Can a web method be overloaded?

To support varying numbers of input parameters?

john, yes you can but you need to specify the MessageName attribute though
as an alias for the WSDL. Here's an example.

<%@ WebService Language="C#" Class="Calculator" %>

using System;
using System.Web.Services;

public class Calculator : WebService {
// The MessageName property defaults to Add for this XML Web service
method.
[WebMethod]
public int Add(int i, int j) {
return i + j;
}
[WebMethod(MessageName="Add2")]
public int Add(int i, int j, int k) {
return i + j + k;
}
}

--
Greg Ewing [MVP]
http://www.citidc.com


"john bailo" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
>
> Can a web method be overloaded?
>
> To support varying numbers of input parameters?
>
>
>

if I want to use 3 parameters,

when I call the method from a client,

do I use Add or Add2 as my method?

Or is an 'alias' just a 'cosmetic' name for the overloaded
Add function?

"Greg Ewing [MVP]" <gewing@_NO_SPAM_gewing.com> wrote in message
news:%(E-Mail Removed)...
> john, yes you can but you need to specify the MessageName attribute though
> as an alias for the WSDL. Here's an example.
>
> <%@ WebService Language="C#" Class="Calculator" %>
>
> using System;
> using System.Web.Services;
>
> public class Calculator : WebService {
> // The MessageName property defaults to Add for this XML Web service
> method.
> [WebMethod]
> public int Add(int i, int j) {
> return i + j;
> }
> [WebMethod(MessageName="Add2")]
> public int Add(int i, int j, int k) {
> return i + j + k;
> }
> }
>
> --
> Greg Ewing [MVP]
> http://www.citidc.com
>
>
> "john bailo" <(E-Mail Removed)> wrote in message
> news:(E-Mail Removed)...
> >
> > Can a web method be overloaded?
> >
> > To support varying numbers of input parameters?
> >
> >
> >
>
>

john, the client will have to use Add2.

--
Greg Ewing [MVP]
http://www.citidc.com

"john bailo" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> if I want to use 3 parameters,
>
> when I call the method from a client,
>
> do I use Add or Add2 as my method?
>
> Or is an 'alias' just a 'cosmetic' name for the overloaded
> Add function?
>
> "Greg Ewing [MVP]" <gewing@_NO_SPAM_gewing.com> wrote in message
> news:%(E-Mail Removed)...
> > john, yes you can but you need to specify the MessageName attribute
though
> > as an alias for the WSDL. Here's an example.
> >
> > <%@ WebService Language="C#" Class="Calculator" %>
> >
> > using System;
> > using System.Web.Services;
> >
> > public class Calculator : WebService {
> > // The MessageName property defaults to Add for this XML Web service
> > method.
> > [WebMethod]
> > public int Add(int i, int j) {
> > return i + j;
> > }
> > [WebMethod(MessageName="Add2")]
> > public int Add(int i, int j, int k) {
> > return i + j + k;
> > }
> > }
> >
> > --
> > Greg Ewing [MVP]
> > http://www.citidc.com
> >
> >
> > "john bailo" <(E-Mail Removed)> wrote in message
> > news:(E-Mail Removed)...
> > >
> > > Can a web method be overloaded?
> > >
> > > To support varying numbers of input parameters?
> > >
> > >
> > >
> >
> >
>
>

Hi,

No Web Service methods can not be overloaded. If you want to expose an
overloaded class method, you will have to provide a alias using the
MessageName property of the WebMethodAttribute.

C# : [WebMethod( MessageName="GetCustomerByID" )]

VB.NET <WebMethod( MessageName := "GetCustomerByID)>

Hope this helps

Chris Taylor

"john bailo" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
>
> Can a web method be overloaded?
>
> To support varying numbers of input parameters?
>
>
>

Greg Ewing [MVP] dribbled:

> john, the client will have to use Add2.

Is that 'overloaded' then?

Isn't that just the same as two methods?

Chris Taylor dribbled:

> Hi,
>
> No Web Service methods can not be overloaded. If you want to expose an

ok, so the benefits of overloading
are lost when calling a web method.

to me, that's a shame, because the ability
to send varying numbers of parameters and
parameter types to the same method would be
really valuable for a remote client, talking
to a web method.

if you think http post, there may be several
uses of the same function but with different
UI's that would want to use the method.

Burgess, in terms of the server code, yes, it's overloading. In terms of
the client, no, it's not. Unfortunately that's a limitation of WSDL.

http://www.w3.org/TR/wsdl

--
Greg Ewing [MVP]
http://www.citidc.com


"Burgess Meredith" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> Greg Ewing [MVP] dribbled:
>
> > john, the client will have to use Add2.
>
> Is that 'overloaded' then?
>
> Isn't that just the same as two methods?
>
>
>

Burgess Meredith wrote:

> Chris Taylor dribbled:
>
>
>>Hi,
>>
>>No Web Service methods can not be overloaded. If you want to expose an
>
>
> ok, so the benefits of overloading
> are lost when calling a web method.
>
> to me, that's a shame, because the ability
> to send varying numbers of parameters and
> parameter types to the same method would be
> really valuable for a remote client, talking
> to a web method.
>
> if you think http post, there may be several
> uses of the same function but with different
> UI's that would want to use the method.
>
>
You can easily handle this by making the web method accept a XMLDocument
as input rather than explicit parameters. They you would have control
over the kind of stuff you can get into that web method and you would
need to overload methods.

Of course, this would mean that you now have to write code to
de-serialize XML document to a real object. But that is a *good* thing.


--
Girish Bharadwaj

Chris,

I tried your VB.NET version but it does not work. Firstly, I think you
forgot the closing " after GetCustomerByID but I get the following error !


Attribute "WebMethodAttribute" cannot be applied to '.ctor' because the
attribute is not valid on this attribute type.


Any ideas ?


ThanX !

Bubba !



"Chris Taylor" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> Hi,
>
> No Web Service methods can not be overloaded. If you want to expose an
> overloaded class method, you will have to provide a alias using the
> MessageName property of the WebMethodAttribute.
>
> C# : [WebMethod( MessageName="GetCustomerByID" )]
>
> VB.NET <WebMethod( MessageName := "GetCustomerByID)>
>
> Hope this helps
>
> Chris Taylor
>
> "john bailo" <(E-Mail Removed)> wrote in message
> news:(E-Mail Removed)...
> >
> > Can a web method be overloaded?
> >
> > To support varying numbers of input parameters?
> >
> >
> >
>
>