01.sql = "SELECT user_id, password, first_name,level FROM USER_USE_PRO WHERE user_id ='"+textBox1.Text+"' AND password ='"+textBox2.Text+"'";
02.
03. sqlcmd = new SqlCommand(sql, connection);
04. sqlcmd.CommandText = sql;
05.
06. da = new SqlDataAdapter(sqlcmd);
07. da.SelectCommand = sqlcmd;
08.
09. ds = new DataSet();
10. da.Fill(ds, "USER_USE");
11.
12.
13. bindingSrc = new BindingSource();
14. bindingSrc.DataSource = ds.Tables["USER_USE"];
