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sriram anilsriram anil 

error:OUTPUT CityName:<NewDataSet />.

I am enter input:INDIA, output display cities in country. but not showing data how to solve any one explain
vfpage:
======
<apex:page controller="Searchwether">
<apex:form>
ENTER COUNTRYNAME:<apex:inputText value="{!CountryName}"/><br/>
<apex:commandButton value="Submit" action="{!GetCities}"/>

OUTPUT CityName:<apex:outputText value="{!CityName}"/>

</apex:form>
</apex:page>
APEXCLASS:
==========
//Generated by wsdl2apex
public class Searchwether {
 public String CountryName{get;set;}
 public String CityName{get;set;}
 public void GetCities(){
 
   Searchwether.GlobalWeatherSoap wrs = new Searchwether.GlobalWeatherSoap();
   string s = wrs.GetCitiesByCountry('CountryName');
  
   CityName=s ;
 
 
 
 }
    public class GetWeather_element {
        public String CityName;
        public String CountryName;
       
        private String[] CityName_type_info = new String[]{'CityName','http://www.webserviceX.NET',null,'0','1','false'};
        private String[] CountryName_type_info = new String[]{'CountryName','http://www.webserviceX.NET',null,'0','1','false'};
        private String[] apex_schema_type_info = new String[]{'http://www.webserviceX.NET','true','false'};
        private String[] field_order_type_info = new String[]{'CityName','CountryName'};
    }
    public class GetCitiesByCountry_element {
        public String CountryName;
        private String[] CountryName_type_info = new String[]{'CountryName','http://www.webserviceX.NET',null,'0','1','false'};
        private String[] apex_schema_type_info = new String[]{'http://www.webserviceX.NET','true','false'};
        private String[] field_order_type_info = new String[]{'CountryName'};
    }
    public class GetWeatherResponse_element {
        public String GetWeatherResult;
        private String[] GetWeatherResult_type_info = new String[]{'GetWeatherResult','http://www.webserviceX.NET',null,'0','1','false'};
        private String[] apex_schema_type_info = new String[]{'http://www.webserviceX.NET','true','false'};
        private String[] field_order_type_info = new String[]{'GetWeatherResult'};
    }
    public class GetCitiesByCountryResponse_element {
        public String GetCitiesByCountryResult;
        private String[] GetCitiesByCountryResult_type_info = new String[]{'GetCitiesByCountryResult','http://www.webserviceX.NET',null,'0','1','false'};
        private String[] apex_schema_type_info = new String[]{'http://www.webserviceX.NET','true','false'};
        private String[] field_order_type_info = new String[]{'GetCitiesByCountryResult'};
    }
    public class GlobalWeatherSoap {
        public String endpoint_x = 'http://www.webservicex.net/globalweather.asmx';
        public Map<String,String> inputHttpHeaders_x;
        public Map<String,String> outputHttpHeaders_x;
        public String clientCertName_x;
        public String clientCert_x;
        public String clientCertPasswd_x;
        public Integer timeout_x;
        private String[] ns_map_type_info = new String[]{'http://www.webserviceX.NET', 'Searchwether'};
        public String GetCitiesByCountry(String CountryName) {
            Searchwether.GetCitiesByCountry_element request_x = new Searchwether.GetCitiesByCountry_element();
            request_x.CountryName = CountryName;
            Searchwether.GetCitiesByCountryResponse_element response_x;
            Map<String, Searchwether.GetCitiesByCountryResponse_element> response_map_x = new Map<String, Searchwether.GetCitiesByCountryResponse_element>();
            response_map_x.put('response_x', response_x);
            WebServiceCallout.invoke(
              this,
              request_x,
              response_map_x,
              new String[]{endpoint_x,
              'http://www.webserviceX.NET/GetCitiesByCountry',
              'http://www.webserviceX.NET',
              'GetCitiesByCountry',
              'http://www.webserviceX.NET',
              'GetCitiesByCountryResponse',
              'Searchwether.GetCitiesByCountryResponse_element'}
            );
            response_x = response_map_x.get('response_x');
            return response_x.GetCitiesByCountryResult;
        }
        public String GetWeather(String CityName,String CountryName) {
            Searchwether.GetWeather_element request_x = new Searchwether.GetWeather_element();
            request_x.CityName = CityName;
            request_x.CountryName = CountryName;
            Searchwether.GetWeatherResponse_element response_x;
            Map<String, Searchwether.GetWeatherResponse_element> response_map_x = new Map<String, Searchwether.GetWeatherResponse_element>();
            response_map_x.put('response_x', response_x);
            WebServiceCallout.invoke(
              this,
              request_x,
              response_map_x,
              new String[]{endpoint_x,
              'http://www.webserviceX.NET/GetWeather',
              'http://www.webserviceX.NET',
              'GetWeather',
              'http://www.webserviceX.NET',
              'GetWeatherResponse',
              'Searchwether.GetWeatherResponse_element'}
            );
            response_x = response_map_x.get('response_x');
            return response_x.GetWeatherResult;
        }
    }
}
William TranWilliam Tran
You have the get/set 
 public String CountryName{get;set;}
 public String CityName{get;set;}

but then you have public variables also

    public class GetWeather_element {
        public String CityName;
        public String CountryName;

    public class GetCitiesByCountry_element {
        public String CountryName;

Did you ever set the variables using the getter/setters?
 public String CountryName{get;set;}
 public String CityName{get;set;}

Thx