code/Athena0.0.1/common/Util/File/FileDownHelper.cs

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using System;
using System.IO;
using System.Web;
using System.Threading;
namespace Athena.common.Util
{
    /// <summary>
    /// 文件下载类
    /// </summary>
    public class FileDownHelper
    {
        public FileDownHelper()
        { }
        /// <summary>
        /// 参数为虚拟路径
        /// </summary>
        public static string FileNameExtension(string FileName)
        {
            return Path.GetExtension(MapPathFile(FileName));
        }

        /// <summary>
        /// 获取物理地址
        /// </summary>
        public static string MapPathFile(string FileName)
        {
            return HttpContext.Current.Server.MapPath(FileName);
        }
        /// <summary>
        /// 验证文件是否存在
        /// </summary>
        /// <param name="FileName"></param>
        /// <returns></returns>
        public static bool FileExists(string FileName)
        {
            string destFileName = FileName;
            if (File.Exists(destFileName))
            {
                return true;
            }
            else
            {
                return false;
            }
        }
        /// <summary>
        /// 普通下载
        /// </summary>
        /// <param name="FileName">文件虚拟路径</param>
        ///  /// <param name="name">返回客户端名称</param>
        public static void DownLoadold(string FileName, string name)
        {
            string destFileName = FileName;
            if (File.Exists(destFileName))
            {
                FileInfo fi = new FileInfo(destFileName);
                HttpContext.Current.Response.Clear();
                HttpContext.Current.Response.ClearHeaders();
                HttpContext.Current.Response.Buffer = false;
                HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(name, System.Text.Encoding.UTF8));