使用单击动画以编程方式推进Powerpoint幻灯片

我想要做的是从我的WPF应用程序控制一个Powerpoint演示文稿 . 使用此问题的代码：C# - way to programmatically advance Powerpoint slide show?它对于普通幻灯片非常有效 .

但是一旦我看到带有鼠标点击触发的动画的幻灯片，它就不会像我期望的那样工作 . 当进入这样的幻灯片时，它将按预期显示，但是当我调用objPres.SlideShowWindow.View.Next（）时，它什么都不做，并且在第二次或第三次单击后，它直接进入下一张幻灯片，没有动画 .

奇怪的是：当我通过Timer调用objPres.SlideShowWindow.View.Next（）时，它可以工作！动画正在按预期运行 .

这是我的代码：

Microsoft.Office.Interop.PowerPoint.Application oPPT;
Microsoft.Office.Interop.PowerPoint.Presentations objPresSet;
Microsoft.Office.Interop.PowerPoint.Presentation objPres;
Microsoft.Office.Interop.PowerPoint.SlideShowView oSlideShowView;
Timer slidetest;

private void OpenPPT(object sender, RoutedEventArgs e)
{
    //Create an instance of PowerPoint.
    oPPT = new Microsoft.Office.Interop.PowerPoint.Application();
    // Show PowerPoint to the user.
    oPPT.Visible = Microsoft.Office.Core.MsoTriState.msoTrue;
    objPresSet = oPPT.Presentations;


    OpenFileDialog Opendlg = new OpenFileDialog();

    Opendlg.Filter = "Powerpoint|*.ppt;*.pptx|All files|*.*";

    // Open file when user  click "Open" button  
    if (Opendlg.ShowDialog() == true)
    {
        string pptFilePath = Opendlg.FileName;
        //open the presentation
        objPres = objPresSet.Open(pptFilePath, MsoTriState.msoFalse,
        MsoTriState.msoTrue, MsoTriState.msoTrue);

        objPres.SlideShowSettings.ShowPresenterView = MsoTriState.msoFalse;
        System.Diagnostics.Debug.WriteLine(objPres.SlideShowSettings.ShowWithAnimation);
        objPres.SlideShowSettings.Run();

        oSlideShowView = objPres.SlideShowWindow.View;


        slidetest = new Timer(4000);
        slidetest.AutoReset = false;
        slidetest.Elapsed += new ElapsedEventHandler(slidetest_Elapsed);
        slidetest.Start();

    }
}

void slidetest_Elapsed(object sender, ElapsedEventArgs e)
{
    // this works as expected
    oSlideShowView.Next();
}

private void OnNextClicked(object sender, RoutedEventArgs e)
{
    // this doesn't work, animations aren't shown at all.
    oSlideShowView.Next();
}

我相信这很容易，我忽视了一些事情 . 但是我在这方面敲了很长时间:(