Insert label value in table

Question

There is dropdown in abc page and values

323r

244f

 

and there is button and table

 

TID TTID

1    323r

2    244f

 

so when i select value from dropdown and click on button then value is save in table

 

and after this there is def page

in that there is label i save dropdown selected value in label  

 

there is another table 2

 

in that

 

id TTID value3

1  323r  234

2  323r  456

 

so i want when i click on button which is def page want to save label value  in TTID column in table 2

for this i try this in linq

 

protected void Button2_Click(object sender, EventArgs e)
       {
           string TTID = "";

           tbl_fl_schedule ss = new tbl_fl_schedule();
           Data t = new Data();
           ss.TTID = TTID ;
           {

               ss.TTID = HttpContext.Current.Session["Vechilevalue"].ToString();
           }

           t.tbl_fl_schedule.Add(ss).ToString();
           t.SaveChanges();
       }

 and this show an error

System.Data.Entity.Validation.DbEntityValidationException: Validation failed for one or more entities. See 'EntityValidationErrors' property for more details.

 

 

i want to do this through jquery

i  try this

public static void insertservies(string Vechile_ID)
    {
        tbl_fl_schedule ss = new tbl_fl_schedule();
        Data t = new Data();
        ss.TTID = TTID ;
        {
            //ss.Vechile_ID=
            ss.TTID  = HttpContext.Current.Session["Vechilevalue"].ToString() ;
        }

        t.tbl_fl_Services_schedule.Add(ss).ToString();
        t.SaveChanges();
    }

 

<script type="text/javascript">
        $(function () {
            debugger;
            $('[ID*=btnadd]').on('click', function () {

                var TTID = '<%=Session["Vechilevalue"]%>';

                //var Frequency = $('#txt_repeat').val();
                var obj = {};
                obj.TTID = TTID ;

                get(obj);
            });
        });

            function get(obj) {
                debugger;
                var ins = {};
                ins.Vechile_ID = obj.Vechile_ID;

                $.ajax({
                    type: "POST",
                    url: "Maintenance.aspx/insertservies",
                    contentType: "application/json;charset=utf-8",
                    data:JSON.stringify(ins),
                    dataType: "json",
                    success: function (result) {
                        debugger;
                        //("#Label1") = obj.Vechile_ID;
                       // $("#Label1" + obj.Vechile_ID).html(ins.Vechile_ID);

                    },
                    error:function(error)
                    {
                        var r = error.responseText;
                        var errorMessage = r.Message;
                         alert(errorMessage);
                        alert(r);
                        alert("error");

                    }

                });
            };


    </script>

 but this is also not working