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AspectInjector 2.9.0

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<img src="https://raw.githubusercontent.com/pamidur/aspect-injector/master/package.png" width="48" align="right"/>Aspect Injector

Aspect Injector is an attribute-based framework for creating and injecting aspects into your .net assemblies.

Project Status

👁 Nuget
👁 Nuget Pre
👁 Nuget

👁 GitHub (Pre-)Release Date
👁 GitHub last commit

👁 Application Status

Download

> dotnet add package AspectInjector

Features

• Compile-time injection - works with Blazor and AOT
• Injecting Before, After and Around (wrap) Methods, Constructors, Properties and Events
• Injecting Interface implementations
• Supports any project that can reference netstandard2.0 libraries, see here
• Debugging support
• Roslyn analyzers for your convenience (only c# currently)
• Can work DI/IoC frameworks #166

Check out and

Requirements

• (semi-optional) Nuget 5.0+ for transient build feature. All modern versions of VS and dotnetsdk have it. (If you still use project.json for some reason - make sure you add AspectInjector to all projects in the solution)
• (optional) For analyzers to work in VSCode, don't forget to enable "omnisharp.enableRoslynAnalyzers": true

Known Issues / Limitations

• Unsafe methods are not supported and are silently ignored.

Simple advice

Create an aspect with simple advice:

[Aspect(Scope.Global)]
[Injection(typeof(LogCall))]
public class LogCall : Attribute
{
 [Advice(Kind.Before)] // you can have also After (async-aware), and Around(Wrap/Instead) kinds
 public void LogEnter([Argument(Source.Name)] string name)
 {
 Console.WriteLine($"Calling '{name}' method..."); //you can debug it	
 }
}

Use it:

[LogCall]
public void Calculate() 
{ 
 Console.WriteLine("Calculated");
}

Calculate();

Result:

$ dotnet run
Calling 'Calculate' method...
Calculated

Simple mixin

Create an aspect with mixin:

public interface IInitializable
{
 void Init();
}

[Aspect(Scope.PerInstance)]
[Injection(typeof(Initializable))]
[Mixin(typeof(IInitializable))]
public class Initializable : IInitializable, Attribute
{
 public void Init()
 {
 Console.WriteLine("Initialized!");
 }
}

Use it:

[Initializable]
public class Target
{ 
}

var target = new Target() as IInitializable;
target.Init();

Result:

$ dotnet run
Initialized!