element upload上传 Element-React Upload 上传

通过点击或者拖拽上传文件

点击上传

通过 tip属性 你可以传入自定义的上传按钮类型和文字提示。

render() {
  const fileList = [
    {name: "food.jpeg", url: "https://fuss10.elemecdn.com/3/63/4e7f3a15429bfda99bce42a18cdd1jpeg.jpeg"}, {name: "food2.jpeg", url: "https://fuss10.elemecdn.com/3/63/4e7f3a15429bfda99bce42a18cdd1jpeg.jpeg"}
  ];
  return (
    <Upload
      className="upload-demo"
      action="//jsonplaceholder.typicode.com/posts/"
      onPreview={file => this.handlePreview(file)}
      onRemove={(file, fileList) => this.handleRemove(file, fileList)}
      fileList={fileList}
      limit={3}
      onExceed={(files, fileList) => {
        Message.warning(`当前限制选择 3 个文件，本次选择了 ${files.length} 个文件，共选择了 ${files.length + fileList.length} 个文件`);
      }}
      tip={<div className="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>}
    >
      <Button size="small" type="primary">点击上传</Button>
    </Upload>
  )
}


handlePreview(file) {
  console.log("preview");
}


handleRemove(file, fileList) {
  console.log("remove");
}

用户头像上传

使用 beforeUpload 限制用户上传的图片格式和大小。

constructor(props) {
  super(props);


  this.state = {
    imageUrl: "",
  };
}


render() {
  const { imageUrl } = this.state;
  return (
    <Upload
      className="avatar-uploader"
      action="//jsonplaceholder.typicode.com/posts/"
      showFileList={false}
      onSuccess={(res, file) => this.handleAvatarScucess(res, file)}
      beforeUpload={file => this.beforeAvatarUpload(file)}
    >
      { imageUrl ? <img src={imageUrl} className="avatar" /> : <i className="el-icon-plus avatar-uploader-icon"></i> }
    </Upload>
  )
}


handleAvatarScucess(res, file) {
  this.setState({ imageUrl: URL.createObjectURL(file.raw) });
}


beforeAvatarUpload(file) {
  const isJPG = file.type === "image/jpeg";
  const isLt2M = file.size / 1024 / 1024 < 2;


  if (!isJPG) {
    Message("上传头像图片只能是 JPG 格式!");
  }
  if (!isLt2M) {
    Message("上传头像图片大小不能超过 2MB!");
  }
  return isJPG && isLt2M;
}

照片墙

使用 listType 属性来设置文件列表的样式。

constructor(props) {
  super(props);


  this.state = {
    dialogImageUrl: "",
    dialogVisible: false,
  };
}


render() {
  const { dialogImageUrl, dialogVisible } = this.state;
  return (
    <div>
      <Upload
        action="//jsonplaceholder.typicode.com/posts/"
        listType="picture-card"
        onPreview={file => this.handlePictureCardPreview(file)}
        onRemove={(file, fileList) => this.handleRemove(file, fileList)}
      >
        <i className="el-icon-plus"></i>
      </Upload>
      <Dialog
        visible={dialogVisible}
        size="tiny"
        onCancel={() => this.setState({ dialogVisible: false })}
      >
        <img width="100%" src={dialogImageUrl} alt="" />
      </Dialog>
    </div>
  )
}


handleRemove(file, fileList) {
  console.log(file, fileList);
}


handlePictureCardPreview(file) {
  this.setState({
    dialogImageUrl: file.url,
    dialogVisible: true,
  })
}

图片列表缩略图

render() {
  const fileList2 = [
    {name: "food.jpeg", url: "https://fuss10.elemecdn.com/3/63/4e7f3a15429bfda99bce42a18cdd1jpeg.jpeg"}, {name: "food2.jpeg", url: "https://fuss10.elemecdn.com/3/63/4e7f3a15429bfda99bce42a18cdd1jpeg.jpeg"}
  ]
  return (
    <Upload
      className="upload-demo"
      action="//jsonplaceholder.typicode.com/posts/"
      onPreview={file => this.handlePreview(file)}
      onRemove={(file, fileList) => this.handleRemove(file, fileList)}
      fileList={fileList2}
      listType="picture"
      tip={<div className="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>}
    >
      <Button size="small" type="primary">点击上传</Button>
    </Upload>
  )
}


handleRemove(file, fileList) {
  console.log(file, fileList);
}


handlePreview(file) {
  console.log(file);
}

上传文件列表控制

通过 onChange 钩子函数来对列表进行控制

constructor(props) {
  super(props);


  this.state = {
    fileList: [{
      name: "food.jpeg",
      url: "https://fuss10.elemecdn.com/3/63/4e7f3a15429bfda99bce42a18cdd1jpeg.jpeg",
      status: "finished"
    }, {
      name: "food2.jpeg",
      url: "https://fuss10.elemecdn.com/3/63/4e7f3a15429bfda99bce42a18cdd1jpeg.jpeg",
      status: "finished"
    }]
  };
}


render() {
  const { fileList } = this.state;
  return (
    <Upload
      className="upload-demo"
      action="//jsonplaceholder.typicode.com/posts/"
      onChange={(file, fileList) => this.handleChange(file, fileList)}
      fileList={fileList}
      tip={<div className="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>}
    >
      <Button size="small" type="primary">点击上传</Button>
    </Upload>
  )
}


handleChange(file, fileList) {
  this.setState({ fileList: fileList.slice(-3) });
}

拖拽上传

可将文件拖入指定区域进行上传。

通过 drag 属性可以将上传控件变为支持拖拽的形式，并且你可以通过 multiple 属性来控制是否支持多选，onPreview 和 onRemove 是一个钩子函数，分别在点击上传后的文件链接和点击移除上传后的文件后被调用。

render() {
  return (
    <Upload
      className="upload-demo"
      drag
      action="//jsonplaceholder.typicode.com/posts/"
      multiple
      tip={<div className="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>}
    >
      <i className="el-icon-upload"></i>
      <div className="el-upload__text">将文件拖到此处，或<em>点击上传</em></div>
    </Upload>
  )
}

手动上传

render() {
  const fileList = [
    {name: "food.jpeg", url: "https://fuss10.elemecdn.com/3/63/4e7f3a15429bfda99bce42a18cdd1jpeg.jpeg"}, {name: "food2.jpeg", url: "https://fuss10.elemecdn.com/3/63/4e7f3a15429bfda99bce42a18cdd1jpeg.jpeg"}
  ];
  return (
    <Upload
      className="upload-demo"
      ref="upload"
      action="//jsonplaceholder.typicode.com/posts/"
      onPreview={file => this.handlePreview(file)}
      onRemove={(file, fileList) => this.handleRemove(file, fileList)}
      fileList={fileList}
      autoUpload={false}
      tip={<div className="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>}
      trigger={<Button size="small" type="primary">选取文件</Button>}
    >
      <Button style={{ marginLeft: "10px"}} size="small" type="success" onClick={() => this.submitUpload()}>上传到服务器</Button>
    </Upload>
  )
}


handleRemove(file, fileList) {
  console.log(file, fileList);
}


handlePreview(file) {
  console.log(file);
}


submitUpload() {
  this.refs.upload.submit();
}

Upload Attribute

Methods