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C# 如何使用MVVM将数据正确绑定到WPF按钮_C#_Wpf_Mvvm - Fatal编程技术网

C# 如何使用MVVM将数据正确绑定到WPF按钮

C# 如何使用MVVM将数据正确绑定到WPF按钮,c#,wpf,mvvm,C#,Wpf,Mvvm,这是我的设置,似乎我没有正确绑定数据。结果应该是显示图像和文本的按钮。没有显示任何内容 <UserControl x:Class="AmebaPrototype.UI.LandingPivot.featureControl" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/x

这是我的设置,似乎我没有正确绑定数据。结果应该是显示图像和文本的按钮。没有显示任何内容

<UserControl x:Class="AmebaPrototype.UI.LandingPivot.featureControl"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
         mc:Ignorable="d" 
         d:DesignHeight="330" d:DesignWidth="960"
         DataContext="{Binding Source={StaticResource viewModelLocator}, Path=VideoViewModel}"
         >
<UserControl.Resources >
    <DataTemplate x:Key="custTemplate" >
        <StackPanel >
            <Image Source="{Binding ImagePath}"/>
            <TextBlock Text="{Binding MyTitle}"/>
        </StackPanel>          
    </DataTemplate>
</UserControl.Resources>

<Grid x:Name="LayoutRoot" Background="{x:Null}" >
    <Button Content="Button" Height="316" 
            HorizontalAlignment="Left" Margin="12,2,0,0" 
            Name="button1" VerticalAlignment="Top" 
            Width="423" Click="button1_Click" 
            ContentTemplate="{DynamicResource custTemplate}"
            />
    <Button Content="Button" Height="156" HorizontalAlignment="Left" Margin="441,2,0,0" Name="button2" VerticalAlignment="Top" Width="208" Click="button2_Click" />
    <Button Content="Button" Height="156" HorizontalAlignment="Left" Margin="669,2,0,0" Name="button3" VerticalAlignment="Top" Width="208" />
    <Button Content="Button" Height="156" HorizontalAlignment="Left" Margin="441,162,0,0" Name="button4" VerticalAlignment="Top" Width="208" />
    <Button Content="Button" Height="156" HorizontalAlignment="Left" Margin="669,162,0,0" Name="button5" VerticalAlignment="Top" Width="208" />
</Grid>

视图模型

  public ViewModel VideoViewModel 
    {
        get 
        {
            if(viewmodel == null)
            {
                viewmodel = new ViewModel();
                viewmodel.ListData.Clear();
                viewmodel.ListData.Add(new Video { MyTitle = "Title1", ImagePath = "exampleimage.com/image.png" });
                 viewmodel.ListData.Add(new Video { MyTitle = "Title2", ImagePath = "exampleimage.com/image.png" });

            }

            return viewmodel;
        }
    }

如果确实希望使用DataTemplate执行此操作,则:

<Button>
        <Button.Content>
            <x:Type TypeName="Visual"/>
        </Button.Content>
        <Button.Template>
            <ControlTemplate TargetType="{x:Type Button}">
                <Grid>
                    <ContentPresenter ContentSource="Content"/>
                </Grid>
            </ControlTemplate>
        </Button.Template>
        <Button.ContentTemplate>
            <DataTemplate>
                <TextBlock Text="{Binding Path=Name}"/>
            </DataTemplate>
        </Button.ContentTemplate>
    </Button>


您的ViewModel绑定应该可以在此处使用,因此在DataTemplate中,您可以调整它以包含图像和文本块。

参考资料中的DataTemplate:

<DataTemplate x:Key="bTemplate">
        <Button Label="{Binding MyTitle}" 
                Command="{Binding Execute}"> 
           <Image Source="{Binding ImagePath}"   />
        </Button>
 </DataTemplate>

与您的问题不完全一样,但是您可以使用一个控件,该控件接受ItemSource,例如ListView:

<ListView 
  ItemsSource="{Binding ListData}"  
  ItemTemplate="{StaticResource bTemplate}" 
>
</ListView>


我添加了一个命令,因为如果您想实现MVVM而不是事件单击,这是必需的。

您的
VideoViewModel
看起来怎么样?因为在
UserControl
DataContext
中,您绑定到了
VideoViewModel
,它不是
Video
类本身,而是包含(我猜)一个类型为
Video
的属性。运行程序时,请检查此链接以使用MVVM与按钮绑定,请查看Visual Studio中的输出面板。有BindingExpression错误吗?@nemesv我刚刚用ViewModel@GregSansom不,没有错误我以前用ListView和ListBox实现过,但现在我只需要实现一个按钮。i、 e没有列表视图或其他布局。什么是x?参考。我试过了,但它不允许我将其设置为x:Type。
<ListView 
  ItemsSource="{Binding ListData}"  
  ItemTemplate="{StaticResource bTemplate}" 
>
</ListView>