mvc 大檔案下載下傳

​

檔案下載下傳類：

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Web;
using System.Web.Mvc;

namespace pxcom
{
    /// <summary>
    ///
    /// </summary>
    public class FileResult : ActionResult
    {
        private readonly string _filePath;//檔案路徑
        private readonly string _fileName;//檔案名稱
        public FileResult(string filePath, string fileName)
        {
            _filePath = filePath;
            _fileName = fileName;
        }

        public override void ExecuteResult(ControllerContext context)
        {
            string fileName = _fileName;
            HttpResponseBase response = context.HttpContext.Response;
            if (File.Exists(_filePath))
            {
                FileStream fs = null;
                byte[] fileBuffer = new byte[1024];//每次讀取1024位元組大小的資料
                try
                {
                    using (fs = File.OpenRead(_filePath))
                    {
                        long totalLength = fs.Length;
                        response.ContentType = "application/octet-stream";
                        response.AddHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlEncode(fileName));
                        while (totalLength > 0 && response.IsClientConnected)//持續傳輸檔案
                        {
                            int length = fs.Read(fileBuffer, 0, fileBuffer.Length);//每次讀取1024個位元組長度的内容
                            fs.Flush();
                            response.OutputStream.Write(fileBuffer, 0, length);//寫入到響應的輸出流
                            response.Flush();//重新整理響應
                            totalLength = totalLength - length;
                        }
                        response.Close();//檔案傳輸完畢，關閉相應流
                    }
                }
                catch (Exception ex)
                {
                    response.Write(ex.Message);
                }
                finally
                {
                    if (fs != null)
                        fs.Close();//最後記得關閉檔案流      

控制器：

public ActionResult GetFile(string url)
        {
            string path = pxcom.Util.GetKejianPath() + url;
            var filename = Path.GetFileName(path);
            return new      

public static void Down(string url,string saveFileName)
        {
            string svr = System.Configuration.ConfigurationManager.AppSettings["svraddress"];
            url = svr + "/" + url;

            new