Question

我正在尝试在C＃（Windows Universal App）中阅读字段“dc：creator”而无法正常工作。我需要帮助。请

HttpClient httpClient = new HttpClient();
var rssContent = await httpClient.GetStringAsync("http://www.talkingwindows.com.br/feed");
XElement xmlitems = XElement.Parse(rssContent);
List<XElement> elements = xmlitems.Descendants("item").ToList();

foreach (XElement rss in elements)
{
    Lista.Add(
        new Model
        {
          Titulo = rss.Element("title").Value,
          DataPublicacao = rss.Element("pubDate").Value,
          Descricao = rss.Element("description").Value,
          //Autor = rss.Element("dc:creator xmlns:dc=\"http://purl.org/dc/elements/1.1/\"").Value,
          Link = rss.Element("link").Value
        }
     );
}

Answer 1

要选择特定命名空间中的元素，您需要在其前面添加collector.fail(...)。在你的情况下，它应该是这样的：

XNamespace

或者如果您愿意，可以这样做：

XNamespace dcNamespace = "http://purl.org/dc/elements/1.1/";

foreach (XElement rss in elements)
{
    Lista.Add(
        new Model
        {
            Titulo = rss.Element("title").Value,
            DataPublicacao = rss.Element("pubDate").Value,
            Descricao = rss.Element("description").Value,
            Autor = rss.Element(dcNamespace + "creator").Value,
            Link = rss.Element("link").Value
        }
    );
}

可在此处进一步阅读：

https://msdn.microsoft.com/en-us/library/bb387075.aspx

Answer 2

SyndicationItem.ElementExtensions是用于解析RSS和Atom订阅源的API。有sample。

在这种情况下，您可以在enter code here中找到> withCommas Source: local data frame [326 x 1] NA 1 16,244,600 2 8,227,103 3 5,959,718 4 3,428,131 5 2,612,878 6 2,471,784 7 2,252,664 8 2,014,775 9 2,014,670 10 1,841,710 .. ... Classes ‘tbl_df’ and 'data.frame': 326 obs. of 1 variable: $ : Factor w/ 207 levels ""," 1,008 "," 1,129 ",..: 40 178 143 100 66 63 61 58 57 16 ...的扩展元素。

C＃如何从RSS源中读取“dc：creator”元素？

2 个答案: