问题描述
当我需要让电子读取本地文件时,我有一个电子项目.
I have an electron project when I need to get electron to read a local file.
现在我拥有的是这个,它加载并显示 html 文件的内容.
Right now what I have is this, where it loads and displays the contents of a html file.
我现在只需要它来读取文件并将其存储在变量中.
I just need it to read a file and store it on a variable for now.
这是我当前的 main.js:
Here is my current main.js:
const {app, BrowserWindow } = require('electron'); const path = require('path'); const url = require('url'); var fs = require('fs'); let mainWindow; function createNewWindow() { mainWindow = new BrowserWindow({ width: 1300, height: 1000, minWidth: 600, minHeight: 400, title: 'Test App' }) } function loadInitialUrl() { mainWindow.loadURL(url.format({ pathname: path.join(__dirname, 'index.html'), protocol: 'file:', slashes: true })) } function closeApplication() { mainWindow.on('closed', () => { mainWindow = null; }) } app.on('ready', function(){ createNewWindow(); loadInitialUrl(); mainWindow.setMenu(null); mainWindow.openDevTools(); fs.readFile('./README.md', 'utf8', function (err,data) { if (err) { return console.log(err); } console.log(data); }); mainWindow.on('closed', function() {mainWindow = null;}); });
我该怎么做,因为它没有在 console.log 中显示 README.md 文件的内容
How can I do this as it's not showing the contents of the README.md file in the console.log
推荐答案
基本上你需要做以下几件事.
Basically you need to do the following things.
1.加载所需的依赖项
var remote = require('remote'); // Load remote compnent that contains the dialog dependency var dialog = remote.require('dialog'); // Load the dialogs component of the OS var fs = require('fs'); // Load the File System to execute our common tasks (CRUD)
2.读取文件内容
dialog.showOpenDialog((fileNames) => { // fileNames is an array that contains all the selected if(fileNames === undefined){ console.log("No file selected"); return; } fs.readFile(filepath, 'utf-8', (err, data) => { if(err){ alert("An error ocurred reading the file :" + err.message); return; } // Change how to handle the file content console.log("The file content is : " + data); }); });
3.更新现有文件内容
var filepath = "C:/Previous-filepath/existinfile.txt";// you need to save the filepath when you open the file to update without use the filechooser dialog againg var content = "This is the new content of the file"; fs.writeFile(filepath, content, (err) => { if (err) { alert("An error ocurred updating the file" + err.message); console.log(err); return; } alert("The file has been succesfully saved"); });
更多阅读请访问 这里 :) 谢谢..
For more read please visit here :) Thanks..
还有一件事要添加..请检查您的文件路径是否正确.你可以做类似下面的事情.
One more thing to add..Please check that your path to file is correct. You could do something similar to below.
var path = require('path'); var p = path.join(__dirname, '.', 'README.md');