• Net WebForm jQuery Ajax 传值到aspx后台


    1.在Net WebForm中,编写aspx文件,有时候想在后台编写类似WebAPI形式的方法。前台使用jQuery Ajax方式调用。【PS:jQuery ajax Get方式将直接走后台Page_Load方法,到不了标记的处理方法。】运行效果:

    界面:

    返回值:

    2.前台代码

    <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="JQueryWebMethod.aspx.cs"
        Inherits="WebApplication1.JQueryWebMethod" %>

    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head runat="server">
        <title>jQuery ajax GET POST 到后台方法</title>
        <script src="Scripts/jquery-1.10.2.min.js" type="text/javascript"></script>
        <script type="text/javascript">
            function onGetAjax() {
                /********************************/
                window.alert('jquery ajax get方式无法直接调用aspx.cs后台方法!!!谨记!!!');
                return;
                /********************************/
                $.ajax({
                    type: 'get',
                    url: 'JQueryWebMethod.aspx/GetAjax?a=121&b=122',
                    contentType: 'application/x-www-form-urlencoded;charset=utf-8', //请求头格式,key/value
                    dataType: 'json', //返回值格式,json
                    success: function (data) {
                        var jsonObj = JSON.parse(data.d);
                        console.log('get:a=' + jsonObj["a"] + ',b=' + jsonObj["b"]);
                    },
                    error: function (data) {
                        console.log(data);
                    }
                });
            };
            /***************带参******************/
            function onPostAjax(obj) {
                $.ajax({
                    type: 'post',
                    url: 'JQueryWebMethod.aspx/PostAjax',
                    contentType: 'application/json;charset=utf-8', //请求头格式,json
                    dataType: 'json', //返回值格式,json
                    data: "{'a':'0','b':'1'}",
                    beforeSend: function () {
                        //禁用按钮,加遮罩层等
                        $(obj).attr('disabled', 'disabled');
                    },
                    success: function (data) {
                        var jsonObj = JSON.parse(data.d);
                        console.log('post:a=' + jsonObj["a"] + ',b=' + jsonObj["b"]);
                    },
                    error: function (data) {
                        var errMsg = data.responseJSON.Message;
                        console.log(errMsg);
                    },
                    complete: function () {
                        //启用按钮,取消遮罩层等
                        $(obj).removeAttr('disabled');
                    }
                });
            };
            /***************无参******************/
            function onPostAjax1(obj) {
                $.ajax({
                    type: 'post',
                    url: 'JQueryWebMethod.aspx/PostAjax1',
                    contentType: 'application/json;charset=utf-8', //请求头格式,json
                    dataType: 'json', //返回值格式,json
                    beforeSend: function () {
                        //禁用按钮,加遮罩层等
                        $(obj).attr('disabled', 'disabled');
                    },
                    success: function (data) {
                        var jsonObj = JSON.parse(data.d);
                        console.log('post:a=' + jsonObj["a"] + ',b=' + jsonObj["b"]);
                    },
                    error: function (data) {
                        var errMsg = data.responseJSON.Message;
                        console.log(errMsg);
                    },
                    complete: function () {
                        //启用按钮,取消遮罩层等
                        $(obj).removeAttr('disabled');
                    }
                });
            };
            /***************带参返回List<string>******************/
            function onPostAjax2(obj) {
                $.ajax({
                    type: 'post',
                    url: 'JQueryWebMethod.aspx/PostAjax2',
                    contentType: 'application/json;charset=utf-8', //请求头格式,json
                    dataType: 'json', //返回值格式,json
                    data: "{'a':'值1','b':'值2'}",
                    beforeSend: function () {
                        //禁用按钮,加遮罩层等
                        $(obj).attr('disabled', 'disabled');
                    },
                    success: function (data) {
                        var jsonObj = data.d;
                        $.each(jsonObj, function (index, value) {
                            console.log('post:index=' + index + ',value=' + value);
                        });
                    },
                    error: function (data) {
                        var errMsg = data.responseJSON.Message;
                        console.log(errMsg);
                    },
                    complete: function () {
                        //启用按钮,取消遮罩层等
                        $(obj).removeAttr('disabled');
                    }
                });
            };
        </script>
    </head>
    <body>
        <div>
            <input type="button" value="数据Ajax_Get提交到后台【不可用】" onclick="onGetAjax()" />&nbsp;&nbsp;&nbsp;&nbsp;
            <input type="button" value="数据Ajax_Post提交到后台【无参】" onclick="onPostAjax1(this)" />&nbsp;&nbsp;&nbsp;&nbsp;
            <input type="button" value="数据Ajax_Post提交到后台【带参返回json】" onclick="onPostAjax(this)" />&nbsp;&nbsp;&nbsp;&nbsp;
            <input type="button" value="数据Ajax_Post提交到后台【带参返回list】" onclick="onPostAjax2(this)" />&nbsp;&nbsp;&nbsp;&nbsp;
        </div>
    </body>
    </html>
    3.后台代码

    先引用System.Web.Services;

    然后代码。

    public partial class JQueryWebMethod : System.Web.UI.Page
        {
            protected void Page_Load(object sender, EventArgs e)
            {
            }
            /// <summary>
            /// 不可直接被前端Get调用
            /// </summary>
            /// <param name="a"></param>
            /// <param name="b"></param>
            /// <returns></returns>
            [WebMethod]
            public static string GetAjax(string a,string b)
            {
                return "{"a":""+a+"","b":""+b+""}";
            }

            /// <summary>
            /// AJAX POST可用 【带参,返回json字符串】
            /// </summary>
            /// <param name="a"></param>
            /// <param name="b"></param>
            /// <returns></returns>
            [WebMethod]
            public static string PostAjax(string a, string b)
            {
                return "{"a":"" + a + "","b":"" + b + ""}";
            }

            /// <summary>
            /// AJAX POST可用 【无参】
            /// </summary>
            /// <returns></returns>
            [WebMethod]
            public static string PostAjax1()
            {
                return "{"a":"返回值1","b":"返回值2"}";
            }

            /// <summary>
            /// AJAX POST可用 【带参,返回List<T>】
            /// </summary>
            /// <param name="a"></param>
            /// <param name="b"></param>
            /// <returns></returns>
            [WebMethod]
            public static List<string> PostAjax2(string a, string b)
            {
                return new List<string>(){a,b,"值3","值4"};
            }
        }

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  • 原文地址:https://www.cnblogs.com/jeff151013/p/11171946.html
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