如何綁定到WPF ProgressBar的Visibility元素？

Question

如何綁定到WPF的ProgressBar Visibility元素？我無法將它綁定到字符串屬性，因爲它需要一個帶有三個選項的枚舉：Collapsed，Visible和Hidden。 請爲ProgressBar的綁定可見性顯示可理解的代碼。提前致謝。

Answer 1

<Grid Width="150" Margin="30,0" Visibility="{Binding ProgressBarVisibility}"> 
    <ProgressBar Width="150" Height="Auto" HorizontalAlignment="Stretch" Foreground="#FF01D328" 
       Minimum="-3" Maximum="100" Value="{Binding DownloadPercentage, Mode=OneWay}" /> 
    <TextBlock Text="Downloading" HorizontalAlignment="Center" /> 
</Grid> 

並在視圖模型：

public Visibility ProgressBarVisibility 
{ 
    get 
    { 
     return (DownloadingPdf && DownloadPercentage < 100) ? Visibility.Visible : Visibility.Collapsed; 
    } 
} 

private int mDownloadPercentage; 
public int DownloadPercentage 
{ 
    get { return mDownloadPercentage; } 
    set 
    { 
     if (mDownloadPercentage==value) 
     { 
      return; 
     } 
     else 
     { 
      mDownloadPercentage = Math.Min(Math.Abs(value), 100); 
      OnPropertyChanged("DownloadPercentage"); 
      OnPropertyChanged("DownloadProgressBarVisibility"); 
     } 
    } 
}