asp.net+swfupload 多图片批量上传(附源码下载)

get='_blank'>asp.net的文件上传都是单个文件上传方式，无法执行一次性多张图片批量上传操作，要实现多图片批量上传需要借助于flash，通过flash选取多个图片(文件)，然后再通过后端服务进行上传操作.

本次教程所使用的flash上传文件是 swfupload,下面会有源码下载链接。

使用工具 vs 2010。

演示效果图

第一步 新建一个web项目

第二步 引入所需swfuplod文件（swfupload.swf,js,css等)

第三步 新建一个一般处理程序(upload.ashx)

upload.ashx程序文件代码

using System;using System.Collections.Generic;using System.Web;using System.IO; namespace yuyue.upload{ /// <summary> /// upload 的摘要说明 /// </summary> public class upload : IHttpHandler {  public void ProcessRequest(HttpContext context)  {   context.Response.ContentType = "text/plain";   try   {     HttpPostedFile file;       for (int i = 0; i < context.Request.Files.Count; ++i)       {        file = context.Request.Files[i];        if (file == null || file.ContentLength == 0 || string.IsNullOrEmpty(file.FileName)) continue;        string filename = DateTime.Now.ToString("yyyyMMddHHmmss") + RndNumStr(6) + Path.GetExtension(file.FileName); //文件名=上传日期+随机字符串+扩展名（可避免多人上传是第一名问题)         /********************文件夹**************************/        string year=DateTime.Now.Year.ToString();        string monthday = DateTime.Now.ToString("MMdd");        if (!Directory.Exists(HttpContext.Current.Server.MapPath("/uploads/")+year))        {          Directory.CreateDirectory(HttpContext.Current.Server.MapPath("/uploads/") + year);        }        if (!Directory.Exists(HttpContext.Current.Server.MapPath("/uploads/") + year + "/" + monthday))        {          Directory.CreateDirectory(HttpContext.Current.Server.MapPath("/uploads/") + year + "/" + monthday);        }        file.SaveAs(HttpContext.Current.Server.MapPath("/uploads/" + year + "/" + monthday + "/" + filename));        context.Response.Write("/uploads/" + year + "/" + monthday + "/" + filename);//输出上传地址以用于前台js获取       }    }    catch (Exception ex)    {      context.Response.StatusCode = 500;      context.Response.Write(ex.Message);      context.Response.End();    }    finally    {      context.Response.End();    } } #region 该方法用于生成指定位数的随机字符串 /// <summary> /// 该方法用于生成指定位数的随机字符串 /// </summary> /// <param name="VcodeNum">参数是随机数的位数</param> /// <returns>返回一个随机数字符串</returns> public static string RndNumStr(int VcodeNum) {   string[] source = { "0", "1", "1", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z" };    string checkCode = String.Empty;   Random random = new Random();   for (int i = 0; i < VcodeNum; i++)   {     checkCode += source[random.Next(0, source.Length)];   }   return checkCode; } #endregion public bool IsReusable {  get  {   return false;  } } }}

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原标题：asp.net+swfupload 多图片批量上传(附源码下载)

关键词：ASP.NET