求大文件上传组件？

[bluelily22]

微软大文件上传的组件用的是什么，最大上传文件大小是多少?
我要上传500M左右的东西怎么办？

[bluelily22]

谢谢楼上的几位，我试了一下
楼上推荐的思归的http://krystalware.com/files/slickupload.zip
试了一下，不错，就是不支持断点续传，传输中断后，文件就被删了,不能再续传

[boytomato]

http://krystalware.com/blog/archive/2004/02/04/181.aspx

[boytomato]

<INPUT style="Z-INDEX: 101; LEFT: 328px; POSITION: absolute; TOP: 8px" type="file">

ms 的上传.默认好象是30M,
你可以在 web.config设置它的最大值,
不过因这它的上传原理要把数据全读到内存然后上传,
改后要是文件大话仍然会出错.....

[tigerwen01]

http://blog.joycode.com/saucer/archive/2004/03/16/16225.aspx

[hchxxzx]

ASP.NET里面,上传最大的文件,可能在225M以下,再大,如何修改都不行.
默认的上传大小是4M.
如果需要上传更大的文件,必须采用其他方法.比如FTP,或者是其他组件比如ASPUPLOAD(不知道有没有NET版),还有,以下地址是讨论在NET中超大文件上传的,你可以去看看.

下面是一些资料,你可参考一下(上面所述地址也在里面)

对于asp.net,默认只允许上传2M文件,增加如下配置,一般可以自定义最大文件大小.
<httpRuntime
executionTimeout="300"
maxRequestLength="40960"
useFullyQualifiedRedirectUrl="false"/>

如果还不行,可以使用思归提供的方案:
我们在上传大文件时都遇到过这样或那样的问题。设置很大的maxRequestLength值并不能完全解决问题，
因为ASP.NET会block直到把整个文件载入内存后，再加以处理。实际上，如果文件很大的话，
我们经常会见到Internet Explorer显示 "The page cannot be displayed - Cannot find server or DNS Error"，
好像是怎么也catch不了这个错误。为什么？因为这是个client side错误，server side端的Application_Error是处理不到的，
可以参考这个帖子研究一下产生这个错误的机理。
handling server error when upload file too large
解决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

IServiceProvider provider = (IServiceProvider) HttpContext.Current;

HttpWorkerRequest wr = (HttpWorkerRequest) provider.GetService(typeof(HttpWorkerRequest));
byte[] bs = wr.GetPreloadedEntityBody();
....
if (!wr.IsEntireEntityBodyIsPreloaded())
{
int n = 1024;
byte[] bs2 = new byte[n];
while (wr.ReadEntityBody(bs2,n) >0)
{
.....
}
}
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：
ASP.NET Upload Magic Part 2
这里有他讲座的PPT文件：
Uploading with ASP.NET (part 1)
Uploading with ASP.NET (part 2)



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
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

[renyu732]

同意，接分．

[flyye_cs]

mark... study

[lei00529]

路过，收一下

大家都是好人啊

[a_cer]

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