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System.NullReferenceException was unhandled

Discussion in 'C#' started by blax00, Sep 1, 2010.

  1. blax00

    blax00 New Member

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    hello

    I'm beginner on c#. I'm getting this error:

    System.NullReferenceException was unhandled

    and my code:

    Code:
    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using GittiGidiyor;
    using GittiGidiyor.City;
    
    namespace ConsoleApplication1
    { 
        class Program
        {
            static void Main(string[] args)
            {
                [B]CityService cityservice = ServiceProvider.getCityService();[/B]
                cityServiceResponse response = cityservice.getCities(1, 3, "", "tr");
    
              
                if (response != null && response.ackCode.ToString().Equals("success"))
                {
                    cityType[] city = response.cities;
                    foreach (cityType cities in city)
                    {
    
                        Console.WriteLine("citycode :" + cities.trCode + " / cityname :" + cities.cityName);
                    }
                }
                else
                {
                    Console.WriteLine("errorid :" + response.error.errorId);
                    Console.WriteLine("errorcode :" + response.error.errorCode);
                    Console.WriteLine("errormessage :" + response.error.message);
                }
            }              
            }
        }
    
    I've bolded line about getting error
    I'll be glad if someone help me
    thanks
     

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