無法插入OpenXmlElement「newChild」，因爲它是樹的一部分

Question

標題指出我收到的錯誤。我正在嘗試隱藏使用OpenXml的單詞doc中的所有文本。目前，當我嘗試並追加段落屬性時，我收到上述錯誤。我在網上找不到這個錯誤。返回錯誤

 using (WordprocessingDocument wdDoc = WordprocessingDocument.Open(mDoc_copy, true)) 
     { 
      // Manage namespaces to perform XPath queries. 
      NameTable nt = new NameTable(); 
      XmlNamespaceManager nsManager = new XmlNamespaceManager(nt); 
      nsManager.AddNamespace("w", wordmlNamespace); 

      // Get the document part from the package. 
      // Load the XML in the document part into an XmlDocument instance. 
      XmlDocument xdoc = new XmlDocument(nt); 
      xdoc.Load(wdDoc.MainDocumentPart.GetStream()); 

      MainDocumentPart main = wdDoc.MainDocumentPart; 

      IEnumerable<OpenXmlElement> elem = main.Document.Body.Descendants().ToList(); 
      Paragraph p; 
      ParagraphProperties pp = new ParagraphProperties(); 
      ParagraphMarkRunProperties prmp = new ParagraphMarkRunProperties(); 
      Vanish v = new Vanish(); 
      apprmp.AppendChild<Vanish>(v); 
      pp.AppendChild<ParagraphMarkRunProperties>(apprmp); 


      foreach (Paragraph para in main.Document.Body.Descendants<Paragraph>().ToList()) 
      { 


        para.ParagraphProperties = pp; 

      } 
     } 

Answer 1

代碼通常這錯誤可以通過克隆任何節點引起該異常，然後插入該克隆值是固定的。事情是這樣的：

LeftBorder leftBorder = new LeftBorder() { Style = BorderStyleValues.Thin }; 
TopBorder topBorder = new TopBorder() { Style = BorderStyleValues.Thin }; 
RightBorder rightBorder = new RightBorder() { Style = BorderStyleValues.Thin }; 
BottomBorder bottomBorder = new BottomBorder() { Style = BorderStyleValues.Thin }; 

Color color = new Color() { Auto = true, Rgb = rgbHexValue == string.Empty ? new HexBinaryValue("00000000") : new HexBinaryValue(rgbHexValue) }; 

leftBorder.Color = color; 
topBorder.Color = (Color)color.CloneNode(true); 
rightBorder.Color = (Color)color.CloneNode(true); 
bottomBorder.Color = (Color)color.CloneNode(true); 

這將創建一個Color實例，然後通過克隆原來的實例，然後將其插入使用相同的實例的所有邊界。