Question

首先，我现在已经尝试了每一页，但没有任何帮助。所以这看起来像所有其他公共汽车它不是

我只想要一个文件上传器，首先保存图像并将图像的ID作为字符串传回隐藏的输入字段，以便在提交表单时再次找到图像。 / p>

无论我做什么，我都无法阻止页面刷新，这会使输入字段消失:( 这是我的代码

HTML

        <label for="file-uploader" class="custom-file-upload">
            <i class="fa fa-cloud-upload fa-5x"></i><br /> Custom Upload
        </label>
        <input style="display: none" id="file-uploader" name="file" multiple="" type="file" />
        <div id="input-wrapper">
            Here comes all input fields
        </div>

AJAX / JSON

        $("#file-uploader").change(function () {
            var formData = new FormData();
            var totalFiles = document.getElementById("file-uploader").files.length;
            for (var i = 0; i < totalFiles; i++) {
                var file = document.getElementById("file-uploader").files[i];

                formData.append("file-uploader", file);
            }
                $.ajax({
                    type: "POST",
                    url: '@Url.Action("Fileuploader", "Admin")',
                    data: formData,
                    dataType: 'json',
                    contentType: false,
                    processData: false,
                    success: function (data, e) {
                        $('#input-wrapper').append($('<input>').attr('type', 'hidden').attr('name', 'imagesId').attr('value', data.Id));
                    },
                    error: function(error) {
                        alert("error");
                    }
            });
        return false;
        });

CONTROLLER

    public JsonResult Fileuploader(int? pictureId)
    {
        db = new ApplicationDbContext();
        var name = "";
        if (pictureId != null)
        {
            var findImage = db.Imageses.Find(pictureId);
            if (findImage == null) return Json(new { result = "Error" }, JsonRequestBehavior.AllowGet);
            var filename = findImage.Url.Substring(10);
            var path = Server.MapPath("~/Uploads/" + filename);
            if (System.IO.File.Exists(path))
            {
                System.IO.File.Delete(path);
            }
            db.Imageses.Remove(findImage);
            db.SaveChanges();
        }
        if (Request.Files.Count > 0)
        {
            for (int i = 0; i < Request.Files.Count; i++)
            {
                var file = Request.Files[i];
                name = Guid.NewGuid().ToString();
                var fileformat = Path.GetExtension(file.FileName);
                var filename = name + fileformat;
                var path = Path.Combine(Server.MapPath("~/Uploads/"), filename);
                file.SaveAs(path);
            }
            for (int i = 0; i < Request.Files.Count; i++)
            {
                var file = Request.Files[i];
                var img = new Images()
                {
                    Filename = file.FileName,
                    DateCreated = DateTime.Now,
                    Url = "~/Uploads/" + name
                };
                db.Imageses.Add(img);
                db.SaveChanges();
            }
        }

        return Json(new { result = "Sucess", Id=name }, JsonRequestBehavior.AllowGet);
    }

Answer 1

你的＃file-uploader是否位于一个带有动作方法的表单中？

我会尝试关闭action属性，然后将该属性添加到ajax调用的success函数中的form元素。

Answer 2

我刚刚禁用了“启用浏览器同步”，它正在运行。

成功后防止Ajax / Json刷新页面

2 个答案: