在线文件下载

using System.IO;
using System.Net;
using System.Collections.Generic;
using ICSharpCode.SharpZipLib.Zip;

 

1.对多个文件进行下载：

经过修改的ICSharpCode.SharpZipLib.dll：

https://files.cnblogs.com/pingyangcst/SrcSamples修改过.rar

用法：

public void Download(IEnumerable<string> files, string zipFileName, string ServerFilePath)

    {

        //根据所选文件打包下载

        MemoryStream ms = new MemoryStream();

        byte[] buffer = null;

 

        using (ZipFile file = ZipFile.Create(ms))

        {

            file.BeginUpdate();

            foreach (var item in files)

            {

                file.Add(HttpContext.Current.Server.MapPath(ServerFilePath) + item);

            }

            file.CommitUpdate();

 

            buffer = new byte[ms.Length];

            ms.Position = 0;

            ms.Read(buffer, 0, buffer.Length);

        }

 

        HttpContext.Current.Response.AddHeader("content-disposition", "attachment;filename=" + zipFileName);

        HttpContext.Current.Response.BinaryWrite(buffer);

        HttpContext.Current.Response.Flush();

        HttpContext.Current.Response.End();

    }         

 

调用

List<string> files = new List<string>();

files.Add(filename);// 可以添加多项

MyNameTransfom.Download(files, "Test.zip", "~/DownLoadPath/");

2. 下载单个文件

 public static void DownLoadFile(string ServerFilePath)

    {

    //   string s = HttpContext.Current.Request.PhysicalApplicationPath;

       string filePath = HttpContext.Current.Server.MapPath(ServerFilePath);

       if (File.Exists(filePath))

       {

         FileInfo file = new FileInfo(filePath);

         HttpContext.Current.Response.ContentEncoding =

System.Text.Encoding.GetEncoding("UTF-8");

      //解决中文乱码              

      HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment; filename=" + HttpContext.Current.Server.UrlEncode(file.Name));

        //解决中文文件名乱码     

 

      HttpContext.Current.Response.AddHeader("Content-length", file.Length.ToString());

      HttpContext.Current.Response.ContentType = "appliction/octet-stream";

      HttpContext.Current.Response.WriteFile(file.FullName);

      HttpContext.Current.Response.End();

     }

}

调用：

string TheFileName = "~/ DownLoadPath /" +FileName;

test.DownLoadFile(TheFileName);

 

 以上代码在Windows 2003 +Visual 2008环境测试.