Answer / raviarsenal

C # in form load paste this code


try
{
SqlConnection con = new SqlConnection
(@"Data Source=.\sqlexpress;Initial
Catalog=Hospital;Integrated Security=True");
con.Open();
q = "select Billno from PatientBill";
SqlCommand cmd = new SqlCommand(q, con);
SqlDataReader dr = cmd.ExecuteReader();
while (dr.Read())
{
bill = Convert.ToInt32(dr
["Billno"].ToString());
}
txtbillno.Text = (bill + 1).ToString();
dr.Close();
cmd.Dispose();
con.Close();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}

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