Question

我关注了this tutorial，以便将DropZone包含在传统表单元素中：

HTML

<form id="my-awesome-dropzone" class="dropzone">
  <div class="dropzone-previews"></div> <!-- this is were the previews should be shown. -->

  <!-- Now setup your input fields -->
  <input type="email" name="username" />
  <input type="password" name="password" />

  <button type="submit">Submit data and files!</button>
</form>

和JS在这里

Dropzone.options.myAwesomeDropzone = { // The camelized version of the ID of the form element

  // The configuration we've talked about above
  autoProcessQueue: false,
  uploadMultiple: true,
  parallelUploads: 100,
  maxFiles: 100,

  // The setting up of the dropzone
  init: function() {
    var myDropzone = this;

    // First change the button to actually tell Dropzone to process the queue.
    this.element.querySelector("button[type=submit]").addEventListener("click", function(e) {
      // Make sure that the form isn't actually being sent.
      e.preventDefault();
      e.stopPropagation();
      myDropzone.processQueue();
    });

    // Listen to the sendingmultiple event. In this case, it's the sendingmultiple event instead
    // of the sending event because uploadMultiple is set to true.
    this.on("sendingmultiple", function() {
      // Gets triggered when the form is actually being sent.
      // Hide the success button or the complete form.
    });
    this.on("successmultiple", function(files, response) {
      // Gets triggered when the files have successfully been sent.
      // Redirect user or notify of success.
    });
    this.on("errormultiple", function(files, response) {
      // Gets triggered when there was an error sending the files.
      // Maybe show form again, and notify user of error
    });
  }

}

除非用户没有提交文件，否则效果很好。根据{{3}}，我必须进行一些修改：

替换简单的

myDropzone.processQueue();

通过

var form = $(this).closest('#dropzone-form');
                    if (form.valid() == true) { 
                        if (myDropzone.getQueuedFiles().length > 0) {                        
                            myDropzone.processQueue();  
                        } else {                       
                            myDropzone.uploadFiles([]); //send empty 
                        }                                    
                    }

现在，正如它在stackoverflow帖子＆＃34; DropZonejs：提交没有文件的表格＆＃34;评论，我明白了

Uncaught TypeError: Cannot read property 'status' of undefined

所以我检查了通过替换dropzone.js的一些内容来修复此问题的this post。这一行

ata.append(this._getParamName(i), files[i], files[i].name);

到那些行

if ( typeof files[i] != "undefined" ) {
  formData.append(this._getParamName(i), files[i], files[i].name);
} else {
  formData.append(this._getParamName(i), "");
}

现在它正在工作（在模型中使用正确的数据调用Controller）但是所做的调用是一个AJAX调用，我想在我的应用程序的控制器中进行重定向，所以它没有#t工作。我可以创建一个带有一个URL的Json作为返回但我必须将重定向保留在后端。

控制器示例：

[HttpPost]
        public ActionResult Create(CustomViewModel model)
        {
            // Here I get Request.IsAjaxRequest() = true when form is submitted
            if (ModelState.IsValid)
            {
                var container = DoSomething();
                if (container.HasErrors)
                {
                    SetError(container.ErrorMessage);
                    return RedirectToAction("Index");
                }
            }
            else
            {
                SetAlert("ErrorMessage");
            }
            return RedirectToAction("Index");
        }

我该如何解决这个问题？在此先感谢您的帮助

Answer 1

我遇到了同样的问题，没有太多时间来解决它。只需要尽快使它工作......

这是我的2美分;

您可以从控制器返回类似的内容;

return Json(new { ErrorMessage = "", RedirectURL = Url.Action("Get", null, new { id = result.Value.id }, Request.Url.Scheme ) });

并从您发布的JS中填写此方法：

this.on("successmultiple", function (files, response) {
                // Gets triggered when the files have successfully been sent.
                // Redirect the user or notify of success.
                var errorMessage = response.ErrorMessage;
                if (errorMessage.length > 0) {
                    alert(errorMessage);
                }
                else {
                    window.location.replace(response.RedirectURL);
                }
};

Answer 2

Dropzone使用AJAX上传文件，这意味着页面本身永远不会更改，您无法使用服务器端重定向来更改页面。您唯一的选择是：

返回带有URL的JSON对象，并在客户端重定向。

或

执行表单的正常回发而不是AJAX上传。为此你必须停止使用Dropzone。

发布带有dropzone的正常形式

2 个答案: