我们想将图像文件作为 multipart/form 发送到后端,我们尝试使用 html 表单获取文件并将文件作为 formData 发送,这里是代码 export default class Task extends React.Component { uploadAction() { var data = new FormData(); var imagedata = document.querySelector('input[type="file"]').files[0]; data.ap...
Why use FormData for File Uploading in React Native? When searching for file uploading examples in React Native, you will find many examples that use external third-party dependencies. However, I prefer to avoid them and find alternative solutions. One solution is to use FormData. The reason fo...
this.setState({ selectedFile: event.target.files[0] }); }; // On file upload (click the upload button) onFileUpload = () => { // Create an object of formData const formData = new FormData(); // Update the formData object formData.append( "myFile", this.state.selectedFile, this....
Upload File Control UsebeforeUploadto return false to control the list of uploaded files Append Extra Data Append an extraFormDatainstance to a file upload request. Please checkout the 'Network' tab in the developer tool. Upload method
A React component of async file uploading, using File API+FormData in modern browser, and form+iframe in IE9-. If want to use in IE8, use es5-shim or so. With help of ES6, so babel is required. When in IE9-, an invisible will be put over the chooseBtn so that it can catch...
Try to upload a file and you will get a network error and Failed to parse body as formdata. React Native Version 0.76.1 Affected Platforms Runtime - iOS, Runtime - Android Output ofnpx react-native info System: OS: macOS 15.1 CPU: (8) arm64 Apple M2 ...
formData.append(key, option.data[key]); }); } formData.append(option.filename, option.file); xhr.onerror = function error(e) { option.onError(e); }; xhr.onload = function onload() { // allow success when 2xx status // see https://github.com/react-component/upload/issues/34 ...
当用户选择一个文件时,我们将其存储为组件的状态(file)。之后,用户可以按下“上传”按钮,执行handleFileUpload函数。该函数将文件添加到FormData对象中,并使用XHR请求将其上传到服务器。在异步上传完成后,我们将file状态重置为null,以准备用户选择下一个文件。
formData.append(option.filename, option.file); } xhr.onerror=functionerror(e) { option.onError&& option.onError(e); }; xhr.onload=functiononload() {// allow success when 2xx status// see https://github.com/react-component/upload/issues/34if(xhr.status<200|| xhr.status>=300) {return...
import React, { useState, useEffect, useRef } from "react"; import { Button, Upload } from "antd"; import { UploadOutlined } from "@ant-design/icons"; export default function App() { const fileState = useRef(); const [uploadFiles, setUploadFiles] = useState([]); ...