Error: insert records into SQL database

[sheetal shah]

i am trying to insert records into SQL database ..........here is the code snippet
I receive the System.Data.sql client..... Exception

Code:

public void setData(CustInfo c)
        {
            CQuery cq = new CQuery();
            ExecuteQuery1(CQuery.custQuery,c);
        }


        public void ExecuteQuery1(string query,CustInfo c)
        {
            try
            {
                string conn = "Persist Security Info =false;Server=intel/sqlexpress;Initial Catalog = Customer;Integrated Security = true";

                using (SqlConnection sqlcon = new SqlConnection(conn))
                {

                    using (SqlCommand cmd = new SqlCommand(query, sqlcon))
                    {
           
                        cmd.Parameters.Add(new SqlParameter(@Firstname, c.Firstname));
                        cmd.Parameters.Add(new SqlParameter(@Email, c.Email));
                        sqlcon.Open();
                        cmd.ExecuteNonQuery();
                    }
                }
            }
            catch (SqlException se)
            {

                Console.WriteLine(se.ToString());
            }
        }
    }
}

[PRR]

MSDN

private static void CreateCommand(string queryString,
    string connectionString)
{
    using (SqlConnection connection = new SqlConnection(
               connectionString))
    {
        SqlCommand command = new SqlCommand(queryString, connection);
        command.Connection.Open();
        command.ExecuteNonQuery();
    }
}

1. Check whether your connection string is correct.
2. Go to query analyzer and run your sample query.