[英]How to create a SyndicationFeed with a custom namespace
How can I generate Atom Feed which will contain the namespaces displayed in the image below? 如何生成包含下图中显示的命名空间的Atom Feed? All the nodes of the Atom feed have to start with "a:". Atom提要的所有节点都必须以“a:”开头。
Here is what I am doing right now, however it doesn't work. 这是我现在正在做的事情,但它不起作用。
SyndicationFeed feed = new SyndicationFeed();
XmlQualifiedName key = new XmlQualifiedName("os", "xmlns");
feed.AttributeExtensions.Add(key, "http://a9.com/-/spec/opensearch/1.1/");
Thanks! 谢谢!
I believe it should be 我相信它应该是
SyndicationFeed feed = new SyndicationFeed();
XmlQualifiedName key = new XmlQualifiedName("os", "http://www.w3.org/2000/xmlns/");
feed.AttributeExtensions.Add(key, "http://a9.com/-/spec/opensearch/1.1/");
UPDATE: 更新:
After reading your question more carefully, I believe you could accomplish this by overriding the WriteStartElement and WriteStartAttribute methods of the XmlWriter instance used by the Atom10FeedFormatter . 在更仔细地阅读您的问题之后,我相信您可以通过覆盖Atom10FeedFormatter使用的XmlWriter实例的WriteStartElement和WriteStartAttribute方法来实现此目的 。 You can do this by implementing a custom XmlWriter class like the example below. 您可以通过实现自定义XmlWriter类来完成此操作,如下例所示。
class AtomXmlTextWriter : XmlTextWriter
{
private const string Atom10XmlNs = "http://www.w3.org/2005/Atom";
private const string Atom10XmlNsPrefix = "a";
public AtomXmlTextWriter(String filename, Encoding encoding)
: base(filename, encoding)
{
}
public override void WriteStartElement(string prefix, string localName, string ns)
{
base.WriteStartElement(GetAtomPrefix(ns), localName, ns);
}
public override void WriteStartAttribute(string prefix, string localName, string ns)
{
base.WriteStartAttribute(GetAtomPrefix(ns), localName, ns);
}
internal string GetAtomPrefix(string ns)
{
string prefix = string.Empty;
if ((ns != null) && (ns.Equals(Atom10XmlNs)))
prefix = Atom10XmlNsPrefix;
return prefix;
}
}
Using your custom class with the Atom10FeedFormatter 将自定义类与Atom10FeedFormatter一起使用
SyndicationFeed feed = new SyndicationFeed();
feed.AttributeExtensions.Add(new XmlQualifiedName("os", "http://www.w3.org/2000/xmlns/"),
"http://a9.com/-/spec/opensearch/1.1/");
feed.AttributeExtensions.Add(new XmlQualifiedName(null, "http://www.w3.org/2000/xmlns/"),
http://schemas.zune.net/catalog/apps/2008/02");
using (XmlWriter writer = new AtomXmlTextWriter(@"TestFeed.xml", Encoding.UTF8))
{
Atom10FeedFormatter feedFormatter = new Atom10FeedFormatter(feed);
feedFormatter.WriteTo(writer);
}
produces the desired output 产生所需的输出
<a:feed xmlns:os="http://a9.com/-/spec/opensearch/1.1/"
xmlns="http://schemas.zune.net/catalog/apps/2008/02"
xmlns:a="http://www.w3.org/2005/Atom">
<a:title type="text" />
<a:id>uuid:0f1b2c84-c935-459e-bc89-79d06b5a976b;id=1</a:id>
<a:updated>2011-05-21T17:07:46Z</a:updated>
</a:feed>
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