Parsing web.config with XmlDocument.SelectSingleNode

最新推荐文章于 2023-06-19 15:28:14 发布

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最新推荐文章于 2023-06-19 15:28:14 发布

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本文讨论了在使用ASP.NET时遇到的配置文件中XML命名空间导致SelectSingleNode无法正常工作的问题，并提供了使用XmlNamespaceManager的解决方案。

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问题现象：

I have an utility that modified ASP.NET web.config using code like this:

XmlDocument document = new XmlDocument();
document.Load(sConfigFileName);
XmlNode nodeParent = document.SelectSingleNode("/configuration/system.web");

I found that this code doesn't work with VS 2005 (SelectSingleNode returns null) because configuration element has xmlns

<configuration xmlns="http://schemas.microsoft.com/.NetConfiguration/v2.0"> .

I was able to delete xmlns attribute without any visible side effects to make SelectSingleNode("/configuration/system.web") working .

But it will be probably required to use new classes in Configuration namespace or use XmlNamespaceManager.

解决方案：

XmlDocument document = new XmlDocument();
document.Load(sConfigFileName);
XmlNamespaceManager ns = new XmlNamespaceManager(document.NameTable);

ns.AddNamespace("x", "http://schemas.microsoft.com/.NetConfiguration/v2.0");

XmlNode myNode = document.SelectSingleNode("/x:configuration/x:system.web",ns);

试过可行

原文地址：http://geekswithblogs.net/mnf/archive/2006/02/02/67909.aspx