I'm new in wcf.
I am server and want to give 'ID' parameter, and get string type data from my client fro that ID.
Can anybody help me, how I can organize it, or where to look some samples ?
This is the getting started tutorial on WCF:
http://msdn.microsoft.com/en-us/library/ms734712.aspx
Feel free to post a more specific question after you gone through the basics of creating and consuming a WCF service. Good luck!
Related
OK, I've searched the Internet for the answer to this and haven't found anything... maybe I'm missing the obvious here or just asking the wrong question, but...
How do you call a WF WCF Workflow just by it's URL with parameters? I have a Workflow xmlx, we'll call it DeepThought.xamlx, an operation named TheQuestion and I need to pass the parameter Answer = 42 to it.
I've tried http://localhost:8042/DeepThought.xamlx/TheQuestion?Answer=42 and just about everything else I can think of. I've scoured the Internet and even the wsdl but am either just flat out missing the answer or simply not seeing it.
I assume it's possible, otherwise, what's the point? Clues appreciated.
At least out-of-the-box this is not possible. The standard Receive
activity uses SOAP. I'm sure it's possible to implement a custom Receive but I guess it would be a non-trivial amount of work.
You can also take a look a the following questions. They are REST-related but still may give you some options (a community RESTful endpoint is being mentioned, no idea of its current state though):
RESTful Workflow Service Endpoints in WF4 / WCF
WCF Workflow Service REST interface
I ended up implementing the workflow as a regular activity (non service) inside WCF. This gave me the ability to use their parameters and pass them to the workflow directly. In the end, not too difficult to implement.
I've been given a WDSL file and have to create a web service client using axis2. I've been able to generate the CallbackHandler and Stub using WSDL2java. I've tried following this tutorial to create the Client http://briansjavablog.blogspot.com.au/2013/01/axis2-web-service-client-tutorial.html
I'm not sure if I implemented the client properly. It runs, but I'm not sure how you view any output results. I've never dealt with web services before. The Stub file that was generated contains so much code, how am I supposed to know what I should be calling? All tutorials I've found give example Clients, but I want to know what I need to look at to create my own.
If anyone has any advice or links to creating clients that are easy to understand, it would be appreciated.
I think that this probably went un-answered for a while due to the fact that the question is not clear and you probably need an introduction to Web Services and SOAP in general. If you are given the WSDL (or can pull it from a URL out there somewhere) then you are using the Web Service as a client - you have (from the post) already created the stub for client use. You simply need to use it. You are sending a request to the server (Web Service) and sending it the data that it requires (as the SOAP parameters that are laid out in the Web Service schema). Based on this SOAP request you will get a response. Your stubs that are created for the client act as the invocation and response points for your client.
So your question as to how do you test it: you decide what to do with the response as this is what you are coding into the client.
And about creating your own Web Service - you would need to start with a schema (often times you write your objects/data and the functions that you want them to perform and tools (like Axis2) will generate the server code (for Web Services and SOAP transport) on top of this.
So in your question, I think that you need to a) check out some Web Services books/online tutorials to figure out what it is, b) code your client to display the results and stuff - and just make sure that you are actually sending and getting responses from the Web Service, and c) also see what it would take to create your own Web Service (for whatever purpose you are planning the service to be established for, before creating your own.
Effectively I think that you just need to get your feet wet with Web Services in the first place. And the tutorial that you pointed out ( http://briansjavablog.blogspot.com.au/2013/01/axis2-web-service-client-tutorial.html) is excellent for anyone looking to get a web services client started - thanks for posting that.
I have two dumb/rookie questions. My problem is, I have NO idea where to begin learning this stuff.
Traditionally, I am an ASP.NET developer. I am familiar with creating and consuming traditional web services (.asmx) in ASP.NET. Now, I want to create some REST based services that adhere to the HTTP verbs approach. I intend to use WCF services to accomplish this. In addition, I want to create my services like Twitter in a fashion where the caller can reference [serviceName].[xml|json]. Unfortunately, i do not know how to allow the caller to specific the format. It seems like I need to create two seperate services which seems odd. Am I way off? Can someone point me in the right direction?
Thank you!
Check this tutorial. It will show you how to create REST service in WCF. Part 4 of the tutorial will also show you how to create REST service which is able to return both JSON and XML response. Be aware that this is for .NET 4.0 which added a lot of features to REST API (including automatic response type).
Juval Lowy's 2nd edition on Programming WCF is available. This should be an excellent source; his first book was outstanding. Michele Leroux Bustamante is another excellent author on WCF, but her 2nd edition book isn't due for another few months, so go with Juval Lowy.
Essentially, WCF separates protocol (binding) from code, so you should be able to write the service once, and use multiple end points (address, binding, etc.) to provide different formats.
The Programming WCF book has a 3rd edition out now.
I'm fighting since two days with a simple question : Is there a way to identify the source of a WCF call ?
I'm trying to find a realiable .Net property that will let the service know the address (URI) of the calling Web Service.
Especially in the case where two Web Services are hosted on the same machine.
Thanks in advance.
What about the calling client do you want to detect??
In .NET 3.5, you can fairly easily find the client's IP address - see Keyvan's blog post on that topic.
Is that what you're looking for?? If not, you'd probably have to add the caller information to the message (or the headers) explicitly for the server to be able to inspect that information.
I have a WCF service defined, it accepts JSON and maps that JSON to an object at which point I can then begin debugging code.
Sometimes, the object fails to create. Most recently my service had a BodyStyle of Wrapped but should have been Bare. In this case I would have liked to watch the request come in and see what happens to it as it gets mapped from JSON to POCO and then onto the service so I can watch for errors.
I'd also like to see what happends with the response where I have also had issues in the past.
What is the best way of seeing what is going on in WCF when it is (kind of) out of my control? What kind of logging/tracing can I use and can I see errors/exceptions being thrown by WCF?
Thanks
Scott
I don't know much but svctraceviewer might help in case you haven't heard about it already.
Arnis gives a good suggestion. I'd also suggest using Fiddler to trace WCF traffic assuming you are using a HTTP end point. I've used fiddler to troubleshoot WCF issues so it might be helpful to you as well.