function upload_xz(imgfile) {
    ajaxLoading();
    debugger;
    var allFile = imgfile.files;
    var imageArr = [];
    var k = 0;
    for (var i = 0; i < allFile.length; i++) {
        
        var file = allFile[i];
        //添加一层过滤
        var rFilter = /^(image\/bmp|image\/gif|image\/jpeg|image\/png|image\/tiff)$/i;
        if (!rFilter.test(file.type)) {
            alert("文件格式必须为图片");
            return;
        }
        var reader = new FileReader();
        reader.readAsDataURL(file); //用文件加载器加载文件
        reader.onload = function (event) {
            alert(event.target.result);
            var imgdata = event.target.result;
            // 传入后台保存为图片
            $.ajax({
                type: "post",
                url: "../huanjing/HJHelp.ashx",
                data: { "action": "uploadimg", "imgdata": imgdata, "imgpath": moreimgpath },
                error: function (ex) {
                    console.log("保存第" + (k + 1) + "张图片失败");
                    k++;
                },
                success: function (data) {
                    if (data != "-1") {
                        if (k < allFile.length + 1) {
                            debugger;
                            //返回的地址记录到span上
                            var filepaths = $("#upload_name_xz").text();
                            if (filepaths != "") {
                                $("#upload_name_xz").text(filepaths + "," + data);
                            } else {
                                $("#upload_name_xz").text(data);
                            }

                            console.log("保存第" + (k + 1) + "张图片成功");
                            $("#xzpic_count").text("【" + (k + 1) + "】");
                            k++;
                        }
                        if (k == allFile.length) {
                            console.log("图片上传完成");
                            $("#xzpic_count").text("【上传完成】");
                            
                        }
                    } else {
                        alert("请检查或更换第" + (k+1) + "张图片");
                        $("#xzpic_count").text("【上传失败】");
                    }

                    ajaxLoadEnd();
                }
            });
        };
       
    }
}

 public void SaveIMG(HttpContext context)
        {
            string imgpath = context.Request["imgpath"];
            string base64 = context.Request["imgdata"];
            //判断图片类型
            String[] IMGArr = base64.Split(‘;‘);
            string type = IMGArr[0].Split(‘/‘)[1];

            //保存图片
            string imgstr = base64.Split(‘,‘)[1];//纯净的图片数据
            //System.Drawing.Bitmap bitmap = null;//定义一个Bitmap对象，接收转换完成的图片
            try
            {
                byte[] arr = Convert.FromBase64String(imgstr);//将纯净资源Base64转换成等效的8位无符号整形数组

                System.IO.MemoryStream ms = new System.IO.MemoryStream(arr);//转换成无法调整大小的MemoryStream对象
                System.Drawing.Bitmap bmp = new System.Drawing.Bitmap(ms);//将MemoryStream对象转换成Bitmap对象
                ms.Close();//关闭当前流，并释放所有与之关联的资源


                int width = bmp.Width;
                int height = bmp.Height;
                using (System.Drawing.Bitmap bitmap = new System.Drawing.Bitmap(bmp, width, height))
                {

                    string savepath = context.Server.MapPath(imgpath) + DateTime.Now.ToString("yyyyMMdd");
                    if (!System.IO.Directory.Exists(savepath))
                    {
                        System.IO.Directory.CreateDirectory(savepath);
                    }
                    string filename = DateTime.Now.ToString("yyyyMMddHHmmss_ffff");

                    bitmap.Save(savepath + "\\" + filename + "." + type);


                    context.Response.Write("/UploadFile/MoreImg/" + DateTime.Now.ToString("yyyyMMdd") + "/" + filename + "." + type);

                }
                
            }
            catch (Exception ex)
            {
                context.Response.Write("-1");
            }
        }