WPF Datagrid：以编程方式编辑单元格

我有一个单元格需要在点击它时设置它的值。 它与不同属性的多重绑定。

我应该在哪里这样做？ 我一直试图在datagrid beginingedit处理程序中这样做（没有太大的成功）。 我可以手动点击两次（一次选择单元格，然后开始编辑），并设置值。 但我想以编程方式做到这一点……

private void MyDataGrid_BeginningEdit(object sender, DataGridBeginningEditEventArgs e) { TextBlock t = e.EditingEventArgs.OriginalSource as TextBlock; if (t == null) return; t.Text = SimulatedEdit(); // All this below is just me trying different thing. Not sure what I need to be doing e.EditingEventArgs.Handled = true; MyDataGrid.CommitEdit(); MyDataGrid.UnselectAllCells(); } 

这就是设置columntemplate的方法

 MultiBinding tempmb = new MultiBinding(); Binding tempXB = new Binding("X"); Binding temptYB = new Binding("Y"); tempmb.Bindings.Add(tempXB); tempmb.Bindings.Add(temptYB); tempmb.ConverterParameter = "ggrid"; tempmb.Converter = new LabelDecider(); DataGridTemplateColumn dgtc = new DataGridTemplateColumn { Header = "blah", CanUserSort = false, CanUserReorder = false, }; DataTemplate t = new DataTemplate(); FrameworkElementFactory f = new FrameworkElementFactory(typeof(TextBlock)); f.SetBinding(TextBlock.TextProperty, tempmb); // Setup background color binding MultiBinding colorb = new MultiBinding(); colorb.Bindings.Add(tempX); colorb.Bindings.Add(tempY); colorb.ConverterParameter = "color"; colorb.Converter = new LabelDecider(); f.SetBinding(TextBlock.BackgroundProperty, colorb); t.VisualTree = f; //Every columns Text and Background are using bindings dgtc.CellTemplate = t; //setup editing template DataTemplate ced = new DataTemplate(); FrameworkElementFactory f2 = new FrameworkElementFactory(typeof(TextBox)); MultiBinding tempmb2 = new MultiBinding(); tempmb2.Bindings.Add(tempXB); tempmb2.Bindings.Add(tempYB); tempmb2.Mode = BindingMode.TwoWay; tempmb2.ConverterParameter = "ggrid"; tempmb2.Converter = new LabelDecider(rDestination.Recievers[k]); tempmb2.UpdateSourceTrigger = UpdateSourceTrigger.LostFocus; f2.SetBinding(TextBox.TextProperty, tempmb2); ced.VisualTree = f2; dgtc.CellEditingTemplate = ced; MyDataGrid.Columns.Add(dgtc); 

Answer 1

不确定我是否正确理解你的问题; 看起来您想要以编程方式访问和更改DataGridCell内容。 请查看以下示例; 我已经为datagrid添加了一个SelectedCellsChanged甚至处理程序，每次选择新单元格时都应该触发它; 拥有DataGridCellInfo对象，您可以访问DataGridCell对象并更改其内容。

 private void dataGrid1_SelectedCellsChanged(object sender, SelectedCellsChangedEventArgs e) { foreach (DataGridCellInfo cellInfo in dataGrid1.SelectedCells) { // this changes the cell's content not the data item behind it DataGridCell gridCell = TryToFindGridCell(dataGrid1, cellInfo); if (gridCell!=null) gridCell.Content = "changed!!!"; } } static DataGridCell TryToFindGridCell(DataGrid grid, DataGridCellInfo cellInfo) { DataGridCell result = null; DataGridRow row = (DataGridRow)grid.ItemContainerGenerator.ContainerFromItem(cellInfo.Item); if (row!=null) { int columnIndex = grid.Columns.IndexOf(cellInfo.Column); if (columnIndex>-1) { DataGridCellsPresenter presenter = GetVisualChild(row); result = presenter.ItemContainerGenerator.ContainerFromIndex(columnIndex) as DataGridCell; } } return result; } static T GetVisualChild(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(v); } if (child != null) { break; } } return child; } 

GetVisualChild的代码取自此处

希望它会帮助你，你也可能想要从问题背后的代码看一下特定Cell的BeginEdit 。 我想它也可以给你一些想法

问候