MVC与DWZ整合中部分问题的解决

1、错误提示距离太远

2、正确与错误时返回JSON（即：如何不出现打开新页显示JSON字串）

3、打开新页后“数据加载中，请稍候”关不掉

4、如何正常的分页，同时如果有查询结果时分页也要有效

5、关闭弹出的对话框后出现半透明黑色框

6、DWZ使用<input type="file">上传文件返回JSON串IE无法解析问题

上传的页面的form中如果加上onsubmit = "return validateCallback(this, dialogAjaxDone)"是无法实现文件上传的，接收到的只能是null，所以需要换一种方式，即：

onsubmit="return iframeCallback(this,dialogAjaxDone);

[HttpPost]
        [Description("接收商户标题图片")]
        public string UploadTitle(HttpPostedFileBase upImg, string id)
        {
            int MaxSize = 597152;     // 最大上传大小，默认是0.5M
            string newFile = "";
            string ext = "";
            string fn = "";
            string tmp = "";
            try
            {
                //HttpFileCollectionBase fc = Request.Files;
                //HttpPostedFileBase f = Request.Files[0];
                if (upImg.ContentLength > MaxSize || upImg.ContentLength == 0)
                {
                    tmp = "{ "statusCode" : "200", " +
                               ""message" : "上传失败！文件大小不正确，必须是在0字节以上，0.5M字节以内"," +
                               ""navTabId" : ""," +
                               ""rel" : ""," +
                               ""callbackType" : "closeCurrent"," +
                               ""forwardUrl": """ +
                               "}";
                    return tmp;
                }
                if (!Directory.Exists(Server.MapPath("~/Upload")))
                    Directory.CreateDirectory(Server.MapPath("~/Upload"));
                ext = upImg.FileName.Substring(upImg.FileName.LastIndexOf("."));
                fn = DateTime.Now.ToString("yyyMMddHHmmssfff");
                newFile = Server.MapPath("~/Upload") + "\" + fn + ext;
                upImg.SaveAs(newFile);
                int dbid = Convert.ToInt32(id);
                var data = db.Seller.Where(p => p.id == dbid).FirstOrDefault();
                if (data != null)
                {
                    data.TitleJPG = "/Upload/" + fn + ext;
                    db.SaveChanges();
                }
                //AJAX不支持上传文件，所以用了隐藏iframe方式，但返回就不能是JSON格式，只能返回字符串格式
                tmp = "{ "statusCode" : "200", " +
                                ""message" : "修改成功"," +
                                ""navTabId" : "dlg_modiSeller"," +
                                ""rel" : ""," +
                                ""callbackType" : "closeCurrent"," +
                                ""forwardUrl": """+
                                "}";
                return tmp;
                
            }
            catch (Exception ex)
            {
                tmp = "{ "statusCode" : "200", " +
                               ""message" : "上传图片失败"," +
                               ""navTabId" : ""," +
                               ""rel" : ""," +
                               ""callbackType" : "closeCurrent"," +
                               ""forwardUrl": """ +
                               "}";
                return tmp;
            }

        }

<form action="@Url.Action("UploadTitle", "Seller", new { id = ViewData["id"].ToString() })" method="post" enctype="multipart/form-data" class="pageForm required-validate" onsubmit="return iframeCallback(this,dialogAjaxDone);" >
    <input type="file" name="upImg" id="upImg" style=" 180px" />
    <button type="submit">文件上传</button>
</form>

注意点：前台的input控件名与后台接收的一致，即(HttpPostedFileBase upImg, string id)中的upImg必须与前台的一致，否则接收不到文件