Jquery + Ajax 调用 webService

webService中要实现ajax调用，则要加这句代码:

    // 若要允许使用 ASP.NET AJAX 从脚本中调用此 Web 服务，请取消对下行的注释。
    [System.Web.Script.Services.ScriptService] 

 代码下载

代码
        //无参数调用
        $(document).ready(function() {
            $('#btn1').click(function() {
                $.ajax({
                    type: "POST",   //访问WebService使用Post方式请求
                    contentType: "application/json", //WebService 会返回Json类型
                    url: WebServiceURL + "WebService1.asmx/HelloWorld", //调用WebService的地址和方法名称组合 ---- WsURL/方法名
                    data: "{}",         //这里是要传递的参数，格式为 data: "{paraName:paraValue}",下面将会看到       
                    dataType: 'json',
                    success: function(result) {     //回调函数，result，返回值
                        $('#dictionary').append(result.d);
                    }
                });
            });
        });


        //有参数调用
        $(document).ready(function() {
            $("#btn2").click(function() {
                $.ajax({
                    type: "POST",
                    contentType: "application/json",
                    url: WebServiceURL + "WebService1.asmx/GetWish",
                    data: "{value1:'心想事成',value2:'万事如意',value3:'牛牛牛',value4:2009}",
                    dataType: 'json',
                    success: function(result) {
                        $('#dictionary').append(result.d);
                    }
                });
            });
        });


        //返回集合（引用自网络，很说明问题）
        $(document).ready(function() {
            $("#btn3").click(function() {
                $.ajax({
                    type: "POST",
                    contentType: "application/json",
                    url: WebServiceURL + "WebService1.asmx/GetArray",
                    data: "{i:10}",
                    dataType: 'json',
                    success: function(result) {
                        $(result.d).each(function() {
                            //alert(this);
                            $('#dictionary').append(this.toString() + " ");
                            //alert(result.d.join(" | "));
                        });
                    }
                });
            });
        });


        //返回复合类型
        $(document).ready(function() {
            $('#btn4').click(function() {
                $.ajax({
                    type: "POST",
                    contentType: "application/json",
                    url: WebServiceURL + "WebService1.asmx/GetClass",
                    data: "{}",
                    dataType: 'json',
                    success: function(result) {
                        $(result.d).each(function() {
                            //alert(this);
                            $('#dictionary').append(this['ID'] + " " + this['Value']);
                            //alert(result.d.join(" | "));
                        });

                    }
                });
            });
        });

        //返回DataSet(XML)
        $(document).ready(function() {
            $('#btn5').click(function() {
                $.ajax({
                    type: "POST",
                    url: WebServiceURL + "WebService1.asmx/GetDataSet",
                    data: "{}",
                    dataType: 'xml', //返回的类型为XML ，和前面的Json，不一样了
                    success: function(result) {
                        //演示一下捕获
                        try {
                            $(result).find("Table1").each(function() {
                                $('#dictionary').append($(this).find("ID").text() + " " + $(this).find("Value").text());
                            });
                        }
                        catch (e) {
                            alert(e);
                            return;
                        }
                    },
                    error: function(result, status) { //如果没有上面的捕获出错会执行这里的回调函数
                        if (status == 'error') {
                            alert(status);
                        }
                    }
                });
            });
        });




        //Ajax 为用户提供反馈，利用ajaxStart和ajaxStop 方法，演示ajax跟踪相关事件的回调，他们两个方法可以添加给jQuery对象在Ajax前后回调
        //但对与Ajax的监控，本身是全局性的
        $(document).ready(function() {
            $('#loading').ajaxStart(function() {
                $(this).show();
            }).ajaxStop(function() {
                $(this).hide();
            });
        });