获取查询字符串值并将其显示在我的html页面中 [英] Get the query string value and display it in my html page

问题描述

重定向到home.html页面后，我可以看到我在上一页中给出的查询字符串值。

After redirecting to home.html page, i can see the querystring values which i had given in the previous page.

Home.html?FirstName=dd&LastName=ee&smtButton=Submit

我得到的结果为：

firstname = undefined
lastname = undefined
age = undefined

任何人都可以帮助我解决这个问题？

Could anyone help me to solve this?

JS：

function getParams() {
    var idx = document.URL.indexOf('?');
    var params = new Array();
    if (idx != -1) {
        var pairs = document.URL.substring(idx + 1, document.URL.length).split('&');
        for (var i = 0; i < pairs.length; i++) {
            nameVal = pairs[i].split('=');
            params[nameVal[0]] = nameVal[1];
        }
    }
    return params;
}

params = getParams();
firstname = unescape(params["firstname"]);
lastname = unescape(params["lastname"]);
age = unescape(params["age"]);
document.write("firstname = " + firstname + "<br>");
document.write("lastname = " + lastname + "<br>");
document.write("age = " + age + "<br>");

推荐答案

在函数内部 function getParams （）你被声明为变量 var params = new Array（）; ，我认为这会让你感到困惑

Inside your function function getParams() you are declared variable var params = new Array(); , I think this makes confusion for you

如果找到匹配项，则指定了url param，如 params [nameVal [0]] = nameVal [1]; ，这实际上并没有增加值到数组对象。所以 params.length 是 0 。但它将作为数组是对象的实例..即 params instanceof Object 是 true

if a match is found , you assigned url param like params[nameVal[0]] = nameVal[1];, this actually not adding value into array object. so params.length is 0 .but it will works as array is instance of object .. ie params instanceof Object is true

所以换成基本对象..以避免混淆

so change into basic object .. to avoid confusion

function getParams() {
    var idx = document.URL.indexOf('?');
    var params = {}; // simple js object
    .. here goes other code
}

和对象键区分大小写，因此 FirstName 将起作用..

and object key is case sensitive, so FirstName will work ..

firstname = unescape(params["FirstName"]);

打印所有值试试这个

params = getParams();

for( var i in params ){
    console.log( i , params[i] );
}

它将打印

FirstName dd    
LastName ee    
smtButton Submit

我修改了你的getParams代码

and I have modified your getParams code

function getParams() {

    var params = {},
        pairs = document.URL.split('?')
               .pop()
               .split('&');

    for (var i = 0, p; i < pairs.length; i++) {
           p = pairs[i].split('=');
           params[ p[0] ] =  p[1];
    }     

    return params;
}

这篇关于获取查询字符串值并将其显示在我的html页面中的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！