Generation random number for the text entered in the textbox - asp.net

Question

I have a textbox,when a user enters any number(say 3) in the textbox, that many random numbers should be generated.This is what I have done so far but its generating the same random number for all 3(or as many as the user enters) records.
protected void Page_Load(object sender, EventArgs e)
{
for (Int32 x = 0; x <= 50; x++)
{
txtRandomNumber.Text = GetRandomString(x);
}
}
public string GetRandomString(int seed)
{
const string alphabet = "R";
Random rnd = new Random((seed + DateTime.Now.Millisecond));
string result = rnd.Next(10000, 99999).ToString();
string alpha = alphabet.Substring(rnd.Next(alphabet.Length - 1));
int replacementIndex = rnd.Next(0);
result = result.Remove(replacementIndex, 1).Insert(replacementIndex, alpha);
return result;
}
protected void btnSave_Click(object sender, EventArgs e)
{
for (int i = 1; i <= int.Parse(txtNoOfPin.Text); i++)
{
if (i == 1)
{
string strConnection = ConfigurationManager.ConnectionStrings["ReliableLife"].ToString();
SqlConnection con = new SqlConnection(strConnection);
string sqlQuery = "insert into AllotPin(NoOfPin,PinNumber) values(#NoOfPin,#PinNumber)";
con.Open();
SqlCommand cmd = new SqlCommand(sqlQuery, con);
cmd.Parameters.AddWithValue("#NoOfPin", int.Parse(txtNoOfPin.Text));
cmd.Parameters.AddWithValue("#PinNumber", txtRandomNumber.Text);
cmd.ExecuteNonQuery();
}
else
{
string r_no = "";
for (Int32 x = 0; x <= 50; x++)
{
r_no = GetRandomString(x);
//Response.Write(GetRandomString(x) + "<br />");
}
string strConnection = ConfigurationManager.ConnectionStrings["ReliableLife"].ToString();
SqlConnection con = new SqlConnection(strConnection);
string sqlQuery = "insert into AllotPin(NoOfPin,PinNumber) values(#NoOfPin,#PinNumber)";
con.Open();
SqlCommand cmd = new SqlCommand(sqlQuery, con);
cmd.Parameters.AddWithValue("#NoOfPin", int.Parse(txtNoOfPin.Text));
cmd.Parameters.AddWithValue("#PinNumber", txtRandomNumber.Text);
cmd.ExecuteNonQuery();
}
}
}
Please Help,Thanks

Answer 1

try to apped random number to textbox
for (Int32 x = 0; x <= 50; x++)
{
txtRandomNumber.Text = x +" "+ GetRandomString(x) +" "+ txtRandomNumber.Text;
}
The program has some redundancy but it will generate random numbers as per your requirement.

Answer 2

Thanks for the help.
I solved the problem doing this in the else part of the code:
for (Int32 x = 0; x <= 50; x++)
{
r_no = GetRandomString(x);
txtRandomNumber.Text = r_no;
}
This gave the output as required.