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c# : Can web methods be overloaded ?
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 [quoted text, click to view] "john bailo" <jbailo@vestcom.com> wrote in message news:d6f4ae938304a93af0d7bec2731ddcc3@news.teranews.com... > > 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 [quoted text, click to view] "john bailo" <jbailo@vestcom.com> wrote in message news:f7a5f8a3b75ce6503ea6941370e983f6@news.teranews.com... > 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:%230EXMzqkDHA.3504@TK2MSFTNGP11.phx.gbl... > > 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" <jbailo@vestcom.com> wrote in message > > news:d6f4ae938304a93af0d7bec2731ddcc3@news.teranews.com... > > > > > > Can a web method be overloaded? > > > > > > To support varying numbers of input parameters? > > > > > > > > > > > > > > >
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? [quoted text, click to view] "Greg Ewing [MVP]" <gewing@_NO_SPAM_gewing.com> wrote in message news:%230EXMzqkDHA.3504@TK2MSFTNGP11.phx.gbl... > 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" <jbailo@vestcom.com> wrote in message > news:d6f4ae938304a93af0d7bec2731ddcc3@news.teranews.com... > > > > Can a web method be overloaded? > > > > To support varying numbers of input parameters? > > > > > > > >
Greg Ewing [MVP] dribbled:
[quoted text, click to view] > john, the client will have to use Add2. Is that 'overloaded' then? Isn't that just the same as two methods?
Chris Taylor dribbled:
[quoted text, click to view] > 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.
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 [quoted text, click to view] "john bailo" <jbailo@vestcom.com> wrote in message news:d6f4ae938304a93af0d7bec2731ddcc3@news.teranews.com... > > Can a web method be overloaded? > > To support varying numbers of input parameters? > > >
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 [quoted text, click to view] "Burgess Meredith" <jabailo@earthlink.net> wrote in message news:4a5e602a3e4031a9d08092d663967edb@news.teranews.com... > 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? > > >
[quoted text, click to view]
Burgess Meredith wrote: You can easily handle this by making the web method accept a XMLDocument > 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. > > 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 ! [quoted text, click to view] "Chris Taylor" <chris_taylor_za@hotmail.com> wrote in message news:evB9o4qkDHA.2080@TK2MSFTNGP10.phx.gbl... > 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" <jbailo@vestcom.com> wrote in message > news:d6f4ae938304a93af0d7bec2731ddcc3@news.teranews.com... > > > > Can a web method be overloaded? > > > > To support varying numbers of input parameters? > > > > > > > >
Hi Bubba,
Thanks for posting to the newsgroup. From the error message, it appears as though you're trying to create an "overloaded" constructor for your web method. Is this really what you want to do? - bliz -- Jim Blizzard, MCSD .NET Community Developer Evangelist | http://www.microsoft.com/communities Microsoft Your Potential. Our Passion. This posting is provided as is, without warranty, and confers no rights. [quoted text, click to view] "Bubba Thomas" <bubba@ILU.com> wrote in message news:ulNtCv3sDHA.3140@TK2MSFTNGP11.phx.gbl... > 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" <chris_taylor_za@hotmail.com> wrote in message > news:evB9o4qkDHA.2080@TK2MSFTNGP10.phx.gbl... > > 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" <jbailo@vestcom.com> wrote in message > > news:d6f4ae938304a93af0d7bec2731ddcc3@news.teranews.com... > > > > > > Can a web method be overloaded? > > > > > > To support varying numbers of input parameters? > > > > > > > > > > > > > > >
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