C# DataGrid嵌套DataGrid动态隐藏显示行
前端代码：
<Window x:Class="DataGridPractice.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:local="clr-namespace:DataGridPractice" mc:Ignorable="d" Title="MainWindow" Height="450" Width="800"> <Grid Margin="0,0,0,214" Loaded="Grid_Loaded"> <Grid.Resources> <DataTemplate x:Key="DataGridTemplateA"> <DataGrid Name="DataGrid2" HeadersVisibility="None" CanUserAddRows="False" CanUserDeleteRows="False" CanUserResizeColumns="False" CanUserResizeRows="False" CanUserReorderColumns="False" CanUserSortColumns="False" AutoGenerateColumns="False" HorizontalAlignment="Left" > <DataGrid.Columns> <DataGridTextColumn DisplayIndex="0" Binding="{Binding name, Mode=TwoWay}"/> </DataGrid.Columns> </DataGrid> </DataTemplate> </Grid.Resources> <DataGrid Name="DataGrid1" CanUserAddRows="False" CanUserDeleteRows="False" CanUserResizeColumns="False" CanUserResizeRows="False" CanUserReorderColumns="False" CanUserSortColumns="False" AutoGenerateColumns="False" HorizontalAlignment="Left" VerticalContentAlignment="Center"> <DataGrid.Columns> <DataGridTextColumn DisplayIndex="0" Binding="{Binding id, Mode=TwoWay}" /> <DataGridTextColumn DisplayIndex="1" Binding="{Binding name, Mode=TwoWay}"/> <DataGridTextColumn DisplayIndex="2" Binding="{Binding age, Mode=TwoWay}"/> <DataGridTextColumn DisplayIndex="3" Binding="{Binding TotalCount, Mode=TwoWay}"/> <DataGridTemplateColumn DisplayIndex="4" CellTemplate="{StaticResource DataGridTemplateA}" IsReadOnly="True" Header="2"/> </DataGrid.Columns> </DataGrid> <TextBox HorizontalAlignment="Left" Height="38" Margin="117,310,0,-143" TextWrapping="Wrap" Text="TextBox" VerticalAlignment="Top" Width="154" LostFocus="TextBox_LostFocus"/> </Grid> </Window>
后端代码：
using System; using System.Collections.Generic; using System.Collections.ObjectModel; using System.ComponentModel; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows; using System.Windows.Controls; using System.Windows.Controls.Primitives; using System.Windows.Data; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Imaging; using System.Windows.Navigation; using System.Windows.Shapes; using System.Windows.Threading; namespace DataGridPractice { /// <summary> /// Interaction logic for MainWindow.xaml /// </summary> public partial class MainWindow : Window { public MainWindow() { InitializeComponent(); LoadData(); } public List<Person> list { get; set; } public List<Character> characterlist { get; set; } public void LoadData() { Random r = new Random(); list = new List<Person>(); //Person person = new Person(); //person.id = 1; //person.name = "张三1"; //person.age = r.Next(100); //person.TotalCount = 5; //list.Add(person); characterlist = new List<Character>(); Character chara1 = new Character(); chara1.name = "A"; characterlist.Add(chara1); Character chara2 = new Character(); chara2.name = "B"; characterlist.Add(chara2); Character chara3 = new Character(); chara3.name = "C"; characterlist.Add(chara3); for (int i = 0; i < 9; i++) { if (i > 1) break; Person person = new Person(); person.id = i + 1; person.name = "张三" + i; person.age = r.Next(100); person.TotalCount = 5; list.Add(person); } } private void Grid_Loaded(object sender, RoutedEventArgs e) { DataGrid1.ItemsSource = list; DataGridTemplateColumn templeColumn = DataGrid1.Columns[4] as DataGridTemplateColumn; if (templeColumn == null) return; for (int i = 0; i < DataGrid1.Items.Count; i++) { DataGridCell dataGridCell = GetDataGridCell(i, 0); if (dataGridCell != null) { DataGridCellInfo dataGridCellInfo = new DataGridCellInfo(dataGridCell); if (dataGridCellInfo.Item != null) { object item = dataGridCellInfo.Item; FrameworkElement element = templeColumn.GetCellContent(item); if (element != null) { DataGrid dataGrid2 = (DataGrid)templeColumn.CellTemplate.FindName("DataGrid2", element); dataGrid2.ItemsSource = characterlist; } } } } } public DataGridCell GetDataGridCell(int rowIndex, int columnIndex) { try { DataGridRow rowContainer = GetDataGridRow(rowIndex); if (rowContainer != null) { DataGridCellsPresenter presenter = GetVisualChild<DataGridCellsPresenter>(rowContainer); //这行代码是通过行得到单元格 DataGridCell cell = (DataGridCell)presenter.ItemContainerGenerator.ContainerFromIndex(columnIndex); //这行代码是通过index得到具体的单元格 if (cell == null) { DataGrid1.ScrollIntoView(rowContainer, DataGrid1.Columns[columnIndex]); cell = (DataGridCell)presenter.ItemContainerGenerator.ContainerFromIndex(columnIndex); } return cell; } } catch { return null; } return new DataGridCell(); } public DataGridRow GetDataGridRow(int index) { if (index >= DataGrid1.Items.Count) { throw new IndexOutOfRangeException(String.Format("Index {0} is out of range.", index)); } DataGridRow row = (DataGridRow)DataGrid1.ItemContainerGenerator.ContainerFromIndex(index); if (row == null) { // may be virtualized, bring into view and try again DataGrid1.ScrollIntoView(DataGrid1.Items[index]); WaitFor(TimeSpan.Zero, DispatcherPriority.SystemIdle); row = (DataGridRow)DataGrid1.ItemContainerGenerator.ContainerFromIndex(index); } return row; } public void WaitFor(TimeSpan time, DispatcherPriority priority) { DispatcherTimer timer = new DispatcherTimer(priority); timer.Tick += new EventHandler(OnDispatched); timer.Interval = time; DispatcherFrame dispatcherFrame = new DispatcherFrame(false); timer.Tag = dispatcherFrame; timer.Start(); Dispatcher.PushFrame(dispatcherFrame); } public void OnDispatched(object sender, EventArgs args) { DispatcherTimer timer = (DispatcherTimer)sender; timer.Tick -= new EventHandler(OnDispatched); timer.Stop(); DispatcherFrame frame = (DispatcherFrame)timer.Tag; frame.Continue = false; } public 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; } private void TextBox_LostFocus(object sender, RoutedEventArgs e) { DataGridTemplateColumn templeColumn = DataGrid1.Columns[4] as DataGridTemplateColumn; if (templeColumn == null) return; for (int i = 0; i < DataGrid1.Items.Count; i++) { DataGridCell dataGridCell = GetDataGridCell(i, 0); if (dataGridCell != null) { DataGridCellInfo dataGridCellInfo = new DataGridCellInfo(dataGridCell); if (dataGridCellInfo.Item != null) { object item = dataGridCellInfo.Item; FrameworkElement element = templeColumn.GetCellContent(item); if (element != null) { DataGrid dataGrid2 = (DataGrid)templeColumn.CellTemplate.FindName("DataGrid2", element); dataGrid2.ItemsSource = characterlist; DataGridRow row = (DataGridRow)dataGrid2.ItemContainerGenerator.ContainerFromIndex(2); row.Visibility = Visibility.Collapsed; } } } } } } public class Person { public int id { get; set; } public string name { get; set; } public int age { get; set; } public int TotalCount { get; set; } } public class Character { public string name { get; set; } } }
效果图：
点击TextBox后再点击DataGrid效果图：
