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  • Implementing an interface using an asynchronous WCF service?

    - by John K.
    Hello, I am trying to figure out if it is possible to implement a .NET interface, where the interface method has to return something and you are implementing that particular interface method with an asynchronous WCF service? Hopefully you should already see the issue I am encountering. Here is the interface: public interface IDataService { IDataServiceResponse SendDataRequest(); } IDataServiceResponse is supposed to represent a simple container that holds the result of my asynchronous WCF callback. Here is the code snippet where I am implementing the interface method, SendDataRequest() public IDataServiceResponse SendDataRequest() { InitializeDataServiceParameters(); // Call the web service asynchronously, here.... _client.BeginQueryJobs(_parameters, DataServiceQueryCallBack, _client); // How do I return _dataServiceResponse, if I am calling the WCF service // asynchronously?? return _dataServiceResponse; } And the callback method signature: void DataServiceQueryCallBack(IAsyncResult result) { // ... implementation code } Thanks in advance, John

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  • WCF configuration setting information at a glance

    - by Newbie
    Is there any site from where I can get the most of the information about WCF configuration settings e.g. keyEntropyMode,maxStatefulNegotiations,sessionKeyRolloverInterval, negotiationTimeout etc. I have started recently working in wcf but is facing many troubles in understanding the terms. There are to be honest huge. And whenever I get stuck, it takes a long time for me to solve it (searching and searching in google and after spending sometime hours I may get the solution). Henceforth, I think it is better to know if not all astleast some of the terms and their usage and what they means. It would be great help if anyone can point such a link. I searched in the net with " wcf configuration file elements" but with not much luck. Thanks

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  • WCF service and Identity in configuration.

    - by pdiddy
    What is the purpose of this Identify that sometime I find in the generated in the configuration when adding a service reference in the a client project. I have this wcf service running under local system account. It looks like I don't need to specify this identity in the client configuration. But if I run the wcf service under a specific account. I have to set the identity userprincipalname to the account the service is running under or else my client can't communicate at all with the wcf service. Can someone shed more light on this configuration? Maybe some articles on the net?

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  • How to correctly open WCF service

    - by Sergej Andrejev
    Hi there, I'm using WCF client like this... var client = new TestClient(); try { response = service.Operation(request); } finally { try { if (client.State != CommunicationState.Faulted) client.Close(); } catch (Exception) { client.Abort(); } } but from time to time I get 500 HTTP error which is the only answer I get for next 15 minutes, then everything is back to normal for 15 minutes and so on. I know there is some load balancing stuff going on service side but guys there can't find any problems with it. That's why I started wondering am I using WCF service correctly. I already made a mistake once when I was using "using" to close service connection and I'm afraid I doing something wrong again. So can anybody say whether my way of calling WCF service is correct or not in all (event the most rare) circumstances?

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  • What are the benefits of using WCF?

    - by sontek
    We currently just utilize soap webservices for all our communication but have been thinking about moving to WCF instead. What are the benefits of using it over an asmx service? If we do go with a WCF service, can other languages still communicate with it? SOAP is standardized and all languages can interact with it. Are there any really good examples of how to get started with WCF that show the benefits of it over soap? EDIT I just found this question which is quite helpful. The Getting Started Tutorial is great.

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  • WCF: generic list serialized to array

    - by OpticalDelusion
    So I am working with WCF and my services return types that contain generic lists. WCF is currently converting these to arrays over the wire. Is there a way I configure WCF to convert them back to lists afterwards? I know there is a way by clicking advanced when you add a service reference but I am looking for a solution in configuration files or something similar. [DataContract(IsReference = true)] public class SampleObject { [DataMember] public long ID { get; private set; } [DataMember] public ICollection<AnotherObject> Objects { get; set; } } It is very odd, also, because one service returns it as a list and the other as an array and I am pretty sure they are configured identically.

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  • Constraints when using WCF for an online multiplayer game

    - by Etan
    I want to build a service oriented game server and client using WCF where users can play card games on different tables after they logged in with an account. I would like to choose WCF due to it's flexibility in exchanging the communication channels. Maybe, a web interface will be added later which can then just use an other channel class. An additional plus is the ability for contexts which could be used to track a user over a whole gaming session. Are there some constraints I should be aware of when using WCF for the communication between the client and the server?

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  • Architecture Guidance for designing Workflow Foundation with WCF

    - by Matrix
    We are planning to use WF 3.5 with WCF 3.5 and Entity Framework 1.0 for the upcoming major project. I'm looking for guidance on the architecture side. This new application will be based on typical 3-tier architecture as depicted below: Presentation Tier: ASP.NET Web Forms 3.5 Business Tier: WF 3.5 + BLL's that expose the business logic through WCF service interfaces (using EF for Data Access) Data Tier: SQL Server 2000 Here are the questions: Though the Workflow Foundation has Workflow Services, where we can map the WCF service contracts to a workflow, is this the right way to design the applications? Is EF 1.0 business entities can be used in n-tier apps without sacrificing the tracking changes in the entities? Is there a sample reference application available to look? Thanks.

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  • Routing WCF Traffic Based on URI Domain Requested

    - by Ian Patrick Hughes
    Is there a way to route traffic to a target WCF service file based on the URL domain requested? Basically, I have a single WCF RESTful services project with 3 service files offering different endpoints. It's hosted on a single IIS6 site looking for multiple host header values on port 80. I want to route traffic to different services files whether the requester is asking for www.site1.com, www.site2.com, or www.site3.com. Seems like the sort of thing I would use a global.asax or HTTP Handler for, but I am not sure since this is a regular WCF Service Application. Even though I am on IIS6 for this project, I don't mind using a URL re-writer and wildcard mapping, if I have to. I have admin rights on the balanced servers where this will reside, I just want to know if there is a common/best practice before I start hacking my way around this.

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  • Self hosted WCF console output from service

    - by user989056
    quick one: Is it possible to capture the output stream of a WCF service that is hosted via ServiceHost ( self hosted service) ? I have methods within my WCF service that output useful debugging information, is it possible to send these to it's host's console output? Edit: It appears that I have made an obvious blunder - I was using Debug instead of Console. It is possible to output to the console by using the standard Console output commands in your WCF service class. I have marked the answer that I have found the most useful.

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  • how to selfhost wcf without iis

    - by dotnetcoder
    Reading up on WCF we have self hosting option available , one limitation here is we have to manage the host process lifecycle ourselves. What I am exploring here is to run the service without IIS and do a self hosting. Few things come to mind - How will request management work here. In case of IIS it manages the request and give control to dotnet on a particular thread. In absence of IIS do we need to write code ourselves to manage incoming requests ( say on a tcp port ) or WCF provides some classes to manage request and spawn threads to process each thread. I am aware that in case of self hosting this needs to be a windows service. In case of self hosting how can me tap on the number of simultaneous requests on the sever , it can be managed by limiting the thread pool ? or we can configure this via wcf ? Thanks dc

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  • WCF - call same service from client and server side

    - by Steve
    I have a simple WCF service that I call server side from code behind via a service reference. It's used for validation and works and was automatically setup by Visual Studio and is using SOAP I think because the binding is wsHttpBinding. I want to use the same WCF service, but call it client side from jQuery using ajax(). I'm trying to implement it by way of these instructions. But if I make the changes to get the client side call working, I have to add the decoration below which I think will break what works on the server side and also change the system.serviceModel section in web.config. [WebInvoke(Method = "POST", BodyStyle = WebMessageBodyStyle.Wrapped, ResponseFormat = WebMessageFormat.Json, RequestFormat= WebMessageFormat.Json) ] How do I have a WCF service that can be called both from the server-side and client side (jQuery/ajax)?

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  • Can I use WCF on Visual Studio 2005?

    - by Hemant
    I am about to start a project which consumes third party web services. Because of a legacy system, I am told that I can only use Visual Studio 2005/.NET 2.0. (Though I would have preferred Visual Studio 2008 on .NET 3.5) My understanding is that WCF was released with .NET 3.0. So is there any possibility to use WCF on Visual Studio 2005 by using just the WCF assemblies of .NET 3.0? I will then try to convince them that it is just like using external framework which doesn't disturb anything.

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  • Strange WPF Behaviour With WCF Async calls

    - by gvigsgb
    I have a WPF application calling WCF via Async calls. The application has four tabs in which each are loaded from seperate async calls, each tab has a busy indicator. The problem: When running within Visual Studio I can click a refresh button on each tab and each tab's busy indicator starts and the data is retrieved from the WCF service. As each tab's data comes back it is refreshed. When I deploy the application via one click the application's UI hangs after only two tabs start refreshing. So in this case I press refresh on tab one, then on tab two and the application hangs until one of the two tabs data comes back. I thought at first that it was something to do with the WCF service throtteling and that was not the case as both the Visual Studio and the One Click deployments of the application point to the same service. Anyone have any ideas on where to look? I cannot reproduce the hang issue within Visual Studio?

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  • How to get online or offline state of a WCF Service with a WP7 Application

    - by Arjuna Wenzel
    im working on a Windows Phone 7 Application that communicates with a Azure hosted WCF service. Everything works fine in communication and so on. But i want to handle the situation when the Service is not online. Now the WP7 App has a main screen with a login. After clicking the "Login" button the Application sends the credentials to the WCF Service which communicates with a Database. And now my question is, is there a way to get the online/offline state of the WCF Service? So i could give feedback to the user and the application wouldnt crash (: Thx alot for any answer!

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  • Silverlight app doesn't access web over WCF in IIS

    - by S.Amani
    Hi, My application SilverLight which is hosted in my local host, doesn't access my web app and its database over WCF. I don't know why !!. I've looked over 100 sites and blogs which they have scribed how to configure WCF in IIS, but I can't fix my problem. Note : I debugged it with fiddler in my localhost, everything just worked fine, I saw all my site transaction, except a button which is responsible to access Data over WCF, fiddler didn't log that. Any advice will be helpful. Best Regards SABER.

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  • amazon web services and sql server support

    - by user25011
    Hi All, I have built my application using sql server 2008 and .net framework 3.5 I am looking for a sclable hosting service and have come to think of amazon web services. Does amazon also support hosting of sql server 2008 databases? What hosting services do you advise Thank you.

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  • window services works after local account used before this account

    - by Gauls
    Hi All of a sudden my window services app after installation does not start(Some services stop automatically if they have no work to do) uses custom user, if i change the logon setting to use local system account and click start works fine, then when i go back and change to use this account (local user- custom user under user group) and then click start it works fine, why didn't work in the first place???????????? Thanks

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  • Difference between Software Services & IT Consulting.

    - by Rohit
    I have been looking into sites of IT companies but I am confused with the terms they use for their offerings. Some write: "Software Services, IT Consulting", some write: "Technology, Consulting", some write" "Product engineering, Application Development". Can someone clarify what is the difference between: (1) Software services & IT Consulting. (2) Technology and Consulting.

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  • User does not exist when configuring Sharepoint Report Services

    - by Michael S
    Installing in a vm which is running Windows Server 2003 Installed SQLServer 2005 with reporting services Installed ServicePack 2 Installed SharePoint 2003 Configured SSRS per (Installation/Configuration Guide for SharePoint Integration Mode) by Raju Sakthivel Architect Installed SharePoint Report Services Add-in When to SharePoint 2003 Admin Central a. Reporting Administration i. Grant Database Access 1. Username, password - used login (part of Local Admin Group) - username doesn't exist. Need help figuring out this issue!

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  • Windows XP "automatic" services not starting

    - by Mala
    Hi I have a fresh install of WinXP. The main problem is that every time I start it up, I have to go into Administrative Tools and start the needed services, such as DCOM, RTP, DHCP, etc etc. The only services that start automatically are: plug and play remote procedure server windows audio workstation All of the rest have to be started manually, in spite of the fact that they're listed as "automatic". Why won't they start on their own like they should? Thanks, Mala

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  • Solaris: Is it OK to disable font services?

    - by cjavapro
    Is it OK to disable these services? # svcs -l '*font*' fmri svc:/application/font/stfsloader:default name Standard Type Services Framework (STSF) Font Server loader enabled true state online next_state none state_time Sun May 30 17:58:14 2010 restarter svc:/network/inetd:default fmri svc:/application/font/fc-cache:default name FontConfig Cache Builder enabled true state online next_state none state_time Sun May 30 17:58:15 2010 logfile /var/svc/log/application-font-fc-cache:default.log restarter svc:/system/svc/restarter:default dependency require_all/none svc:/system/filesystem/local (online) dependency require_all/refresh file://localhost/etc/fonts/fonts.conf (online) dependency require_all/none file://localhost/usr/bin/fc-cache (online) #

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  • mexTcpBinding in WCF - IMetadataExchange errors

    - by David
    I'm wanting to get a WCF-over-TCP service working. I was having some problems with modifying my own project, so I thought I'd start with the "base" WCF template included in VS2008. Here is the initial WCF App.config and when I run the service the WCF Test Client can work with it fine: <?xml version="1.0" encoding="utf-8" ?> <configuration> <system.web> <compilation debug="true" /> </system.web> <system.serviceModel> <services> <service name="WcfTcpTest.Service1" behaviorConfiguration="WcfTcpTest.Service1Behavior"> <host> <baseAddresses> <add baseAddress="http://localhost:8731/Design_Time_Addresses/WcfTcpTest/Service1/" /> </baseAddresses> </host> <endpoint address="" binding="wsHttpBinding" contract="WcfTcpTest.IService1"> <identity> <dns value="localhost"/> </identity> </endpoint> <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/> </service> </services> <behaviors> <serviceBehaviors> <behavior name="WcfTcpTest.Service1Behavior"> <serviceMetadata httpGetEnabled="True"/> <serviceDebug includeExceptionDetailInFaults="True" /> </behavior> </serviceBehaviors> </behaviors> </system.serviceModel> </configuration> This works perfectly, no issues at all. I figured changing it from HTTP to TCP would be trivial: change the bindings to their TCP equivalents and remove the httpGetEnabled serviceMetadata element: <?xml version="1.0" encoding="utf-8" ?> <configuration> <system.web> <compilation debug="true" /> </system.web> <system.serviceModel> <services> <service name="WcfTcpTest.Service1" behaviorConfiguration="WcfTcpTest.Service1Behavior"> <host> <baseAddresses> <add baseAddress="net.tcp://localhost:1337/Service1/" /> </baseAddresses> </host> <endpoint address="" binding="netTcpBinding" contract="WcfTcpTest.IService1"> <identity> <dns value="localhost"/> </identity> </endpoint> <endpoint address="mex" binding="mexTcpBinding" contract="IMetadataExchange"/> </service> </services> <behaviors> <serviceBehaviors> <behavior name="WcfTcpTest.Service1Behavior"> <serviceDebug includeExceptionDetailInFaults="True" /> </behavior> </serviceBehaviors> </behaviors> </system.serviceModel> </configuration> But when I run this I get this error in the WCF Service Host: System.InvalidOperationException: The contract name 'IMetadataExchange' could not be found in the list of contracts implemented by the service Service1. Add a ServiceMetadataBehavior to the configuration file or to the ServiceHost directly to enable support for this contract. I get the feeling that you can't send metadata using TCP, but that's the case why is there a mexTcpBinding option?

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