shahana poinen

shahana poinen

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I am having NullReferenceException

May 24 2015 3:37 PM
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.Configuration;
using System.Data;
public partial class Currency : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
string senderNum;
string receiverNumber;
string reg;
senderNum = Request.QueryString.Get("sender");
receiverNumber = Request.QueryString.Get("receiver");
reg = Request.QueryString.Get("msg");
SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["rateD"].ConnectionString);
char[] splitchar = { ' ' };
if (reg == null == false)
{
string[] regis = reg.Split(splitchar);
string username;
string password;
//bool readerHasRows = false;
username = regis[0].ToString();
password = regis[1].ToString();
conn.Open();
SqlCommand cmd = new SqlCommand("SELECT Username FROM tblreg WHERE Username = @Username", conn);
cmd.Parameters.AddWithValue("@username", username);
SqlDataAdapter da = new SqlDataAdapter(cmd);
System.Data.DataTable dt = new DataTable();
da.Fill(dt);
if (dt.Rows.Count > 0)
{
//Try
Response.Redirect("http://localhost:9333/CurrencyConvertorOzeki?login=admin&password=abc123&action=sendMessage&messagetype=SMS:TEXT&recepient=" + senderNum + "&messageData= User already registered, Please register again");
}
else
{
SqlCommand cmd4 = new SqlCommand("INSERT INTO tblreg VALUES(@username,@password)", conn);
cmd4.Parameters.AddWithValue("@username", username);
cmd4.Parameters.AddWithValue("@password", password);
cmd4.ExecuteNonQuery();
Response.Redirect("http://localhost:9333/CurrencyConvertorOzeki?login=admin&password=abc123&action=sendMessage&messagetype=SMS:TEXT&recepient=" + senderNum + "&messageData= user succesfully registered");
}
}
else
{
string[] con = reg.Split(splitchar);
string username;
double value;
string count1;
string count2;
username = con[0].ToString();
value = double.Parse(con[1]);
count1 = con[2].ToString();
count2 = con[3].ToString();
conn.Open();
SqlCommand cmd5 = new SqlCommand("SELECT Username FROM tblreg WHERE Username = @Username", conn);
cmd5.Parameters.AddWithValue("@username", username);
SqlDataAdapter da1 = new SqlDataAdapter(cmd5);
System.Data.DataTable dt1 = new DataTable();
da1.Fill(dt1);
if (dt1.Rows.Count > 0)
{
conn.Open();
SqlCommand cmd6 = new SqlCommand("SELECT CountryCode FROM tblCountry WHERE CountryCode = @CountryCode1 AND CountryCode= @CountryCode2", conn);
cmd6.Parameters.AddWithValue("@CountryCode1", count1);
cmd6.Parameters.AddWithValue("@CountryCode2", count2);
SqlDataAdapter dac = new SqlDataAdapter(cmd6);
System.Data.DataTable dtc = new DataTable();
dac.Fill(dtc);
if (dtc.Rows.Count > 0)
{
net.webservicex.www.CurrencyConvertor conver = new net.webservicex.www.CurrencyConvertor();
net.webservicex.www.Currency From = (net.webservicex.www.Currency)Enum.Parse(typeof(net.webservicex.www.Currency), count1.ToString(), true);
net.webservicex.www.Currency To = (net.webservicex.www.Currency)Enum.Parse(typeof(net.webservicex.www.Currency), count2.ToString(), true);
double d = conver.ConversionRate(From, To);// web service method to call for conversion currency rate
String message = count1 + " To " + count2 + " : " + (d * Convert.ToDouble(value)).ToString();
Response.Redirect("http://localhost:9333/CurrencyConvertorOzeki?login=admin&password=abc123&action=sendMessage&messagetype=SMS:TEXT&recepient=" + senderNum + "&messageData=" + message + "");
}
}
else
{
Response.Redirect("http://localhost:9333/CurrencyConvertorOzeki?login=admin&password=abc123&action=sendMessage&messagetype=SMS:TEXT&recepient=" + senderNum + "&messageData= Please first register to get access to the service");
}
}
}
}

Answers (6)