jQuery插件ASP.NET应用之AjaxUpload

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本次使用AJAXUPLOAD做为上传客户端无刷上传插件，其最新版本为3.9，官方地址：http://valums.com/ajax-upload/

在页面中引入 jquery.min.1.4.2.js 和 ajaxupload.js

 

 HTML 代码：

上传图片：
浏览

 js代 码：

 服务器端 ajaxuploadhandler.ashx 代码

public void ProcessRequest(HttpContext context)
        {
            context.Response.ContentType = "text/plain";

            HttpPostedFile postedFile = context.Request.Files[0];
            string savePath = "/upload/images/";
            int filelength = postedFile.ContentLength;
            int fileSize = 163600; //150K
            string fileName = "-1"; //返回的上传后的文件名
            if (filelength <= fileSize)
            {

                byte[] buffer = new byte[filelength];

                postedFile.InputStream.Read(buffer, 0, filelength);

                fileName = UploadImage(buffer, savePath, "jpg");

            }

            context.Response.Write(fileName);
        }

        public static string UploadImage(byte[] imgBuffer, string uploadpath, string ext)
        {
            try
            {
                System.IO.MemoryStream m = new MemoryStream(imgBuffer);

                if (!Directory.Exists(HttpContext.Current.Server.MapPath(uploadpath)))
                    Directory.CreateDirectory(HttpContext.Current.Server.MapPath(uploadpath));

                string imgname = CreateIDCode() + "." + ext;

                string _path = HttpContext.Current.Server.MapPath(uploadpath) + imgname;

                Image img = Image.FromStream(m);
                if (ext == "jpg")
                    img.Save(_path, System.Drawing.Imaging.ImageFormat.Jpeg);
                else
                    img.Save(_path, System.Drawing.Imaging.ImageFormat.Gif);
                m.Close();

                return uploadpath + imgname;
            }
            catch (Exception ex)
            {
                return ex.Message;
            }

        }

        public static string CreateIDCode()
        {
            DateTime Time1 = DateTime.Now.ToUniversalTime();
            DateTime Time2 = Convert.ToDateTime("1970-01-01");
            TimeSpan span = Time1 - Time2;   //span就是两个日期之间的差额   
            string t = span.TotalMilliseconds.ToString("0");

            return t;
        }