Question

I run this query

"insert into students (StudentName) values ('reza');insert into  Records (RecordValue,StudentID)" +
            " values (20,@@IDENTITY)";

in C# and get following exception :

Characters found after end of SQL statement

Answer 1

I guess you want to retrieve the identity of the newly inserted student and then insert that into the “Records” table, right?

I would strongly suggest you use SCOPE_IDENTITY() instead of @@IDENTITY which has some problems if you have e.g. triggers on your table. Pinal Dave has a great blog post about those problems.

Also, if you call SQL Server from C#, I’d strongly recommend you use the native .NET SQL Provider (SqlConnection, SqlCommand, etc.) – not oledbcommand.

Try this

using (SqlConnection _con = new SqlConnection("server=(local);database=TEST;integrated security=SSPI;"))
{
    string queryStmt = "INSERT INTO dbo.Students (StudentName) VALUES('reza'); " +
                       "INSERT INTO dbo.Records(RecordID, StudentID) VALUES (20, SCOPE_IDENTITY());";

    using (SqlCommand _cmd = new SqlCommand(queryStmt, _con))
    {
       try
       {
            _con.Open();
            _cmd.ExecuteNonQuery();
            _con.Close();
       }
       catch (Exception exc)
       {
           string msg = exc.Message;
       }
    }
 }

This certainly works, I just tested it successfully in my setting.