在转换中间，需要把template中的Mail Merge Field去掉。Mail Merge Field的字符格式是：'MERGEFIELD MyFieldName \\* MERGEFORMAT'，而对应的XML Node为：
1: <w:fldSimple w:instr="MERGEFIELD FIELD_SYSTEM_DATE \m \* MERGEFORMAT">
2: <w:r>
3: <w:rPr>
4: <w:noProof />
5: </w:rPr>
6: <w:t>«FIELD_SYSTEM_DATE»</w:t>
7: </w:r>
8: </w:fldSimple>
我们要想办法把这个Node去掉，并且用
1: <w:r>
2: <w:t>System Date</w:t>
3: </w:r>
来代替。
因为在之前的文章，我们可以知道dotx中的document.xml已经得到并且处理为一个XmlDocument Object了。我们可以通过这个XmlDocument来处理相关的节点。
当然是先设置一个XmlNamespaceManager:
1: const string wordmlNamespace = "http://schemas.openxmlformats.org/wordprocessingml/2006/main";
2:
3: // Manage namespaces to perform Xml XPath queries.
4: NameTable nt = new NameTable();
5: XmlNamespaceManager nsManager = new XmlNamespaceManager(nt);
6: nsManager.AddNamespace("w", wordmlNamespace);
然后，将之前的XmlDocument Object处理一下：
1: // parse the document.xml
2: XmlDocument xdoc = new XmlDocument(nt);
3: xdoc.Load(documentPart.GetStream());
接着就该把Mail Merge Field分离了：
1: int iTotalFields = 0;
2:
3: XmlNodeList nodeList = xdoc.SelectNodes("//w:fldSimple", nsManager);
4: foreach (XmlNode node in nodeList)
5: {
6: // Create text node
7: XmlNode newNode = xdoc.CreateNode(XmlNodeType.Element, "w", "r", nsManager.LookupNamespace("w"));
8: XmlNode newChildNode = xdoc.CreateNode(XmlNodeType.Element, "w", "t", nsManager.LookupNamespace("w"));
9:
10: String fieldText = node.Attributes[0].Value;
11:
12: // only getting the mailmerge fields
13: if (fieldText.StartsWith(" MERGEFIELD"))
14: {
15: // The text comes in the format of 'MERGEFIELD MyFieldName \\* MERGEFORMAT'
16: // This has to be edited to get only the fieldname "myfieldname"
17: Int32 endMerge = fieldText.IndexOf("\\");
18: Int32 fieldNameLength = fieldText.Length - endMerge;
19: String fieldName = fieldText.Substring(11, endMerge - 11);
20:
21: // Gives the fieldnames as the user had entered in .dot file
22: fieldName = fieldName.Trim();
23:
24: // **** FIELD REPLACEMENT IMPLEMENTATION GOES HERE ****//
25: switch (fieldName)
26: {
27: case "FIELD_SYSTEM_DATE":
28: newChildNode.InnerText = DateTime.Now.ToString("dd/MM/yyyy");
29: break;
30: }
31: }
32: newNode.AppendChild(newChildNode);
33:
34: node.ParentNode.ReplaceChild(newNode, node);
35:
36: iTotalFields++;
37: }
这样就处理好了有Mail merge field的Word template文档了。
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