c# - 绑定(bind)进度条可见性 mvvm 不起作用

Question

对不起我的英语不好:x

我在我的项目中使用 MVVM Light 工具包，我尝试折叠并恢复进度条，但我使用了很多片段并浏览了很多围绕这个主题的论坛，我无法解决我的问题。

我的家.xaml

<ProgressBar Minimum="0" Maximum="100" Height="16" IsIndeterminate="True" Visibility="{Binding ProgressBarVisibility}"/>

我的 HomeViewModel :

    private System.Windows.Visibility progressBarVisibility;

    public System.Windows.Visibility ProgressBarVisibility
    {
        get { return progressBarVisibility; }
        set
        {
            progressBarVisibility = value;
            RaisePropertyChanged("ProgressBarVisibility");
        }
    }

    /// <summary>
    /// Initializes a new instance of the HomeViewModel class.
    /// </summary>
    public HomeViewModel()
    {
        this.ContentStatutBar = "Recherche de mises à jour en cours";
        this.ProgressBarVisibility = Visibility.Visible;
        this.DownButtonVisibility = System.Windows.Visibility.Collapsed;

        this.flag = false;

        this.fakeButtonAction = new RelayCommand(() => this.update());
    }

    public void update()
    {
        if (!this.flag)
        {
            this.flag = true;

            this.ContentStatutBar = "Une mise à jour en attente";
            this.progressBarVisibility = Visibility.Collapsed;
            this.DownButtonVisibility = System.Windows.Visibility.Visible;
        }
        else
        {
            this.flag = false;

            this.ContentStatutBar = "Aucune mises à jour";
            this.progressBarVisibility = Visibility.Visible;
            this.DownButtonVisibility = System.Windows.Visibility.Collapsed;
        }

        this.ContentStatutBar = this.DownButtonVisibility.ToString();
    }

当我在我的 Home.xaml.cs 中使用我的更新方法时，它可以工作(不绑定(bind) -->(progressbar.Visibility = Visibility.Visible))但是当我尝试通过在我的 VM 中绑定(bind)来使用它时它不起作用:[

你能帮我吗 ？

最好的祝福 ;)

Answer 1

您正在更改字段，在更新方法中更新属性

      this.ProgressBarVisibility = Visibility.Visible;