ASP.NET上传大文件解决方案

ASP.NET上传大文件解决方案 【日期 2007-7-15 11:34:07】  【浏览 419】  【回复 0】  编辑文章  删除 【分类 ASP.NET】  【转自skylaugh】 隐藏侧边栏 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  http://blog.joycode.com/saucer/archive/2004/03/16/16225.aspx 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 复制   保存 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 http://krystalware.com/files/slickupload.zip 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  http://blog.joycode.com/dotey/archive/2005/06/12/53557.aspx 宝玉 http://blog.joycode.com/saucer/archive/2004/03/16/16225.aspx 思归 http://www.cnblogs.com/bestcomy/archive/2004/06/09/14267.aspx bestcomy http://krystalware.com/wiki/default.aspx/KrystalWiki.UploadSpike1 http://www.blueidea.com/tech/program/2005/2997.asp ftp 通过Web Services 上传和下载文件 http://dotnet.aspx.cc/ShowDetail.aspx?id=6381BD5F-51F3-4339-4239-1328564A1B2A 上传组件是如何不受settimeout限制的？ http://www.ietf.org/rfc/rfc1867.txt?number=1867 下载 http://support.microsoft.com/default.aspx?scid=kb;en-us;812406&Product=aspnet 上传源代码下载： openlabupload.rar http://files.cnblogs.com/skylaugh/openlabupload.rar

转载于:https://www.cnblogs.com/GavinCome/archive/2007/11/10/954837.html