String CommandText = "SELECT * FROM P_STAMM ORDER BY MANDANT,ID_NR"; // 
                conn.ConnectionString = "Data Source=DBS-MASTER;Initial Catalog=DBS_KW;Persist Security Info=True;User ID=****;Password=****;Connect Timeout=30";
                cmd = new SqlCommand(CommandText, conn);
                dataAdapter = new SqlDataAdapter(cmd);
                cb = new SqlCommandBuilder(dataAdapter);
                ds = new DataSet();
                dataAdapter.Fill(ds, "P_STAMM");

                dataGridView = new DBS_LIB.ctrlDataGridView();
                bindingSource= new BindingSource(this.components);

                bindingSource.DataSource = ds.Tables["P_STAMM"];

                bindingSource.AllowNew = false;
                (bindingSource.List as DataView).AllowEdit = false;
                (bindingSource.List as DataView).AllowDelete = false;


                
                if ((bindingSource.Current as DataRowView).IsEdit)
                    MessageBox.Show("Edit Mode");
                else
                    MessageBox.Show("Readonly Mode");