Question

我正在使用谷歌货币转换器。一切正常但在页面刷新时我无法将输入值设置为其原始值。下面是我的代码。

<script src = "js/CurrencyConverter.js" type="text/javascript"></script>
<select id="FromCurrency" class="CurrencyDropDown"></select>        
<input type = "text" id = "UnitPrice" value="enter amount"/>
</br>
<select id="ToCurrency" class = "CurrencyDropDown"></select>        
<input type = "text" id = "destinationPrice" value="result"/>
<script>
    $(document).ready(function(){
        $('select#ToCurrency').change(function(){
            convertcurrency();
        })

    });
    function convertcurrency(){
        var url = $('input[type=hidden]').val();
        var priceunit = $('input#UnitPrice').val();// alert(priceunit);
        var fromcurrencycode = $('select#FromCurrency').val(); //alert(fromcurrencycode);
        var tocurrencycode = $('select#ToCurrency').val();// alert(tocurrencycode);
        ConvertCurrency(url, priceunit,fromcurrencycode,tocurrencycode);        
    }
    function ConvertCurrency(Url , PriceUnit,fromCurrencyCode,toCurrencyCode){ 
        $.ajax({
            url: '<?php echo site_url('curchange')?>',
            type : 'POST',
            dataType: "html",
            data : {unitprice : PriceUnit, fromcode : fromCurrencyCode, tocode : toCurrencyCode},
            success: function (data) {
                if(data != '')
                    $('input#destinationPrice').val(data);
                else
                    alert('Cannot convert');
            },
            error :  function(){
                alert('Error in Loading Data');
            }


        });
        return false;
    }
</script>

在CurrencyConverter.js中的

我有窗口加载下载到下拉列表的国家列表。

curchange.php

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');

    Class Curchange extends CI_Controller{

        function __construct() {
            parent::__construct();
        }

        function index(){
            $unit = $this->input->post('unitprice');
            $from = $this->input->post('fromcode');
            $to = $this->input->post('tocode');
            $url = 'http://www.google.com/ig/calculator?hl=en&q='.$unit.$from.'=?'.$to;
            $ch = curl_init();
    $timeout = 0;
    curl_setopt ($ch, CURLOPT_URL, $url);
    curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch,  CURLOPT_USERAGENT , "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1)");
    curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
    $rawdata = curl_exec($ch); 
    curl_close($ch);
    $data = explode('"', $rawdata);
        $error = explode(' ', $data[5]);
        if(empty($error[0])){
            $data = explode(' ', $data[3]);
            $var = round($data[0], 3);
        }else{
            $var = '';
        }
        echo $var;
        }

    }
?>

代码工作正常。正在转换货币但是当我更改货币然后刷新页面而不是将输入值显示为“输入金额”和“结果”时，输入的html标记显示初始值。为什么？

欢迎任何帮助/建议。

Answer 1

在$(document).ready(function(){

之后写两条语句

像：

$(document).ready(function(){

  $("#UnitPrice").val("enter amount");
  $("#destinationPrice").val("result");
 });

它将在页面刷新

上设置默认值

刷新输入值不更改为其默认值

1 个答案: