By encoding your files and images from your forms to Base64 you can change all files needed for the upload to Base64 format before the submit. This can be done via the onFinish property of the <Form> component that comes with Ant Design

Example

Now let's make a small example to see how its done. In this example, the file we are going to be uploading files in Base64 type is going to be called avatar

pages/users/create.tsx

import {
  file2Base64,
} from '@pankod/refine-core'

import {
  Create,
  Form,
  Upload,
  Input,
  useForm,
  getValueFromEvent,
} from '@pankod/refine-antd'

export const UserCreate: React.FC = () => {
  const { form, formProps, saveButtonProps } = useForm<IUser>()

  return (
    <Create saveButtonProps={saveButtonProps}>
      <Form
        {...formProps}
        layout="vertical"
        onFinish={async (values) => {
          const base64Files = []
          // @ts-ignore
          const { avatar } = values

          for (const file of avatar) {
            if (file.originFileObj) {
              const base64String = await file2Base64(file)

              base64Files.push({
                ...file,
                base64String,
              })
            } else {
              base64Files.push(file)
            }
          }

          return (
            formProps.onFinish &&
            formProps.onFinish({
              ...values,
              avatar: base64Files,
            })
          )
        }}
      >
        <Form.Item
          label="First Name"
          name="firstName"
          rules={[
            {
              required: true,
            },
          ]}
        >
          <Input />
        </Form.Item>
        <Form.Item label="Avatar">
          <Form.Item
            name="avatar"
            valuePropName="fileList"
            getValueFromEvent={getValueFromEvent}
            noStyle
            rules={[
              {
                required: true,
              },
            ]}
          >
            <Upload.Dragger
              listType="picture"
              multiple
              beforeUpload={() => false}
            >
              <p className="ant-upload-text">Drag & drop a file in this area</p>
            </Upload.Dragger>
          </Form.Item>
        </Form.Item>
      </Form>
    </Create>
  )
}

interface IUser {
  id: number
  firstName: string
  avatar: [
    {
      uid: string
      name: string
      url: string
      status: 'error' | 'success' | 'done' | 'uploading' | 'removed'
    },
  ]
}

You can change files to Base64 by using the file2Base64 function.

tip

An edit form can be made by using the <Edit> component instead of <Create> without changing the rest of the code.

Example

VIEW SOURCE CODE →

RUN IN YOUR LOCAL

npm create refine-app@latest -- --example upload-antd-multipart