具体（深吸一口气）：你会如何去在C＃/找到所有的XML命名空间NET 的XmlDocument 对其中有中没有适用的模式实例的的XmlSchemaSet （架构属性）？

Specifically (taking a deep breath): How would you go about finding all the XML name spaces within a C#/.NET XmlDocument for which there are no applicable schemas in the instance's XmlSchemaSet (Schemas property)?

我的XPath神奇的是缺乏成熟到做这样的事情，但是我将继续寻找在此期间...

My XPath magic is lacking the sophistication to do something like this, but I will keep looking in the meantime ...

推荐答案

您需要把所有的不同的命名空间的文档中的列表，然后比较，与不同的命名空间的架构设置。

You need to get a list of all the distinct namespaces in the document, and then compare that with the distinct namespaces in the schema set.

但空间声明的名称通常不中的XPath文档模型曝光。但考虑到一个节点，你可以得到它的命名空间：

But namespace declaration names are typically not exposed in the XPath document model. But given a node you can get its namespace:

// Match every element and attribute in the document
var allNodes = xmlDoc.SelectNodes("//(*|@*)");
var found = new Dictionary<String, bool>(); // Want a Set<string> really
foreach (XmlNode n in allNodes) {
  found[n.NamespaceURI] = true;
}
var allNamespaces = found.Keys.OrderBy(s => s);