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Home > List of blog posts > jQuery中的Ajax操作 —2018年9月19日23时45分
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jQuery中的Ajax操作 —2018年9月19日23时45分
感恩的心的博客
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1、编程1： $.post()实现用户注册
提示，用邮箱或手机,密码进行注册，邮箱或手机必须在表中唯一，如果重复，必须给用户提示。密码必须要进行非空和长度判断。

实例

<!DOCTYPE html>
<html>
    <head>
        <title>Ajax Register</title>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <Script src="../0917/lib/jquery.js"></Script>
    </head>
    <body>
        <h3>Register</h3>
        <div>
            <p><label for="email"></label><input type="email" id="email" name="email"></p>
            <p><label for="password"></label><input type="password" id="password" name="password"></p>
            <p><button>submit</button></p>     
        </div>
        <script>
            $('button').on('click',function(){
                if(0===$('#email').val().length){
                    //alert('Email is null.');
                    $('#email').after($('<span style="color:red">Email is null.</span>').fadeOut(2000));
                    $('#email').focus();
                    return false;
                }
                
                if(0===$('#password').val().length){
                    $('#password').after($('<span style="color:red">password is null.</span>').fadeOut(2000));
                    $('#password').focus();
                    return false;
                }   
                
                if($('#password').val().length<3){
                    $('#password').after($('<span style="color:red">The length of password is samller than 6.</span>').fadeOut(2000));
                    $('#password').focus();
                    return false;
                }
                console.log($('#email').val());
                console.log($('#password').val());
                
            $.post('inc/check.php',
            {
                email: $('#email').val(),
                password: $('#password').val()
            }
            ,function(data,status,xhr){
                console.log($(this));
                if(data.status===1){
                    $('button')
                            .after('<span style="color:green"></span>')
                            .next()
                            .html(data.msg).fadeOut(2000);
                }
                
                if(data.status===0){
                    $('button')
                            .after('<span style="color:red"></span>')
                            .next()
                            .html(data.msg).fadeOut(2000);
                }
                
                
                
            },'json');
            });
            
            
            
            //POST method
            $url='inc/check.php';
            //$data="{email:"+$('#email').val()+",password:"+$('#password').val()+"}";

        </script>
    </body>
</html>

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2. 编程: 用ajax实现省/市/县三联下拉框联动查询功能，可使用json完成。


实例

<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Three:Province City Area</title>
        <Script src="../0917/lib/jquery.js"></Script>
    </head>
    <body>
        Province <select name="" id="Province"></select>
        City <select name="" id="City"></select>
        Area <select name="" id="Area"></select>
        <p id="addr"></p>
        <script>
            let address = '';
            $(function () {
                $.getJSON('inc/1.json', function (data) {
                    let option = '<option value="">Choose Province</option>';
                    $.each(data, function (i) {
                        option += '<option value=' + data[i].proId + '>' + data[i].proName + '</option>';
                    });
                    $('#Province').html(option);
                });

                $('#Province').change(function () {
                    console.log($(this).find(':selected').text());
                    $.getJSON('inc/2.json', function (data) {
                        let option = '<option value="">Choose City</option>';
                        $.each(data, function (i) {
                            if ($('#Province').val() == data[i].proId) {
                                option += '<option value=' + data[i].cityId + '>' + data[i].cityName + '</option>';
                            }
                        });

                        $('#City').html(option);
                        address = '<span>' + $('#Province').find(':selected').text() + '</span>';
                        $('#addr').append(address);
                    });


                });

                $('#City').change(function () {
                    console.log($(this).find(':selected').text());
                    $.getJSON('inc/3.json', function (data) {
                        let option = '<option value="">Choose Area</option>';
                        $.each(data, function (i) {
                            if ($('#City').val() == data[i].cityId) {
                                option += '<option value=' + data[i].areaId + '>' + data[i].areaName + '</option>';
                            }
                        });

                        $('#Area').html(option);
                        address = '<span>' + $('#City').find(':selected').text() + '</span>';
                        $('#addr').append(address);
                    });


                });

                $('#Area').change(function () {
                    address = '<span>' + $('#Area').find(':selected').text() + '</span>';
                    $('#addr').append(address);
                });

            });


        </script>




    </body>
</html>

运行实例 »

点击 "运行实例" 按钮查看在线实例

Correction status：qualified

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