来自HttpReadStream.Finalize（）的另一个ObjectDisposedException [英] Another ObjectDisposedException from HttpReadStream.Finalize()

问题描述

您好，

在尝试完成HttpReadStream时，我一直在gc线程上遇到ObjectDisposedException

 ObejectDisposedException 
 Sytstem.Threading.Timer.throwIfDisposed（）
 Sytstem.Threading.Timer.Change（UInt32dueTime，UINT32周期）
 Sytstem.Threading.Timer.Change（UInt32dueTime，UINT32周期）
 Sytstem.Net.HttpWebRequest.startReadWriteTimer（）
 Sytstem.Net.HttpWebRequest.ConnectionClient.Read（Byte [] data，Int32 offset，Int32 length）
 Sytstem.Net.HttpReadStream.NetworkRead（Byte [] data ，Int32 offset，Int32 length）
 Sytstem.Net.ContentLengthReadStream.doRead（Byte [] buffer，Int32 offset，Int32 length）
 Sytstem.Net.HttpReadStream.ReadToDrain（Byte [] buffer，Int32 offset， INT32长度）
 Sytstem.Net.HttpReadStream.doClose（）
 Sytstem.Net.ContentLengthReadStream.doClose（）
 Sytstem.Net.HttpReadStream.Finalize（）

此问题已在本论坛的几个主题中进行了讨论：

 http://social.msdn.microsoft.com/Forums/en/netfxcompact/thread/276092ad-3724-4e79-81a6-511adb8bbc86 
 
 http ：//groups.google.com/group/microsoft.public.dotnet.framework.compactframework/browse_thread/thread/44ea29515c5cd2b0？pli = 1 
 
 http://social.msdn.microsoft.com/论坛/ zh / vssmartdevicesvbcs / thread / 28cc3007-ca4e-4f59-b610-8e5e3307ceb4 

我已经尝试了他们所有的建议，但没有任何帮助。  问题仍然​​存在。

这是我的代码：

 public static string SendWebPOST（string strUrl，string strPostData）{
 //定义获取数据所需的变量
 HttpWebRequest hwRequest = null; 
 string strResponse = null; 
 
 //创建WebRequest对象并获取Response流
 Uri myUri = new Uri（strUrl）; 
 
 #if PocketPC 
 ServicePointManager.CertificatePolicy = new AcceptAllCertificatePolicy（）; 
 #endif 
 hwRequest =（HttpWebRequest）WebRequest.Create（myUri）; 
 hwRequest.Method =" POST" ;; 
 hwRequest.ContentType =" application / x-www-form-urlencoded" ;; 
 hwRequest.ContentLength = strPostData.Length; 
 hwRequest.KeepAlive = false; //这就是为了给PHP WEB服务器打电话！ 
 
 //发送发布数据。使用（StreamWriter sw = new StreamWriter（hwRequest.GetRequestStream（）））{
 sw.Write（strPostData）;在StreamWriter 
上调用MAKE SURE CLOSE; 
 //sw.Flush（）; 
 sw.Close（）; 
} 
 
 //使用（HttpWebResponse hwResponse =（HttpWebResponse）hwRequest.GetResponse（））读取响应
 {
 try {
 using（StreamReader） sr = new StreamReader（hwResponse.GetResponseStream（）））{
 strResponse = sr.ReadToEnd（）; 
} 
} 
 finally {
 hwResponse.Close（）; 
} 
} 
 
 //返回响应
 return strResponse; 
} 

我还缺少什么？  

谢谢。

解决方案

尝试此更改：

 
    StreamWriter   sw   =     new     StreamWriter  （  hwRequest  。   GetRequestStream  （））;   
 sw  。 写 （  strPostData  ） ;  
 
  ...  
 
然后将sw.Close（）移动到控制流的某个地方，也许移到finally块中。
 
 如果异常仍然 发生尝试移动它。 
 
 
   
 
   
 
   
 
   
 

Hello,

I keep getting ObjectDisposedException on the gc thread when trying to finalize HttpReadStream

ObejectDisposedException
Sytstem.Threading.Timer.throwIfDisposed()
Sytstem.Threading.Timer.Change(UInt32dueTime, Uint32 period)
Sytstem.Threading.Timer.Change(UInt32dueTime, Uint32 period)
Sytstem.Net.HttpWebRequest.startReadWriteTimer()
Sytstem.Net.HttpWebRequest.ConnectionClient.Read(Byte[] data, Int32 offset, Int32 length)
Sytstem.Net.HttpReadStream.NetworkRead (Byte[] data, Int32 offset, Int32 length)
Sytstem.Net.ContentLengthReadStream.doRead(Byte[] buffer, Int32 offset, Int32 length)
Sytstem.Net.HttpReadStream.ReadToDrain (Byte[] buffer, Int32 offset, Int32 length)
Sytstem.Net.HttpReadStream.doClose()
Sytstem.Net.ContentLengthReadStream.doClose ()
Sytstem.Net.HttpReadStream.Finalize()

This issue has been discussed in a few threads on this forum:

http://social.msdn.microsoft.com/Forums/en/netfxcompact/thread/276092ad-3724-4e79-81a6-511adb8bbc86

http://groups.google.com/group/microsoft.public.dotnet.framework.compactframework/browse_thread/thread/44ea29515c5cd2b0?pli=1

http://social.msdn.microsoft.com/Forums/zh/vssmartdevicesvbcs/thread/28cc3007-ca4e-4f59-b610-8e5e3307ceb4

I've tried all their suggestions, but nothing helps.  The problem still occurs.

Here is my code:

public static string SendWebPOST(string strUrl, string strPostData) {
            //Define the variables needed to grab the data
            HttpWebRequest hwRequest = null;
            string strResponse = null;

            //Create the WebRequest object and get the Response stream
            Uri myUri = new Uri(strUrl);

#if PocketPC
            ServicePointManager.CertificatePolicy = new AcceptAllCertificatePolicy();
#endif
            hwRequest = (HttpWebRequest)WebRequest.Create(myUri);
            hwRequest.Method = "POST";
            hwRequest.ContentType = "application/x-www-form-urlencoded";
            hwRequest.ContentLength = strPostData.Length;
            hwRequest.KeepAlive = false; //THIS MUST BE HERE FOR THE CALL TO THE PHP WEB SERVER!

            // Send the Post Data. MAKE SURE CLOSE is called on StreamWriter
            using (StreamWriter sw = new StreamWriter(hwRequest.GetRequestStream())) {
                sw.Write(strPostData);
                //sw.Flush();
                sw.Close();
            }

            // Read the Response
            using (HttpWebResponse hwResponse = (HttpWebResponse)hwRequest.GetResponse()) {
                try {
                    using (StreamReader sr = new StreamReader(hwResponse.GetResponseStream())) {
                        strResponse = sr.ReadToEnd();
                    }
                }
                finally {
                    hwResponse.Close();
                }
            }

            //Return the response
            return strResponse;
        }

What am I still missing?  

Thanks.

解决方案

Try this change:

            StreamWriter sw = new StreamWriter(hwRequest.GetRequestStream());
            sw.Write(strPostData);
... 
Then move sw.Close(); somewhere down the control flow stream, perhaps into finally block. 
If exception still occurs try moving it around.

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