prevent或处理超时与XmlReader.Create（URI） [英] Prevent or handle time out with XmlReader.Create(uri)

问题描述

有时候，我通过一个URL读取XML时得到一个超时异常。有什么我可以做，以prevent这一点，或者这是与远程服务器有问题？下面是我简单的code：

  XmlDocument的文档=新的XmlDocument（）;
doc.Load（XmlReader.Create（this.RssUrl））;
 

我凸轮跨越后，说的KeepAlive可能会有帮助，但我不知道怎么打发，设置到code以上（或者，甚至是正确的解决方案）：<一href="http://www.velocityreviews.com/forums/t95843-system-webexception-the-operation-has-timed-out.html" rel="nofollow">http://www.velocityreviews.com/forums/t95843-system-webexception-the-operation-has-timed-out.html

这是个例外，请大家帮忙！

 异常详细信息：System.Net.WebException：操作已超时
堆栈跟踪：

[WebException：操作已超时]
   System.Net.HttpWebRequest.GetResponse（）5375213
   System.Xml.XmlDownloadManager.GetNonFileStream（URI URI，ICredentials凭证）+69
   System.Xml.XmlDownloadManager.GetStream（URI URI，ICredentials凭证）3929371
   System.Xml.XmlUrlResolver.GetEntity（URI绝对URI，字符串的作用，类型ofObjectToReturn）+54
   System.Xml.XmlReader.Create（字符串inputUri，XmlReaderSettings设置，XmlParserContext inputContext）+144
   System.Xml.XmlReader.Create（字符串inputUri）+8
 

解决方案

我有这个问题前面，发现这个悬而未决的问题。我发现了一个选择是prevent超时可言，你可以做创建您自己的的WebRequest 与<一个超时href="http://msdn.microsoft.com/en-us/library/system.threading.timeout.infinite.aspx">Timeout.Infinite并将其传递到的XmlReader。

 的WebRequest请求= WebRequest.Create（this.RssUrl）;
request.Timeout = Timeout.Infinite;

使用（WebResponse类响应= request.GetResponse（））
使用（XmlReader的读者= XmlReader.Create（response.GetResponseStream（）））
{
    //等等等等...
}
 

您还可以设置保持活动时间，如果你使用的HttpWebRequest，虽然它在默认情况下实际上是真的，所以应该不会有什么区别。

  HttpWebRequest的要求=（HttpWebRequest的）WebRequest.Create（this.RssUrl）;
request.KeepAlive = TRUE;
 

Sometimes I am getting a time out exception when reading an XML via a URL. Is there something I can do to prevent this, or is this a problem with the remote server? Below is my simple code:

XmlDocument doc = new XmlDocument();
doc.Load(XmlReader.Create(this.RssUrl));

I cam across a post that says KeepAlive may help, but I do not know how to pass that setting into the code above (or if that is even the correct solution): http://www.velocityreviews.com/forums/t95843-system-webexception-the-operation-has-timed-out.html

This is the exception, please help!

Exception Details: System.Net.WebException: The operation has timed out
Stack Trace: 

[WebException: The operation has timed out]
   System.Net.HttpWebRequest.GetResponse() +5375213
   System.Xml.XmlDownloadManager.GetNonFileStream(Uri uri, ICredentials credentials) +69
   System.Xml.XmlDownloadManager.GetStream(Uri uri, ICredentials credentials) +3929371
   System.Xml.XmlUrlResolver.GetEntity(Uri absoluteUri, String role, Type ofObjectToReturn) +54
   System.Xml.XmlReader.Create(String inputUri, XmlReaderSettings settings, XmlParserContext inputContext) +144
   System.Xml.XmlReader.Create(String inputUri) +8

解决方案

I had this problem earlier and found this unanswered question. An option I have found is to prevent the request from timing out at all, which you can do creating your own WebRequest with a timeout of Timeout.Infinite and passing it into the XmlReader.

WebRequest request = WebRequest.Create(this.RssUrl);
request.Timeout = Timeout.Infinite;

using (WebResponse response = request.GetResponse())
using (XmlReader reader = XmlReader.Create(response.GetResponseStream()))
{
    // Blah blah...
}

You can also set the KeepAlive if you use a HttpWebRequest, although it is actually true by default, so it should not make any difference.

HttpWebRequest request = (HttpWebRequest)WebRequest.Create(this.RssUrl);
request.KeepAlive = true;

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