When I add a service reference to a WCF web service in my current ASP.net MVC 3 project, proxy classes are successfully generated, but there's no information added to web.config. This results in an error when I attempt to instantiate the proxy class using the no-args constructor. On this line:
var proxy = new ReportingService.ApiServiceClient();
I get the following runtime exception:
Could not find default endpoint element that references contract
'ReportingService.IApiService' in the ServiceModel client configuration
section. This might be because no configuration file was found for your
application, or because no endpoint element matching this contract could
be found in the client element.
This makes sense because there's absolutely nothing in my config file indicating the default endpoint.
What am I missing? Why would adding the service reference fail to create a default endpoint?
Related
Am trying to invoke a CMIS repository webservice URL from a WCF service. I need to ensure that I have WCF binding (basicHttp) on invoking that webservice (to mutually exchange certificates between client and Data power). Hence i used the below code:
DotCMIS - Code Snippet:
Parameters[SessionParametet.WebServicesWCFBinding] = "myWCFServiceBindingName";
Note: "myWCFServiceBindingName" is the name of basicHttpBinding defined in the web.config related to the WCF service.
There is no error when the above code is executed but it throws the below error message when instantiating a session to perform operations on the repository.
Error Message:
No elements matching the key 'myWCFServiceBindingName' were found in the configuration element collection.
Could someone share your thoughts on this issue ?
I'm building a workflow that uses a WCF service .. but in the workflow project I didn't add a direct reference to the WCF service, instead I've added a reference to a project that has this service reference, but now the designer isn't opening and it's giving me the following exception error:
System.Xaml.XamlObjectWriterException: 'The invocation of the constructor on type 'OrderingSystemWorkFlow.RegisterOrderBill' that matches the specified binding constraints threw an exception.' Line number '25' and line position '34'. ---> System.InvalidOperationException: Could not find default endpoint element that references contract 'ServiceReference1.IService1' in the ServiceModel client configuration section. This might be because no configuration file was found for your application, or because no endpoint element matching this contract could be found in the client element.
How to solve this?
Why not add a direct Service Reference to your WF project?
When you add service reference of a wcf service in a activity library its turn into an activity and can drag drop on workflow. When you add service reference a config file is also added, copy the content of the config file basically that has a client and binding config section.
Please refer this link.
http://blogs.msdn.com/b/endpoint/archive/2010/12/08/how-to-consume-a-wcf-service-from-a-wf4-workflow.aspx.
I am working on a Base WCF Service- Client WCF service - Consumer Base Wcf servcie model as following:
In this model, I have created a Base WCF service and created 1 WCF service i.e; ClientWCFService and 1 ASMX service i.e; ClientASMXservice using the BaseWCFServiceProxy.cs the Proxy class of Base WCF Service using SVCUtil.exe.
The ClientWCFService and ClientASMXservice are working fine in StandAlone environment.
Now, I created a Consumer Console Application using the same proxy class BaseWCFServiceProxy.cs to access both of the ClientWCFService and ClientASMXservice using the BaseWcfService class.
As per the OOP rules, BaseWcfService class is the base class for the ClientWCFService and ClientASMXservice and i can access these Services using the Base service class constructor.
The service calls are as following:
for ClientWCFService
ModelWcfServiceContractClient _client = new ModelWcfServiceContractClient("IModelWcfServiceContract","http://localhost:64242/ClientWCFServiceWcfUsingSVCProxy.svc");
for ClientASMXservice
ModelWcfServiceContractClient _client = new ModelWcfServiceContractClient("IModelWcfServiceContract","http://localhost:64396/ClientASMXServiceWcfUsingSVCProxy.asmx");
The Consumer Console application is building fine, but at run time while initializing the ModelWCFServiceContractClient object,
it throws the InvalidOperation Exception as :
Could not find endpoint element with name 'IModelWcfServiceContract'
and contract 'IModelWcfServiceContract' in the ServiceModel client
configuration section. This might be because no configuration file was
found for your application, or because no endpoint element matching
this name could be found in the client element.
I have tried using different endpoints for every type of service to resolve this issue but could not get success.
A faster response would be Appreciated. Also please don't help me by just clearing spelling mistakes because it will waste my time to read the Alert that would be generated due to the clearing spell mistakes. Time is critical for me..
Thanks
Try this (hopefully you can follow):
In Visual Studio, Select the project that contains the ServiceReference for your ModelWcfProxy (the one that generated the ModelWcfServiceContractClient proxy class).
Choose, "Show all files" from the Solution Explorer menu bar.
Expand the Service References folder and the generated Service Reference. Find the .svcmap file, look underneath to find the Reference.cs file.
On the top of your generated interface there should be a System.ServiceModel.ServiceContractAttribute defined. In the attribute constructor, you should see a ConfigurationName property being set. This contract configuration name should match the name defined in config or that you are sending in to your method:
ModelWcfServiceContractClient _client = new ModelWcfServiceContractClient("IModelWcfServiceContract","http://localhost:64242/ClientWCFServiceWcfUsingSVCProxy.svc");
Hope this helps.
I am trying to consume a WCF web service from a .NET client application, and I think I need to be able to programmatically create endpoints, but I don't know how. I think I need to do this because, when I try to run the application, I am getting the following error:
Could not find default endpoint
element that references contract
'IEmailService' in the ServiceModel
client configuration section. This
might be because no configuration file
was found for your application, or
because no endpoint element matching
this contract could be found in the
client element.
While troubleshooting this error, I created a simple windows forms application, in which I try to consume the same web service. With this test application I can connect to the web service successfully, and I get a valid response. But, I can reproduce the exact error cited above within in my test app by removing the system.serviceModel node and all of its child nodes from the application's app.config file (I might not have to remove ALL of that section, I'm not sure). So, my first thought was that I need to add that section to the app.config file for the real app, and everything should be fine. Unfortunately, for ridiculous reasons that I won't get into here, that is not an option. So, I am left with having to generate this information in code, inside the client app.
I am hoping someone here can help me work through this, or can point me toward a good resource for this sort of problem.
Is it possible to create endpoint configurations in the client app, in code?
By default, when you do an Add Service Reference operation, the WCF runtime will generate the client-side proxy for you.
The simplest way to use it is to instantiate the client proxy with a constructor that takes no parameters, and just grab the info from the app.config:
YourServiceClient proxy = new YourServiceClient();
This requires the config file to have a <client> entry with your service contract - if not, you'll get the error you have.
But the client side proxy class generated by the WCF runtime also has additional constructors - one takes an endpoint address and a binding, for instance:
BasicHttpBinding binding = new BasicHttpBinding(SecurityMode.None);
EndpointAddress epa = new EndpointAddress("http://localhost:8282/basic");
YourServiceClient proxy = new YourServiceClient(binding, epa);
With this setup, no config file at all is needed - you're defining everything in code. Of course, you can also set just about any other properties of your binding and/or endpoint here in code.
An east way to consume a WCF service if you have a reference to the assembly which defines the interface, is using the System.ServiceModel.ChannelFactory class.
For example, if you would like to use BasicHttpBinding:
var emailService = ChannelFactory<IEmailService>.CreateChannel(new BasicHttpBinding(), new EndpointAddress(new Uri("http://some-uri-here.com/));
If you don't have a reference to the service assembly, then you can use one of the overloaded constructors on the generated proxy class to specify binding settings.
I have a Silverlight application communicating with the server side through WCF services. Initially I had everything in the main Silverlight application, but now I wanted to factor our some classes to a separate Silverlight Class Library project. This however gave me some odd issues...
I wanted to factor the classes that does the WCF communication out to a separate project. So I:
Created a new project; Silverlight class library
Moved the classes from my Silverlight application to my Silverlight class library
Removed the Service reference in the application as I no longer call it from the app.
Added a Service reference from the class library project.
Now - compiling is fine and I get intellisense for the service stuff in the Class Library, so it seems to be fine. I also updated the service and got the updates in the Class Library.
But when running the application it fails when doing a service call giving the following error:
InvalidOperationException was unhandled by user code
Could not find default endpoint element that references contract 'MyServiceReference.IMyService' in the ServiceModel client configuration section. This might be because no configuration file was found for your application, or because no endpoint element matching this contract could be found in the client element.
Seems like it can't find the service, but why? I assume there should be no problem to have service references from a Silverlight Class Library as it allows me to add one?
IT can't find any service configuration - where do you have the config for the WCF service? By default, the client app (the EXE) will have a app.config that contains the service endpoints to connect to.
Also by default, class libraries (DLL's) don't have their own configuration but rely on their hosting app to provide the configuration for them.
So all in all - you're probably missing the config for the client endpoint. Most likely, it has been created as an app.config in the class library project, but that's not being used, really - you'll have to move the <system.serviceModel> section up to the main app's config (I'm not fluent in Silverlight, but you'll know where to put it).
Marc