req.body.name未定义

本文介绍了req.body.name未定义的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

你好，我有一个要发送到服务器的表格，但是当它到达处理程序时.我尝试打印出内容，但正文未定义.请有人可以我做错了.

Hello i have a form that i am sending to the server but when it reaches the handler. I try to print out the contents but the body is undefined. Please could someone what i did wrong.

<form action="/myactive" method="POST"> <input type="radio" name="gender" value="Male"> Male<br> <input type="radio" name="gender" value="Female"> Female <button type="submit" class="btn btn-primary btn-md">Medium</button> </form>

在我的服务器端下方是:

and below my server side is:

var express = require('express'); var app = express(); var bodyparser = require('body-parser'); app.set('port', process.env.PORT || 3030); app.use(bodyparser.urlencoded({ extended: false })); app.use(express.static(__dirname + '/public')); app.get('/', function(req, res) { console.log('Index page'); }); app.post('/myaction', function(req, res){ console.log('Name: '+req.body.name); //returns undefined res.end("Welcome"); }); app.listen(app.get('port'), function(){ console.log('Listening on port '+app.get('port')); });

但是在控制台上它会打印

But on the console it prints

Name is undefined.

推荐答案

您需要在表单中指定与服务器中的发布路线相同的action.所以/myactive -> /myaction.此外，在req.body对象中没有name属性.当您在表单中指定name="gender"时，这意味着gender属性将附加到req.body对象

You need to specify the same action in your form with the post route that you have in the server. So /myactive -> /myaction. Moreover there is no name property in the req.body object. When you specify name="gender" in your form it means that the gender property will be attached to the req.body object

<form action="/myaction" method="POST"> <input type="radio" name="gender" value="Male"> Male<br> <input type="radio" name="gender" value="Female"> Female <button type="submit" class="btn btn-primary btn-md">Medium</button> </form>

您可以使用以下代码从路线中检索所选性别

And you can retrieve the selected gender from your route using below code

app.post("/myaction", function(request, response) { console.log("Gender is:", request.body.gender); response.sendStatus(200) });