循环中发生异常，处理如何异常可以让接下来的循环继续进行？

Question

来个代码说明问题：using System;
using System.Collections.Generic;
using System.Text;
using System.Net;namespace Ex
{
    class Program
    {
        static void Main(string[] args)
        {
            Program p = new Program();
            p.test();
            Console.Read();
        }        public void test()
        {
            try
            {
                for (int i = 0; i < 2; i++)
                {
                    Console.WriteLine(i + ":" + 0);                    // 一下这2句话会发生异常
                    HttpWebRequest req = (HttpWebRequest)WebRequest.Create("http://localhost:8088/a.jsp");
                    HttpWebResponse res = (HttpWebResponse)req.GetResponse();                    Console.WriteLine(i + ":" + 1);
                    Console.WriteLine(i + ":" + 2);
                }
            }
            catch (Exception e)
            {                Console.WriteLine(e.Message);
            }
            
        }
    }
}
在i=0的时候发生异常，因为这个请求的page是我故意写的不存在的页面，在i=0的时候会发生异常，但是我想让i有=1的处理机会，我怎么在catch中写代码呢？这个和java中完全不一样，java中发生异常，进入catch快，然后接着往下执行，c#中for代码发生异常，直接break掉了。。

Answer 1

for (int i = 0; i < 2; i++)
                {
            try
            {                    Console.WriteLine(i + ":" + 0);                    // 一下这2句话会发生异常
                    HttpWebRequest req = (HttpWebRequest)WebRequest.Create("http://localhost:8088/a.jsp");
                    HttpWebResponse res = (HttpWebResponse)req.GetResponse();                    Console.WriteLine(i + ":" + 1);
                    Console.WriteLine(i + ":" + 2);
} catch (Exception e)
            {                Console.WriteLine(e.Message);
            }                }

Answer 2

for循环里面用if判断下就好了撒
for(.....)
{
   if(i==0)
   {
       continu;
   }
   .....
}

Answer 3

using System;
using System.Collections.Generic;
using System.Text;
using System.Net;namespace Ex
{
    class Program
    {
        static void Main(string[] args)
        {
            Program p = new Program();
            p.test();
            Console.Read();
        }        public void test()
        {
            for (int i = 0; i < 2; i++)
            {
                Console.WriteLine(i + ":" + 0);
                try
                {  
                    // 一下这2句话会发生异常
                    HttpWebRequest req = (HttpWebRequest)WebRequest.Create("http://localhost:8088/a.jsp");
                    HttpWebResponse res = (HttpWebResponse)req.GetResponse();                    Console.WriteLine(i + ":" + 1);
                    Console.WriteLine(i + ":" + 2);
                }            
                catch (Exception e)
                {                    Console.WriteLine(e.Message);
                }
            }            
        }
    }
}

Answer 4

 public void test()
        {
            try
            {
                for (int i = 0; i < 2; i++)
                {
                    Console.WriteLine(i + ":" + 0);                    // 一下这2句话会发生异常
                    try
                    {
                        HttpWebRequest req = (HttpWebRequest)WebRequest.Create("http://localhost:8088/a.jsp");
                        HttpWebResponse res = (HttpWebResponse)req.GetResponse();
                    }
                    catch
                    {
                        continue;
                    }
                    Console.WriteLine(i + ":" + 1);
                    Console.WriteLine(i + ":" + 2);
                }
            }
            catch (Exception e)
            {                Console.WriteLine(e.Message);
            }        }

Answer 5

using System;
using System.Collections.Generic;
using System.Text;
using System.Net;namespace Ex
{
    class Program
    {
        static void Main(string[] args)
        {
            Program p = new Program();
            p.test();
            Console.Read();
        }        public void test()
        {
            for (int i = 0; i < 2; i++)
            {
                Console.WriteLine(i + ":" + 0);
                try
                {  
                    // 一下这2句话会发生异常
                    HttpWebRequest req = (HttpWebRequest)WebRequest.Create("http://localhost:8088/a.jsp");
                    HttpWebResponse res = (HttpWebResponse)req.GetResponse();
                }            
                catch (Exception e)
                {
                    Console.WriteLine(e.Message);
                }                Console.WriteLine(i + ":" + 1);
                Console.WriteLine(i + ":" + 2);            }            
        }
    }
}

Answer 6

1.在for循环中try，出现异常catch后，会继续往下走
2.在会发生异常的代码前加一个if判断，如果i=0则跳过

Answer 7

用VB.NETOn Error Resume Next
VB.NET编译器会给每条语句添加Goto，忽略异常。C# 里面至今没有等效好用的语句。