Dropzone在上传时提交按钮

Question

我想在我的dropzone文件上传器上添加一个按钮上传.目前,在选择或拖动文件到dropzone区域后,它会直接上传文件.我想要做的是:1.选择或暂停要上传的文件.2.验证3.点击或按下上传按钮上传文件.

注意:只有在按下按钮上传后才会上传文件.

这是我的表格

<form id='frmTarget' name='dropzone' action='upload_files.php' class='dropzone'>
   <div class='fallback'>
      <input name='file' type='file' multiple />
   </div>
   <input id='refCampaignID' name='refCampaignID' type='hidden' value=\ "$rowCampaign->CampaignID\" />
</form>

这是我的JS

Dropzone.options.frmTarget = 
    {
            url: 'upload_files.php',
            paramName: 'file',
            clickable: true,
            maxFilesize: 5,
            uploadMultiple: true, 
            maxFiles: 2,
            addRemoveLinks: true,
            acceptedFiles: '.png,.jpg,.pdf',
            dictDefaultMessage: 'Upload your files here',
            success: function(file, response)
            {
                setTimeout(function() {
                    $('#insert_pic_div').hide();
                    $('#startEditingDiv').show();
                }, 2000);
            }
        };

这是我的php帖子请求

 foreach ($_FILES["file"] as $key => $arrDetail) 
   {
      foreach ($arrDetail as $index => $detail) {
         //print_rr($_FILES["file"][$key][$index]);
         $targetDir = "project_images/";
         $fileName = $_FILES["file"]['name'][$index];
         $targetFile = $targetDir.$fileName;

         if(move_uploaded_file($_FILES["file"]['tmp_name'][$index],$targetFile))
         {
            $db = new ZoriDatabase("tblTarget", $_REQUEST["TargetID"], null, 0);
            $db->Fields["refCampaignID"] = $_REQUEST["refCampaignID"];
            $db->Fields["strPicture"] = $fileName;
            $db->Fields["blnActive"] = 1;
            $db->Fields["strLastUser"] = $_SESSION[USER]->USERNAME;
            $result = $db->Save();

            if($result->Error == 1){
               return "Details not saved.";
            }else{
               return "Details saved.";
            }
         }else{
            return "File not uploaded.";
         }
      }
   }

Answer 1

你需要:

1. 添加一个按钮:

   <button type="submit" id="button" class="btn btn-primary">Submit</button>
   

2. 删除时,告诉Dropzone 不要自动上传文件,因为默认情况下会这样.这是使用config选项完成的autoProcessQueue:

   autoProcessQueue: false
   

3. 由于Dropzone现在不会自动上传文件,因此您需要在单击按钮时手动指示它执行此操作.所以你需要一个事件处理程序来点击该按钮,告诉Dropzone进行上传:

   $("#button").click(function (e) {
       e.preventDefault();
       myDropzone.processQueue();
   });
   

4. 这只是POST上传的文件,没有任何其他输入字段.您可能希望发布所有字段,例如您refCampaignID的CSRF令牌,如果您有,等等.为此,您需要在发送之前将它们复制到POST中.Dropzone有一个sending事件,在每个文件发送之前调用,您可以在其中添加回调:

   this.on('sending', function(file, xhr, formData) {
       // Append all form inputs to the formData Dropzone will POST
       var data = $('form').serializeArray();
       $.each(data, function(key, el) {
           formData.append(el.name, el.value);
       });
   });
   

把它们放在一起:

Dropzone.options.frmTarget = {
    autoProcessQueue: false,
    url: 'upload_files.php',
    init: function () {

        var myDropzone = this;

        // Update selector to match your button
        $("#button").click(function (e) {
            e.preventDefault();
            myDropzone.processQueue();
        });

        this.on('sending', function(file, xhr, formData) {
            // Append all form inputs to the formData Dropzone will POST
            var data = $('#frmTarget').serializeArray();
            $.each(data, function(key, el) {
                formData.append(el.name, el.value);
            });
        });
    }
}

Answer 2

以为我也会添加一个纯香草 JS 解决方案，没有 jQuery。

/* 'dropform' is a camelized version of your dropzone form's ID */
      Dropzone.options.dropform = {
        /* Add all your configuration here */
        autoProcessQueue: false,

        init: function()
        {
          let myDropzone = this;
          /* 'submit-dropzone-btn' is the ID of the form submit button */
          document.getElementById('submit-dropzone-btn').addEventListener("click", function (e) {
              e.preventDefault();
              myDropzone.processQueue();
          });

          this.on('sending', function(file, xhr, formData) 
          {
            /* OPTION 1 (not recommended): Construct key/value pairs from inputs in the form to be sent off via new FormData
               'dropform' is the ID of your dropzone form
               This method still works, but it's submitting a new form instance.  */
              formData = new FormData(document.getElementById('dropform'));

             /* OPTION 2: Append inputs to FormData */
              formData.append("input-name", document.getElementById('input-id').value);
          });
        }
      };

注意：设置事件侦听器（例如sending我们在这里所做的）应该放在init函数中。如果您要将它们放在其他地方，例如：

init: function() 
{
    //...
},
sending: function(file, xhr, formData) 
{
  //... logic before each file send
}

这将覆盖为sending事件侦听器提供的默认逻辑 dropzone ，并可能导致意外的副作用。只有当您知道自己在做什么时，才应该这样做。