c# - 如何访问此 XML 字段？

Question

我想yt:username从此XML中提取字段：

var xDoc = XDocument.Load(requestedURL);
var m_oListaMeteo = xDoc.Descendants(ns + "entry").Select(n =>
{
    return new
    {
        username = n.Element(ns + "yt:username").Value
    };
});

但XDocument它本身说The ':' character, hexadecimal value 0x3A, cannot be included in a name.

需要字符串替换吗？还是需要我管理 youtube 的命名空间？

Answer 1

yt is namespace, Try this:

var xDoc = XDocument.Load(@"https://gdata.youtube.com/feeds/api/users/djfonplaz/subscriptions?v=2");
var ns = XNamespace.Get("http://www.w3.org/2005/Atom");
var yt = XNamespace.Get("http://gdata.youtube.com/schemas/2007");
var m_oListaMeteo = xDoc.Descendants(ns + "entry").Select(n =>
{
    return new
    {
        username = n.Element(yt + "username").Value
    };
});

Answer 2

Make sure you are using the proper namespaces:

var xDoc = XDocument.Load(requestedURL);
var m_oListaMeteo = xDoc
    .Root
    .Elements("{http://www.w3.org/2005/Atom}entry")
    .Select(entry => new
    {
        username = entry.Element("{http://gdata.youtube.com/schemas/2007}username").Value
    });