Knockoutjs 实现省市联动
html code
<!doctype>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta charset="utf-8">
<link rel="stylesheet" type="text/css" href="bower_components/bootstrap/dist/css/bootstrap.css">
<link rel="stylesheet" type="text/css" href="bower_components/bootstrap/dist/css/bootstrap-theme.css">
<script src="bower_components/jquery/dist/jquery.js"></script>
<script src="bower_components/bootstrap/dist/js/bootstrap.js"></script>
<script src="bower_components/knockoutjs/dist/knockout.debug.js"></script>
</head>
<body>
<div class="container">
<div class="row">
<div class="col-md-3" id="country">
<select class="form-control" data-bind="options: countryArray, optionsText: 'countryName', optionsValue: 'countryId', value: countryValue, optionsCaption: 'please select', event:{'change': getCity}"></select>
</div>
<div class="col-md-2" id="village">
<select class="form-control" data-bind="visible: countryValue, options: cityArray, optionsText: 'cityName', optionsCaption: 'Please select', optionsValue: 'cityId', value: 'cityValue'"></select>
</div>
</div>
</div>
</body>
<script>
var countryModel = function(){
var that = this;
that.countryArray = ko.observableArray();
that.countryValue = ko.observable();
$.getJSON('http://localhost/demo.php', function(response) {//动态获取国家
that.countryArray(response);
})
that.getCity = function() {
var id = that.countryValue();
$.getJSON('http://localhost/demo.php', {id: id}, function(response){//动态获取城市
that.cityArray(response);
})
}
that.cityArray = ko.observableArray();
}
ko.applyBindings(new countryModel());
</script>
</html>
javascript code
<?php
$country = array(
array(
'countryName' => 'china',
'countryId' => 1,
),
array(
'countryName' => 'japan',
'countryId' => 2,
),
array(
'countryName' => 'korean',
'countryId' => 3,
),
);
if(isset($_GET['id']) && $_GET['id'] == '1')
{
$city = array(
array(
'cityName' => 'beijing',
'cityId' => 1,
),
array(
'cityName' => 'shanghai',
'cityId' => 2,
),
);
echo json_encode($city);
}
else if(isset($_GET['id']) && $_GET['id'] == 2)
{
$city = array(
array(
'cityName' => 'dongjing',
'cityId' => 1,
),
array(
'cityName' => 'daban',
'cityId' => 2,
),
);
echo json_encode($city);
}
else if(isset($_GET['id']) && $_GET['id'] == 3)
{
$city = array(
array(
'cityName' => '首尔',
'cityId' => 1,
),
array(
'cityName' => 'ahha',
'cityId' => 2,
),
);
echo json_encode($city);
}
else
{
echo json_encode($country);
}