C# WPF:从DataGrid.RowDetailsTemplate获取指定控件的所有列表
我有mainC# WPF:从DataGrid.RowDetailsTemplate获取指定控件的所有列表,c#,wpf,xaml,datagrid,C#,Wpf,Xaml,Datagrid,我有mainDataGrid用于显示文档列表。 此MainGrid在XAML中指定了DataGrid.RowDetailsTemplate 此DataGrid.RowDetailsTemplate包含一个或多个(内部或嵌套)DataGrids 因此,MainGrid的每一行都包含DataGrid.RowDetailsTemplate和内部DataGrid 我需要获取所有内部(嵌套的)DataGrids的列表,其中只有MainGrid引用。 我已经尝试了Visual/Logil树帮助程序,但对于G
DataGrid
用于显示文档列表。
此MainGrid
在XAML
中指定了DataGrid.RowDetailsTemplate
此DataGrid.RowDetailsTemplate
包含一个或多个(内部或嵌套)DataGrid
s
因此,MainGrid
的每一行都包含DataGrid.RowDetailsTemplate
和内部DataGrid
我需要获取所有内部(嵌套的)DataGrid
s的列表,其中只有MainGrid
引用。
我已经尝试了Visual/Logil树帮助程序,但对于GetChildren调用,它们都不返回任何结果
从DataGrid.RowDetails
获取嵌套的DataGrid
的方法是什么
复制步骤:
1) 在Visual Studio 2013或更高版本中创建Windows桌面->WPF应用程序(空)
2) 使用下面的代码示例:
MainWindow.xaml
<Window x:Class="ExampleNestedGrid.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<ToolBar Grid.Row="0" Header="Action:">
<Button x:Name="RefreshBtn" Command="{Binding RefreshCommand}">Refresh</Button>
</ToolBar>
<DataGrid x:Name="MainGrid" ItemsSource="{Binding Documents}" AutoGenerateColumns="False" Grid.Row="1">
<DataGrid.Columns>
<DataGridTextColumn Binding="{Binding Name, Mode=OneWay}" Width="*"/>
<DataGridTextColumn Binding="{Binding Number, Mode=OneWay}" Width="*"/>
</DataGrid.Columns>
<DataGrid.RowDetailsTemplate>
<DataTemplate>
<Grid>
<DataGrid x:Name="NestedGrid" ItemsSource="{Binding LinkedEmployees}" AutoGenerateColumns="False">
<DataGrid.Columns>
<DataGridTextColumn Binding="{Binding Id, Mode=OneWay}" Width="150"/>
<DataGridTextColumn Binding="{Binding Name, Mode=OneWay}" Width="150"/>
<DataGridTextColumn Binding="{Binding Status, Mode=OneWay}" Width="150"/>
</DataGrid.Columns>
</DataGrid>
</Grid>
</DataTemplate>
</DataGrid.RowDetailsTemplate>
</DataGrid>
</Grid>
</Window>
刷新
MainWindow.xaml.cs
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Runtime.CompilerServices;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
namespace ExampleNestedGrid
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
DataContext = new DisplayViewModel(MainGrid);
}
}
public class DisplayViewModel : PropertyBase
{
private DataGrid MainGrid;
public DisplayViewModel(DataGrid MainGrid)
{
this.MainGrid = MainGrid;
Documents = new ObservableCollection<Document>();
LinkedEmployee empl1 = new LinkedEmployee("1", "Ben");
LinkedEmployee empl2 = new LinkedEmployee("2", "John");
Document doc = new Document("first", "111");
doc.LinkedEmployees.Add(empl1);
doc.LinkedEmployees.Add(empl2);
Documents.Add(doc);
RefreshCommand = new RefreshCommand(Documents, MainGrid);
}
public ObservableCollection<Document> Documents { get; set; }
public ICommand RefreshCommand { get; set; }
}
public sealed class LinkedEmployee : PropertyBase
{
public LinkedEmployee(string id, string name)
{
_id = id;
_name = name;
}
public void Update(string name)
{
Name = name;
}
private string _id;
private string _name;
private bool _status;
public bool Status
{
get { return _status; }
set
{
_status = value;
OnPropertyChanged();
}
}
public string Id
{
get { return _id; }
set
{
_id = value;
OnPropertyChanged();
}
}
public string Name
{
get { return _name; }
set
{
_name = value;
OnPropertyChanged();
}
}
}
public class Document : PropertyBase
{
public Document(string name, string number)
{
_name = name;
_number = number;
LinkedEmployees = new ObservableCollection<LinkedEmployee>();
}
public void Update(string number)
{
Number = number;
}
private string _name;
private string _number;
public virtual string Name
{
get { return _name; }
set
{
_name = value;
OnPropertyChanged();
}
}
public virtual string Number
{
get { return _number; }
set
{
_number = value;
OnPropertyChanged();
}
}
public ObservableCollection<LinkedEmployee> LinkedEmployees { get; set; }
}
public abstract class PropertyBase : INotifyPropertyChanged
{
#region public properties
public event PropertyChangedEventHandler PropertyChanged;
#endregion
#region protected methods
protected void OnPropertyChanged([CallerMemberName]string caller = null)
{
if (PropertyChanged != null)
PropertyChanged.Invoke(this, new PropertyChangedEventArgs(caller));
}
#endregion
}
}
使用System.Collections.ObjectModel;
使用系统组件模型;
使用System.Runtime.CompilerServices;
使用System.Windows;
使用System.Windows.Controls;
使用System.Windows.Input;
命名空间示例NestEdGrid
{
///
///MainWindow.xaml的交互逻辑
///
公共部分类主窗口:窗口
{
公共主窗口()
{
初始化组件();
DataContext=新的DisplayViewModel(主网格);
}
}
公共类DisplayViewModel:PropertyBase
{
私有数据网格主网格;
公共显示视图模型(DataGrid主网格)
{
this.MainGrid=MainGrid;
文档=新的ObservableCollection();
LinkedEmployee Employee 1=新的LinkedEmployee(“1”,“Ben”);
LinkedEmployee Employee 2=新的LinkedEmployee(“2”,“John”);
文件文件=新文件(“第一”、“111”);
doc.LinkedEmployees.Add(employ1);
doc.LinkedEmployees.Add(employ2);
文件。添加(doc);
RefreshCommand=新的RefreshCommand(文档,主网格);
}
公共可观察收集文档{get;set;}
公共ICommand刷新命令{get;set;}
}
公共密封类LinkedEmployee:PropertyBase
{
公共LinkedEmployee(字符串id、字符串名称)
{
_id=id;
_名称=名称;
}
公共无效更新(字符串名称)
{
名称=名称;
}
私有字符串_id;
私有字符串\u名称;
私人住房状况;
公共布尔状态
{
获取{return\u status;}
设置
{
_状态=价值;
OnPropertyChanged();
}
}
公共字符串Id
{
获取{return\u id;}
设置
{
_id=值;
OnPropertyChanged();
}
}
公共字符串名
{
获取{return\u name;}
设置
{
_名称=值;
OnPropertyChanged();
}
}
}
公共类文档:PropertyBase
{
公共文档(字符串名称、字符串编号)
{
_名称=名称;
_数字=数字;
LinkedEmployees=新的ObservableCollection();
}
公共无效更新(字符串编号)
{
数字=数字;
}
私有字符串\u名称;
私有字符串_编号;
公共虚拟字符串名
{
获取{return\u name;}
设置
{
_名称=值;
OnPropertyChanged();
}
}
公共虚拟字符串号
{
获取{return\u number;}
设置
{
_数字=数值;
OnPropertyChanged();
}
}
公共可观察集合LinkedEmployees{get;set;}
}
公共抽象类PropertyBase:INotifyPropertyChanged
{
#区域公共财产
公共事件属性更改事件处理程序属性更改;
#端区
#区域保护方法
受保护的void OnPropertyChanged([CallerMemberName]字符串调用者=null)
{
if(PropertyChanged!=null)
调用(这是新的PropertyChangedEventArgs(调用方));
}
#端区
}
}
RefreshCommand.cs
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Input;
using System.Windows.Media;
namespace ExampleNestedGrid
{
public class RefreshCommand : ICommand
{
private ObservableCollection<Document> Documents;
private System.Windows.Controls.DataGrid MainGrid;
#region public methods
public event EventHandler CanExecuteChanged
{
add { CommandManager.RequerySuggested += value; }
remove { CommandManager.RequerySuggested -= value; }
}
#endregion
#region public methods
public RefreshCommand(ObservableCollection<Document> Documents, System.Windows.Controls.DataGrid MainGrid)
{
// TODO: Complete member initialization
this.Documents = Documents;
this.MainGrid = MainGrid;
}
public void Execute(object parameter)
{
Documents.First().LinkedEmployees.First().Status = !Documents.First().LinkedEmployees.First().Status;
ICollectionView view = CollectionViewSource.GetDefaultView(Documents);
view.Filter = (item) => item != null;
MainGrid.ItemsSource = view;
var childGrids = FindVisualChildren<DataGrid>(MainGrid);
foreach (DataGrid childGrid in childGrids)
{
MessageBox.Show(childGrid.Name);
}
}
public bool CanExecute(object parameter)
{
return Documents != null && MainGrid != null;
}
#endregion
private static IEnumerable<T> FindVisualChildren<T>(DependencyObject depObj) where T : DependencyObject
{
if (depObj != null)
{
for (int i = 0; i < VisualTreeHelper.GetChildrenCount(depObj); i++)
{
DependencyObject child = VisualTreeHelper.GetChild(depObj, i);
if (child != null && child is T)
{
yield return (T)child;
}
foreach (T childOfChild in FindVisualChildren<T>(child))
{
yield return childOfChild;
}
}
}
}
}
}
使用系统;
使用System.Collections.Generic;
使用System.Collections.ObjectModel;
使用系统组件模型;
使用System.Linq;
使用系统文本;
使用System.Windows;
使用System.Windows.Controls;
使用System.Windows.Data;
使用System.Windows.Input;
使用System.Windows.Media;
命名空间示例NestEdGrid
{
公共类刷新命令:ICommand
{
私人收集文件;
private System.Windows.Controls.DataGrid主网格;
#区域公共方法
公共事件事件处理程序CanExecuteChanged
{
添加{CommandManager.RequerySuggested+=value;}
删除{CommandManager.RequerySuggested-=value;}
}
#端区
#区域公共方法
公共刷新命令(ObservableCollection文档,System.Windows.Controls.DataGrid MainGrid)
{
//TODO:完成成员初始化
本文件=文件;
private void Button_Click(object sender, RoutedEventArgs e)
{
var childGrids = FindVisualChildren<DataGrid>(MainGrid);
foreach (DataGrid childGrid in childGrids)
{
//...
}
}
private static IEnumerable<T> FindVisualChildren<T>(DependencyObject depObj) where T : DependencyObject
{
if (depObj != null)
{
for (int i = 0; i < VisualTreeHelper.GetChildrenCount(depObj); i++)
{
DependencyObject child = VisualTreeHelper.GetChild(depObj, i);
if (child != null && child is T)
{
yield return (T)child;
}
foreach (T childOfChild in FindVisualChildren<T>(child))
{
yield return childOfChild;
}
}
}
}
public void Execute(object parameter)
{
Documents.First().LinkedEmployees.First().Status = !Documents.First().LinkedEmployees.First().Status;
ICollectionView view = CollectionViewSource.GetDefaultView(Documents);
view.Filter = (item) => item != null;
MainGrid.ItemsSource = view;
MainGrid.UpdateLayout();
List<DataGrid> childGrids = new List<DataGrid>();
foreach (var item in MainGrid.Items)
{
var container = MainGrid.ItemContainerGenerator.ContainerFromItem(item) as DataGridRow;
if (container != null)
{
childGrids.AddRange(FindVisualChildren<DataGrid>(container));
}
}
}