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如何将另一个命名空间添加到WCF联合源?

feeds namespaces wcf

Pablo Fernandez · 技术社区 · 15 年前

在我的提要生成代码中,我有如下内容:

XNamespace itunesNS = "http://www.itunes.com/dtds/podcast-1.0.dtd";
feed.ElementExtensions.Add(
    new XElement(itunesNS + "subtitle", 
        new XAttribute(XNamespace.Xmlns + "itunes", itunesNS.NamespaceName),
        "sample subtitle").CreateReader());

它会产生类似这样的结果:

<itunes:subtitle xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd">sample subtitle</itunes:subtitle>

如何在channel元素中获取iTunes命名空间的声明(xmlns:itunes=“http://www.itunes.com/dtds/podcast-1.0.dtd”),以便不必在每个itunes元素上重复声明?

我的源是使用System.ServiceModel.Syndication.SyndicationFeed创建的。

2 回复 | 直到 15 年前

Pablo Fernandez 15 年前

我正确支持iTunes的最终解决方案是:

public class ItunesFeed : SyndicationFeed {
    private string @namespace = "http://www.itunes.com/dtds/podcast-1.0.dtd";
    private string prefix = "itunes";

    public string Subtitle {get; set;}
    public string Author { get; set; }
    public string Summary { get; set; }
    public string OwnerName { get; set; }
    public string OwnerEmail { get; set; }
    public bool Explicit { get; set; }
    public List<List<string>> ItunesCategories = new List<List<string>>();

    protected override void WriteAttributeExtensions(XmlWriter writer, string version) {
        writer.WriteAttributeString("xmlns", prefix, null, @namespace);
    }

    protected override void WriteElementExtensions(XmlWriter writer, string version) {
        WriteItunesElement(writer, "subtitle", Subtitle);
        WriteItunesElement(writer, "author", Author);
        WriteItunesElement(writer, "summary", Summary);
        if (ImageUrl != null) {
            WriteItunesElement(writer, "image", ImageUrl.ToString());
        }
        WriteItunesElement(writer, "explicit", Explicit ? "yes" : "no");

        writer.WriteStartElement(prefix, "owner", @namespace);
        WriteItunesElement(writer, "name", OwnerName);
        WriteItunesElement(writer, "email", OwnerEmail);
        writer.WriteEndElement();

        foreach (var category in ItunesCategories) {
            writer.WriteStartElement(prefix, "category", @namespace);
            writer.WriteAttributeString("text", category[0]);
            if (category.Count == 2) {
                writer.WriteStartElement(prefix, "category", @namespace);
                writer.WriteAttributeString("text", category[1]);
                writer.WriteEndElement();
            }
            writer.WriteEndElement();
        }
    }

    private void WriteItunesElement(XmlWriter writer, string name, string value) {
        if (value != null) {
            writer.WriteStartElement(prefix, name, @namespace);
            writer.WriteValue(value);
            writer.WriteEndElement();
        }
    }
}


public class ItunesItem : SyndicationItem {
    private string @namespace = "http://www.itunes.com/dtds/podcast-1.0.dtd";
    private string prefix = "itunes";

    public string Subtitle { get; set; }
    public string Author { get; set; }
    public string Duration { get; set; }
    public string Keywords { get; set; }
    public bool Explicit { get; set; }

    protected override void WriteElementExtensions(XmlWriter writer, string version) {
        WriteItunesElement(writer, "subtitle", Subtitle);
        WriteItunesElement(writer, "author", Author);
        WriteItunesElement(writer, "summary", Summary.Text);
        WriteItunesElement(writer, "duration", Duration);
        WriteItunesElement(writer, "keywords", Keywords);
        WriteItunesElement(writer, "explicit", Explicit ? "yes" : "no");
    }

    private void WriteItunesElement(XmlWriter writer, string name, string value) {
        if (value != null) {
            writer.WriteStartElement(prefix, name, @namespace);
            writer.WriteValue(value);
            writer.WriteEndElement();
        }
    }
}

Kirk Liemohn 15 年前

这可能有帮助。我也在试着做同样的事情,但还没看到整个画面…

http://hyperthink.net/blog/declaring-xml-namespaces-on-a-syndicationfeed/