Elsa Workflows

Elsa is a workflows library that enables workflow execution in any .NET application. Workflows can be defined in a variety of ways:

• Using C# code
• Using a designer
• Using JSON
• Using a custom DSL

Documentation

Please checkout the documentation website to get started.

Features

Here are some of the more important features offered by Elsa:

• Execute workflows in any .NET app.
• Supports both short-running and long-running workflows.
• Programming model loosely inspired on WF4 (composable activities)
• Support for complex activities such as Sequence and Flowchart.
• Ships with a workflows designer web component (currently supports Flowchart diagrams only).

Examples

Hello World: Console

The following is a simple Hello World workflow created as a console application. The workflow is created using C#.

using Elsa.Extensions;
using Elsa.Workflows.Core.Activities;
using Elsa.Workflows.Core.Services;
using Microsoft.Extensions.DependencyInjection;

// Setup service container.
var services = new ServiceCollection();

// Add Elsa services.
services.AddElsa();

// Build service container.
var serviceProvider = services.BuildServiceProvider();

// Create a workflow.
var workflow = new WriteLine("Hello World!");

// Resolve a workflow runner to run the workflow.
var workflowRunner = serviceProvider.GetRequiredService<IWorkflowRunner>();

// Run the workflow.
await workflowRunner.RunAsync(workflow);

Outputs:

Hello World!