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constr="Data Source=.\\SQLEXPRESS;AttachDbFilename="+dbpath+";Integrated Security=True;Connect Timeout=30;User Instance=True";
conn = new SqlConnection(constr);
conn.Open();
query = "select * from sc";
adapter = new SqlDataAdapter(query,conn);
adapter.Fill(ds,"good");
dataGridView1.DataSource = ds.Tables["good"].DefaultView;