Question

Could somebody tell me why this isn’t adding the values to the database. The form runs fine and doesn’t return any errors.

    private void button1_Click(object sender, EventArgs e)
    {
        SqlConnection connection = new SqlConnection();
        SqlCommand command = new SqlCommand();

        connection.ConnectionString = (@"Data Source=.\SQLEXPRESS;AttachDbFilename=C:\Users\John\Documents\Setup.mdf;Integrated Security=True;Connect Timeout=30;User Instance=True");

        command.Parameters.AddWithValue("@userName", textBox1.Text);
        command.Parameters.AddWithValue("@passWord", textBox2.Text);
        command.CommandText = "INSERT INTO Setup (userName, password) VALUES(@userName, @passWord)";



        try
        {
            connection.Open();
            int rowsAffected = command.ExecuteNonQuery();

        }
        catch (Exception ex)
        {
            // handle exception
        }
        finally
        {
            connection.Close();
        }


    }

FYI: I’m a “newbie” My database is called Setup. I’ve manually added a table called myTable with 2 columns of userName and another one called password both set at nchar(50)

Answer 1

You need to specify the Table, not the database (which gets used in the connection string). Added the schema prefix to the table name:

command.CommandText = "INSERT INTO dbo.myTable (userName, password) VALUES (@userName, @passWord)";

And add:

command.Connection = connection;

to associate your Command object with the connection object.