swfupload上传方法封装

function fileQueueError(file,errorCode,message) {
? ? try {
? ? ? ? switch (errorCode) {
? ? ? ? ? ? case SWFUpload.QUEUE_ERROR.FILE_EXCEEDS_SIZE_LIMIT:
? ? ? ? ? ? ? ? art.dialog({ content: "文件过大,请选择500k以下的文件",title: "错误",lock: true,width: 350,icon: "error" });
? ? ? ? ? ? ? ? break;
? ? ? ? ? ? case SWFUpload.QUEUE_ERROR.ZERO_BYTE_FILE:
? ? ? ? ? ? ? ? art.dialog({ content: "无法上传零字节文件",icon: "error" });
? ? ? ? ? ? ? ? break;
? ? ? ? ? ? case SWFUpload.QUEUE_ERROR.INVALID_FILETYPE:
? ? ? ? ? ? ? ? art.dialog({ content: "不支持的文件类型",icon: "error" });
? ? ? ? ? ? ? ? break;
? ? ? ? ? ? default:
? ? ? ? ? ? ? ? if (file !== null) {
? ? ? ? ? ? ? ? ? ? art.dialog({ content: "未处理的错误",icon: "error" });
? ? ? ? ? ? ? ? }
? ? ? ? ? ? ? ? break;
? ? ? ? }
? ? } catch (ex) {
? ? ? ? this.debug(ex);
? ? }
}


function fileDialogComplete(numFilesSelected,numFilesQueued) {
? ? try {
? ? ? ? var obj = this;
? ? ? ? if (numFilesQueued > 0) {
? ? ? ? ? ??
? ? ? ? ? ? ? ? obj.startUpload();
? ? ? ? }
? ? } catch (ex) {
? ? ? ? this.debug(ex);
? ? }
}


function uploadProgress(file,bytesLoaded) {
? ? try {
? ? ? ??
? ? } catch (ex) {
? ? ? ? this.debug(ex);
? ? }
}


function uploadSuccess(file,serverData) {
? ? try {
? ? ? ? var json = eval("(" + serverData + ")");
? ? ? ? if (json.err == "0") {
? ? ? ? ? ? $("#img").attr("src",json.data);
? ? ? ? ? ? $("#himg").val(json.data);
? ? ? ? }
? ? ? ? else {
? ? ? ? ? ? art.dialog({ content: json.msg,lock: true });
? ? ? ? }


? ? } catch (ex) {
? ? ? ? this.debug(ex);
? ? }
}


function uploadComplete(file) {
? ? try {
? ? ? ? if (this.getStats().files_queued > 0) {
? ? ? ? ? ? this.startUpload();
? ? ? ? }


? ? } catch (ex) {
? ? ? ? this.debug(ex);
? ? }
}


function uploadError(file,message) {
? ? try {
? ? ? ? switch (errorCode) {
? ? ? ? ? ? case SWFUpload.UPLOAD_ERROR.FILE_CANCELLED:
? ? ? ? ? ? ? ? try {
? ? ? ? ? ? ? ? }
? ? ? ? ? ? ? ? catch (ex1) {
? ? ? ? ? ? ? ? ? ? this.debug(ex1);
? ? ? ? ? ? ? ? }
? ? ? ? ? ? ? ? break;
? ? ? ? ? ? case SWFUpload.UPLOAD_ERROR.UPLOAD_STOPPED:
? ? ? ? ? ? ? ? ? ? try {
? ? ? ? ? ? ? ? ? ? }
? ? ? ? ? ? ? ? ? ? catch (ex2) {
? ? ? ? ? ? ? ? ? ? ? ? this.debug(ex2);
? ? ? ? ? ? ? ? ? ? }
? ? ? ? ? ? case SWFUpload.UPLOAD_ERROR.UPLOAD_LIMIT_EXCEEDED:
? ? ? ? ? ? ? ? break;
? ? ? ? ? ? default:
? ? ? ? ? ? ? ? break;
? ? ? ? }
? ? } catch (ex3) {
? ? ? ? this.debug(ex3);
? ? }
}




function InitMySwf(settings,swfObj) {
? ? if (settings.buttonId == undefined) {
? ? ? ? art.dialog({ title: "错误",content: "请给上传控件指定容器ID",drag: false });
? ? ? ? return;
? ? }
? ? var upload_url = "/handler/UpLoadImgFile.ashx";
? ? if (settings.upload_url != undefined) {
? ? ? ? upload_url = settings.upload_url;
? ? }
? ? var file_queue_error_handler = fileQueueError;
? ? if (settings.file_queue_error_handler != undefined) {
? ? ? ? file_queue_error_handler = settings.file_queue_error_handler;
? ? }
? ? var upload_progress_handler = uploadProgress;
? ? if (settings.upload_progress_handler != undefined) {
? ? ? ? upload_progress_handler = settings.upload_progress_handler;
? ? }


? ? var upload_error_handler = uploadError;
? ? if (settings.upload_error_handler != undefined) {
? ? ? ? upload_progress_handler = settings.upload_progress_handler;
? ? }
? ? var upload_success_handler = uploadSuccess;
? ? if (settings.upload_success_handler != undefined) {
? ? ? ? upload_success_handler = settings.upload_success_handler;
? ? }
? ? var upload_complete_handler = uploadComplete;
? ? if (settings.upload_complete_handler != undefined) {
? ? ? ? upload_complete_handler = settings.upload_complete_handler;
? ? }
? ? var file_dialog_complete_handler = fileDialogComplete;
? ? if (settings.file_dialog_complete_handler != undefined) {
? ? ? ? file_dialog_complete_handler = settings.file_dialog_complete_handler;
? ? }
? ? var button_width = 72;
? ? if (settings.button_width != undefined) {
? ? ? ? button_width = settings.button_width;
? ? }
? ? var button_height = 29;
? ? if (settings.button_height != undefined) {
? ? ? ? button_height = settings.button_height;
? ? }
? ? var filetype = "*.jpg;*.png;*.gif";
? ? if (settings.file_types != undefined) {
? ? ? ? filetype = settings.file_types;
? ? }
? ? var action = "upload";
? ? if (settings.action != undefined) {
? ? ? ? action = settings.action;
? ? }
? ??
? ? var buttonId = settings.buttonId;
? ? swfObj = new SWFUpload({
? ? ? ? // 基本设置
? ? ? ? upload_url: upload_url,? ? ? ? post_params: {
? ? ? ? ? ? "ASPSESSID": Math.random(),? ? ? ? ? ? ac: action
? ? ? ? },? ? ? ? // 上传文件设置
? ? ? ? file_size_limit: "0",? ? ? ? file_types: filetype,? ? ? ? file_types_description: "支持上传的格式",? ? ? ? file_upload_limit: "500",? ?// 0表示不限制选择文件的数量


? ? ? ? // 定义事件				
? ? ? ? file_queue_error_handler: file_queue_error_handler,? ? ? ? file_dialog_complete_handler: file_dialog_complete_handler,? ? ? ? upload_progress_handler: upload_progress_handler,? ? ? ? upload_error_handler: upload_error_handler,? ? ? ? upload_success_handler: upload_success_handler,? ? ? ? upload_complete_handler: upload_complete_handler,? ? ? ? // 按钮设置
? ? ? ? button_placeholder_id: buttonId,? ? ? ? button_width: button_width,? ? ? ? button_height: button_height,? ? ? ? button_cursor: SWFUpload.CURSOR.HAND,? ? ? ? button_window_mode: "transparent",? ? ? ? button_text_top_padding: 0,? ? ? ? button_text_left_padding: 0,? ? ? ? // Flash设置，下面三行必须有
? ? ? ? flash_url: "/swfupload/swfupload.swf",? ? ? ? //跨域
? ? ? ? prevent_swf_caching: false,? ? ? ? preserve_relative_urls: false,? ? ? ? // 是否开启调试，true是，false否
? ? ? ? debug: false
? ? });
}

使用时：

var swfu;
$(function () {
    var myswfsetting = {
        buttonId: "spanButtonPlaceholder1"
    };
    InitMySwf(myswfsetting,swfu);
    //myswfbox 
});

本方法中用了artdialog的弹窗，因此调用时，请保证在本脚本前引用了artdialog

顺便粘一下后台处理的代码：

ajaxMsgModel rm = new ajaxMsgModel { err = 1,msg = "非法提交" };
            string ac = context.Request["ac"];
            if (ac == "upload")
            {
                try
                {
                    HttpPostedFile pfile = context.Request.Files["Filedata"];
                    if (pfile == null)
                    {
                        return;
                    }
                    string fileformat = pfile.FileName.Substring(pfile.FileName.LastIndexOf(".")).ToLower() ;
                    string fileflx = ",.zip,.rar,.doc,.docx,.xls,.xlsx,";
                    if (!fileflx.Contains(fileformat))
                    {
                        return;
                    }
                    
                    DateTime dtime = DateTime.Now;
                    string filename = string.Format("{0:yyyyMMddHHmmss}",dtime) + fileformat;
                    string folder = context.Server.MapPath("/upload/");
                    if (!Directory.Exists(folder))
                    {
                        IOHelper.CreateFoder(folder);
                    }
                    
                    string filepath = folder + filename;
                    //保存文件
                    pfile.SaveAs(filepath);
                    rm = new ajaxMsgModel { err = 0,msg = filename,data="/upload/"+filename };
                    return;
                }
                catch (Exception ex)
                {
                    rm = new ajaxMsgModel { err = 1,msg = ex.Message };
                }
                finally
                {
                    string msg = OutputHelper.GetJsonMsg(rm);
                    context.Response.Write(msg);
                }