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：

var table = (Table)docSource.GetChild(NodeType.Table, 0, true);
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：

Document doc=new Document();
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

/// <summary>
/// A manual implementation of the Document.AppendDocument function which shows the general 
/// steps of how a document is appended to another.
/// </summary>
/// <param name="dstDoc">The destination document where to append to.</param>
/// <param name="srcDoc">The source document.</param>
/// <param name="mode">The import mode to use when importing content from another document.</param>
public void AppendDocument(Document dstDoc, Document srcDoc, ImportFormatMode mode)
{
    // Loop through all sections in the source document. 
    // Section nodes are immediate children of the Document node so we can just enumerate the Document.
    foreach (Section srcSection in srcDoc)
    {
        // Because we are copying a section from one document to another, 
        // it is required to import the Section node into the destination document.
        // This adjusts any document-specific references to styles, lists, etc.
        //
        // Importing a node creates a copy of the original node, but the copy
        // is ready to be inserted into the destination document.
        Node dstSection = dstDoc.ImportNode(srcSection, true, mode);

        // Now the new section node can be appended to the destination document.
        dstDoc.AppendChild(dstSection);
    }
}

NodeImporter

public static Document GenerateDocument(Document srcDoc, ArrayList nodes)
        {
            // Create a blank document.
            Document dstDoc = new Document();
            // Remove the first paragraph from the empty document.
            dstDoc.FirstSection.Body.RemoveAllChildren();

            // Import each node from the list into the new document. Keep the original formatting of the node.
            NodeImporter importer = new NodeImporter(srcDoc, dstDoc, ImportFormatMode.KeepSourceFormatting);

            foreach (Node node in nodes)
            {
                Node importNode = importer.ImportNode(node, true);
                dstDoc.FirstSection.Body.AppendChild(importNode);
            }

            // Return the generated document.
            return dstDoc;
        }

参考文档：

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