关于File类Open方法中FileShare.ReadWrite的测试方法问题！

[wokagoka]

我想测试的是当我的ASP.NET多个请求正在访问文件的时候，我有一个程序会在后台修改该文件，以下是两种测试方法。

以下代码在跑时会出现文件访问冲突！

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Threading;

namespace FileShareTest
{
    class Program
    {
        static void Main(string[] args)
        {
            FileWriter fw = new FileWriter();
            FileReader fr = new FileReader();
            Thread thw = new Thread(new ParameterizedThreadStart(fw.Run));
            Thread thr = new Thread(new ParameterizedThreadStart(fr.Run));
            Flag.IsRun = true;
            thw.Start();
            thr.Start();
            Console.ReadKey();
            Flag.IsRun = false;
        }
    }

    static class Flag
    {
        private static bool isRun;
        public static bool IsRun
        {
            get { return isRun; }
            set { isRun = value; }
        }
    }
    class FileWriter
    {
        private int iRequest = 0;
        public int GetRequest()
        {
            return iRequest;
        }

        public void Run(object obj)
        {
            while (Flag.IsRun)
            {
                //Random r = new Random(DateTime.Now.Second);
                //try
                //{

                //    using (FileStream fs = File.Open(@"D:\Work\Samples\FileShareTest\bin\1.txt", FileMode.Open, FileAccess.ReadWrite, FileShare.Read))
                //    {
                //        try
                //        {
                //            using (StreamWriter sw = new StreamWriter(fs))
                //            {
                //                try
                //                {
                //                    sw.Write(r.Next(1000000, 100000000));
                //                    sw.Write(r.Next(1000000, 100000000));
                //                    iRequest++;
                //                    Console.WriteLine("Writed**************Writed**************Writed**************Writed**************Writed**************Writed**************Writed**************Writed**************Writed**************Writed**************Writed**************Writed**************Writed**************Writed**************Writed**************Writed**************Writed**************Writed**************");
                //                }
                //                catch (Exception ex)
                //                {
                //                    throw ex;
                //                }
                //                finally
                //                {
                //                    sw.Close();
                //                }
                //            }
                //        }
                //        finally
                //        {
                //            fs.Close();
                //        }
                //    }
                //}
                //catch (IOException ex)
                //{
                //    Console.WriteLine(string.Format("WritedCount {0}", iRequest));

                //    throw ex;
                //}
                //finally
                //{ 
                    
                //}

                //Thread.Sleep(100);

                File.Copy(@"D:\Work\Samples\FileShareTest\bin\1.txt", @"D:\Work\Samples\FileShareTest\bin\Debug\test.txt", true);
            }
        }
    }

    class FileReader
    {
        private int iRequest = 0;
        public int GetRequest()
        {
            return iRequest;
        }

        public void Run(object obj)
        {
            while (Flag.IsRun)
            {

                using (FileStream fs = File.Open(@"D:\Work\Samples\FileShareTest\bin\Debug\test.txt", FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
                {
                    try
                    {
                       Console.WriteLine(string.Format("Read {0}", ++iRequest));                       
                    }
                    catch (System.IO.IOException ioEx)
                    {
                        Console.WriteLine("B:IOException.");
                    }
                    finally
                    {
                        fs.Close();
                    }
                }
            }
        }
    }
}

以下代码不会冲突！

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Threading;

namespace MulThreadReadAndWriteFile
{
    class Program
    {

        private static List<FileStream> list;
        static void Main(string[] args)
        {
            if (list == null)
            {
                list = new List<FileStream>();
            }
            string str1, str2;
            for (int i = 0; i < 10000000; i++)
            {
                Thread t1 = new Thread(new ParameterizedThreadStart(OpenFile));
                Thread t2 = new Thread(new ParameterizedThreadStart(WriteFile));
                str1 = string.Format("{0}-1", i);
                str2 = string.Format("{0}-2", i);
                t1.Start(str1);
                t2.Start(str2);
                
            }

            for (int i = 0; i < list.Count - 1; i++)
            {
                list[i].Close();

                //Console.WriteLine("Closed file");
            }

            Console.ReadKey();
        }

        private static void OpenFile(object obj)
        {
           //d Console.WriteLine(obj);
            FileStream stream = File.Open(@"D:\Work\Samples\FileShareTest\bin\Debug\test.txt", FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
            
            try
            {
                list.Add(stream);
            }
            catch (Exception ex)
            {
                throw ex;
            }
            finally
            {
                //Console.WriteLine("Open file");
            }

        }

        private static void ReplaceFile()
        {
            File.Copy(@"D:\WindRes\ImagePool\Latest\Company\source.txt", @"D:\WindRes\ImagePool\Latest\Company\typecode\dest.txt", true);
            Console.WriteLine("Replace file");
        }

        private static void WriteFile(object obj)
        {
            Console.WriteLine(obj);
            FileStream stream = File.Open(@"D:\WindRes\ImagePool\Latest\Company\typecode\dest.txt", FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite);
            Console.WriteLine(obj);
            try
            {

                byte[] btData = new UTF8Encoding().GetBytes("I am dest. Writed file");

                stream.Write(btData, 0, btData.Length);                
            }
            catch (Exception ex)
            {
                throw ex;
            }
            finally
            {
                //Console.WriteLine("Writed file");
                stream.Close();
            }
        }
    }
}

[StillMiss]

我不知道，来学习

[wokagoka]

哎……

[wokagoka]

咔咔

[wokagoka]

谁知道呀，人呢