PlantUmlClassDiagramGenerator

This is a generator to create a class-diagram of PlantUML from the C# source code.

Visual Studio Code Extension

• C# to PlantUML

.Net Core global tools

Nuget Gallery: https://www.nuget.org/packages/PlantUmlClassDiagramGenerator

Installation

Download and install the .NET Core 2.1 SDK or newer. Once installed, run the following command.

dotnet tool install --global PlantUmlClassDiagramGenerator

Usage

Run the "puml-gen" command.

puml-gen InputPath [OutputPath] [-dir] [-public | -ignore IgnoreAccessibilities] [-excludePaths ExcludePathList] [-createAssociation]

• InputPath: (Required) Sets a input source file or directory name.
• OutputPath: (Optional) Sets a output file or directory name.
  If you omit this option, plantuml files are outputted to same directory as the input files.
• -dir: (Optional) Specify when InputPath and OutputPath are directory names.
• -public: (Optional) If specified, only public accessibility members are output.
• -ignore: (Optional) Specify the accessibility of members to ignore, with a comma separated list.
• -excludePaths: (Optional) Specify the exclude file and directory.
  Specifies a relative path from the "InputPath", with a comma separated list.
• -createAssociation: (Optional) Create object associations from references of fields and properites.
• -allInOne: (Optional) Only if -dir is set: copy the output of all diagrams to file include.puml (this allows a PlanUMLServer to render it).

examples

puml-gen C:\Source\App1\ClassA.cs -public

puml-gen C:\Source\App1 C:\PlantUml\App1 -dir -ignore Private,Protected -createAssociation -allInOne

puml-gen C:\Source\App1 C:\PlantUml\App1 -dir -excludePaths bin,obj,Properties

Specification for conversion to PlantUML

Type Declaration

Type Keywords

Type Modifiers

• C#

class ClassA {  
}
struct StructA {
}
interface InterfaceA {
}
abstract class AbstractClass {
}
static class StaticClass {
}
sealed partial class ClassB{
}
enum EnumType{
  Apple,
  Orange,
  Grape
}

• PlantUML

@startuml
class ClassA {
}
class StructA <<struct>> {
}
interface InterfaceA {
}
abstract class AbstractClass {
}
class StaticClass <<static>> {
}
class ClassB <<sealed>> <<partial>> {
}
enum EnumType {
    Apple,
    Orange,
    Grape,
}
@enduml

Generics Type

• C#

class GenericsType<T1>{
}
class GenericsType<T1,T2>{
}

• PlantUML

class "GenericsType`1"<T1>{
}
class "GenericsType`2"<T1,T2>{
}

Member Declaration

Accessibility Modifiers

Modifiers

Property Accessors

• C#

abstract class AbstractClass
{
    protected int _x;
    internal int _y;
    protected internal int _z;
    public abstract void AbstractMethod();
    protected virtual void VirtualMethod(string s){

    }
    public string BaseMethod(int n){
        return "";
    }
}
class ClassM : AbstractClass
{
    public static readonly double PI =3.141592;
    public int PropA { get; set; }
    public int PropB { get; protected set; }
    public event EventHandler SomeEvent;
    public override void AbstractMethod(){
        
    }
    protected override void VirtualMethod(string s)
    {

    }
    public override string ToString()
    {
        return "override";
    }
    public new string BaseMethod(int n){
        return "new";
    }
}

• PlantUML

abstract class AbstractClass {
    # _x : int
    <<internal>> _y : int
    # <<internal>> _z : int
    + {abstract} AbstractMethod() : void
    # <<virtual>> VirtualMethod(s:string) : void
    + BaseMethod(n:int) : string
}
class ClassM {
    + {static} <<readonly>> PI : double = 3.141592
    + PropA : int <<get>> <<set>>
    + PropB : int <<get>> <<protected set>>
    +  <<event>> SomeEvent : EventHandler 
    + <<override>> AbstractMethod() : void
    # <<override>> VirtualMethod(s:string) : void
    + <<override>> ToString() : string
    + <<new>> BaseMethod(n:int) : string
}
AbstractClass <|-- ClassM

Field and Property Initializers

Only literal initializers are output.

• C#

class ClassC
{
    private int fieldA = 123;
    public double Pi {get;} = 3.14159;
    protected List<string> Items = new List<string>(); 
}

• PlantUML

class ClassC {
  - fieldA : int = 123
  + Pi : double = 3.14159
  # Items : List<string>
}

Nested Class Declaration

Nested classes are expanded and associated with "OuterClass + - InnerClass".

• C#

class OuterClass 
{
  class InnerClass 
  {
    struct InnerStruct 
    {

    }
  }
}

• PlantUML

class OuterClass{

}
class InnerClass{

}
<<struct>> class InnerStruct {

}
OuterClass +- InnerClass
InnerClass +- InnerStruct

Inheritance Relationsips

• C#

abstract class BaseClass
{
    public abstract void AbstractMethod();
    protected virtual int VirtualMethod(string s) => 0;
}
class SubClass : BaseClass
{
    public override void AbstractMethod() { }
    protected override int VirtualMethod(string s) => 1;
}

interface IInterfaceA {}
interface IInterfaceA<T>:IInterfaceA
{
    T Value { get; }
}
class ImplementClass : IInterfaceA<int>
{
    public int Value { get; }
}

• PlantUML

abstract class BaseClass {
    + {abstract} AbstractMethod() : void
    # <<virtual>> VirtualMethod(s:string) : int
}
class SubClass {
    + <<override>> AbstractMethod() : void
    # <<override>> VirtualMethod(s:string) : int
}
interface IInterfaceA {
}
interface "IInterfaceA`1"<T> {
    Value : T <<get>>
}
class ImplementClass {
    + Value : int <<get>>
}
BaseClass <|-- SubClass
IInterfaceA <|-- "IInterfaceA`1"
"IInterfaceA`1" "<int>" <|-- ImplementClass

Associations (from references of fields and properties)

If you specify the "createAssociation" option, object associations is created from field and property references.

• C#

class ClassA{
    public IList<string> Strings{get;} = new List<string>();
    public Type1 Prop1{get;set;}
    public Type2 field1;
}

class Type1 {
    public int value1{get;set;}
}

class Type2{
    public string string1{get;set;}
    public ExternalType Prop2 {get;set;}
}

• PlantUML

@startuml
class ClassA {
}
class Type1 {
    + value1 : int <<get>> <<set>>
}
class Type2 {
    + string1 : string <<get>> <<set>>
}
class "IList`1"<T> {
}
ClassA o-> "Strings<string>" "IList`1"
ClassA --> "Prop1" Type1
ClassA --> "field1" Type2
Type2 --> "Prop2" ExternalType
@enduml