Facing trouble while inserting bulk data into sql - sql-server

Question

In MVC4 , i have following code in my view :
<script>
var things = [];
function fun () {
var Quran = {
"surah": things[1].surah,
"ayah": things[1].ayah,
"verse": things[1].verse
};
things.push(Quran);
for (var n = 0; n < length; n++) {
$.ajax({
contentType: 'application/json; charset=utf-8',
method: 'GET',
url: "Gateway/DB_Rola?action=1",
data: things[n],
success: function (Data) {
var mera_obj = Data.key;
document.getElementById("Param2").value = '(' + mera_obj.Response_Code + ' , ' + mera_obj.Response_Description + ')';
},
error: function () {
alert("ERROR: can't connect to Server this time");
return false; }
});
alert("done for "+(n+1));
} // loop ends
return false;
}; // function ends
and controller method is :
public ActionResult DB_Rola(thing things)
{
string connectionString = #"Data Source=(LocalDB)\v11.0;AttachDbFilename=C:\PROGRAM FILES (X86)\MICROSOFT SQL SERVER\MSSQL.1\MSSQL\DATA\PEACE_QURAN.MDF;Integrated Security=True";
System.Data.SqlClient.SqlConnection connection = new SqlConnection(connectionString);
int surah = things.surah;
int ayah =things.ayah;
String verse = things.verse;
// designing parametiric_query from the parameters
string query = "insert into Ayyat_Translation_Language_old_20131209 values(null,null,#Surah,#Verse)";
SqlCommand cmd = new SqlCommand(query, connection);
connection.Open();
//setting parameters for parametric query
SqlParameter Parm1 = new SqlParameter("Surah", surah);
SqlParameter Parm2 = new SqlParameter("Ayah", ayah);
SqlParameter Parm3 = new SqlParameter("Verse", verse);
//adding parameters
cmd.Parameters.Add(Parm1);
cmd.Parameters.Add(Parm2);
cmd.Parameters.Add(Parm3);
cmd.ExecuteNonQuery();
System.IO.StreamWriter file = new System.IO.StreamWriter(#"E:\Office_Work\Peace_Quran\Peace_Quran\Files\hisaab.txt", true);
file.WriteLine(" "+things.ayah);
file.Close();
connection.Close();
return View();
}
as mentioned above in code ,there is loop in my view page that passes single object at a time which is received in above controller method .it works for small amount of data but when i send bulk .i.e. 50+ records at once, some of records are not saved in my DB. i don't know what's wrong with my DB code. please help me figure it out.