C# 无法为驻留在DataGrid的RowDetail中的DataGrid绑定列_C#_Wpf_Xaml_Mvvm_Datagrid

C# 无法为驻留在DataGrid的RowDetail中的DataGrid绑定列

c# wpf xaml mvvm

C# 无法为驻留在DataGrid的RowDetail中的DataGrid绑定列,c#,wpf,xaml,mvvm,datagrid,C#,Wpf,Xaml,Mvvm,Datagrid,因此，我必须构建一个UserControl来保存DataGrid。DataGrid的每个Row将有另一个DataGrid分别保存该行的详细信息最初，由于列不是DP，我在将数据网格的列从调用者绑定到用户控件时遇到了一些问题，然后我通过附加属性克服了这个问题这就是示例的外观 main window.xaml <Grid> <local:CustomDataGrid > <local:CustomDataGrid.Columns>

因此，我必须构建一个

UserControl

来保存

DataGrid

。

DataGrid

的每个

Row

将有另一个

DataGrid

分别保存该行的详细信息

最初，由于

列

不是DP，我在将

数据网格

的

列

从调用者绑定到

用户控件

时遇到了一些问题，然后我通过附加属性克服了这个问题

这就是示例的外观

main window.xaml

<Grid>
    <local:CustomDataGrid >
        <local:CustomDataGrid.Columns>
            <DataGridTextColumn Header="Emp Name" Binding="{Binding Name}" />
        </local:CustomDataGrid.Columns>
        <local:CustomDataGrid.RowDetailColumns>
            <DataGridTextColumn Header="Manager Name" Binding="{Binding ManagerName}" />
        </local:CustomDataGrid.RowDetailColumns>
    </local:CustomDataGrid>
</Grid>

<Grid>
    <DataGrid ItemsSource="{Binding Employees}" local:DataGridColumnsBehavior.BindableColumns="{Binding Columns, RelativeSource={RelativeSource AncestorType=UserControl}}">
        <DataGrid.RowDetailsTemplate>
            <DataTemplate>
                <DataGrid ItemsSource="{Binding Details}" local:DataGridColumnsBehavior.BindableColumns="{Binding RowDetailColumns, RelativeSource={RelativeSource AncestorType=UserControl}}"/>
            </DataTemplate>
        </DataGrid.RowDetailsTemplate>
    </DataGrid>  
</Grid>

MainWindow.xaml.cs

/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
        var emps = new List<Employee>();
        emps.Add(new Employee() { ID = 1, Name = "aaa", Details = new List<Manager>() { new Manager() { ManagerID = 11, ManagerName = "Maaa" }, new Manager() { ManagerID = 22, ManagerName = "Mbbb" }, new Manager() { ManagerID = 33, ManagerName = "Mccc" } } });
        emps.Add(new Employee() { ID = 1, Name = "aaa", Details = new List<Manager>() { new Manager() { ManagerID = 11, ManagerName = "Maaa" }, new Manager() { ManagerID = 22, ManagerName = "Mbbb" }, new Manager() { ManagerID = 33, ManagerName = "Mccc" } } });
        emps.Add(new Employee() { ID = 1, Name = "aaa", Details = new List<Manager>() { new Manager() { ManagerID = 11, ManagerName = "Maaa" }, new Manager() { ManagerID = 22, ManagerName = "Mbbb" }, new Manager() { ManagerID = 33, ManagerName = "Mccc" } } });
        emps.Add(new Employee() { ID = 1, Name = "aaa", Details = new List<Manager>() { new Manager() { ManagerID = 11, ManagerName = "Maaa" }, new Manager() { ManagerID = 22, ManagerName = "Mbbb" }, new Manager() { ManagerID = 33, ManagerName = "Mccc" } } });
        Employees = emps;
        this.DataContext = this;
    }

    public List<Employee> Employees { get; set; }
}

public class Employee
{
    public int ID { get; set; }
    public string Name { get; set; }
    public List<Manager> Details { get; set; }
}

public class Manager
{
    public int ManagerID { get; set; }
    public string ManagerName { get; set; }
}

/// <summary>
/// Interaction logic for CustomDataGrid.xaml
/// </summary>
public partial class CustomDataGrid : UserControl
{
    public CustomDataGrid()
    {
        InitializeComponent();
        Columns = new ObservableCollection<DataGridColumn>();
        RowDetailColumns = new ObservableCollection<DataGridColumn>();
    }

    public static DependencyProperty ColumnsProperty =
               DependencyProperty.Register("Columns"
                   , typeof(ObservableCollection<DataGridColumn>)
                   , typeof(CustomDataGrid));


    public static DependencyProperty RowDetailColumnsProperty =
              DependencyProperty.Register("RowDetailColumns"
                  , typeof(ObservableCollection<DataGridColumn>)
                  , typeof(CustomDataGrid));

    public ObservableCollection<DataGridColumn> Columns
    {
        get { return (ObservableCollection<DataGridColumn>)GetValue(ColumnsProperty); }
        set { SetValue(ColumnsProperty, value); }
    }

    public ObservableCollection<DataGridColumn> RowDetailColumns
    {
        get { return (ObservableCollection<DataGridColumn>)GetValue(RowDetailColumnsProperty); }
        set { SetValue(RowDetailColumnsProperty, value); }
    }
}

//
///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（）；
var emps=新列表（）；
emps.Add（new Employee（）{ID=1，Name=“aaa”，Details=new List（）{new Manager（）{ManagerID=11，ManagerName=“Maaa”}，new Manager（）{ManagerID=22，ManagerName=“Mbbb”}，new Manager（）{ManagerID=33，ManagerName=“Mccc”}}）；
emps.Add（new Employee（）{ID=1，Name=“aaa”，Details=new List（）{new Manager（）{ManagerID=11，ManagerName=“Maaa”}，new Manager（）{ManagerID=22，ManagerName=“Mbbb”}，new Manager（）{ManagerID=33，ManagerName=“Mccc”}}）；
emps.Add（new Employee（）{ID=1，Name=“aaa”，Details=new List（）{new Manager（）{ManagerID=11，ManagerName=“Maaa”}，new Manager（）{ManagerID=22，ManagerName=“Mbbb”}，new Manager（）{ManagerID=33，ManagerName=“Mccc”}}）；
emps.Add（new Employee（）{ID=1，Name=“aaa”，Details=new List（）{new Manager（）{ManagerID=11，ManagerName=“Maaa”}，new Manager（）{ManagerID=22，ManagerName=“Mbbb”}，new Manager（）{ManagerID=33，ManagerName=“Mccc”}}）；
雇员=环境管理计划；
this.DataContext=this；
}
公共列表雇员{get；set；}
}
公营雇员
{
公共int ID{get；set；}
公共字符串名称{get；set；}
公共列表详细信息{get；set；}
}
公共班级经理
{
public int ManagerID{get；set；}
公共字符串管理器名称{get；set；}
}

CustomDataGrid.xaml

<Grid>
    <local:CustomDataGrid >
        <local:CustomDataGrid.Columns>
            <DataGridTextColumn Header="Emp Name" Binding="{Binding Name}" />
        </local:CustomDataGrid.Columns>
        <local:CustomDataGrid.RowDetailColumns>
            <DataGridTextColumn Header="Manager Name" Binding="{Binding ManagerName}" />
        </local:CustomDataGrid.RowDetailColumns>
    </local:CustomDataGrid>
</Grid>

<Grid>
    <DataGrid ItemsSource="{Binding Employees}" local:DataGridColumnsBehavior.BindableColumns="{Binding Columns, RelativeSource={RelativeSource AncestorType=UserControl}}">
        <DataGrid.RowDetailsTemplate>
            <DataTemplate>
                <DataGrid ItemsSource="{Binding Details}" local:DataGridColumnsBehavior.BindableColumns="{Binding RowDetailColumns, RelativeSource={RelativeSource AncestorType=UserControl}}"/>
            </DataTemplate>
        </DataGrid.RowDetailsTemplate>
    </DataGrid>  
</Grid>

CustomDataGrid.xaml.cs

/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
        var emps = new List<Employee>();
        emps.Add(new Employee() { ID = 1, Name = "aaa", Details = new List<Manager>() { new Manager() { ManagerID = 11, ManagerName = "Maaa" }, new Manager() { ManagerID = 22, ManagerName = "Mbbb" }, new Manager() { ManagerID = 33, ManagerName = "Mccc" } } });
        emps.Add(new Employee() { ID = 1, Name = "aaa", Details = new List<Manager>() { new Manager() { ManagerID = 11, ManagerName = "Maaa" }, new Manager() { ManagerID = 22, ManagerName = "Mbbb" }, new Manager() { ManagerID = 33, ManagerName = "Mccc" } } });
        emps.Add(new Employee() { ID = 1, Name = "aaa", Details = new List<Manager>() { new Manager() { ManagerID = 11, ManagerName = "Maaa" }, new Manager() { ManagerID = 22, ManagerName = "Mbbb" }, new Manager() { ManagerID = 33, ManagerName = "Mccc" } } });
        emps.Add(new Employee() { ID = 1, Name = "aaa", Details = new List<Manager>() { new Manager() { ManagerID = 11, ManagerName = "Maaa" }, new Manager() { ManagerID = 22, ManagerName = "Mbbb" }, new Manager() { ManagerID = 33, ManagerName = "Mccc" } } });
        Employees = emps;
        this.DataContext = this;
    }

    public List<Employee> Employees { get; set; }
}

public class Employee
{
    public int ID { get; set; }
    public string Name { get; set; }
    public List<Manager> Details { get; set; }
}

public class Manager
{
    public int ManagerID { get; set; }
    public string ManagerName { get; set; }
}

/// <summary>
/// Interaction logic for CustomDataGrid.xaml
/// </summary>
public partial class CustomDataGrid : UserControl
{
    public CustomDataGrid()
    {
        InitializeComponent();
        Columns = new ObservableCollection<DataGridColumn>();
        RowDetailColumns = new ObservableCollection<DataGridColumn>();
    }

    public static DependencyProperty ColumnsProperty =
               DependencyProperty.Register("Columns"
                   , typeof(ObservableCollection<DataGridColumn>)
                   , typeof(CustomDataGrid));


    public static DependencyProperty RowDetailColumnsProperty =
              DependencyProperty.Register("RowDetailColumns"
                  , typeof(ObservableCollection<DataGridColumn>)
                  , typeof(CustomDataGrid));

    public ObservableCollection<DataGridColumn> Columns
    {
        get { return (ObservableCollection<DataGridColumn>)GetValue(ColumnsProperty); }
        set { SetValue(ColumnsProperty, value); }
    }

    public ObservableCollection<DataGridColumn> RowDetailColumns
    {
        get { return (ObservableCollection<DataGridColumn>)GetValue(RowDetailColumnsProperty); }
        set { SetValue(RowDetailColumnsProperty, value); }
    }
}

//
///CustomDataGrid.xaml的交互逻辑
/// 
公共部分类CustomDataGrid:UserControl
{
公共CustomDataGrid（）
{
初始化组件（）；
Columns=新的ObservableCollection（）；
RowDetailColumns=新的ObservableCollection（）；
}
公共静态从属属性列属性=
DependencyProperty.Register（“列”
，类型（可观测采集）
，typeof（CustomDataGrid））；
公共静态从属属性RowDetails ColumnSProperty=
DependencyProperty.Register（“RowDetailColumns”
，类型（可观测采集）
，typeof（CustomDataGrid））；
公共可观测收集列
{
get{return（ObservableCollection）GetValue（ColumnsProperty）；}
set{SetValue（ColumnsProperty，value）；}
}
公共ObservableCollection行详细信息列
{
get{return（ObservableCollection）GetValue（RowDetailColumnsProperty）；}
set{SetValue（rowdailColumnsProperty，value）；}
}
}

DataGridColumnsBehavior.cs///列的附加属性

public static class DataGridColumnsBehavior
{
    public static readonly DependencyProperty BindableColumnsProperty =
        DependencyProperty.RegisterAttached("BindableColumns",
                                            typeof(ObservableCollection<DataGridColumn>),
                                            typeof(DataGridColumnsBehavior),
                                            new UIPropertyMetadata(null, BindableColumnsPropertyChanged));
    private static void BindableColumnsPropertyChanged(DependencyObject source, DependencyPropertyChangedEventArgs e)
    {
        DataGrid dataGrid = source as DataGrid;
        ObservableCollection<DataGridColumn> columns = e.NewValue as ObservableCollection<DataGridColumn>;
        dataGrid.Columns.Clear();
        if (columns == null)
        {
            return;
        }
        foreach (DataGridColumn column in columns)
        {
            dataGrid.Columns.Add(column);
        }
        columns.CollectionChanged += (sender, e2) =>
        {
            NotifyCollectionChangedEventArgs ne = e2 as NotifyCollectionChangedEventArgs;
            if (ne.Action == NotifyCollectionChangedAction.Reset)
            {
                dataGrid.Columns.Clear();
                if (ne.NewItems != null)
                {
                    foreach (DataGridColumn column in ne.NewItems)
                    {
                        dataGrid.Columns.Add(column);
                    }
                }
            }
            else if (ne.Action == NotifyCollectionChangedAction.Add)
            {
                foreach (DataGridColumn column in ne.NewItems)
                {
                    dataGrid.Columns.Add(column);
                }
            }
            else if (ne.Action == NotifyCollectionChangedAction.Move)
            {
                dataGrid.Columns.Move(ne.OldStartingIndex, ne.NewStartingIndex);
            }
            else if (ne.Action == NotifyCollectionChangedAction.Remove)
            {
                foreach (DataGridColumn column in ne.OldItems)
                {
                    dataGrid.Columns.Remove(column);
                }
            }
            else if (ne.Action == NotifyCollectionChangedAction.Replace)
            {
                dataGrid.Columns[ne.NewStartingIndex] = ne.NewItems[0] as DataGridColumn;
            }
        };
    }
    public static void SetBindableColumns(DependencyObject element, ObservableCollection<DataGridColumn> value)
    {
        element.SetValue(BindableColumnsProperty, value);
    }
    public static ObservableCollection<DataGridColumn> GetBindableColumns(DependencyObject element)
    {
        return (ObservableCollection<DataGridColumn>)element.GetValue(BindableColumnsProperty);
    }
}

公共静态类DataGridColumnsBehavior
{
公共静态只读从属属性BindableColumnsProperty=
DependencyProperty.RegisterAttached（“BindableColumns”，
类型（可观测采集），
类型（DataGridColumnsBehavior），
新的UIPropertyMetadata（null，BindableColumnsPropertyChanged））；
私有静态void BindableColumnsPropertyChanged（DependencyObject源，DependencyPropertyChangedEventArgs e）
{
DataGrid DataGrid=源作为DataGrid；
ObservableCollection columns=e.NewValue作为ObservableCollection；
dataGrid.Columns.Clear（）；
如果（列==null）
{
返回；
}
foreach（列中的DataGridColumn列）
{
dataGrid.Columns.Add（column）；
}
columns.CollectionChanged+=（发送方，e2）=>
{
NotifyCollectionChangedEventArgs ne=e2作为NotifyCollectionChangedEventArgs；
if（ne.Action==NotifyCollectionChangedAction.Reset）
{
dataGrid.Columns.Clear（）；
如果（ne.NewItems！=null）
{
foreach（ne.NewItems中的DataGridColumn列）
{
dataGrid.Columns.Add（column）；
}
}
}
else if（ne.Action==NotifyCollectionChangedAction.Add）
{
foreach（ne.NewItems中的DataGridColumn列）
{
dataGrid.Columns.Add（column）；
}
}
else if（ne.Action==NotifyCollectionChangedAction.Move）
{
dataGrid.Columns.Move（ne.OldStartingIndex，ne.NewStartingIndex）；
}
else if（ne.Action==NotifyCollectionChangedAction.Remove）
{
foreach（ne.OldItems中的DataGridColumn列）
{
dataGrid.Columns.Remove（column）；
}
}
else if（ne.Action==NotifyCollectionChangedAction.Replace）
{
dataGrid.Columns[ne.NewStartingIndex]=ne.NewItems[0]作为DataGridColumn；
}
};
}