For example, a class in one layer declares a variable that has a class in another layer. You can discover existing dependencies by reverse-engineering them. Dependencies cannot be reverse-engineered for certain kinds of artifacts. For example, no dependencies will be reverse-engineered from or to a layer that is linked to a text file.
To see which artifacts have dependencies that you can reverse-engineer, right-click one or multiple layers, and then click View Links. In Layer Explorer , examine the Supports Validation column. Dependencies will not be reverse-engineered for artifacts for which this column shows False. Select one layer or multiple layers, right-click a selected layer, and then click Generate Dependencies. Typically, you will see some dependencies that should not exist.
You can edit these dependencies to align them with the intended design. To describe the changes that you plan to make to your system or the intended architecture, use the following steps to edit the dependency diagram.
You might also consider making some refactoring changes to improve the structure of the code before extending it. See Improving the structure of the code. Refactoring changes are improvements that do not affect the behavior of the application, but help make the code easier to change and extend in the future. Well-structured code has a design that is easy to abstract to a dependency diagram. For example, if you create a layer for each namespace in the code and then reverse-engineer the dependencies, there should be a minimal set of one-way dependencies between the layers.
If you create a more detailed diagram using classes or methods as your layers, then the result should also have the same characteristics. If this is not the case, the code will be more difficult to change throughout its life and will be less suitable for validation using dependency diagrams. When you start development of a new project, or a new area in a new project, you can draw layers and dependencies to help identify the major components before you start to develop the code.
Show identifiable architectural patterns in your dependency diagrams, if possible. For example, a dependency diagram that describes a desktop application might include layers such as Presentation, Domain Logic, and Data Store. A dependency diagram that covers a single feature within an application might have layers such as Model, View, and Controller. Create a code artifact for each layer such as a namespace, class, or component. This makes it easier to follow the code and to link the code artifacts to layers.
As soon as you create each artifact, link it to the appropriate layer. You do not have to link most classes and other artifacts to layers because they fall within larger artifacts such as namespaces that you have already linked to layers. Create a new diagram for a new feature.
Typically, there will be one or more dependency diagrams describing the whole application. If you are designing a new feature within the application, do not add to or change the existing diagrams. Instead, create your own diagram that reflects the new parts of the code. The layers in the new diagram might include presentation, domain logic, and database layers for the new feature.
When you build the application, your code will be validated both against the overall diagram and your more detailed feature diagram. To help you identify layers and dependencies or discuss them with team members, edit the appearance and layout of the diagram in the following ways:. When you have edited the diagram, you can validate it against the code manually at any time or automatically every time that you build.
Validate code with dependency diagrams. Include Layer Validation in the Build Process. Typically, errors will appear the first time that you validate code against an updated dependency diagram. These errors can have several causes:. An artifact, such as a class, uses another class in a way that conflicts with your architecture. In this case, refactor the code to remove the dependency. To resolve these errors, update the code until no more errors appear during validation.
This is usually an iterative process. For more information about these errors, see Validate code with dependency diagrams. As mentioned by rohanshah this capability does not exist out of box in Visio today and can be achieved mostly by building an Add-in for Visio. We would love to understand your scenario better and it will be great if you can share a sample Excel file with us that represents the data corresponding to a sample dependency diagram you would like to automatically generate.
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Any other inappropriate content or behavior as defined by the Terms of Use or Code of Conduct. Any image, link, or discussion related to child pornography, child nudity, or other child abuse or exploitation. Details required : characters remaining Cancel Submit. Can you please share your Excel file with the worksheet that has data corresponding to the dependency diagram you want to create?
Just the column headers and few sample data rows will be very helpful for us to understand the scenario better. Sign-up now to try out the early preview of the feature! Hello, As part of my work, I'm trying to find a way for MS Visio to automatically generate a dependancy diagram based on my MS Excel Database a table worksheet? To see if a linked item supports validation, open Layer Explorer and examine the Supports Validation property of the item.
See Managing links to artifacts. The number on a layer indicates the number of artifacts that are linked to the layer. However, when reading this number, remember the following:. If a layer links to an artifact that contains other artifacts, but the layer does not link directly to the other artifacts, then the number includes only the linked artifact. However, the other artifacts are included for analysis during layer validation.
For example, if a layer is linked to a single namespace, then the number of linked artifacts is 1, even if the namespace contains classes. If the layer also has links to each class in the namespace, then the number will include the linked classes. If a layer contains other layers that are linked to artifacts, then the container layer is also linked to those artifacts, even though the number on the container layer does not include those artifacts.
On the dependency diagram, open the shortcut menu for the layer, and then choose View Links. A dependency exists wherever an artifact that is associated with one layer has a reference to an artifact that is associated with another layer. For example, a class in one layer declares a variable that has a class in another layer.
You can reverse-engineer existing dependencies for artifacts that are linked to layers on the diagram. Dependencies cannot be reverse-engineered for certain kinds of artifacts. For example, no dependencies will be reverse-engineered from or to a layer that is linked to a text file. To see which artifacts have dependencies that you can reverse-engineer, open the shortcut menu for one or multiple layers, and then choose View Links.
In Layer Explorer , examine the Supports Validation column. Dependencies will not be reverse-engineered for artifacts for which this column shows False.
Select one or multiple layers, open the shortcut menu for a selected layer, and then choose Generate Dependencies. Typically, you will see some dependencies that should not exist.
You can edit these dependencies to align them with the intended design. To describe the changes that you plan to make to your system or the intended architecture, edit the dependency diagram:. You can change the size, shape, color, and position of layers or the color of dependencies by editing their properties. While creating dependency diagrams, you might also create code maps. These diagrams can help you discover patterns and dependencies while you explore the code.
Use Solution Explorer, Class View, or Object Browser to explore assemblies, namespaces, and classes - which often correspond well to existing layers.
For more information about code maps, see:. Map dependencies across your solutions. Use code maps to debug your applications. Find potential problems using code map analyzers. Skip to main content. This browser is no longer supported. Download Microsoft Edge More info. Contents Exit focus mode. Is this page helpful?
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