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我正在开发一个应用程序，该应用程序允许用户上传演示文稿，对其进行编辑，然后将最终输出下载为另一个 PowerPoint 演示文稿。

对于我上传的不同演示文稿，我的行为非常不稳定：

  1. 有时更改后的图像会模糊（不知道为什么？）

  2. 有时会返回不正确的形状 ID，因此我无法将更改的工作与现有的 PowerPoint 形状合并。

    var shape = (PowerPoint.Shape)item;
var shapeid=shape.ID; //this is different from what interop has returned on first presentation read.

  3. 动画没有被正确复制（有时他们这样做，有时他们没有）。

          newshape.AnimationSettings.EntryEffect = oldshape.AnimationSettings.EntryEffect;
      newshape.AnimationSettings.AdvanceMode=oldshape.AnimationSettings.AdvanceMode;        
      newshape.AnimationSettings.AdvanceTime=oldshape.AnimationSettings.AdvanceTime;
      newshape.AnimationSettings.AfterEffect=oldshape.AnimationSettings.AfterEffect;
      newshape.AnimationSettings.Animate=oldshape.AnimationSettings.Animate;
      newshape.AnimationSettings.AnimateBackground = oldshape.AnimationSettings.AnimateBackground;
      newshape.AnimationSettings.TextLevelEffect = PowerPoint.PpTextLevelEffect.ppAnimateByAllLevels;
      newshape.AnimationSettings.AnimateTextInReverse=oldshape.AnimationSettings.AnimateTextInReverse;

我知道服务器端自动化可能有不稳定的行为或死锁。但是，没有任何文件能准确记录该行为的不稳定之处。
这些行为（以上两种）是否属于同一类别，还是我在这里遗漏了什么？我该如何解决这些问题？

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1 回答 1

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如果您仍需要使用 Interop，请尝试释放 COM 对象并偶尔杀死 PowerPoint 实例，如下所述：

public static class PowerPointInterOp
{
    static PowerPoint.Application powerPointApp = null;
    static Object oMissing = System.Reflection.Missing.Value;
    static Object oTrue = true;
    static Object oFalse = false;
    static Object oCopies = 1;

    public static void InitializeInstance()
    {
        if (powerPointApp == null)
        {
            powerPointApp = new PowerPoint.ApplicationClass();

        }           
    }

    public static void KillInstances()
    {
        try
        {
            Process[] processes = Process.GetProcessesByName("POWERPNT");
            foreach(Process process in processes)
            {
                process.Kill();
            }
        }
        catch(Exception)
        {

        }
    }

    public static void CloseInstance()
    {
        if (powerPointApp != null)
        {
            powerPointApp.Quit();
            System.Runtime.InteropServices.Marshal.ReleaseComObject(powerPointApp);
            powerPointApp = null;
        }
    }

    public static PowerPoint.Presentation OpenDocument(string documentPath)
    {
        InitializeInstance();

        PowerPoint.Presentation powerPointDoc = powerPointApp.Presentations.Open(documentPath, MsoTriState.msoTrue, MsoTriState.msoTrue, MsoTriState.msoFalse);

        return powerPointDoc;
    }

    public static void CloseDocument(PowerPoint.Presentation powerPointDoc)
    {
        if (powerPointDoc != null)
        {
            powerPointDoc.Close();
            System.Runtime.InteropServices.Marshal.ReleaseComObject(powerPointDoc);
            powerPointDoc = null;
        }           
    }


}
于 2017-12-05T16:42:42.587 回答