webservices: simple question, accessing webservice members

[hellrazor]

Hi, (new to webservices here)

Is it possible to access a class instance variable defined in a webservice?
I want to access this variable, in addition to the data being returned by
the [webmethod].

so let's say I have the following webservice class:


public class Service1 : System.Web.Services.WebService
{

public string hello2;

public ModelServices()
{
InitializeComponent();
}

[WebMethod]
public string sayHello()
{
hello2 = "another hello to you!"
return "hello there";
}
}


................................

So when I consume this webservice, I want to be able to call the sayHello()
method, and have access to the hello2 variable after having called sayHello
() and thus expecting the "hello2" variable to contain the "another hello
to you!" value:


remoteWS.Service1 ws = new remoteWS.Service1();
string hello1 = ws.sayHello();
string hello2 = ws.hello2;



Is this possible, and how do I go about doing it? thanks!

 

[Hayato Iriumi]

I don't think you can access a public member of
System.Web.Services.WebService class from a client side. I would either
stored the value in database or use Session in the web service.

Good luck!

============================
Hayato Iriumi ([email protected])
Blog: http://www.vbaspcoder.com

 

[Nick Malik]

you can either add another webmethod to return the new value (which is
chatty and inefficient) or you can return a class that contains both values.

For example:

public class SharedClass
{
string MyHello1;
string MyHello2;
}

public class Service1: System.Web.Services.WebService
{
// put initializer here... ommitted for brevity
[WebMethod]
public SharedClass SayHello()
{
SharedClass sc = new SharedClass();
sc.MyHello1 = "Hello There";
sc.MyHello2 = "And Again";
}
}

public class WebClient
{
public void MyClient()
{
Service1 mywebservice;
mywebservice.SayHello();
Console.WriteLine("{0}", mywebservice.MyHello1);
Console.WriteLine("{0}", mywebservice.MyHello2);
}
}

((Caveat: this code is from the top of my head... it has not been
compiled... please excuse typos))

Hope this helps,
--- Nick

 

[Nick Malik]

I screwed up a bit of that code.

Please replace the client class as follows:

public void MyClient()
{
Service1 mywebservice;
SharedClass myShared;
myShared = mywebservice.SayHello();
Console.WriteLine("{0}", myShared.MyHello1);
Console.WriteLine("{0}", myShared.MyHello2);
}

Sorry about that.

--- Nick

you can either add another webmethod to return the new value (which is
chatty and inefficient) or you can return a class that contains both values.

For example:

public class SharedClass
{
string MyHello1;
string MyHello2;
}

public class Service1: System.Web.Services.WebService
{
// put initializer here... ommitted for brevity
[WebMethod]
public SharedClass SayHello()
{
SharedClass sc = new SharedClass();
sc.MyHello1 = "Hello There";
sc.MyHello2 = "And Again";
}
}

public class WebClient
{
public void MyClient()
{
Service1 mywebservice;
mywebservice.SayHello();
Console.WriteLine("{0}", mywebservice.MyHello1);
Console.WriteLine("{0}", mywebservice.MyHello2);
}
}

((Caveat: this code is from the top of my head... it has not been
compiled... please excuse typos))

Hope this helps,
--- Nick

Hi, (new to webservices here)

Is it possible to access a class instance variable defined in a webservice?
I want to access this variable, in addition to the data being returned by
the [webmethod].

so let's say I have the following webservice class:


public class Service1 : System.Web.Services.WebService
{

public string hello2;

public ModelServices()
{
InitializeComponent();
}

[WebMethod]
public string sayHello()
{
hello2 = "another hello to you!"
return "hello there";
}
}


...............................

So when I consume this webservice, I want to be able to call the sayHello()
method, and have access to the hello2 variable after having called sayHello
() and thus expecting the "hello2" variable to contain the "another hello
to you!" value:


remoteWS.Service1 ws = new remoteWS.Service1();
string hello1 = ws.sayHello();
string hello2 = ws.hello2;



Is this possible, and how do I go about doing it? thanks!

 

[hellrazor]

I screwed up a bit of that code.

Please replace the client class as follows:

public void MyClient()
{
Service1 mywebservice;
SharedClass myShared;
myShared = mywebservice.SayHello();
Console.WriteLine("{0}", myShared.MyHello1);
Console.WriteLine("{0}", myShared.MyHello2);
}

Sorry about that.

--- Nick

you can either add another webmethod to return the new value (which is
chatty and inefficient) or you can return a class that contains both values.

For example:

public class SharedClass
{
string MyHello1;
string MyHello2;
}

public class Service1: System.Web.Services.WebService
{
// put initializer here... ommitted for brevity
[WebMethod]
public SharedClass SayHello()
{
SharedClass sc = new SharedClass();
sc.MyHello1 = "Hello There";
sc.MyHello2 = "And Again";
}
}

public class WebClient
{
public void MyClient()
{
Service1 mywebservice;
mywebservice.SayHello();
Console.WriteLine("{0}", mywebservice.MyHello1);
Console.WriteLine("{0}", mywebservice.MyHello2);
}
}

((Caveat: this code is from the top of my head... it has not been
compiled... please excuse typos))

Hope this helps,
--- Nick

Hi, (new to webservices here)

Is it possible to access a class instance variable defined in a webservice?
I want to access this variable, in addition to the data being

returned

by

the [webmethod].

so let's say I have the following webservice class:


public class Service1 : System.Web.Services.WebService
{

public string hello2;

public ModelServices()
{
InitializeComponent();
}

[WebMethod]
public string sayHello()
{
hello2 = "another hello to you!"
return "hello there";
}
}


...............................

So when I consume this webservice, I want to be able to call the sayHello()
method, and have access to the hello2 variable after having called sayHello
() and thus expecting the "hello2" variable to contain the "another hello
to you!" value:


remoteWS.Service1 ws = new remoteWS.Service1();
string hello1 = ws.sayHello();
string hello2 = ws.hello2;



Is this possible, and how do I go about doing it? thanks!

Hi there, thanks!

When I try to compile the client application in VS, I get the following
error:

C:\clients\test.cs(1070): Cannot implicitly convert type
'WS.ReturnValuesClass' to 'MyApp.ReturnValuesClass'


I have placed the class in the source code for both the webservice and
the client. Is there anything specific involved that I have missed?

Thanks!

Jorge

 

[Nick Malik]

Hi there, thanks!

When I try to compile the client application in VS, I get the following
error:

C:\clients\test.cs(1070): Cannot implicitly convert type
'WS.ReturnValuesClass' to 'MyApp.ReturnValuesClass'


I have placed the class in the source code for both the webservice and
the client. Is there anything specific involved that I have missed?

Thanks!

Jorge

Hi Jorge,

That's what I get for not compiling the code first. My apologies.

The shared class should NOT be declared again in the client code. The
definition of the shared class is passed via the WSDL and is coded in the
web service generated code. You can simply declare a variable of type
WS.ReturnValuesClass and refer to the members that way.

If you want to see the code the Visual Studio generates for you when you
make a web reference, then look carefully at your project explorer window.
There are a couple of small icons in the bar just above the treeview of your
solution and project(s). One of the icons, if you hover over it, says
something like "show all files". Click it. Then look into the client
project. You will see a new code file under the web reference to the web
service. In there, you will see the definition of the shared class.

Good Luck,
--- Nick