C#工作流中如何实现条件分支

发布时间:2024-08-07 15:08:09 作者:小樊
来源:亿速云 阅读:84

在C#工作流中实现条件分支可以使用条件分支活动(IfElseActivity)或Switch活动(SwitchActivity)来实现。以下是一个简单的示例代码:

using System;
using System.Workflow.Activities;

namespace ConditionalWorkflow
{
    class Program
    {
        static void Main(string[] args)
        {
            WorkflowRuntime workflowRuntime = new WorkflowRuntime();

            IfElseActivity ifElseActivity = new IfElseActivity();
            CodeActivity conditionActivity = new CodeActivity();
            conditionActivity.ExecuteCode += new EventHandler(conditionActivity_ExecuteCode);
            ifElseActivity.Activities.Add(conditionActivity);

            CodeActivity trueActivity = new CodeActivity();
            trueActivity.ExecuteCode += new EventHandler(trueActivity_ExecuteCode);
            ifElseActivity.ThenActivities.Add(trueActivity);

            CodeActivity falseActivity = new CodeActivity();
            falseActivity.ExecuteCode += new EventHandler(falseActivity_ExecuteCode);
            ifElseActivity.ElseActivities.Add(falseActivity);

            SequentialWorkflowActivity workflow = new SequentialWorkflowActivity();
            workflow.Activities.Add(ifElseActivity);

            workflowRuntime.WorkflowCompleted += new EventHandler<WorkflowCompletedEventArgs>(workflowRuntime_WorkflowCompleted);
            workflowRuntime.WorkflowTerminated += new EventHandler<WorkflowTerminatedEventArgs>(workflowRuntime_WorkflowTerminated);

            workflowRuntime.CreateWorkflow(workflow).Start();

            Console.ReadLine();
        }

        static void conditionActivity_ExecuteCode(object sender, EventArgs e)
        {
            Console.WriteLine("Checking condition...");
            // Simulate a condition
            Random random = new Random();
            bool condition = random.Next(0, 2) == 1;

            ((CodeActivity)sender).WorkflowExecutionContext.ConditionResult = condition;
        }

        static void trueActivity_ExecuteCode(object sender, EventArgs e)
        {
            Console.WriteLine("Condition is true");
        }

        static void falseActivity_ExecuteCode(object sender, EventArgs e)
        {
            Console.WriteLine("Condition is false");
        }

        static void workflowRuntime_WorkflowCompleted(object sender, WorkflowCompletedEventArgs e)
        {
            Console.WriteLine("Workflow completed");
        }

        static void workflowRuntime_WorkflowTerminated(object sender, WorkflowTerminatedEventArgs e)
        {
            Console.WriteLine("Workflow terminated");
        }
    }
}

在上面的示例中,我们创建了一个简单的工作流,其中包含一个条件分支活动(IfElseActivity),根据一个随机生成的条件执行不同的代码。条件的结果通过CodeActivity中的ConditionResult属性设置,然后根据条件的结果执行对应的代码。当工作流执行完成时,会触发WorkflowCompleted事件;如果工作流终止,则会触发WorkflowTerminated事件。

推荐阅读:
  1. OSX下安装PHP7的全过程分享
  2. PHP5和PHP7取数组元素作动态函数名有什么差异

免责声明:本站发布的内容(图片、视频和文字)以原创、转载和分享为主,文章观点不代表本网站立场,如果涉及侵权请联系站长邮箱:is@yisu.com进行举报,并提供相关证据,一经查实,将立刻删除涉嫌侵权内容。

上一篇:C#工作流与消息队列的集成技巧

下一篇:高效并行处理在C#工作流中的应用

相关阅读

您好,登录后才能下订单哦!

密码登录
登录注册
其他方式登录
点击 登录注册 即表示同意《亿速云用户服务条款》