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; 
•         } 
•     } 
• } 

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