electron node.js 实现文件拖动读取文件

css/styles.css

.for_file_drop {
    width: 100%;
    height: 100px;
    background-color: blueviolet;
}

index.html

<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8">
    
    <title>Hello World!</title>
    <link rel="stylesheet" href="css/styles.css" />
  </head>
  <body>
    <h1>Hello World!</h1>
    We are using Node.js <span id="node-version"></span>,
    Chromium <span id="chrome-version"></span>,
    and Electron <span id="electron-version"></span>.
   

    <div>
        <h1>Process information</h1>
        <button onclick="getProcessInfo()">查询系统信息</button>
        </div>
    
    <div class="for_file_drop" id="drag_test">
      <h2>文件拖动到此处</h2>
      <span></span>
    </div>
    <!-- You can also require other files to run in this process -->
    <script src="./renderer.js"></script>

   

  </body>
</html>

renderer.js

const fs = require("fs");

const dragWrapper = document.getElementById("drag_test");
dragWrapper.addEventListener("drop",(e)=>{
    e.preventDefault(); //阻止e的默认行为
    const files = e.dataTransfer.files;
    if (files && files.length>=1){
        const path = files[0].path;
        console.log("file:",path);
        const content = fs.readFileSync(path);
        console.log(content.toString());
    }
})
//这个事件也需要屏蔽
dragWrapper.addEventListener("dragover",(e)=>{
    e.preventDefault();
})
function getProcessInfo(){
    console.log("Cpu Usage:", process.getCPUUsage());
    console.log("env",process.env);
    console.log("arc",process.arch);
}

main.js

// Modules to control application life and create native browser window
const {app, BrowserWindow} = require(‘electron‘)
const path = require(‘path‘)

// Keep a global reference of the window object, if you don‘t, the window will
// be closed automatically when the JavaScript object is garbage collected.
let mainWindow

function createWindow () {
  // Create the browser window.
  mainWindow = new BrowserWindow({
    width: 800,
    height: 600,
    webPreferences: {
      preload: path.join(__dirname, ‘preload.js‘),
      nodeIntegration: true // 注入node模块
    }
  })

  // and load the index.html of the app.
  mainWindow.loadFile(‘index.html‘)

  // Open the DevTools.
  // mainWindow.webContents.openDevTools()

  // Emitted when the window is closed.
  mainWindow.on(‘closed‘, function () {
    // Dereference the window object, usually you would store windows
    // in an array if your app supports multi windows, this is the time
    // when you should delete the corresponding element.
    mainWindow = null
  })
}

// This method will be called when Electron has finished
// initialization and is ready to create browser windows.
// Some APIs can only be used after this event occurs.
app.on(‘ready‘, createWindow)

// Quit when all windows are closed.
app.on(‘window-all-closed‘, function () {
  // On macOS it is common for applications and their menu bar
  // to stay active until the user quits explicitly with Cmd + Q
  if (process.platform !== ‘darwin‘) app.quit()
})

app.on(‘activate‘, function () {
  // On macOS it‘s common to re-create a window in the app when the
  // dock icon is clicked and there are no other windows open.
  if (mainWindow === null) createWindow()
})

// In this file you can include the rest of your app‘s specific main process
// code. You can also put them in separate files and require them here.

其中的第16行是重点，否则使用process时会出现：process is not defined 的错误。

electron node.js 实现文件拖动读取文件

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