把C#对象转换为json字符串

下面的代码写在ashx一般处理程序中

声明context.Response.ContentType = "application/json";代表服务器端返回的数据为json字符串

context.Response.Write(new JavaScriptSerializer().Serialize(new { status = "OK", Msg = "正确" }));

在html页面怎么接收里？(下面是没有用jQuery的ajax)

 <script type="text/javascript">

        window.onload = function () {

            document.getElementById("btn").onclick = function () {

                alert("weqq");

                var username = document.getElementById("uname").value;

                var password = document.getElementById("pwd").value;

                var xmh = window.XMLHttpRequest ? new XMLHttpRequest() : new ActiveXObject("Microsoft.XMLHTTP");

                xmh.open("post", "/Handler1.ashx?username=" + username + "&password=" + password, true);

                xmh.onreadystatechange = function () {

                    if (xmh.readyState == 4) {

                        if (xmh.status == 200) {

                            //var x=eval('('+xmh.responseText+')');//把json字符串转换为json对象

                                                                    //上下两种方法都行

                            var x = JSON.parse(xmh.responseText);//把json字符串转换为json对象

                            alert(x.status);

                        }

                        else {

                            alert("出错");

                        }

                    }

                };

                xmh.send();

            }

        };

    </script>