infragistics ultraGrid单元格、行只读

直接代码：  

          DataSet ds = new DataSet();
            DataTable dt = new DataTable();
            dt.Columns.Add("Name");
            dt.Columns.Add("Age");
            dt.Rows.Add("a", "b");
            dt.Rows.Add("a1", "b1");
            dt.Rows.Add("a2", "b2");
            //dt.Rows[1].SetModified();
          
            ultraGrid1.DataSource = dt;
          
            ultraGrid1.Rows[0].Cells[0].Activation = Infragistics.Win.UltraWinGrid.Activation.NoEdit;

            ultraGrid1.Rows[1].Activation = Infragistics.Win.UltraWinGrid.Activation.NoEdit;