Wcf service template visual studio 2008

WCF was introduced with. NET Fx3. Previously if you wanted apps to talk you needed to make a lot of up-front decisions:. How important is transmission speed? Over the internet, intranet, or on the same machine? If the requirements change too much, you need to rewrite the entire communication layer using an API which supports whatever mission-critical feature you need.

WCF fixes this problem and more by providing a unified programming model for all the above scenarios so you now just have to learn one API and toolset. It does this by separating the various pieces of communication, E. Rather than worrying about the specifics of how each message is transferred between client and server, WCF just asks you to focus on the service and message contracts. That is, what methods will you be able to call from a client and the structure of the data returned.

All the goo about communication protocols is highly configurable and out of code in the app. We will be creating a three-tiered application called Northwind Traders.

Our solution will comprise of four projects: a data access layer, a WCF service, a WinForms client, and a shared business logic component. Along the way we will highlight key features new to Visual Studio and demonstrate just how easy it is to write killer data-centric apps. Which is what we are going to do next. GetData myValue ; Console.

WriteLine serviceResponse ; Console. ReadLine ;. Debugging If you try to debug right now, you might get this message: Unable to automatically step into the server. The remote procedure could not be debugged. This usually indicates that debugging has not been enabled on the server. See help for more information. Do You know any tool where I can test performance and feasibility of various types of Services i.

You are commenting using your WordPress. You are commenting using your Google account. You are commenting using your Twitter account. You are commenting using your Facebook account. If you host the service library in an executable, you have to move the configuration code to the configuration file of the executable, as configuration files for DLLs are not valid.

When you create a new project using the WCF Web Application Service template, the project includes the following four files:. The template automatically creates a Web site to be deployed to a virtual directory and hosts a service in it. NET web site. To use this template, go to the Solution Explorer pane, right-click your project name, point to Add , and then click New Item to launch the Add New Item dialog box.

The template attempts to merge the configuration section of the new service to the existing configuration file, if they are compatible types. These templates create WCF services that host a Workflow Service, which is a workflow that can be accessed like a web service. Separate templates exist for XAML or imperative programming models. Using the templates, you can create sequential or state machine workflow. For more information on these types of workflow, see How to: Create a Workflow.

For more information about creating workflow projects, see Creating Legacy Workflow Projects. Visual Studio designer is more responsive when XOML type workflows are used instead of code based ones. Visual Studio tries to address this by providing adequate albeit imperfect support for targeting multiple versions of the.

NET Framework. Since the. NET Framework versions 2. In Visual Studio , the Application pane of the project Properties contains a new combobox called Target Framework that allows you to target the. The Target Framework value is only in effect at development time; it has no effect at run time your assembly still targets the. NET 2. The value you choose represents the oldest version of the. NET Framework your assembly can be built against.

New projects are configured by default to target. It gets a bit more complicated when adding references; if you downgrade the Target Framework version while referencing higher-version assemblies, Visual Studio will prompt you, fault the reference, and fail the build. Visual Studio will not allow you to add a reference to a. NET Framework assembly that requires a higher version of the Framework than your project.

If you add a reference to another project in the same solution that is of a higher version, Visual Studio will alert you as to the possible conflict. If you add a reference by browsing to an assembly, Visual Studio will not intervene to stop you. With respect to languages and cross-targeting, note that in C but not Visual Basic , you can restrict use of features such as anonymous types and extension methods in a. While this will actually work remember, the underlying runtime version is unchanged , I recommend manually setting it to version 3.

The Target Framework version matters the most when taking advantage of new project templates. WCF workflow and syndication projects must be built targeting the.

The Add Service Reference feature described later in this column is only available when selecting Framework version 3. Visual Studio ships with a ready-made, general-purpose service host called WcfSvcHost.

For ease of use, I recommend adding that location to the system's Path variable. WcfSvcHost is a simple command-line utility, accepting two parameters: the file path to a. NET assembly containing the service class or classes, and a file path to the host.

For example:. WcfSvcHost will launch a new process that will automatically host all the service classes listed in the services section of the specified. Note that these service classes, along with their service contracts and data contracts, need not be public types—they can be internal.

In addition, auto-hosted services need not provide any metadata, but they can publish metadata if they choose to. WcfSvcHost is a Windows Forms application that resides as a desktop tray icon. To close the host, simply select Exit from the tray icon context menu. Terminating the host this way is an ungraceful exit—WcfSvcHost will abort all calls currently in progress, and clients are likely to receive an exception.

If you click on the WcfSvcHost tray icon, it will bring up a dialog listing all the hosted services see Figure 2. The dialog also shows the status of the service and its metadata address, which you can copy to the clipboard, perhaps for use later when adding a reference to the service.

WcfSvcHost is designed to eliminate the need during development for a separate host assembly to accompany your service library. Developing such host projects is a repetitive task; these hosts typically contain the same lines of code over and over again, and they tend to bloat the solution when you have multiple service libraries. For development and testing purposes, you can integrate WcfSvcHost directly into your Visual Studio service library projects.

In the Debug pane of the project properties, specify WcfSvcHost. With that done, when you run the class library something you could not do before , it will be automatically hosted by WcfSvcHost with the debugger attached to that process.

When you stop debugging, Visual Studio will abort the host ungracefully.