node.js express 表单内容传出

1.我在routes/index.js中添加了提取表单内容 exports.doSearch = function(req, res){
//console.log(req.params.doSearch);//输出index var namevalue = req.body.username;
console.log(namevalue);//输出表单post提交的login_name
res.send('great you are right for post method:' + namevalue);//显示页面文字信息
return namevalue; }; 2.我在另外一个文件search.js文件中想引用index.js中的namevalue值 var searchResult = require('./routes/index')； var myname = searchResult.doSearch(); 发现报错： C:\project\ex03\routes\index.js:21 var namevalue = req.body.username; ^ TypeError: Cannot read property 'body' of undefined at Object.exports.doSearch (C:\project\ex03\routes\index.js:21:21) at Object. (C:\project\ex03\search.js:8:28) at Module._compile (module.js:456:26) at Object.Module._extensions..js (module.js:474:10) at Module.load (module.js:356:32) at Function.Module._load (module.js:312:12) at Function.Module.runMain (module.js:497:10) at startup (node.js:119:16) at node.js:906:3 3.请问我怎样才能将namevalue传出来？