i have error there is no row at position 0

Question

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Data.SqlClient;

using System.Data;

using System.IO;

public partial class Show : System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

{

String id;

if (Convert.ToString(Session["login"]) != "1")

{

Response.Redirect("Login.aspx?msg=Login to your accout. To access the page !!!");

}

if (!Page.IsPostBack)

{

FillMovieListing();

FillShowListing();

}

}

protected void save_data_Click(object sender, EventArgs e)

{

//finding audi id and total seats of audi from booking_show_id

String audiid = this.getAudiID(booking_show_id.Text);

String nseats = this.getAudiIDSeats(audiid);

//finding total seats book as per booking id

String bs = this.getAudiNumberOfBookSeats(booking_show_id.Text);

//checking whether seats are remaining

//if not display error message then return

int availableseats = int.Parse(nseats) - int.Parse(bs);

if (availableseats < int.Parse(booking_no_seats.Text))

{

//show error

Response.Redirect("Movies.aspx?msg=seats are not avilable sry!!!");

return;

}

String ticketCost = this.getShowAmount(booking_show_id.Text);

int totalCost = Convert.ToInt32(ticketCost) * Convert.ToInt32(booking_no_seats.Text);

DBConnection cn = new DBConnection();

String SQL;

String userID = Convert.ToString(Session["users_id"]);

SQL = "INSERT INTO booking (booking_movie_id, booking_user_id, booking_show_id, booking_date, booking_no_seats, booking_amount, booking_status ) VALUES (@1, @2, @3, @4, @5, @6, @7);";

SqlCommand insertCommand = new SqlCommand(SQL, cn.con);

insertCommand.CommandType = CommandType.Text;

insertCommand.Parameters.AddWithValue("@1", booking_movie_id.Text);

insertCommand.Parameters.AddWithValue("@2", userID);

insertCommand.Parameters.AddWithValue("@3", booking_show_id.Text);

insertCommand.Parameters.AddWithValue("@4", booking_date.Text);

insertCommand.Parameters.AddWithValue("@5", booking_no_seats.Text);

insertCommand.Parameters.AddWithValue("@6", totalCost);

insertCommand.Parameters.AddWithValue("@7", '0');

insertCommand.ExecuteNonQuery();

//finding last inserted id

SqlDataAdapter da = new SqlDataAdapter("Select max(booking_id) from booking", cn.con);

DataSet tempds = new DataSet();

da.Fill(tempds);

long bookingID = long.Parse(tempds.Tables[0].Rows[0][0].ToString());

cn.con.Close();

Response.Redirect("payment.aspx?booking_id=" + bookingID + "&amt=" + totalCost);

}

private void FillMovieListing()

{

DBConnection cn = new DBConnection();

SqlCommand cmd;

cmd = new SqlCommand("Select * From movie", cn.con);

cmd.CommandType = CommandType.Text;

SqlDataAdapter sda = new SqlDataAdapter(cmd);

DataTable dt = new DataTable();

sda.Fill(dt);

booking_movie_id.DataValueField = "movie_id";

booking_movie_id.DataTextField = "movie_name";

booking_movie_id.DataSource = dt;

booking_movie_id.DataBind();

booking_movie_id.Items.Insert(0, "Please Select");

}

private void FillShowListing()

{

DBConnection cn = new DBConnection();

SqlCommand cmd;

cmd = new SqlCommand("Select * From show", cn.con);

cmd.CommandType = CommandType.Text;

SqlDataAdapter sda = new SqlDataAdapter(cmd);

DataTable dt = new DataTable();

sda.Fill(dt);

booking_show_id.DataValueField = "show_id";

booking_show_id.DataTextField = "show_from_time";

booking_show_id.DataSource = dt;

booking_show_id.DataBind();

booking_show_id.Items.Insert(0, "Please Select");

}

public String getShowAmount(String id)

{

DBConnection cn = new DBConnection();

String SQL = "SELECT * FROM show WHERE show_id = '" + id + "'";

SqlCommand command = new SqlCommand(SQL, cn.con);

DataTable dt = new DataTable();

SqlDataAdapter adp = new SqlDataAdapter(command);

adp.Fill(dt);

DataRow dr = dt.Rows[0];

String showAmount = Convert.ToString(dr["show_ticket_price"]);

cn.con.Close();

return showAmount;

}

public String getAudiID(String id)

{

DBConnection cn = new DBConnection();

String SQL = "SELECT show_audi_id FROM show WHERE show_id = '" + id + "'";

SqlCommand command = new SqlCommand(SQL, cn.con);

DataTable dt = new DataTable();

SqlDataAdapter adp = new SqlDataAdapter(command);

adp.Fill(dt);

DataRow dr = dt.Rows[0];

String showAmount = Convert.ToString(dr["show_audi_id"]);

cn.con.Close();

return showAmount;

}

public String getAudiIDSeats(String id)

{

DBConnection cn = new DBConnection();

String SQL = "SELECT audi_no_of_seats FROM audi WHERE audi_id = '" + id + "'";

SqlCommand command = new SqlCommand(SQL, cn.con);

DataTable dt = new DataTable();

SqlDataAdapter adp = new SqlDataAdapter(command);

adp.Fill(dt);

DataRow dr = dt.Rows[0];

String showAmount = Convert.ToString(dr["audi_no_of_seats"]);

cn.con.Close();

return showAmount;

}

public String getAudiNumberOfBookSeats(String id)

{

DBConnection cn = new DBConnection();

String SQL = "SELECT booking_no_seats FROM booking WHERE booking_show_id = '" + id + "'";

SqlCommand command = new SqlCommand(SQL, cn.con);

DataTable dt = new DataTable();

SqlDataAdapter adp = new SqlDataAdapter(command);

adp.Fill(dt);

DataRow dr = dt.Rows[0];

String showAmount = Convert.ToString(dr["booking_no_seats"]);

cn.con.Close();

return showAmount;

}

}