Check if record in a table exist in a database through ExecuteNonQuery

Question

in my program i need to check if a record in the database already exists in the table using the if statement. using c# i am trying to do this through an sql con

Answer 1

You should do a count(1) on the table instead of a select * and then executescalar to get that integer value.

Using your existing code I would change it to be:

using (SqlConnection sqlConnection = dbUtil.GetSqlConnection(dbUtil.GetConnectionStringByName("NonConnectionString")))
        {
            using (SqlCommand sqlCommand = new SqlCommand("SELECT count(1) from users where user_name = 'Adam' AND password = '123456'", sqlConnection))
            {
                sqlresult = sqlCommand.ExecuteNonQuery();
            }
        }

Please note that I have used equals values instead of like values.

Also if I were do to this I would change your inline sql to use a stored procedure.