how to pass values using array from list

Question

my front is

<input type="button" value="Save" onclick=" fn_save()"/>

 

the below code does not work pls tell me what mistake i have done here 

 

function fn_save()

{

try

{

endEditing();

var rows = $('#dg_main').datagrid('getRows');

Appjquery.WebService1.insert(is_connstring, rows, update_result, GetFault_result1);

}

catch (e)

{

alert(e);

}

}

function update_result(result)

{

if (result[0].dsexecstatus = "FAIL")

{

document.getElementById("lbl_msg").innerHTML = result[0].dsmsg;

}

else

{

document.getElementById("lbl_msg").innerHTML = result[0].dsmsg;

}

}

function GetFault_result1(result)

{

document.getElementById("lbl_msg").innerHTML = result[0].dsmsg;

}

my backend is 

 

[WebMethod(EnableSession = true)]

public List<Emptab> insert(string[] as_connstring, List<Emptab> as_values)

{

Emptab tdat = new Emptab();

List<Emptab> tdata_list = as_values;

try

{

string[] arr = new string[3];

foreach (Emptab tdata in tdata_list)

{

arr[0] = tdata.rnumber;

arr[1] = tdata.sname;

arr[2] = tdata.depart;

arr[3] = tdata.active;

}

string ls_query = "";

if (as_connstring[0] == "GET")

{

ls_query = @"insert into student values('" + arr[0] + "','" + arr[1] + "','" + arr[2] + "','" + arr[3] + "') ";

odcon = new OdbcConnection(con);

odcon.Open();

comm = new OdbcCommand(ls_query, odcon);

comm.ExecuteNonQuery();

tdat.dsexecstatus = "SUCCESS";

tdat.dsmsg = "Datas From Table";

tdata_list.Add(tdat);

}

else

{

tdat.dsexecstatus = "Fail";

tdat.dsmsg = "Fail to Update";

tdata_list.Add(tdat);

}

}

catch (Exception)

{

throw;

}

odcon.Close();

return tdata_list;

}

}

}