c# - XDocument says Data at the root level is invalid?

Question

I'm trying to parse an XML, which is at this url:

try
{
    var xDoc = XDocument.Parse(requestedURL);
    Response.Write("asd: " + xDoc.Descendants("entry").Count());
}
catch (Exception err)
{
    Response.Write(err.Message);
}

but it replies with Data at the root level is invalid. Line 1, position 1.

Where am I wrong?

Answer 1

你应该使用XDocument.Loadnot XDocument.Parse。那是因为XDocument.Parse当您尝试从 URL 加载它时，期望接收 XML 字符串。

编辑

XML 命名空间也有问题。尝试这个

var xDoc = XDocument.Load(requestedURL);
XNamespace ns = "http://www.w3.org/2005/Atom";
var count = xDoc.Descendants(ns + "entry").Count();

http://msdn.microsoft.com/en-us/library/bb343181.aspx

Answer 2

尝试这个。

try
{
  var xDoc = XDocument.Load(requestedURL);
  Response.Write("asd: " + xDoc.Descendants("entry").Count());
}
catch (Exception err)
{
  Response.Write(err.Message);
}