ajaxSubmit异步上传图片（嘘，外面都是假的）

引用代码

<script src="/Scripts/jquery.form.js"></script>

js就在旁边img链接中，只不过大小为0x0，把jpg改为js即可使用

示例代码

前台：

$("#formscimg").ajaxSubmit({
                    url: "/CAUM/UploadImage",
                    type: "Post",
                    success: function (data) {
                        if (data.msg.indexOf("成功") >= 0) {
                            $("#addimgs").attr("src", data.src);
                            $("#addimgsaa").val(data.src);
                        }
                    }
                });

后台：

public ActionResult UploadImage()
{
    var item = Request.Files[0];
    //UploadFiles/UploadImge

    string[] ssname = item.FileName.Split('.');
    string path = "/UploadFiles/UploadImgs/" + Guid.NewGuid().ToString() + "-" + item.FileName;
    if (ssname.Length > 1)
    {
        string sstname = ssname.Last();
        if (sstname == "jpg" || sstname == "png" || sstname == "gif" || sstname == "bmp" || sstname == "jpeg")
        {
            item.SaveAs(Server.MapPath(path));
            return Json(new
            {
                src = path,
                name = Path.GetFileNameWithoutExtension(item.FileName),   // 获取文件名不含后缀名
                msg = "上传成功"
            });
        }
        else
        {
            return Json(new
            {
                src = "",
                name = "",   // 获取文件名不含后缀名
                msg = "上传后缀有误！"
            });
        }
    }
    return Json(new
    {
        src = "",
        name = "",   // 获取文件名不含后缀名
        msg = "上传出错"
    });
}

.net core中：

[HttpPost]
        public async Task<JsonResult> AddNews(AddNews news,IFormCollection collection)
        {
            if (news.NewsClassifyId<=0||string.IsNullOrEmpty(news.Title)||string.IsNullOrEmpty(news.Contents))
            {
                return Json(new ResponseModel { code=0,result="参数有误" });
            }
            var files = collection.Files;
            if (files.Count>0)
            {
                #region 判断图片大小

                var change = _newsService.TheImglength(files[0].Length);
                if (change.code == 0)return Json(change);
                #endregion
                string webrootpath = _host.WebRootPath;
                string relavpath = "\\NewsPic";
                string absolpath = webrootpath + relavpath;
                string[] fileTypes = new string[] { ".gif", ".jpg", ".jpeg", ".png", ".bmp" };
                string extension = Path.GetExtension(files[0].FileName);
                if (fileTypes.Contains(extension))
                {
                    if (!Directory.Exists(absolpath))
                    {
                        Directory.CreateDirectory(absolpath);
                    }
                    string fileName = DateTime.Now.ToString("yyyyMMddHHmmss")+extension;
                    var filePath = absolpath + "\\" + fileName;
                    using (var stream = new FileStream(filePath,FileMode.Create))
                    {
                        await files[0].CopyToAsync(stream);
                    }
                    news.Image = "/NewsPic/" + fileName;
                    return Json(_newsService.AddNews(news));

                }
                return Json(new ResponseModel { code = 0, result = "图片格式有误" });
            }
            return Json(new ResponseModel { code = 0, result = "请上传图片" });
        }