最近使用多线程同时调用一个Web Service,总是有很多调用报超时,代码类似于下面的代码(为了简化,我把调用Web Service改为使用HttpWebRequest访问一个网址,效果时一样的):
我循环调用100次,但是总是有几十次调用报超时,具体如下:
System.Net.WebException: 操作已超时。
at System.Net.HttpWebRequest.GetResponse()
at HttpRequestTest.HttpRequestTest.MakeWebRequest(Object obj) in g:\my documents\visual studio projects\httprequesttest\httprequesttest.cs:line 35
真的不知道为什么,难道Web Service就不能在多线程的环境下调用!
因为目前找不到原因,暂时放在首页,想向各位请教,明天就撤调,请手下留情,谢谢!
我循环调用100次,但是总是有几十次调用报超时,具体如下:
System.Net.WebException: 操作已超时。
at System.Net.HttpWebRequest.GetResponse()
at HttpRequestTest.HttpRequestTest.MakeWebRequest(Object obj) in g:\my documents\visual studio projects\httprequesttest\httprequesttest.cs:line 35
真的不知道为什么,难道Web Service就不能在多线程的环境下调用!
因为目前找不到原因,暂时放在首页,想向各位请教,明天就撤调,请手下留情,谢谢!
1using System;
2using System.Diagnostics;
3using System.Net;
4using System.Threading;
5
6namespace HttpRequestTest
7{
8 /// <summary>
9 /// Class1 的摘要说明。
10 /// </summary>
11 class HttpRequestTest
12 {
13
14 //[STAThread]
15 static void Main(string[] args)
16 {
17 for(int i = 0; i < 100; i++ )
18 {
19 ThreadPool.QueueUserWorkItem(new WaitCallback(MakeWebRequest),"http://www.163.com");
20 }
21 Console.ReadLine();
22 }
23
24 private static void MakeWebRequest (object obj)
25 {
26 string url = obj as string;
27 HttpWebResponse res = null;
28 try
29 {
30 HttpWebRequest req = (HttpWebRequest)WebRequest.Create (url);
31 req.Timeout = 15000;
32
33 Console.WriteLine ("\nConnecting to " + url + " ");
34
35 res = (HttpWebResponse)req.GetResponse ();
36
37 Console.WriteLine("[" + AppDomain.GetCurrentThreadId() + "] ContentLength:" + res.ContentLength);
38 Console.WriteLine ("Connected.\n");
39
40
41 }
42 catch (Exception e)
43 {
44 Console.WriteLine ("Source : " + e.Source);
45 Console.WriteLine ("Message : " + e.Message);
46 Console.WriteLine(e.ToString());
47 Debug.WriteLine(e.ToString());
48 //Console.WriteLine("StackTrace :" + e.StackTrace);
49 }
50 finally
51 {
52 if (res != null)
53 {
54 res.Close ();
55 }
56 }
57 }
58 }
59}
60
2using System.Diagnostics;
3using System.Net;
4using System.Threading;
5
6namespace HttpRequestTest
7{
8 /// <summary>
9 /// Class1 的摘要说明。
10 /// </summary>
11 class HttpRequestTest
12 {
13
14 //[STAThread]
15 static void Main(string[] args)
16 {
17 for(int i = 0; i < 100; i++ )
18 {
19 ThreadPool.QueueUserWorkItem(new WaitCallback(MakeWebRequest),"http://www.163.com");
20 }
21 Console.ReadLine();
22 }
23
24 private static void MakeWebRequest (object obj)
25 {
26 string url = obj as string;
27 HttpWebResponse res = null;
28 try
29 {
30 HttpWebRequest req = (HttpWebRequest)WebRequest.Create (url);
31 req.Timeout = 15000;
32
33 Console.WriteLine ("\nConnecting to " + url + " ");
34
35 res = (HttpWebResponse)req.GetResponse ();
36
37 Console.WriteLine("[" + AppDomain.GetCurrentThreadId() + "] ContentLength:" + res.ContentLength);
38 Console.WriteLine ("Connected.\n");
39
40
41 }
42 catch (Exception e)
43 {
44 Console.WriteLine ("Source : " + e.Source);
45 Console.WriteLine ("Message : " + e.Message);
46 Console.WriteLine(e.ToString());
47 Debug.WriteLine(e.ToString());
48 //Console.WriteLine("StackTrace :" + e.StackTrace);
49 }
50 finally
51 {
52 if (res != null)
53 {
54 res.Close ();
55 }
56 }
57 }
58 }
59}
60