C# 如何动态绑定具有ItemTemplateSelector的ListView的ItemSource,该ItemTemplateSelector包含多个具有不同数据类型的DataTemplates?

C# 如何动态绑定具有ItemTemplateSelector的ListView的ItemSource,该ItemTemplateSelector包含多个具有不同数据类型的DataTemplates?,c#,uwp,uwp-xaml,datatemplateselector,itemsource,C#,Uwp,Uwp Xaml,Datatemplateselector,Itemsource,我有一个ItemTemplateSelector,它包含多个具有不同数据类型的数据模板。 因此,基于所选模块,我有多个ItemSources。 如何根据所选模块将我的ListView与多个ItemSources绑定 说明: 1) 当选择我的模块A时,ViewModel_A是我的ItemSource,DataTemplateA是我的DataTemplate 2) ViewModel_B是我的ItemSource DataTemplateB是选中我的模块B时的我的DataTemplate 我尝试实现

我有一个ItemTemplateSelector,它包含多个具有不同数据类型的数据模板。 因此,基于所选模块,我有多个ItemSources。 如何根据所选模块将我的ListView与多个ItemSources绑定

说明:

1) 当选择我的模块A时,ViewModel_A是我的ItemSource,DataTemplateA是我的DataTemplate

2) ViewModel_B是我的ItemSource DataTemplateB是选中我的模块B时的我的DataTemplate

我尝试实现BaseViewModel并尝试在ItemSource中绑定BaseViewModel类型,但这不允许访问派生类属性

如何动态选择我的ItemSource?

步骤1 首先创建一个
UserControl
,其中包含Xaml中的
ListView
,以及
ItemSource
DataTemplate的两个
DependencyProperty

DataList.Xaml

<UserControl
x:Class="MultipleDataTemplate.DataList"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
>

   <Grid>
   <ListView ItemsSource="{x:Bind ItemsSource,Mode=OneWay}"></ListView>
   </Grid>
</UserControl>
<Page
    x:Class="MultipleDataTemplate.Cars"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

    xmlns:controls="using:MultipleDataTemplate">
    <Page.Resources>
        <DataTemplate x:Key="CarKey" x:DataType="controls:Car">
            <Grid>
                <TextBlock Text="{x:Bind carprop1}"></TextBlock>
                <TextBlock Text="{x:Bind carprop2}"></TextBlock>

            </Grid>
        </DataTemplate>
        <DataTemplate x:Key="BikeKey" x:DataType="controls:Bike">
            <Grid>
                <TextBlock Text="{x:Bind Bikeprop1}"></TextBlock>
                <TextBlock Text="{x:Bind Bikeprop2}"></TextBlock>

            </Grid>
        </DataTemplate>
    </Page.Resources>
    <Grid>        
        <controls:DataList ItemsSource="{x:Bind ItemSource,Mode=OneWay}" ItemTemplate="{x:Bind ItemTemplate}"></controls:DataList>
        <StackPanel>
            <Button Content="Cars" Click="CarsClick"/>
            <Button Content="Bike" Click="BikeClick"/>
        </StackPanel>
    </Grid>
</Page>
步骤2 现在,您可以使用任意多个DataTemplate和多个itemsource来创建此usercontrol,如下所示

MainPage.xaml

<UserControl
x:Class="MultipleDataTemplate.DataList"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
>

   <Grid>
   <ListView ItemsSource="{x:Bind ItemsSource,Mode=OneWay}"></ListView>
   </Grid>
</UserControl>
<Page
    x:Class="MultipleDataTemplate.Cars"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

    xmlns:controls="using:MultipleDataTemplate">
    <Page.Resources>
        <DataTemplate x:Key="CarKey" x:DataType="controls:Car">
            <Grid>
                <TextBlock Text="{x:Bind carprop1}"></TextBlock>
                <TextBlock Text="{x:Bind carprop2}"></TextBlock>

            </Grid>
        </DataTemplate>
        <DataTemplate x:Key="BikeKey" x:DataType="controls:Bike">
            <Grid>
                <TextBlock Text="{x:Bind Bikeprop1}"></TextBlock>
                <TextBlock Text="{x:Bind Bikeprop2}"></TextBlock>

            </Grid>
        </DataTemplate>
    </Page.Resources>
    <Grid>        
        <controls:DataList ItemsSource="{x:Bind ItemSource,Mode=OneWay}" ItemTemplate="{x:Bind ItemTemplate}"></controls:DataList>
        <StackPanel>
            <Button Content="Cars" Click="CarsClick"/>
            <Button Content="Bike" Click="BikeClick"/>
        </StackPanel>
    </Grid>
</Page>

MainPage.xaml.cs

public sealed partial class DataList : UserControl
{
    public DataList()
    {
        this.InitializeComponent();
    }
    #region ItemsSource
    public object ItemsSource
    {
        get { return (object)GetValue(ItemsSourceProperty); }
        set {  SetValue(ItemsSourceProperty, value); }
    }              
    public static readonly DependencyProperty ItemsSourceProperty = DependencyProperty.Register(nameof(ItemsSource), typeof(object), typeof(DataList), new PropertyMetadata(null));
    #endregion
    #region ItemTemplate
    public DataTemplate ItemTemplate
    {
        get { return (DataTemplate)GetValue(ItemTemplateProperty); }
        set { SetValue(ItemTemplateProperty, value); }
    }

    public static readonly DependencyProperty ItemTemplateProperty = DependencyProperty.Register(nameof(ItemTemplate), typeof(DataTemplate), typeof(DataList), new PropertyMetadata(null));
    #endregion
}
public sealed partial class Cars : Page, INotifyPropertyChanged
{
    public object _ItemSource { get; set; }

    public object ItemSource
    {
        get { return _ItemSource; }
        set
        {
            _ItemSource = value;
            this.OnPropertyChanged();
        }
    }
    public DataTemplate _itemTemplate { get; set; }

    public DataTemplate ItemTemplate
    {
        get { return _itemTemplate; }
        set
        {
            _itemTemplate = value;
            this.OnPropertyChanged();
        }
    }
    public Cars()
    {
        this.InitializeComponent();
    }
    public void OnPropertyChanged([CallerMemberName] string propertyName = null)
    {
        this.PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
    }
    public event PropertyChangedEventHandler PropertyChanged;


    private void CarsClick(object sender, RoutedEventArgs e)
    {
        ItemSource = new List<Car>() { new Car() { carprop1 = "1", carprop2 = "2" } };
        ItemTemplate = this.Resources["CarKey"] as DataTemplate;
    }

    private void BikeClick(object sender, RoutedEventArgs e)
    {
        ItemSource = new List<Bike>() { new Bike() { Bikeprop1 = "1", Bikeprop2 = "2" } };
        ItemTemplate = this.Resources["BikeKey"] as DataTemplate;
    }
}
public class Car
{
    public string carprop1 { get; set; }
    public string carprop2 { get; set; }
}
public class Bike
{
    public string Bikeprop1 { get; set; }
    public string Bikeprop2 { get; set; }
}
公共密封部分等级车辆:第页,INotifyPropertyChanged
{
公共对象_ItemSource{get;set;}
公共对象项源
{
获取{return\u ItemSource;}
设置
{
_ItemSource=值;
this.OnPropertyChanged();
}
}
公共数据模板_itemTemplate{get;set;}
公共数据模板ItemTemplate
{
获取{return\u itemTemplate;}
设置
{
_itemTemplate=值;
this.OnPropertyChanged();
}
}
公共汽车
{
this.InitializeComponent();
}
public void OnPropertyChanged([CallerMemberName]字符串propertyName=null)
{
this.PropertyChanged(this,newpropertychangedventargs(propertyName));
}
公共事件属性更改事件处理程序属性更改;
专用无效车辆单击(对象发送者,路由目标e)
{
ItemSource=new List(){new Car(){carprop1=“1”,carprop2=“2”};
ItemTemplate=this.Resources[“CarKey”]作为DataTemplate;
}
私有void bikelick(对象发送方,路由目标)
{
ItemSource=new List(){new Bike(){Bikeprop1=“1”,Bikeprop2=“2”};
ItemTemplate=this.Resources[“BikeKey”]作为DataTemplate;
}
}
公车
{
公共字符串carprop1{get;set;}
公共字符串carprop2{get;set;}
}
公共级自行车
{
公共字符串Bikeprop1{get;set;}
公共字符串Bikeprop2{get;set;}
}

你能用2个项目来源的例子解释一下吗?当然,我会把它添加到解决方案中