Dropzone：防止addfile两次 [英] Dropzone: prevent addfile twice

问题描述

我正在使用dropzone将图片上传到图库。我是按钮提交的。是否可以防止两次添加同一文件？我不确定是否检查名称或名称和大小。这是我的代码：

I'm using dropzone to upload images to gallery. I'm submiting by button. Is it possible to prevent adding same file twice? I'm not really sure if checking name or name and size. Here's my code:

<script>
      var i = 0;
      Dropzone.options.myDropzone = {
        init: function() {
            this.on("addedfile", function(file) {
            i=++i;

检查其他文件的文件名和文件大小

check filenames and filesizes of other files here

----------->if(){
                myDropzone.removeFile(file);
            }


            var inputs = Dropzone.createElement('<div class="dz-image-metadata"><label for="'+i+'_title">Nazov</label><input type="hidden" name="'+i+'_filename" value="'+file.name+'"><input type="text" name="'+i+'_title" value="'+file.name+'" /><label for="">Popis</label><input type="text" name="'+i+'_desc"></div>');
            file.previewElement.appendChild(inputs);
            var removeButton = Dropzone.createElement("<button class=\"dz-button\">Vymazať</button>");
            var _this = this;
            removeButton.addEventListener("click", function(e) {
              e.preventDefault();
              e.stopPropagation();
              i=--i;
              _this.removeFile(file);
            });
            file.previewElement.appendChild(removeButton);
          });
          var myDropzone = this;
           $("#submit-all").click(function (e) {
            e.preventDefault();
            e.stopPropagation();
            myDropzone.processQueue();
            i=0;
        }
        );

         this.on("successmultiple", function(files, response) {
           console.log(response);
        });

         this.on("complete", function(file) {
            myDropzone.removeFile(file);
        });

        this.on("errormultiple", function(files, response) {
             });
        },
        autoProcessQueue: false,
        previewsContainer: ".dropzone",
        uploadMultiple: true,
        parallelUploads: 25,
        maxFiles: 25,
      };
    </script>

推荐答案

添加以下简单的代码行：

Add these simple lines of code:

myDropzone.on("addedfile", function(file) {
    if (this.files.length) {
        var _i, _len;
        for (_i = 0, _len = this.files.length; _i < _len - 1; _i++) // -1 to exclude current file
        {
            if(this.files[_i].name === file.name && this.files[_i].size === file.size && this.files[_i].lastModifiedDate.toString() === file.lastModifiedDate.toString())
            {
                this.removeFile(file);
            }
        }
    }
});

这篇关于Dropzone：防止addfile两次的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！