这次在项目中，用到了大文件上传，要上传的文件有100多m，于是研究现在国内使用的大文件上传的 组件发现用的比较多的有两个控件AspnetUpload 2.0和Lion.Web.UpLoadModule，另外还有思归在它的博客 堂中所说的办法 [url=http://blog.joycode.com/saucer/archive/2004/03/16/16225.aspx]http://blog.joycode.com/saucer/archive/2004/03/16/16225.aspx[/url]    两个控件的方法是：利用隐含的HttpWorkerRequest，用它的GetPreloadedEntityBody 和 ReadEntityBody方法从IIS为ASP.NET建立的pipe里分块读取数据。Chris Hynes为我们提供了这样的一个方案(用HttpModule)，该方案除了允许你上传大文件外，还能实时显示上传进度。     Lion.Web.UpLoadModule和AspnetUpload 两个.NET组件都是利用的这个方案。    当上传单文件时，两个软件的方法是一样的，继承HttpModule        HttpApplication application1 = sender as HttpApplication;    HttpWorkerRequest request1 = (HttpWorkerRequest) ((IServiceProvider) HttpContext.Current).GetService(typeof(HttpWorkerRequest));    try    {     if (application1.Context.Request.ContentType.IndexOf("multipart/form-data") <= -1)     {      return;     }     //Check The HasEntityBody     if (!request1.HasEntityBody())     {      return;     }     int num1 = 0;     TimeSpan span1 = DateTime.Now.Subtract(this.beginTime);     string text1 = application1.Context.Request.ContentType.ToLower();     byte[] buffer1 = Encoding.ASCII.GetBytes(("\r\n--" + text1.Substring(text1.IndexOf("boundary=") + 9)).ToCharArray());     int num2 = Convert.ToInt32(request1.GetKnownRequestHeader(11));     Progress progress1 = new Progress();     application1.Context.Items.Add("FileList", new Hashtable());     byte[] buffer2 = request1.GetPreloadedEntityBody();     num1 += buffer2.Length;     string text2 = this.AnalysePreloadedEntityBody(buffer2, "UploadGUID");     if (text2 != string.Empty)     {      application1.Context.Items.Add("LionSky_UpLoadModule_UploadGUID", text2);     }     bool flag1 = true;     if ((num2 > this.UpLoadFileLength()) && ((0 > span1.TotalHours) || (span1.TotalHours > 3)))     {      flag1 = false;     }     if ((0 > span1.TotalHours) || (span1.TotalHours > 3))     {      flag1 = false;     }     string text3 = this.AnalysePreloadedEntityBody(buffer2, "UploadFolder");     ArrayList list1 = new ArrayList();     RequestStream stream1 = new RequestStream(buffer2, buffer1, null, RequestStream.FileStatus.Close, RequestStream.ReadStatus.NoRead, text3, flag1, application1.Context, string.Empty);     list1.AddRange(stream1.ReadBody);     if (text2 != string.Empty)     {      progress1.FileLength = num2;      progress1.ReceivedLength = num1;      progress1.FileName = stream1.OriginalFileName;      progress1.FileCount = ((Hashtable) application1.Context.Items["FileList"]).Count;      application1.Application["_UploadGUID_" + text2] = progress1;     }     if (!request1.IsEntireEntityBodyIsPreloaded())     {      byte[] buffer4;      ArrayList list2;      int num3 = 204800;      byte[] buffer3 = new byte[num3];      while ((num2 - num1) >= num3)      {       if (!application1.Context.Response.IsClientConnected)       {        this.ClearApplication(application1);       }       num3 = request1.ReadEntityBody(buffer3, buffer3.Length);       num1 += num3;       list2 = stream1.ContentBody;       if (list2.Count > 0)       {        buffer4 = new byte[list2.Count + buffer3.Length];        list2.CopyTo(buffer4, 0);        buffer3.CopyTo(buffer4, list2.Count);        stream1 = new RequestStream(buffer4, buffer1, stream1.FileStream, stream1.FStatus, stream1.RStatus, text3, flag1, application1.Context, stream1.OriginalFileName);       }       else       {        stream1 = new RequestStream(buffer3, buffer1, stream1.FileStream, stream1.FStatus, stream1.RStatus, text3, flag1, application1.Context, stream1.OriginalFileName);       }       list1.AddRange(stream1.ReadBody);       if (text2 != string.Empty)       {        progress1.ReceivedLength = num1;        progress1.FileName = stream1.OriginalFileName;        progress1.FileCount = ((Hashtable) application1.Context.Items["FileList"]).Count;        application1.Application["_UploadGUID_" + text2] = progress1;       }      }      buffer3 = new byte[num2 - num1];      if (!application1.Context.Response.IsClientConnected && (stream1.FStatus == RequestStream.FileStatus.Open))      {       this.ClearApplication(application1);      }      num3 = request1.ReadEntityBody(buffer3, buffer3.Length);      list2 = stream1.ContentBody;      if (list2.Count > 0)      {       buffer4 = new byte[list2.Count + buffer3.Length];       list2.CopyTo(buffer4, 0);       buffer3.CopyTo(buffer4, list2.Count);       stream1 = new RequestStream(buffer4, buffer1, stream1.FileStream, stream1.FStatus, stream1.RStatus, text3, flag1, application1.Context, stream1.OriginalFileName);      }      else      {       stream1 = new RequestStream(buffer3, buffer1, stream1.FileStream, stream1.FStatus, stream1.RStatus, text3, flag1, application1.Context, stream1.OriginalFileName);      }      list1.AddRange(stream1.ReadBody);      if (text2 != string.Empty)      {       progress1.ReceivedLength = num1 + buffer3.Length;       progress1.FileName = stream1.OriginalFileName;       progress1.FileCount = ((Hashtable) application1.Context.Items["FileList"]).Count;       if (flag1)       {        progress1.UploadStatus = Progress.UploadStatusEnum.Uploaded;       }       else       {        application1.Application.Remove("_UploadGUID_" + text2);       }      }     }     byte[] buffer5 = new byte[list1.Count];     list1.CopyTo(buffer5);     this.PopulateRequestData(request1, buffer5);    }    catch (Exception exception1)    {     this.ClearApplication(application1);     throw exception1;    }   而思归所说的方法使用Mime也能上传大文件，在以下地址下载   [url=http://krystalware.com/files/slickupload.zip]http://krystalware.com/files/slickupload.zip[/url]   不过觉得的思归的方法容易很多 相关文章： 让asp.net默认的上传组件支持进度条反映  [url=http://blog.joycode.com/dotey/archive/2005/06/12/53557.aspx]http://blog.joycode.com/dotey/archive/2005/06/12/53557.aspx[/url] // 宝玉 [url=http://blog.joycode.com/saucer/archive/2004/03/16/16225.aspx]http://blog.joycode.com/saucer/archive/2004/03/16/16225.aspx[/url] // 思归 [url=http://skylaugh.cnblogs.com/bestcomy/archive/2004/06/09/14267.aspx]http://www.cnblogs.com/bestcomy/archive/2004/06/09/14267.aspx[/url] // bestcomy [url=http://krystalware.com/wiki/default.aspx/KrystalWiki.UploadSpike1]http://krystalware.com/wiki/default.aspx/KrystalWiki.UploadSpike1[/url] [url=http://www.blueidea.com/tech/program/2005/2997.asp]http://www.blueidea.com/tech/program/2005/2997.asp[/url] //ftp 通过Web Services上传和下载文件 [url=http://dotnet.aspx.cc/ShowDetail.aspx?id=6381BD5F-51F3-4339-4239-1328564A1B2A]http://dotnet.aspx.cc/ShowDetail.aspx?id=6381BD5F-51F3-4339-4239-1328564A1B2A[/url] 上传组件是如何不受settimeout限制的？ [url=http://www.ietf.org/rfc/rfc1867.txt?number=1867]http://www.ietf.org/rfc/rfc1867.txt?number=1867[/url] 下载 [url=http://support.microsoft.com/default.aspx?scid=kb;en-us;812406&Product=aspnet]http://support.microsoft.com/default.aspx?scid=kb;en-us;812406&Product=aspnet[/url]