1# 上传文件 2 3 4Web组件支持前端页面选择文件上传功能,应用开发者可以使用[onShowFileSelector()](../reference/apis-arkweb/ts-basic-components-web.md#onshowfileselector9)接口来处理前端页面文件上传的请求,如果应用开发者不做任何处理,Web会提供默认行为来处理前端页面文件上传的请求。 5 6 7下面的示例中,当用户在前端页面点击文件上传按钮,应用侧在[onShowFileSelector()](../reference/apis-arkweb/ts-basic-components-web.md#onshowfileselector9)接口中收到文件上传请求,在此接口中开发者将上传的本地文件路径设置给前端页面。 8 9 10- 应用侧代码。 11 12 ```ts 13 // xxx.ets 14 import { webview } from '@kit.ArkWeb'; 15 import { BusinessError } from '@kit.BasicServicesKit'; 16 import { picker } from '@kit.CoreFileKit'; 17 18 @Entry 19 @Component 20 struct WebComponent { 21 controller: webview.WebviewController = new webview.WebviewController(); 22 23 build() { 24 Column() { 25 Web({ src: $rawfile('local.html'), controller: this.controller }) 26 .onShowFileSelector((event) => { 27 console.log('MyFileUploader onShowFileSelector invoked'); 28 const documentSelectOptions = new picker.DocumentSelectOptions(); 29 let uri: string | null = null; 30 const documentViewPicker = new picker.DocumentViewPicker(); 31 documentViewPicker.select(documentSelectOptions).then((documentSelectResult) => { 32 uri = documentSelectResult[0]; 33 console.info('documentViewPicker.select to file succeed and uri is:' + uri); 34 if (event) { 35 event.result.handleFileList([uri]); 36 } 37 }).catch((err: BusinessError) => { 38 console.error(`Invoke documentViewPicker.select failed, code is ${err.code}, message is ${err.message}`); 39 }) 40 return true; 41 }) 42 } 43 } 44 } 45 ``` 46 47 48- local.html页面代码。 49 50 ```html 51 <!DOCTYPE html> 52 <html> 53 <head> 54 <meta charset="utf-8"> 55 <title>Document</title> 56 </head> 57 58 <body> 59 <!-- 点击上传文件按钮 --> 60 <input type="file" value="file"></br> 61 <meta name="viewport" content="width=device-width" /> 62 </body> 63 </html> 64 ``` 65