DataGrid 如何得到DataGridRow 和DataGridCell 对象

第一行为不可编辑

 DataGridRow row = (DataGridRow)dataGrid1.ItemContainerGenerator.ContainerFromIndex(0);

            if (row == null)

            {

                dataGrid1.UpdateLayout();

                row = (DataGridRow)dataGrid1.ItemContainerGenerator.ContainerFromIndex(0);

                 

         }

         row.IsEnabled = false;

        public static T GetVisualChild<T>(Visual parent) where T : Visual

        {

            T childContent = default(T);

            int numVisuals = VisualTreeHelper.GetChildrenCount(parent);

            for (int i = 0; i < numVisuals; i++)

            {

                Visual v = (Visual)VisualTreeHelper.GetChild(parent, i);

                childContent = v as T;

                if (childContent == null)

                {

                    childContent = GetVisualChild<T>(v);

                }

                if (childContent != null)

                {

                    break;

                }

            }

            return childContent;

        }

  

  

//第二行第一列不可编辑

                 DataGridRow rowContainer = GetDataGridRow(dataGrid1, 1);

  

                if (rowContainer != null)

                {

                    DataGridCellsPresenter presenter = GetVisualChild<DataGridCellsPresenter>(rowContainer);

                    DataGridCell cell = (DataGridCell)presenter.ItemContainerGenerator.ContainerFromIndex(1);

                    if (cell == null)

                    {

                        dataGrid1.ScrollIntoView(rowContainer, dataGrid1.Columns[0]);

                        cell = (DataGridCell)presenter.ItemContainerGenerator.ContainerFromIndex(0);

                        

                    }

  

                    cell.IsEnabled = false;

                }