it through stored procedure and call the proc from your application .i just write the stored proc u just call from app if u dont get plz repl me my mail id bhabani.rec@gmail.com CREATE PROCEDURE sp_EMPLOYEEINFORMATION @EMPLOYEEID varchar(50) @EMPLOYEENAME varchar(50) @ERROR VARCHAR(100) OUT AS BEGIN SET NOCOUNT ON; ---Checking Condition if User exists or not if user not exists returns different message if exists returns different message IF NOT EXISTS(SELECT * FROM TABLENAME WHERE EMPLOYEENAME =@EMPLOYEENAME ) BEGIN INSERT INTO TABLENAME ( EMPLOYEEID EMPLOYEENAME ) VALUES ( @EMPLOYEEID  @EMPLOYEENAME ) --If User Successfully Registerd I am returing this Message as Output Parameter SET @ERROR=@EMPLOYEENAME +' Registered Successfully' END ELSE BEGIN --If User already Exists i am returning this Message as Output Parameter SET @ERROR=@EMPLOYEENAME + ' Already Exists' END END

Jignesh Trivedi · Answer

hi In this case you can also check whether emp name already exists in system (database) by select query. or you can also put UNIQUE Constraints on database column. please refer http://msdn.microsoft.com/en-IN/library/ms191166%28v=sql.105%29.aspx are you use LINQ to SQL or LINQ to Entity? hope this will help you.

brunda k · Answer

http://social.msdn.microsoft.com/forums/en-US/linqtosql/thread/b1a0eb5b-d5d3-41af-829f-bbbac47b7383/