Inserting one document to another Microsoft.Office.Interop.Word

Question

I am dealing with Word VSTO add-in. I wrote a code that inserts one document to another. I have two different approaches.

1) Copy/Paste

var app = new Word.Application();
            var MyDoc = app.Documents.Add(@"C:\install\CSharp\Plank.dotm");
            MyDoc.ActiveWindow.Selection.WholeStory();
            MyDoc.ActiveWindow.Selection.CopyFormat();
            Word.Document doc = Globals.ThisAddIn.Application.ActiveDocument;
            doc.Activate();
            doc.ActiveWindow.Selection.PasteFormat();

2) InsertFile()

var app = new Word.Application();

            var MyDoc = app.Documents.Add(@"C:\install\CSharp\Plank.dotm");
            Word.Document doc = Globals.ThisAddIn.Application.ActiveDocument;
            doc.Activate();
                       //Taking margins
            float TopMargin = MyDoc.PageSetup.TopMargin;
            float RightMargin = MyDoc.PageSetup.RightMargin;
            float LeftMargin = MyDoc.PageSetup.LeftMargin;
            Globals.ThisAddIn.Application.Selection.InsertFile(@"C:\\install\CSharp\Plank.dotm", Link: false, Attachment: false);

At the first approach the line PasteFormat() is not working, telling me that text properties were not copied. (If I use just Copy() and Paste() it works.) Even if I paste manually I get what I want.

The second approach works, but it doesn't take text formatting. So I get the text in some other format and size which differs from the original.

QUESTION is: How can I preserve original font formats? I tried to insert a file in Word manually. And I can't get the original text formatting there either. Maybe it is a wrong approach?

Answer 1

I figured it out with the Copy() / Paste() solution. I need to copy like this:

MyDoc.ActiveWindow.Selection.Copy();
doc.ActiveWindow.Selection.PasteAndFormat(Word.WdRecoveryType.wdFormatOriginalFormatting);

Then it preserves the styles. But sometimes, if the document has tables, it copies them to the next page, which is strange. The InsertFile() method is not working for me.