Asp.net获取服务器指定文件夹目录文件并提供下载的方法

本文实例讲述了asp.net获取服务器指定文件夹目录文件并提供下载的方法。分享给大家供大家参考。具体实现方法如下：

string dirpath = httpcontext.current.server.mappath("uploads/");
if (directory.exists(dirpath))
{
       //获得目录信息
       directoryinfo dir = new directoryinfo(dirpath);
       //获得目录文件列表
       fileinfo[] files = dir.getfiles("*.*");
       string[] filenames = new string[files.length];

       //临时数据表
       datatable dt = new datatable();
       dt.columns.add("filename");
      
       foreach (fileinfo fileinfo in files)
       {
    datarow dr = dt.newrow();
    dr["filename"] = fileinfo.name;
    dt.rows.add(dr);

       }
       repeater1.datasource = dt;
       repeater1.databind();
}

if (e.commandname == "down")
{
    try
    {
     string downloadfilename = "~/uploads/" + e.commandargument.tostring();//文件路径
     string filepath = server.mappath(downloadfilename);
     string filename = path.getfilename(filepath);
     fileinfo file = new fileinfo(filepath);
     response.clear();
     response.contenttype = "application/octet-stream";
     response.addheader("content-disposition", "attachment; filename=" + httputility.urlencode(filename, system.text.encoding.utf8));
     response.addheader("content-length", file.length.tostring());
     response.flush();
     response.writefile(filepath);
    }
    catch
    {
 response.write("<script>alert('没有找到下载的源文件')</script>");
    }
}

希望本文所述对大家的asp.net程序设计有所帮助。