I have a WinForm client that its using WCF DataServices. I would like to know if WCF DataServices has some kind of BeforeSendRequest and AfterSendRequest so I can show on the UI an icon that some database request its running.
Any clue?
Thanks
Unfortunately WCF doesn't have anything like Global.asax where we can handle BeginRequest and EndRequest
Based on your question, I guess the interface IClientMessageInspector will be handy.
The methods to be implemented will be BeforeSendRequest and AfterReceiveReply. I guess these are the two events you are looking for.
The documentation regarding this is available in the following msdn link
http://msdn.microsoft.com/en-us/library/system.servicemodel.dispatcher.iclientmessageinspector.aspx
In short, you will have to implement the IClientMessageInspector( part of System.ServiceModel.Dispatcher) and also implement IEndpointBehavior (part of System.ServiceModel.Description) to hook the inspector on to the client endpoint. And thus change the configuration in the client endpoint to refer the endpoint behaviour that was added.
Related
I'd like to access a WCF method via url. For example:
localhost:8080/TestService.svc/MyMethod
When I do the above, I get a webpage cannot be found. In the Interface file, I have added the following above MyMethod.
[WebGet]
[OperationContract]
void MyMethod();
but that didn't change anything. Any ideas?
How does your web.config look like? Are you using REST?
Have you looked at below post?
Making a WCF Web Service work with GET requests
I don't think you can. You need to use REST to do what you want.
Or use a Controller/Action (if this is MVC) that will create a proxy object to consume the service e.g.
ServiceClient client = new ServiceClient();
client.MyMethod()
Here is a nice example on how to achieve this
I think the quickest solution is to use a factory. It seems likely they would want a restful service so if you follow this guide you wont even need to specify anything in the web.config. See the first answer on this question.
Bare Minimum Configuration for RESTful WCF
Hallo again my question regards to event based model client development in WCF service client infrastructure. what I would lice to know is that, instead of using ClientBase is it possible to manually implement this patten with ChannelFactory so for example I could write GetDataAsync for client access and still using ChannelFactory and implementing serverside async calls here?
The answer will depend on whether you control the service contract or not. If you can define the service contract then you add the appropriate begin/end methods that return/use the IAsyncResult as shown in the code in this blog post.
If you can't change the service contract then you must create an async version of the service contract manually and feed that to the ChannelFactory. The ChannelFactory itself does not provide an async mode of service operation invocation. Your code will end up looking something like the code in this MSDN sample.
How we use CallBack in WCF fluently with events and delegates?
If Client give any request or any conditions matches of client then services automatically fire the event which condition or request given from client.
how is it possible?
A cleaner model is an event driven one using a Publish/Subscribe Pattern.
Read this to get inside onto both methods.
http://msdn.microsoft.com/en-us/magazine/cc163537.aspx
You basically define a service method as one-way and also create a message callback. See more here: http://idunno.org/archive/2008/05/29/wcf-callbacks-a-beginners-guide.aspx
I'm currently working on a WCF service that reaches out to another service to submit information in a few of its operations. The proxy for the second service is generated through the strongly typed ProxyFactory<T> class. I haven't experienced any issues but have heard I should do something like the following when making the call:
using (new OperationContextScope((IContextChannel)_service))
_service.Send(message);
So my question is: when is creating this new OperationContextScope appropriate, and why?
Thanks!
If you are using callbacks or if you want to modify the message or headers then you need to use OperationContextScope. Your service might need to modify outgoing headers while calling that another service.
When you establish OperationContextScope then you can:
Access and modify incoming and outgoing message headers and other properties.
Access the runtime, including dispatchers, the host, channel, and extensions.
Access other types of contexts, such as security, instance, and request contexts.
Access the channel associated with the OperationContext object or (if the channel implements System.ServiceModel.Channels.ISession) the associated channel's session identifier.
The other service which you call, is it a session-based service? Probably you need to look at its sample client code or documentation if available.
I'm using .NET 2.0 web services. If I add a reference to a WSDL and make a proxy class method call, what's the easiest way in VS to see the SOAP being sent?
Example, I added the PayPal WSDL Web Service Reference and made a call as so:
PayPalAPIAASoapBinding _client = new PayPalAPIAASoapBinding();
...rest of code and then
SetExpressCheckoutResponseType checkoutResponse = new SetExpressCheckoutResponseType();
checkoutResponse = _client.SetExpressCheckout(request); // makes the call here
I tried setting a debug point on line 2 but not sure how to dive in to see the SOAP. Obviously I could use something like Fiddler but want to just use Intellisense during debugging to drill down to the object that has the request. I would assume client would have it, my instance above but could not find it. Client is an instance of the PayPal Service.
I do see when I drill down into the base class PayPalAPIAASoapBinding that there is a version property but I can't get the value for this:
System.Web.Services.Protocols.SoapProtocolVersion.Default
when I try to paste that into my watch window, the value just shows the word Default not the true value that's sent. So this is why I need to look at the SOAP and so far in that binding object I don't see a property holding it. But it's gotta be somewhere in any requests you make in a web service in .NET, just don't know where to look during debug?
My end goal here is to be able to read the SOAP envelop before it's being sent really using any WSDL reference in VS.
There's no very easy way. See the example in the SoapExtension documentation on MSDN for a way to log the information.
If you were using WCF, you could just turn on logging in the configuration.
The easiest way to see the SOAP messages (regardless of the programming language) is to use a tool like SoapUI or TCPmon which lets you intercept send and received messages.
This is very easy (if the SOAP is not encrypted). Although it is not in VS.
The easiest way is to use the Fiddler. You can let your VS make Soap calls and see the traffic in raw view on the Fiddler. If the Soap calls are made over SSL, there are some extra steps that needs to be taken for Fiddler to trace them.