Hi i have the following code taken from a tutorial. Now i wish to return a string called returnString but it won't compile because the string is being accessed from another class.
So how do i return the string
Basically i wish my service to access objects from the application hosting the service.
Thanks.
using System;
using System.Collections.Generic;
using System.Text;
using System.ServiceModel;
namespace Messenger
{
public class ClientService
{
ServiceHost serviceHost;
String returnString = "String I want to return";
public ClientService()
{
}
public void startService()
{
Uri baseUri = new Uri("http://localhost:1234/hello");
serviceHost = new ServiceHost(typeof(HelloService), baseUri);
serviceHost.AddServiceEndpoint(typeof(HelloService), new BasicHttpBinding(), baseUri);
serviceHost.Open();
}
}
[ServiceContract]
class HelloService
{
[OperationContract]
string sayHi()
{
return returnString; // won't compile because in it's own class. So how
}
}
}
Little help plz
sharpMoon
Daikoku
>>this.controlContacts.addMessage(message); // won't compile, how do i get access to my controlContracts object
this refers to the HelloService class and i see no static member controlContacts, so your code doesn't seems to be valid and i don't get exactly what you are trying to achive. Sorry, this doesn't seem to be a WCF issue.
Good luck.
Learning VB
//you can use IExtension<ServiceHostBase> class to share the data between host and service(when you are designing svc,you have to assume,host may add extensions)
SAMPLE CODE:
using
System;using
System.Collections.Generic;using
System.Text;using
System.ServiceModel;using
System.Xml;using
System.Runtime.Serialization;namespace
ConsoleApplication1{
[
ServiceContract] public interface IPhotoGet{
[
OperationContract] string GetPhoto(string name);}
public class PhotoImplement : IPhotoGet{
#region
IPhotoGet Members public string GetPhoto(string name){
MyContext context = OperationContext.Current.Host.Extensions.Find<MyContext>(); return context.m_Name;}
#endregion
}
public class MyContext : IExtension<ServiceHostBase>{
public string m_Name; public int m_Age; public MyContext(string Name, int Age){
m_Name = Name;
m_Age = Age;
}
#region
IExtension<ServiceHostBase> Members public void Attach(ServiceHostBase owner){
//nothing}
public void Detach(ServiceHostBase owner){
//nothing to implement}
#endregion
}
public class Program{
static void Main(string[] args){
ServiceHost svcHost = new ServiceHost(typeof(PhotoImplement)); NetTcpBinding tcpBinding = new NetTcpBinding();tcpBinding.ReceiveTimeout =
new TimeSpan(0, 30, 00);tcpBinding.SendTimeout =
new TimeSpan(0, 30, 00);svcHost.AddServiceEndpoint(
typeof(IPhotoGet), tcpBinding, @"net.tcp://localhost/photo");svcHost.Extensions.Add(
new MyContext("tester",20));svcHost.Open();
Console.WriteLine("service is ready"); Console.ReadLine();}
}
}
WayneSpangler
Okay, what kind of data are you trying to pass from your client to server Here are your options.
1. If you want to pass any .NET buit-in data types then all you need is to pass them as a parameter. For example, if you want to pass a String change your Operation contract as
string sayHi( string data);
All scalar types have implicit DataContract.
2. If you want to pass a custom type then you can
a. Either make them Serializable by annotating with a [SerializableAttribute] or implement ISerializable or
b. Annotate your type with a [DataContractAttribute] and the members that need to be serialized with a [DataMemberAttribute]
Hope this helps.
MSJ17
Ok, how do i do this
using System;
using System.Collections.Generic;
using System.Text;
using System.ServiceModel;
namespace Messenger
{
public class ClientService
{
ControlContacts controlContacts;
ServiceHost serviceHost;
public ClientService(ControlContacts a_controlContacts)
{
this.controlContacts = a_controlContacts;
}
public void startService()
{
Uri baseUri = new Uri("http://localhost:1234/hello");
serviceHost = new ServiceHost(typeof(HelloService), baseUri);
serviceHost.AddServiceEndpoint(typeof(HelloService), new BasicHttpBinding(), baseUri);
serviceHost.Open();
}
public void stopService()
{
serviceHost.Close();
serviceHost = null;
}
}
[ServiceContract]
class HelloService
{
[OperationContract]
string sayHi()
{
return "hi";
}
[OperationContract]
String addMessage(String message)
{
String response = this.controlContacts.addMessage(message); // won't compile, how do i get access to my controlContracts object
return response;
}
}
}
AlbertoV
Or another way, how can i display the data my service receives
I need to transfer data from the service to my aplication. As it is the service is isolated from my app.
arcLee
The object i am trying to get at is this:
Private ControlContacts; // This!!
public ClientService(ControlContacts a_controlContacts)
{
this.controlContacts = a_controlContacts;
}
My appication is holding the data and hosting the service. How can i get the service to access the data
Abualnassr
Code doesn't look correct. Just add the returnString as a private member.
[ServiceContract]
class HelloService
{
String returnString = "String I want to return";
[OperationContract]
string sayHi()
{
return returnString; // won't compile because in it's own class. So how
}
}
fddsfsdf
I see, i thought not compiling was the problem. Here is what i would recommend.
[ServiceContract]
interface IHelloService
{
[OperationContract]
String sayHi();
}
[ServiceBehaviour]
class HelloService :IHelloService
{
String returnString = "String I want to return";
[OperationBehaviour]
string sayHi()
{
return returnString; // won't compile because in it's own class. So how
}
}
//Client code to call the Service without generating proxy via SVCUTIL.EXE and config files
EndPointAddress address = new EndpointAddress("http://localhost:1234/hello");
ChannelFactory<IHelloService> factory = new ChannelFactory<IHelloService>(new BasicHttpBinding(), address);
IHelloService proxy = factory.CreateChannel();
proxy.sayHi()
Fernando Tubio
Those examples are no good to me. I know that info.
I need my last question answered.
As it stands the service is ISOLATED from the application hosting the service.
If i wish to pass data from the application hosting the service to the service itself, how do i do it
Am i missing something It's a simple question.
scuudz
You have my question wrong.
How do i get data IN TO HelloService class I wish to use WCF to send messages between clients. so how do i get my messages to my service
andyedw
using System;
using System.Collections.Generic;
using System.Text;
using System.ServiceModel;
namespace Messenger
{
public class ClientService
{
ControlContacts controlContacts; // I am trying to access this!!!!!!!!!!!!!!!!!
ServiceHost serviceHost;
public ClientService(ControlContacts a_controlContacts)
{
this.controlContacts = a_controlContacts;
}
public void startService()
{
Uri baseUri = new Uri("http://localhost:1234/hello");
serviceHost = new ServiceHost(typeof(HelloService), baseUri);
serviceHost.AddServiceEndpoint(typeof(HelloService), new BasicHttpBinding(), baseUri);
serviceHost.Open();
}
public void stopService()
{
serviceHost.Close();
serviceHost = null;
}
}
[ServiceContract]
class HelloService
{
[OperationContract]
string sayHi()
{
return "hi";
}
[OperationContract]
String addMessage(String message)
{
String response = this.controlContacts.addMessage(message); // won't compile, how do i get access to my controlContracts object
return response;
}
}
}
matthew lyden
I think you have my question wrong. I wish my service to access data from my application not from the service itself.
How do i pass in data to the service so my client can connect and receive this data.
uksuv
all our SDK samples are transfering data between client and service and service and client,please check SDK samples
http://windowssdk.msdn.microsoft.com/en-us/library/ms750530.aspx
http://windowssdk.msdn.microsoft.com/en-us/library/ms751519.aspx
-Thank you
Madhu