jquery 调用asp.net后台代码

1.需要引用对应的命名空间

System.Web.Services

2.后台方法；

必须是static 约束   必须添加[WebMethod()] 属性

示例：

<script type="text/javascript" src="Scripts/jquery-1.4.1.min.js"></script>
    <script>
        function a() {
            $.ajax({
                type: "post",
                url: "WebForm1.aspx/GetString",
                dataType: "json",
                contentType: "application/json; charset=utf-8",
                success: function (data) {
                    alert(data.d);
                    var m = eval("("+data.d+")");
                    alert(m.name);
                }
            });
        }
    </script>

[System.Web.Services.WebMethod()]
        public static string GetString()
        {
            return "{name:'lin'}";
        }