完整图片的用户控件

Question

我想做一个类似在Facebook上查看图像的模拟。当您单击图像并在弹出窗口中打开它时，主要问题是带有图片链接的源是集合中的另一个用户控件。 / p>

因此，我对此用户控件具有调光功能。

<Grid Background="#33000000" HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
        <Grid HorizontalAlignment="Center" VerticalAlignment="Center" Background="#FFFFFF" MinHeight="100" MinWidth="200">
            <Grid.RowDefinitions>
                <RowDefinition Height="30"></RowDefinition>
                <RowDefinition Height="*"></RowDefinition>
                <RowDefinition Height="35"></RowDefinition>
            </Grid.RowDefinitions>
            <Grid Grid.Row="0" Background="#EEEEEE">
                <Label Content="{Binding Title}" HorizontalAlignment="Center" VerticalAlignment="Center" />
            </Grid>
            <Grid Grid.Row="1" Margin="10,20">
                <Image Source="{Binding ImageURI}" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" />
            </Grid>
            <Grid Grid.Row="2" Background="#EEEEEE">
                <Button Content="OK" Command="{Binding CloseCommand}" Width="80" Height="25" />
            </Grid>
        </Grid>
    </Grid>

还有VM

public class PopupVM : ViewModelBase
    {

        private bool _isOpen;

        public string ImageURI { get; set; }
        public string Title { get; set; }
        public bool IsOpen { get { return _isOpen; } set { _isOpen = value; RaisePropertyChanged("IsOpen"); } }

        private void ClosePopup()
        {
            IsOpen = false;
        }

        public RelayCommand CloseCommand
        {
            get;
            private set;
        }

        public PopupVM()
        {
            CloseCommand = new RelayCommand(() => ClosePopup());
        }
    }

在页面上使用用户控件

<local:PopupUserControl Visibility="{Binding popupVM_Instance.IsOpen, Converter={StaticResource BoolToVis}}" DataContext="{Binding popupVM_Instance}"/>

另一个带有图像源的用户控件的模型。集合，该集合绑定到ItemsControl

public class DialogMessageModel : ConversationModel
    {
        public ImageAttach Image { get; set; }
        public bool HasImage => Image != null;
        public bool HasMessage => Message != null;

        public RelayCommand OpenImageCommand
        {
            get;
            private set;
        }

        private void OpenImage()
        {
            TestVM.popupVM_Instance.ImageURI = Image.ImageURI;
            TestVM.popupVM_Instance.IsOpen = true;
        }
    }

页面的VM具有PopupVM的实例，其他控件可以获取访问权限来打开它

 public static PopupVM popupVM_Instance { get; set; }

        public TestVM()
        {
            popupVM_Instance = new PopupVM();
        }

打开不起作用。从开始就可见。如果单击按钮，也不要隐藏。我也使用MVVMLight。