XDocument.Load() 错误

发布于 2024-12-08 01:13:18 字数 598 浏览 0 评论 0原文

我有一些代码：

WebRequest request = HttpWebRequest.Create(url);
WebResponse response = request.GetResponse();
using (System.IO.StreamReader sr = 
    new System.IO.StreamReader(response.GetResponseStream()))
{
    System.Xml.Linq.XDocument doc = new System.Xml.Linq.XDocument();
    doc.Load(new System.IO.StringReader(sr.ReadToEnd()));
}

我无法在 XML 文档中加载我的响应。我收到以下错误：

Member 'System.XMl.Linq.XDocument.Load(System.IO.TextReader' cannot be accessed 
with an instance reference; qualify it with a type name instead.

这变得非常令人沮丧。我做错了什么？

原文

I have some code:

WebRequest request = HttpWebRequest.Create(url);
WebResponse response = request.GetResponse();
using (System.IO.StreamReader sr = 
    new System.IO.StreamReader(response.GetResponseStream()))
{
    System.Xml.Linq.XDocument doc = new System.Xml.Linq.XDocument();
    doc.Load(new System.IO.StringReader(sr.ReadToEnd()));
}

I can't load my response in my XML document. I get the following error:

Member 'System.XMl.Linq.XDocument.Load(System.IO.TextReader' cannot be accessed 
with an instance reference; qualify it with a type name instead.

This is becoming really frustrating. What am I doing wrong?

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茶色山野 2024-12-15 01:13:18

与 XmlDocument.Load 不同，XDocument.Load 是静态方法返回一个新的XDocument：

XDocument doc = XDocument.Load(new StringReader(sr.ReadToEnd()));

将流读到底然后创建一个 StringReader 似乎毫无意义。首先创建 StreamReader 也是毫无意义的 - 如果 XML 文档不是采用 UTF-8 格式，则可能会导致问题。更好：

对于 .NET 4，有 XDocument.Load(Stream) 重载：

using (var response = request.GetResponse())
{
    using (var stream = response.GetResponseStream())
    {
        var doc = XDocument.Load(stream);
    }
}

对于 .NET 3.5，没有重载：

using (var response = request.GetResponse())
{
    using (var stream = response.GetResponseStream())
    {
        var doc = XDocument.Load(XmlReader.Create(stream));
    }
}

或者，只需让 LINQ to XML 完成所有 /em> 工作：

XDocument doc = XDocument.Load(url);

编辑：请注意，编译器错误确实为您提供了足够的信息来帮助您继续：它告诉您不能将 XDocument.Load 调用为doc.Load，并给出类型名称。您的下一步应该是查阅文档，其中当然提供了示例。

Unlike XmlDocument.Load, XDocument.Load is a static method returning a new XDocument:

XDocument doc = XDocument.Load(new StringReader(sr.ReadToEnd()));

It seems pretty pointless to read the stream to the end then create a StringReader though. It's also pointless creating the StreamReader in the first place - and if the XML document isn't in UTF-8, it could cause problems. Better:

For .NET 4, where there's an XDocument.Load(Stream) overload:

using (var response = request.GetResponse())
{
    using (var stream = response.GetResponseStream())
    {
        var doc = XDocument.Load(stream);
    }
}

For .NET 3.5, where there isn't:

using (var response = request.GetResponse())
{
    using (var stream = response.GetResponseStream())
    {
        var doc = XDocument.Load(XmlReader.Create(stream));
    }
}

Or alternatively, just let LINQ to XML do all the work:

XDocument doc = XDocument.Load(url);

EDIT: Note that the compiler error did give you enough information to get you going: it told you that you can't call XDocument.Load as doc.Load, and to give the type name instead. Your next step should have been to consult the documentation, which of course gives examples.

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