C# WPF绑定到资源中的元素

我无法使列表框元素始终可见

我有一个列表框，您可以在其中选择DataGrid。显示的名称绑定到DataGrid标记。选定的DataGrid显示在下面。DataGrid名称，或者更确切地说，它的标记绑定到内容类中的数组。问题是列表框元素在您选择它们之前是不可见的，当您选择它们时，只显示选定项的名称

当我选择第二个元素时，第一个元素不再显示，反之亦然

这是我的密码：

XAML：

C:

---

您可以通过定义来解决此问题

给你的窗口起个名字。例如x:Name=MyWindow。 定义数据网格的绑定，使其源为MyWindow：

Tag={Binding Path=DataContext.GridNames[0]，Source={x:Reference MyWindow}

结果:

以下是完整的XAML：

<Window x:Class="WpfApp6.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:WpfApp6"
    xmlns:collections="clr-namespace:System.Collections;assembly=mscorlib"
    mc:Ignorable="d"
    Title="MainWindow" Height="350" Width="525" x:Name="MyWindow">
<Window.Resources>
    <collections:ArrayList x:Key="dataGridDef">
        <DataGrid Name="DG1" ItemsSource="{Binding Path=List1}" AutoGenerateColumns="False" Tag="{Binding Path=DataContext.GridNames[0], Source={x:Reference MyWindow}}">
            <DataGrid.Columns>
                <DataGridTextColumn Header="Grid1Name1" Binding="{Binding Path=Name1}"/>
            </DataGrid.Columns>
        </DataGrid>
        <DataGrid Name="DG2" ItemsSource="{Binding Path=List2}"  AutoGenerateColumns="False" Tag="{Binding Path=DataContext.GridNames[1], Source={x:Reference MyWindow}}">
            <DataGrid.Columns>
                <DataGridTextColumn Header="Grid2Name1" Binding="{Binding Path=Name1}"/>
            </DataGrid.Columns>
        </DataGrid>
    </collections:ArrayList>
</Window.Resources>
<StackPanel>
    <ListBox x:Name="lb" ItemsSource="{StaticResource dataGridDef}" DisplayMemberPath="Tag" SelectedValue="{Binding Path=SelectedGrid, Mode=TwoWay}"/>
    <ContentControl Content="{Binding ElementName=lb, Path=SelectedItem}"/>
    <TextBlock Height="100" Text="{Binding Path=Str.Header}"/>
    <TextBlock Text="{Binding Path=SelectedGrid.Tag}"/>
</StackPanel>

public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            DataContext = new Content();
        }
    }

    public class Content
    {
        public ObservableCollection<Asd> List1 { get; set; }
        public ObservableCollection<Asd> List2 { get; set; }
        public DataGrid SelectedGrid { get; set; }

        private string[] _gridName;
        public string[] GridNames { get { return _gridName; } }

        public Content()
        {
            List1 = new ObservableCollection<Asd>();
            List2 = new ObservableCollection<Asd>();
            List1.Add(new Asd { Name1 = "1" });
            List1.Add(new Asd { Name1 = "2" });
            List2.Add(new Asd { Name1 = "a" });
            List2.Add(new Asd { Name1 = "b" });
            _gridName = new string[] { "G1", "G2" };
        }
    }
    public class Asd: INotifyPropertyChanged
    {
        private string _name1;
        public string Name1
        {
            get { return _name1; }
            set
            {
                if (value == _name1) return;
                _name1 = value;
                OnPropertyChanged(nameof(Name1));
            }
        }
        public event PropertyChangedEventHandler PropertyChanged;
        internal void OnPropertyChanged(string propertyName)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }
    }

<Window x:Class="WpfApp6.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:WpfApp6"
    xmlns:collections="clr-namespace:System.Collections;assembly=mscorlib"
    mc:Ignorable="d"
    Title="MainWindow" Height="350" Width="525" x:Name="MyWindow">
<Window.Resources>
    <collections:ArrayList x:Key="dataGridDef">
        <DataGrid Name="DG1" ItemsSource="{Binding Path=List1}" AutoGenerateColumns="False" Tag="{Binding Path=DataContext.GridNames[0], Source={x:Reference MyWindow}}">
            <DataGrid.Columns>
                <DataGridTextColumn Header="Grid1Name1" Binding="{Binding Path=Name1}"/>
            </DataGrid.Columns>
        </DataGrid>
        <DataGrid Name="DG2" ItemsSource="{Binding Path=List2}"  AutoGenerateColumns="False" Tag="{Binding Path=DataContext.GridNames[1], Source={x:Reference MyWindow}}">
            <DataGrid.Columns>
                <DataGridTextColumn Header="Grid2Name1" Binding="{Binding Path=Name1}"/>
            </DataGrid.Columns>
        </DataGrid>
    </collections:ArrayList>
</Window.Resources>
<StackPanel>
    <ListBox x:Name="lb" ItemsSource="{StaticResource dataGridDef}" DisplayMemberPath="Tag" SelectedValue="{Binding Path=SelectedGrid, Mode=TwoWay}"/>
    <ContentControl Content="{Binding ElementName=lb, Path=SelectedItem}"/>
    <TextBlock Height="100" Text="{Binding Path=Str.Header}"/>
    <TextBlock Text="{Binding Path=SelectedGrid.Tag}"/>
</StackPanel>