使用包修改Word文檔XML

Question

我試圖修改一個簡單的MS字模板XML。 我意識到有SDK可用，這可以使這個過程更容易，但我負責維護使用包，我被告知做同樣的事情。

我有一個基本的測試文檔，其中兩個占位符映射到以下XML：

<root>
  <element>
     Fubar
  </element>
  <second>
     This is the second placeholder
  </second>
</root>

我正在做的是使用單詞doc創建流，刪除現有的XML，獲取一些硬編碼的測試XML並嘗試將其寫入流。

這是我正在使用的代碼：

string strRelRoot = "http://schemas.openxmlformats.org/officeDocument/2006/relationships/officeDocument";
byte[] buffer = File.ReadAllBytes("dev.docx");
//stream with the template
MemoryStream stream = new MemoryStream(buffer, true);
//create a package using the stream
Package package = Package.Open(stream, FileMode.Open, FileAccess.ReadWrite);
PackageRelationshipCollection pkgrcOfficeDocument = package.GetRelationshipsByType(strRelRoot);
foreach (PackageRelationship pkgr in pkgrcOfficeDocument)
{
    if (pkgr.SourceUri.OriginalString == "/")
    {
        Uri uriData = new Uri("/customXML/item1.xml", UriKind.Relative);
        //remove the existing part
        if (package.PartExists(uriData))
        { 
            // Delete template "/customXML/item1.xml" part
            package.DeletePart(uriData);
        }
        //create a new part
        PackagePart pkgprtData = package.CreatePart(uriData, "application/xml");
        //test data
        string xml = @"<root>
                        <element>
                            Changed
                        </element>
                        <second>
                                The second placeholder changed
                        </second>
                    </root>";
        //stream created from the xml string
        MemoryStream fromStream = new MemoryStream();
        UnicodeEncoding uniEncoding = new UnicodeEncoding();
        byte[] fromBuffer = uniEncoding.GetBytes(xml);
        fromStream.Write(fromBuffer, 0, fromBuffer.Length);
        fromStream.Seek(0L, SeekOrigin.Begin);
        Stream toStream = pkgprtData.GetStream();
        //copy the xml to the part stream
        fromStream.CopyTo(toStream);
        //copy part stream to the byte stream
        toStream.CopyTo(stream);

    }
}

這是目前沒有修改文檔，雖然我覺得我接近解決方案。 任何建議將非常感謝。 謝謝！

編輯：為了cla，我得到的結果是文件沒有變化。 我沒有例外或類似，但文檔XML沒有被修改。

Answer 1

好的，所以不是我承諾的及時回復，但是這里去了！

這個問題有幾個方面。 示例代碼來自內存和文檔，不一定要編譯和測試。

---

閱讀模板XML

在刪除包含模板XML的包部件之前，需要打開其流並讀取XML。 如果部件不存在，那么如何獲取XML取決於您。

我的示例代碼使用LINQ to XML API中的類，盡管您可以使用您喜歡的任何一組XML API。

XElement templateXml = null;
using (Stream stream = package.GetPart(uriData))
    templateXml = XElement.Load(stream);
// Now you can delete the part.

此時，您在templateXml中具有模板XML的內存表示形式。

---

將值替換為占位符

templateXml.SetElementValue("element", "Replacement value of first placeholder");
templateXml.SetElementValue("second", "Replacement value of second placeholder");

如果您需要執行比此更高級的任何操作，請查看XElement上的方法，例如，閱讀原始內容以確定替換值。

---

保存文檔

這是您的原始代碼，經過修改和注釋。

// The very first thing to do is create the Package in a using statement.
// This makes sure it's saved and closed when you're done.
using (Package package = Package.Open(...))
{
    // XML reading, substituting etc. goes here.

    // Eventually...
    //create a new part
    PackagePart pkgprtData = package.CreatePart(uriData, "application/xml");
    // Don't need the test data anymore.
    // Assuming you need UnicodeEncoding, set it up like this.
    var writerSettings = new XmlWriterSettings
    {
        Encoding = Encoding.Unicode,
    };
    // Shouldn't need a MemoryStream at all; write straight to the part stream.
    // Note using statements to ensure streams are flushed and closed.
    using (Stream toStream = pkgprtData.GetStream())
    using (XmlWriter writer = XmlWriter.Create(toStream, writerSettings))
        templateXml.Save(writer);
    // No other copying should be necessary.
    // In particular, your toStream.CopyTo(stream) appeared
    // to be appending the part's data to the package's stream
    // (the physical file), which is a bug.
} // This closes the using statement for the package, which saves the file.