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.NET Forum / ASP.NET / Web Services / February 2005Trying to return a C# Class that conforms to a schema
Hello. I'm missing something, I just know it. I'm writing a web service and I'm new at this. Scenario: I got a Request and a Response XSD from a business partner. I used XSD.exe to generate the C# classes. I created a C# ASP Web Application. I added the generated classes to the project. I then created a WebMethod whose return type is the generated class that corresponds to the Response root element. I created variables for each generated class, initialized each instance, and tried to to return the "root" class instance (just to see if the XML generated corresponds to the Response schema), but get an error. I posted the error in a previous posting. Basically it looks like the runtime is compiling something, giving it a random name, and then cannot find it. So, at this point I don't know how to structure my project, I don't know what the generated classes are good for (I thought I did) because based on the error I'm misusing them, and I don't know how to return my user defined class so that it corresponds to the schema. Now, I've been all over MSDN, Googled, MSN Searched (Google is still better at this point), went to Border's Books and read through everything they have, and all I can find about WebServices are simple examples that return "string, int, double". Really, nothing more than "Hello World" examples. If "http://tempuri.org" is satisfactory for someone then it's no wonder everyone says they're so simple to create. But that's not reality. Where are the sample projects that show the structure of a solution that does what I need to do? I know I'm not alone in the universe! What am I missing? Do I need to use SOAP in some way? Someone please point me in the right direction. Thanks in advance, Mike In ASP.Net, web services generally can only return value types and some serializable object classes that Microsoft has chosen to implement the code for. For instance, they can return a DataSet, because Microsoft implemented it, but they cannot return a DataTable. If you add an instance of the XMLInclude attribute to your return type class and to each class that your return type references, that will often solve the problem. Hope this helps, DalePres MCAD, MCDBA, MCSE > Hello. > [quoted text clipped - 39 lines] > > Mike Hello DalePres, I think what you're probably having a problem with is the return type attributes... try using an attribute like this in your web method [return : XmlElement("name-of-the-xml-element", Namespace="namespace-from-the-generated-class")] [WebMethod] public GeneratedClass SomeMethod() { return GeneratedClassInstance; } HTH Regards, Dilip Krishnan MCAD, MCSD.net dkrishnan at geniant dot com http://www.geniant.com > In ASP.Net, web services generally can only return value types and > some serializable object classes that Microsoft has chosen to [quoted text clipped - 59 lines] >> >> Mike Hi, Dilip. Thanks for responding. Let me ask you, where is the documentation on the "[result:" attribute? I cannot find it anywhere. This is what I was talking about when I said "I know I'm missing something". Thanks again, Mike > Hello DalePres, > I think what you're probably having a problem with is the return type [quoted text clipped - 77 lines] >>> >>> Mike Hello Mike, http://msdn.microsoft.com/library/default.asp?url=/library/en-us/csspec/html/vcl rfcsharpspec_17_2.asp HTH Regards, Dilip Krishnan MCAD, MCSD.net dkrishnan at geniant dot com http://www.geniant.com > Hi, Dilip. Thanks for responding. > [quoted text clipped - 88 lines] >>>> >>>> Mike Thanks Dilip. The mystery is gone. Is there a VB.Net equivalent of these attributes? Thanks again, Mike > Hello Mike, > http://msdn.microsoft.com/library/default.asp?url=/library/en-us/csspec/html/vcl rfcsharpspec_17_2.asp [quoted text clipped - 97 lines] >>>>> >>>>> Mike Hello MikeL, After the *As* Public Function SomeFunction(<System.Xml.Serialization.XmlElementAttribute([Namespace]:="http://someuri")> ByVal SomeClass As someclass) As <System.Xml.Serialization.XmlElementAttribute("SomeReturn", [Namespace]:="http://someuri")> SomeReturnType End Function HTH Regards, Dilip Krishnan MCAD, MCSD.net dkrishnan at geniant dot com http://www.geniant.com > Thanks Dilip. The mystery is gone. > [quoted text clipped - 121 lines] >>>>>> >>>>>> Mike I'm guessing after all of these responses, you're still stuck. This not being able to find the compiled serializer tells me there's a permissions problem. Did you change the identity or restrict the permissions of the .NET runtime? The XSD.exe tool already adds the appropriate markup to the generated classes, so you don't have to do (usually) the XMLInclude and returns: markup. That is used to serialze when no Xml*Attribute markup has been added to the types you want to serialize. -------------------- >Message-ID: <306392632434120830543216@msnews.microsoft.com> >From: Dilip Krishnan <dkrishnan@NOSPAM.geniant.com> [quoted text clipped - 9 lines] >Lines: 1 >Path: cpmsftngxa10.phx.gbl!TK2MSFTNGXA01.phx.gbl!TK2MSFTNGP08.phx.gbl!tk2msftngp13 .phx.gbl >Xref: cpmsftngxa10.phx.gbl microsoft.public.dotnet.framework.aspnet.webservices:28001 >X-Tomcat-NG: microsoft.public.dotnet.framework.aspnet.webservices > [quoted text clipped - 3 lines] > >Public Function SomeFunction(<System.Xml.Serialization.XmlElementAttribute([Namespace]:="htt p://someuri")> >ByVal SomeClass As someclass) As <System.Xml.Serialization.XmlElementAttribute("SomeReturn", >[Namespace]:="http://someuri")> SomeReturnType [quoted text clipped - 132 lines] >>>>>>> >>>>>>> Mike Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. 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