Visual Studio caches assemblies that are called by T4 templates, so you must close and reopen Visual Studio before you can recompile assemblies used by T4 templates. File resolution is relative to the entry template. This provides compile-time checking and IntelliSense where you need it most. The ModelHelper.cs class, which you can find in the download, is compiled into an assembly and is responsible for discovery, loading, caching and navigation.
Note the usage of the $(SolutionDir) and the host ResolvePath method to locate relative files in Listing 1. It doesn't load or perform navigation directly against the model, but delegates the shared template shown in Listing 1. The output is: namespaceModelingProject1įrom a separation-of-concerns perspective, the entry template is responsible for defining output and uses only the IClass and IProperty interfaces. For more information on details of T4 templates, see Oleg Sych's blog at. If you want coloration, it's available via the Tangible T4 Editor from Tools/Extension Manager/Online Gallery. I'll keep the template simple to focus on integrating templates into UML modeling and writing good templates: The templates won't automatically run when the model is changed. You can also click the Transform All Templates button in the Solution Explorer header. These templates run when the template is modified and saved. You can generate code by adding T4 templates to the solution that contains the model. As a logical view of your application, a UML diagram expresses each concept (customer and invoice) once, regardless of how many classes are involved in your architecture. In this article, I'll stick to classes, enums and attributes, but you'll find a robust set of UML features.įigure 1. Use UML packages to place elements in different namespaces. To include elements in multiple diagrams, drag them from the UML Model Explorer. Create a new UML Class Diagram and drag classes, interfaces and enumerations from the toolbox, as shown in Figure 1. If modeling projects aren't available, check that you have the Ultimate version.
How does that work?Ī: You can create a new modeling project in Visual Studio. Q: I heard you could generate code from UML diagrams.
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The UML modeler is built on top of the Domain-Specific Language (DSL) Toolkit, so you'll need to download and install the Visual Studio 2010 SDK and the Visual Studio 2010 Visualization and Modeling SDK.
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While I generally stick to Visual Studio Professional Edition features when writing this column, the full UML support is part of a compelling package in the new architect features of Visual Studio 2010 Ultimate. Each element can exist on multiple diagrams.
The model contains all the elements of your application. The UML modeler also differentiates between models and diagrams. UML diagrams express each concept once, regardless of how many classes are involved in your architecture. Class Diagrams include all of these classes. These concepts are expressed in multiple places: business objects, UI elements, data objects and other classes. Consider concepts in your application such as customers and invoices.
This is distinct from the physical view represented by the Class Diagrams available in all SKUs of Visual Studio. Unified Modeling Language (UML) represents a logical view of your application. The UML modeler is a powerful new tool, especially when it's backed with a code-generation system.
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Ask Kathleen How to Generate Code from a UML Model in Visual Studio 2010
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