SWFUpload无刷新文件批量上传

一、首先将SWFUpload所有文件加入项目中，如图

二、将swfupload和handlers两个文件引入页面中三、将以下代码引用页面中

 <script type="text/javascript">
        var swfu;
        window.onload = function () {
            swfu = new SWFUpload({
                // Backend Settings
                upload_url: "/ashx/CutPhoto.ashx",
                post_params: {
                    "ASPSESSID": "<%=Session.SessionID %>"
                },

                // File Upload Settings
                file_size_limit: "2 MB",
                file_types: "*.jpg;*.gif",
                file_types_description: "JPG Images",
                file_upload_limit: 0,    // Zero means unlimited

                // Event Handler Settings - these functions as defined in Handlers.js
                //  The handlers are not part of SWFUpload but are part of my website and control how
                //  my website reacts to the SWFUpload events.
                swfupload_preload_handler: preLoad,
                swfupload_load_failed_handler: loadFailed,
                file_queue_error_handler: fileQueueError,
                file_dialog_complete_handler: fileDialogComplete,
                upload_progress_handler: uploadProgress,
                upload_error_handler: uploadError,
                upload_success_handler: Show,//这里修改了方法的定义。
                upload_complete_handler: uploadComplete,

                // Button settings
                button_image_url: "/SWFUpload/images/XPButtonNoText_160x22.png",
                button_placeholder_id: "spanButtonPlaceholder",
                button_ 160,
                button_height: 22,
                button_text: '<span class="button">选择上传图片 <span class="buttonSmall">(2 MB Max)</span></span>',
                button_text_style: '.button { font-family: Helvetica, Arial, sans-serif; font-size: 14pt; } .buttonSmall { font-size: 10pt; }',
                button_text_top_padding: 1,
                button_text_left_padding: 5,

                // Flash Settings
                flash_url: "/SWFUpload/swfupload.swf", // Relative to this file
                flash9_url: "/SWFUpload/swfupload_FP9.swf", // Relative to this file

                custom_settings: {
                    upload_target: "divFileProgressContainer"
                },

                // Debug Settings
                debug: false
            });
        }
        //上传成功以后执行该方法
        function Show(file, serverData) {
            var s = serverData.split(':');//接收从服务端返回的数据，按照分号分隔
            if (s[0] == "ok") {
                $("#imgSrc").attr("src", s[1]);
            }
        }
    </script>

四、创建一般处理程序（代码如下）

    if (context.Request["action"].ToString() == "up")
            {
                HttpPostedFile file = context.Request.Files["Filedata"];  //获取上传的文件数据
                string fileName = Path.GetFileName(file.FileName);//获取上传文件的名称
                string fileExt = Path.GetExtension(fileName); //得到文件的扩展名
                if (fileExt == ".jpg")
                {
                    //将上传的图片放到不同的文件夹下（根据日期）
                    string dir = "/UploadImage/" + DateTime.Now.Year + "/" + DateTime.Now.Month + "/" + DateTime.Now.Day + "/";
                    Directory.CreateDirectory(Path.GetDirectoryName(context.Server.MapPath(dir))); //创建文件夹



                    //文件生命名字
                    string furllDir = dir + Common.WebCommon.GetStreamMD5(file.InputStream) + fileExt;  //构建完整的文件路径
                    using (Image img = Image.FromStream(file.InputStream))
                    { //根据上传图片创建一个Image，获取图片的高度与宽度
                        file.SaveAs(context.Server.MapPath(furllDir));  //把图片保存起来
                        context.Response.Write("ok:" + furllDir + ":" + img.Width + ":" + img.Height);//将图片路径与图片的高度与宽度返回浏览器
                    }
                }
            }
            else if (context.Request["action"].ToString() == "cut") {
              //接收参数
                int x = Convert.ToInt32(context.Request.Form["x"]);
                int y = Convert.ToInt32(context.Request.Form["y"]);
                int width = Convert.ToInt32(context.Request.Form["width"]);
                int height = Convert.ToInt32(context.Request.Form["height"]);
                string imgSrc=context.Request.Form["imgSrc"];
                //创建画布
                using (Bitmap map=new Bitmap(width,height))  //将红色div确定范围到画布上
                {
                   //画笔
                    using (Graphics g=Graphics.FromImage(map))
                    {
                        //用画笔将图片画到画布上
                        using(Image img=Image.FromFile(context.Server.MapPath(imgSrc))){
                            //1.指定的是对哪张图片进行操作
                            //2.指定画多么大
                            //3.画img的那一部分
                             g.DrawImage(img,new Rectangle(0,0,width,height),new Rectangle(x,y,width,height),GraphicsUnit.Pixel);
                             string newfileName = Guid.NewGuid().ToString().Substring(0,8);
                             map.Save(context.Server.MapPath("/UploadImage/")+newfileName+".jpg");  //保存截取后的图片
                             context.Response.Write("/UploadImage/"+newfileName+".jpg");
                        }                        
                    }
                }
            }