自分で書いたファイルにアップロードされたクラス

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.IO;
using System.Runtime.Remoting.Messaging;
namespace uploadfiles
{
 /// <summary>
 /// ClassUpload      。
 /// </summary>
 /*
  wenconfig     
  <httpRuntime maxRequestLength="1048576" executionTimeout="3600" />
  <!-- maxRequestLength：   ASP.NET 
     HTTP          。                                 。       KB    。     4096 KB 
  (4 MB)。executionTimeout：     ASP.NET      ，           。            ，          
  DNS                ，         ，      。 
      -->
  */
 /*
  Machine.config     
  <processModel 
         enable="true"
         timeout="15" 
         idleTimeout="25"
         shutdownTimeout="5"
         requestLimit="1000"
         requestQueueLimit="500"
         responseDeadlockInterval="00:03:00"              
         responseRestartDeadlockInterval="Infinite"
         memoryLimit="80"
         webGarden="true"
         maxWorkerThreads="25"
         maxIoThreads="25"/>
   <!-- 
        ，            ：</P><XMP> aspnet_wp.exe (PID: 1520)    ，          460 MB（   RAM      60）。
 </XMP>
 <P>         ，         Machine.config     <processModel>    memoryLimit     。 
    -->
  */
 public class ClassUpload
 {
  public ClassUpload()
  {
   //
   // TODO:            
   //
  }
  private System.IO.MemoryStream m;
  private System.IO.Stream fs;
        private string _filename;        //       
        private int _maxlength;          //          (  )
  private string _FilePath;        //          
  private int    _length = 0;      //      (  )
  private string _savepath;        //      
  private string _savename;        //         
  private string _fullpath;        //         
        
  /// <summary>
  ///             (  )
  /// </summary>
  public int length
  {
   get
   {
    return _length;
   }
  }
        /// <summary>
        ///       
        /// </summary>
  public string savepath
  {
   get
   {
    return _savepath;

   }
  }
        /// <summary>
        ///            
        /// </summary>
  public string savename
  {
   get
   {
    return _savename;

   }
  }
  /// <summary>
  ///             
  /// </summary>
  public string fullpath
  {
   get
   {
    return _fullpath;
   }
  }
     /// <summary>
     ///           
     /// </summary>
  public string filepath
  {
   get
   {
    return _FilePath;

   }
  }
  
  /// <summary>
  ///       
  /// </summary>
  /// <param name="MyFile">System.Web.UI.HtmlControls.HtmlInputFile</param>
  /// <param name="savepath">           </param>
  /// <param name="maxlength">           </param>
  public string upload(System.Web.UI.HtmlControls.HtmlInputFile MyFile,string savepath,int maxlength)
  {
   this._savepath = savepath;
   this._maxlength = maxlength;
   //            
   if(MyFile.PostedFile != null)
   {
    System.Web.HttpFileCollection oFiles;
    oFiles = System.Web.HttpContext.Current.Request.Files;

    if(oFiles.Count < 1)
    {
     return "     !";
    }

    _FilePath = oFiles[0].FileName;
    if(_FilePath == "" || _FilePath == null)
    {
     return "       !";
    }
    _filename = "."+_FilePath.Substring(_FilePath.LastIndexOf(".")+1);
    //_contentlength = oFiles[0].ContentLength.ToString();

    //Response.Write(FileName+FilePath);
    if(oFiles[0].ContentLength>this._maxlength)
    {
     return "        ";
    }
    else
    {
     try
     {
      //          。
      byte[] b = new byte[oFiles[0].ContentLength];
      //System.IO.Stream fs;
      fs = (System.IO.Stream)oFiles[0].InputStream;
      fs.Read(b, 0, oFiles[0].ContentLength);
      //         UploadFile
      return this.UploadFile(b,this._filename,this._savepath);
      //int value = Convert.ToInt32(asy.AsyncState);
      
     }
     catch(Exception ex)
     {
      //Response.Write(ex.Message);
      return ex.Message;
     }
     finally
     {
         fs.Close();
     }
    }
   }
   else
   {
    //Response.Write("     ");
    return "     ";
   }
  }

  private string UploadFile(byte[] fs,string FileName,string savepath)
  {
   try
   {
     //           ，            。
     m = new MemoryStream(fs);
        this._length = fs.Length;
        //System.Web.HttpContext.Current.Server.MapPath(".") + @"\\images\"
     //        ，       。
        this._fullpath = this._savepath+ names()+FileName;
     FileStream f = new FileStream(this._fullpath, FileMode.Create);
        this._savename = names()+FileName;
     //              
     m.WriteTo(f);
     m.Close();
     f.Close();
     f = null;
     m = null;
    
    return "        !";
   }
   catch(Exception ex)
   {
    return ex.Message;
   }
  }
  //   ( , , , , , )+       
  private string names()
  {   
   Random rm = new Random(System.Environment.TickCount);
   return System.DateTime.Now.ToString("yyyyMMddhhmmss")+rm.Next(1000,9999).ToString();
  }

 }
}