文章目录前言1.什么是工作流一、Workflow-Core轻量级工作流引擎1.安装包2.简单使用2.1 定义步骤2.2 定义工作流2.3 启动工作流2.4 运行二、Workflow-Core的流程配置1.代码配置2.JSON配置3.YAML配置前言1.什么是工作流工作流是OA系统比较重要的功能之一，主要在于企业流程协同审批，有效进行流程管理。
流程管理起源于生产组织和办公自动化领域，是针对日常工作中具有固定程序的活动提出的一个概念。目的是通过将工作分解成定义良好的任务、角色，按照一定的规则和过程来执行这些任务并对它们进行监控，达到提高办事效率、降低生产成本、提高企业生产经营管理水平和企业竞争力的目标。
现代计算机技术实现了工作流，是支持企业经营过程高效执行并监控其执行过程的计算机软件系统。工作流软件类似电脑桌面操作系统，操作系统驱动电脑各部件协同运转，工作流软件则驱动业务过程自动有序进行。
Workflow-Core地址：https://github.com/danielgerlag/workflow-core
一、Workflow-Core轻量级工作流引擎1.安装包代码语言：javascript复制Install-Package WorkflowCore
Microsoft.Extensions.Logging
Microsoft.Extensions.Logging.Debug2.简单使用2.1 定义步骤1、步骤一
代码语言：javascript复制using System;
using System.Linq;
using WorkflowCore.Interface;
using WorkflowCore.Models;
namespace WorkflowCore.Sample01.Steps
{
public class HelloWorld : StepBody
{
public override ExecutionResult Run(IStepExecutionContext context)
{
Console.WriteLine("Hello world");
return ExecutionResult.Next();
}
}
}2、步骤二
代码语言：javascript复制using Microsoft.Extensions.Logging;
using WorkflowCore.Interface;
using WorkflowCore.Models;
namespace WorkflowCore.Sample01.Steps
{
public class GoodbyeWorld : StepBody
{
private ILogger _logger;
public GoodbyeWorld(ILoggerFactory loggerFactory)
{
_logger = loggerFactory.CreateLogger
}
public override ExecutionResult Run(IStepExecutionContext context)
{
Console.WriteLine("Goodbye world");
_logger.LogInformation("Hi there!");
return ExecutionResult.Next();
}
}
}2.2 定义工作流代码语言：javascript复制using WorkflowCore.Interface;
using WorkflowCore.Models;
using WorkflowCore.Sample01.Steps;
namespace WorkflowCore.Sample01
{
public class HelloWorldWorkflow : IWorkflow
{
public void Build(IWorkflowBuilder
{
builder
.UseDefaultErrorBehavior(WorkflowErrorHandling.Suspend)
.StartWith
.Then
}
public string Id => "HelloWorld";
public int Version => 1;
}
}2.3 启动工作流代码语言：javascript复制using Microsoft.Extensions.DependencyInjection;
using WorkflowCore.Interface;
using WorkflowCore.Sample01;
using WorkflowCore.Sample01.Steps;
IServiceProvider serviceProvider = ConfigureServices();
//start the workflow host
var host = serviceProvider.GetService
host.RegisterWorkflow
host.Start();
host.StartWorkflow("HelloWorld");
Console.ReadLine();
host.Stop();
static IServiceProvider ConfigureServices()
{
//setup dependency injection
IServiceCollection services = new ServiceCollection();
services.AddLogging();
services.AddWorkflow();
//services.AddWorkflow(x => x.UseMongoDB(@"mongodb://localhost:27017", "workflow"));
services.AddTransient
var serviceProvider = services.BuildServiceProvider();
return serviceProvider;
}2.4 运行二、Workflow-Core的流程配置1.代码配置代码语言：javascript复制public class MyWorkflow : IWorkflow
{
public void Build(IWorkflowBuilder
{
builder
.StartWith
.Then
.Then
}
}2.JSON配置代码语言：javascript复制{
"Id": "HelloWorld",
"Version": 1,
"Steps": [
{
"Id": "Hello",
"StepType": "MyApp.HelloWorld, MyApp",
"NextStepId": "Bye"
},
{
"Id": "Bye",
"StepType": "MyApp.GoodbyeWorld, MyApp"
}
]
}3.YAML配置代码语言：javascript复制Id: HelloWorld
Version: 1
Steps:
- Id: Hello
StepType: MyApp.HelloWorld, MyApp
NextStepId: Bye
- Id: Bye
StepType: MyApp.GoodbyeWorld, MyApp