C＃互操作单词，剪切和过去在Office 2016上有效，但不适用于Office 2019

我发现了类似的问题，但并不完全相同。

我有一个字模板，可以用用户输入的文字填充。

在用户界面上，有一个文本字段和两个签名字段（一个生成图像文件的第三方组件）。

如果文本不是很长，则会传递单词的两个版本。但是，如果文本很长并且有很多输入内容，那么它将无法在Office 2019和Office 365上运行。在Office 2016上，它将始终运行。

为了更好地解释，

我打开文件：

        Microsoft.Office.Interop.Word.Application app = null;
        Microsoft.Office.Interop.Word.Document doc = null;

        ...

        app = new Microsoft.Office.Interop.Word.Application();
        doc = app.Documents.Open(tempPath);
        app.Visible = false;

        doc.Bookmarks["comment"].Select();
        app.Selection.TypeText(orderComment); //Order comment is typed by the user

        ...

        //this code saves the signature as a png image and it works in any case. The image exists in the folder before calling the rest of the code.
        string clientSignaturePath = System.Configuration.ConfigurationManager.AppSettings["TempPath"] + Guid.NewGuid().ToString().Substring(0, 6) + ".png";
        using (FileStream fs = new FileStream(clientSignaturePath, FileMode.Create))
         {
           using (BinaryWriter bw = new BinaryWriter(fs))
           {
             byte[] data = Convert.FromBase64String(model.ClientSignature);
             bw.Write(data);
             bw.Close();
           }
             fs.Close();
          }




          //If the orderComment is too long, it gives this error in this method when I call the line rng.Paste(); on Office 2019 and 365 but not on 2016.
          error : this method or property is not available because the clipboard is empty or invalid
          
          UserMethods.InsertImage(doc, clientSignaturePath, "client", 79, 175);

在类UserMethods中：

  public static void InsertImage(Microsoft.Office.Interop.Word.Document doc, string imagePath, string type, float? imageHeight = null, float? imageWidth = null)
    {
        Range rng = null;
        if (type == "tech")
            rng = doc.Tables[7].Cell(1, 1).Range;
        else if (type == "client")
            rng = doc.Tables[7].Cell(1, 2).Range;
        else
            rng = doc.Tables[7].Cell(1, 3).Range;


        Microsoft.Office.Interop.Word.InlineShape autoScaledInlineShape = rng.InlineShapes.AddPicture(imagePath);
        float scaledWidth = imageWidth ?? autoScaledInlineShape.Width;
        float scaledHeight = imageHeight ?? autoScaledInlineShape.Height;
        autoScaledInlineShape.Delete();

        // Create a new Shape and fill it with the picture
        Microsoft.Office.Interop.Word.Shape newShape = doc.Shapes.AddShape(1, 0, 0, scaledWidth, scaledHeight);
        newShape.Fill.UserPicture(imagePath);

        // Convert the Shape to an InlineShape and optional disable Border
        Microsoft.Office.Interop.Word.InlineShape finalInlineShape = newShape.ConvertToInlineShape();
        //finalInlineShape.Line.Visible = Microsoft.Office.Core.MsoTriState.msoFalse;

        // Cut the range of the InlineShape to clipboard
        finalInlineShape.Range.Cut();

        // And paste it to the target Range
        rng.Paste();

    }

我的Office版本无论如何都可以使用：

服务器的（Windows Server 2016）正式版本在大文本情况下不起作用：

提前致谢。