Get values from database to textbox
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I have a WinForm that have a DataGridView and a ComboBox, allowing users to select a subject (from the database).

>       cbxSubject.DataSource = dsSched.Tables["Schedules"];
      cbxSubject.DisplayMember = "Subject";
      ...

The DataGridView looks something like this: http://i45.tinypic.com/18gmmu.png I added the DataGridView since I don't know any other way how to get those values from the database. I used a code, something like this, to get the values:

>  TextBox1.Text = DataGridView1.Rows[3].Cells[1].Value.ToString();

But then I realized that it won't work anymore if there are more than 2 subjects to choose from, because the code is set to get the value on the 3rd row and the 1st cell. So even when the user changed subject, the output value (w/c are then displayed in a TextBox) will still be the same. Are there any other ways to get those values? Please help, thanks.