C# 操作超时正常还是错

net(客户端)调用IIS(服务端)出现503后，就报操作超时错误

接着就出现如下错误：

System.Net.WebException: 操作超时
   在 System.Net.HttpWebRequest.GetRequestStream()

最后一直是这个错误

System.Net.WebException: 操作超时
   在 System.Net.HttpWebRequest.GetRequestStream()

 当服务器恢复正常时，访问已经是200时，这个线程还是返回操作超时，经过N多测试，最后如下一行完美解决：

 修改后的方法为：

 1 public byte[] SendRequest(byte[] data, string urlStr)
 2        {
 3            try
 4            {
 5                Stream streamSend = null;
 6                HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create(urlStr);
 7                myRequest.Method = "POST";
 8                myRequest.ContentType = "text/xml";
 9                myRequest.Accept = "*/*";
10                myRequest.Timeout = 2000;
11                myRequest.UserAgent = "Mozilla-Firefox-Spider(Wenanry)";
12                myRequest.ContentLength = data.Length;
13                //这个在Post的时候，一定要加上，如果服务器返回错误，他还会继续再去请求，不会使用之前的错误数据，做返回数据
14                myRequest.ServicePoint.Expect100Continue = false;
15
16                HttpRequestCachePolicy noCachePolicy = new HttpRequestCachePolicy(HttpRequestCacheLevel.NoCacheNoStore);
17                myRequest.CachePolicy = noCachePolicy;
18
19                try
20                {
21                    streamSend = myRequest.GetRequestStream();
22                    streamSend.Write(data, 0, data.Length);
23                    streamSend.Close();
24                }
25                catch (WebException wex)
26                {
27                    log.Debug("WebException=" + wex.ToString() + ",wex.Status=" + wex.Status);
28                    if (streamSend != null)
29                        streamSend.Close();
30                    streamSend = null;
31                    myRequest = null;
32                    return null;
33                }
34                catch (Exception ex)
35                {
36                    log.Debug("GetRequestStream=" + ex.ToString());
37                    if (streamSend != null)
38                        streamSend.Close();
39                    myRequest = null;
40                    return null;
41                }
42
43                byte[] byteArr = new byte[256];
44                Stream streamRequest = null;
45                try
46                {
47                    streamRequest = myRequest.GetResponse().GetResponseStream();
48                }
49                catch (Exception httpex)
50                {
51                    log.Debug("SendRequest=" + httpex.ToString());
52                    if (streamRequest != null)
53                        streamRequest.Close();
54                    myRequest = null;
55                    return null;
56                }
57                Bytes bytes = new Bytes();
58                int count = streamRequest.Read(byteArr, 0, 256);
59                while (count > 0)
60                {
61                    bytes.writeByteArr(Bytes.byteSub(byteArr, 0, count));
62                    count = streamRequest.Read(byteArr, 0, 256);
63                }
64                streamRequest.Close();
65                return bytes.getByte;
66            }
67            catch (Exception eee)
68            {
69                log.Debug("eee=" + eee.ToString() + eee.Source + eee.StackTrace);
70            }
71            return null;
72        }

太晚了，睡觉。 

C# 操作超时正常还是错,布布扣,bubuko.com

C# 操作超时正常还是错

原文：http://www.cnblogs.com/wangchuang/p/3664131.html