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75 lines
3.5 KiB
75 lines
3.5 KiB
8 years ago
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---
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category: Components
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type: Form Controls
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english: Upload
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---
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Upload file by selecting or dragging
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## When to use
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Uploading is the process of publishing information (web pages, text, pictures, video, etc.) to a remote server via a web page or upload tool.
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- When you need to upload one or more files.
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- When you need to show the process of uploading.
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- When you need to upload files by dragging and dropping.
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## API
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| Property | Description | Type | Default|
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|------------|----------------------------------------------------| ----------- |--------|
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| name | Optional. The name of uploading file | String | file |
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| defaultFileList | Optional. Default list of files that have been uploaded. | Array[Object] | - |
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| fileList | Optional. List of files that have been uploaded. | Array[Object] | - |
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| action | Required. Uploading URL | String | - |
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| data | Optional. Uploading params or function which can return uploading params. | Object or function(file) | - |
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| headers | Optional. Set request headers, valid above IE10. | Object | - |
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| showUploadList | Optional. Whether to show uploadList. | Boolean | true |
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| multiple | Optional. Whether to support selected multiple file. `IE10+` supported. You can select multiple files with CTRL holding down while multiple is set to be true | Boolean | false |
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| accept | Optional. File types that can be accepted. See [input accept Attribute](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input#attr-accept) | String | - |
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| beforeUpload | Optional. Hook function which takes an argument: the uploaded file, will be executed before uploading. Uploading will be stopped with `false` or a rejected Promise returned. **Warning：this function is not supported by old IE**。 | Function | - |
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| onChange | Optional. A callback function, can be executed when uploading state is changing. See [onChange](#onChange) | Function | - |
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| listType | Optional. Built-in stylesheets, support for two types: `text` or `picture` | String | 'text'|
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| onPreview | A callback function, will be executed when file link is clicked. | Function(file) | - |
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| onRemove | A callback function, will be executed when removing file button is clicked | Function(file) | - |
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| supportServerRender | Need to be turned on while the server side is rendering.| Boolean | false |
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### onChange
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> The function will be called when uploading is in progress, completed or failed
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When uploading state change, it returns:
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```js
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{
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file: { /* ... */ },
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fileList: [ /* ... */ ],
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event: { /* ... */ },
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}
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```
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1. `file` File object for the current operation.
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```js
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{
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uid: 'uid', // unique identifier，negative is recommend，to prevent interference with internal generated id
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name: 'xx.png' // file name
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status: 'done', // options：uploading, done, error, removed
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response: '{"status": "success"}', // response from server
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}
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```
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If multiple files are uploaded, this parameter will be Array Object `[file, ...]`
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2. `fileList` current list of files
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3. `event` response from server, including uploading progress, supported by advanced browsers.
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## show download links
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please set property `url` of property `fileList` to control content of link
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## IE note
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- [https://github.com/react-component/upload#ie89-note](https://github.com/react-component/upload#ie89-note)
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