Aspose.Words：如何添加另一个WORD文档中的Node对象

原文:Aspose.Words：如何添加另一个WORD文档中的Node对象

首先看一段代码，这段代码意图从docSource中获取第一个表格，并插入docTarget的末尾：

1 var table = (Table)docSource.GetChild(NodeType.Table, 0, true);
2 docTarget.FirstSection.Body.ChildNodes.Add(table);

这段代码会抛出异常：“The newChild was created from a different document than the one that created this node.”，这是什么原因呢？

原因是，对于Aspose.Words的Node对象，它的一系列样式和格式的控制，取决于它所在的DocumentBase父对象，这也是很多Aspose.Words对象声明时，必须指定它的DocumentBase参数，比如声明一个Table，应该如下：

1 Document doc=new Document();
2 Table table=new Table(doc);

那么，我们有没有办法添加另一个文档中的对象呢？有，必须通过Document.ImportNode方法或者使用NodeImporter对象。

这两种方法思路都是将源文档中的Node导入到目标文档中，再追加Node到合适的位置。

Document.ImportNode

 1 /// <summary>
 2 /// A manual implementation of the Document.AppendDocument function which shows the general
 3 /// steps of how a document is appended to another.
 4 /// </summary>
 5 /// <param name="dstDoc">The destination document where to append to.</param>
 6 /// <param name="srcDoc">The source document.</param>
 7 /// <param name="mode">The import mode to use when importing content from another document.</param>
 8 public void AppendDocument(Document dstDoc, Document srcDoc, ImportFormatMode mode)
 9 {
10     // Loop through all sections in the source document.
11     // Section nodes are immediate children of the Document node so we can just enumerate the Document.
12     foreach (Section srcSection in srcDoc)
13     {
14         // Because we are copying a section from one document to another,
15         // it is required to import the Section node into the destination document.
16         // This adjusts any document-specific references to styles, lists, etc.
17         //
18         // Importing a node creates a copy of the original node, but the copy
19         // is ready to be inserted into the destination document.
20         Node dstSection = dstDoc.ImportNode(srcSection, true, mode);
21
22         // Now the new section node can be appended to the destination document.
23         dstDoc.AppendChild(dstSection);
24     }
25 }

NodeImporter

 1 public static Document GenerateDocument(Document srcDoc, ArrayList nodes)
 2         {
 3             // Create a blank document.
 4             Document dstDoc = new Document();
 5             // Remove the first paragraph from the empty document.
 6             dstDoc.FirstSection.Body.RemoveAllChildren();
 7
 8             // Import each node from the list into the new document. Keep the original formatting of the node.
 9             NodeImporter importer = new NodeImporter(srcDoc, dstDoc, ImportFormatMode.KeepSourceFormatting);
10
11             foreach (Node node in nodes)
12             {
13                 Node importNode = importer.ImportNode(node, true);
14                 dstDoc.FirstSection.Body.AppendChild(importNode);
15             }
16
17             // Return the generated document.
18             return dstDoc;
19         }

参考文档：

http://www.aspose.com/docs/display/wordsnet/Aspose.Words.DocumentBase.ImportNode+Overload_1