遍历WPF DataGrid单元格

• using System.Windows.Controls;
• using System.Windows.Controls.Primitives;
• using System.Windows.Media;
• namespace Splash.WPF
• {
• public static class DataGridPlus
• {
• /// <summary>
• /// 获取DataGrid控件单元格
• /// </summary>
• /// <param name="dataGrid">DataGrid控件</param>
• /// <param name="rowIndex">单元格所在的行号</param>
• /// <param name="columnIndex">单元格所在的列号</param>
• /// <returns>指定的单元格</returns>
• public static DataGridCell GetCell(this DataGrid dataGrid, int rowIndex, int columnIndex)
• {
• DataGridRow rowContainer = dataGrid.GetRow(rowIndex);
• if (rowContainer != null)
• {
• DataGridCellsPresenter presenter = GetVisualChild<DataGridCellsPresenter>(rowContainer);
• DataGridCell cell = (DataGridCell)presenter.ItemContainerGenerator.ContainerFromIndex(columnIndex);
• if (cell == null)
• {
• dataGrid.ScrollIntoView(rowContainer, dataGrid.Columns[columnIndex]);
• cell = (DataGridCell)presenter.ItemContainerGenerator.ContainerFromIndex(columnIndex);
• }
• return cell;
• }
• return null;
• }
• /// <summary>
• /// 获取DataGrid的行
• /// </summary>
• /// <param name="dataGrid">DataGrid控件</param>
• /// <param name="rowIndex">DataGrid行号</param>
• /// <returns>指定的行号</returns>
• public static DataGridRow GetRow(this DataGrid dataGrid, int rowIndex)
• {
• DataGridRow rowContainer = (DataGridRow)dataGrid.ItemContainerGenerator.ContainerFromIndex(rowIndex);
• if (rowContainer == null)
• {
• dataGrid.UpdateLayout();
• dataGrid.ScrollIntoView(dataGrid.Items[rowIndex]);
• rowContainer = (DataGridRow)dataGrid.ItemContainerGenerator.ContainerFromIndex(rowIndex);
• }
• return rowContainer;
• }
• /// <summary>
• /// 获取父可视对象中第一个指定类型的子可视对象
• /// </summary>
• /// <typeparam name="T">可视对象类型</typeparam>
• /// <param name="parent">父可视对象</param>
• /// <returns>第一个指定类型的子可视对象</returns>
• public static T GetVisualChild<T>(Visual parent) where T : Visual
• {
• T child = default(T);
• int numVisuals = VisualTreeHelper.GetChildrenCount(parent);
• for (int i = 0; i < numVisuals; i++)
• {
• Visual v = (Visual)VisualTreeHelper.GetChild(parent, i);
• child = v as T;
• if (child == null)
• {
• child = GetVisualChild<T>(v);
• }
• if (child != null)
• {
• break;
• }
• }
• return child;
• }
• }
• }