尝试使用 OpenXml SDK C# 将书签内容从 1 个单词文件复制到另一个单词文件，出现错误

问题描述

public void testingExecute()
    {
        try
        {
            using (WordprocessingDocument wordDoc1 = WordprocessingDocument.Open(fromDocument1,false)) // opening 1st word file
            using (WordprocessingDocument wordDoc2 = WordprocessingDocument.Open(toDocument2,true)) // opening 2nd word file
            {

                BookmarkStart bookmarkStart = new BookmarkStart();
               
                var res = from bm in wordDoc1.MainDocumentPart.RootElement.Descendants<BookmarkStart>()
                          where bm.Name == "TestBookmark"
                          select bm;
                
                var bookmarkstart = res.SingleOrDefault();
                var res1 = from bm in wordDoc1.MainDocumentPart.RootElement.Descendants<BookmarkEnd>()
                           where bm.Id == bookmarkstart.Id
                           select bm;
                var bookmarkend = res1.SingleOrDefault();

                body.InsertBeforeSelf<BookmarkStart>(bookmarkstart);
                body.InsertAfterSelf<BookmarkEnd>(bookmarkend);                    
                wordDoc2.MainDocumentPart.Document.Save();
            }
        }
        catch (Exception Ex)
        {
            throw;
        }
    }

解决方法

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