ajax post 后台方法无法获取字符串只能获取int类型

$.ajax({
                type: "post",
                dataType: "json",
                contentType: "application/json", //注意：WebMethod()必须加这项，否则客户端数据不会传到服务端
                data: "{name:" + name + ",pass:" + pass + "}",
                url: "PlatformLevelUserManagement/UserManagement.aspx/Search",//模拟web服务，提交到方法
                // 可选的 async:false,阻塞的异步就是同步
                //beforeSend:function(){
                //    // do something.
                //    // 一般是禁用按钮等防止用户重复提交
                //    $("#btnClick").attr({disabled:"disabled"});
                //    // 或者是显示loading图片
                //},


                success: function (data) {
                    var ships = eval('(' + data.d + ')');
                    var str = data.d;
                    $("#div_table table tbody").html("");
                    if (ships != null) {
                        if (ships.length) {
                            $("#div_table").show();
                            var trs = "";
                            for (var i = 0; i < ships.length; i++) {
                                trs += "<tr><td class='auto-style1'>" + ships[i].SuperUserIName + "</td><td>" + ships[i].SuperUserIPass + "</td><td>" + ships[i].Mobile + "</td><td>" + ships[i].IDCard + "</td><td>" + ships[i].Email + "</td><td><button id='sample_editable' class='blue_1' data-toggle='modal' data-target='#amendModal' onclick='show(this)' value='" + ships[i].SuperUserID + "'>修改 <i class='icon-pencil'></i></button><input name='ok' type='button' onclick='jsa();' class='blue ' id='ok' value='启用√'></td></tr>";
                            }
                            $("#div_table table tbody").append(trs);

                        }
                    }

                },

                error: function (data) {
                    alert("error: " + data.d);
                }