如何创建在.NET中使用的XmlWriter一个XmlDocument的？ [英] How to create a XmlDocument using XmlWriter in .NET?

问题描述

许多.NET函数使用的XmlWriter输出/生成XML。输出到文件/字符串/内存是一个非常操作：

Many .NET functions use XmlWriter to output/generate xml. Outputting to a file/string/memory is a very operation:

XmlWriter xw = XmlWriter.Create(PutYourStreamFileWriterEtcHere);
xw.WriteStartElement("root");
...

有时候，你需要操作生成的XML，因此希望将其加载到一个XmlDocument的或可能需要一个XmlDocument某些其他原因，但你必须使用的XmlWriter生成XML。例如，如果你在输出到XmlWriter的第三方库调用函数而已。

Sometimes , you need to manipulate the resulting Xml and would therefore like to load it into a XmlDocument or might need an XmlDocument for some other reason but you must generate the XML using an XmlWriter. For example, if you call a function in a 3rd party library that outputs to a XmlWriter only.

的事情之一，你可以做的是编写的XML字符串，然后将其加载到你的XmlDocument：

One of the things you can do is write the xml to a string and then load it into your XmlDocument:

StringWriter S = new StringWriter();
XmlWriter xw = XmlWriter.Create(S);
/* write away */
XmlDocument xdoc = new XmlDocument();
xdoc.LoadXml(S.ToString());

然而，这是低效的 - 首先你序列化所有的XML信息转换成字符串，然后你再解析字符串创建DOM

However this is inefficient - first you serialize all the xml info into a string, then you parse the string again to create the DOM.

你怎么可以指向一个的XmlWriter建立一个XmlDocument的直接？

How can you point an XmlWriter to build a XmlDocument directly?

推荐答案

下面是至少有一个解决方案：

Here's at least one solution:

XmlDocument doc = new XmlDocument(); 
using (XmlWriter writer = doc.CreateNavigator().AppendChild()) 
{ 
    // Do this directly 
     writer.WriteStartDocument(); 
     writer.WriteStartElement("root"); 
     writer.WriteElementString("foo", "bar"); 
     writer.WriteEndElement(); 
     writer.WriteEndDocument();
    // or anything else you want to with writer, like calling functions etc.
}

显然声明XpathNavigator给你，当你调用一个XmlWriter的使​​用appendChild（）

Apparently XpathNavigator gives you a XmlWriter when you call AppendChild()

现金去马丁Honnen上：<一href="http://groups.google.com/group/microsoft.public.dotnet.xml/browse%5Fthread/thread/24e4c8d249ad8299?pli=1">http://groups.google.com/group/microsoft.public.dotnet.xml/browse%5Fthread/thread/24e4c8d249ad8299?pli=1

Credits go to Martin Honnen on : http://groups.google.com/group/microsoft.public.dotnet.xml/browse%5Fthread/thread/24e4c8d249ad8299?pli=1

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