通过AEC解读WF的核心原理(十)取消与取消处理器
说明
例子下载:
https://files.cnblogs.com/wxwinter/aec10_1.rar
https://files.cnblogs.com/wxwinter/aec10_2.rar
取消的实现
取消处理器CancellationHandlerActivity的使用
例子:取消
内容控件Activity
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public class 内容控件: Activity { protected override ActivityExecutionStatus Execute(ActivityExecutionContext executionContext) { this.Invoke(正常业务, new EventArgs()); return ActivityExecutionStatus.Executing; }
protected override ActivityExecutionStatus Cancel(ActivityExecutionContext executionContext) { System.Console.WriteLine("取消"); this.Invoke(取消业务, new EventArgs()); return ActivityExecutionStatus.Canceling; // return ActivityExecutionStatus.Closed; }
void 正常业务(object sender, EventArgs e) { System.Console.WriteLine("wxwinter"); ActivityExecutionContext aec = sender as ActivityExecutionContext; aec.CloseActivity(); }
void 取消业务(object sender, EventArgs e) { //用于处理取消是否恢复的业务 ActivityExecutionContext aec = sender as ActivityExecutionContext; aec.CloseActivity(); } } |
容器控件Activity
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public class 容器控件: SequenceActivity { public 容器控件() { InitializeComponent(); }
[System.Diagnostics.DebuggerNonUserCode] private void InitializeComponent() { this.CanModifyActivities = true; this.内容控件1 = new wxwinterAecTest.内容控件(); this.内容控件1.Name = "内容控件1"; this.Activities.Add(this.内容控件1); this.CanModifyActivities = false; }
private 内容控件 内容控件1;
protected override ActivityExecutionStatus Execute(ActivityExecutionContext executionContext) { this.内容控件1.Closed += activity11_Closed; this.内容控件1.Executing+=new EventHandler<ActivityExecutionStatusChangedEventArgs>(activity11_Executing); executionContext.ExecuteActivity(this.内容控件1); return ActivityExecutionStatus.Executing;
}
bool IsCancel = false;
void activity11_Executing(object sender, ActivityExecutionStatusChangedEventArgs e) { IsCancel = true; //一个模拟要取消的业务情形 if (IsCancel) { ActivityExecutionContext aec = sender as ActivityExecutionContext; aec.CancelActivity(this.内容控件1); } }
void activity11_Closed(object sender, ActivityExecutionStatusChangedEventArgs e) { e.Activity.Closed -= activity11_Closed; ActivityExecutionContext aec = sender as ActivityExecutionContext; aec.CloseActivity(); } } |
测试用工作流
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public class Workflow1: SequentialWorkflowActivity { private 容器控件 容器控件1; public Workflow1() { InitializeComponent(); }
[System.Diagnostics.DebuggerNonUserCode] private void InitializeComponent() { this.CanModifyActivities = true; this.容器控件1 = new wxwinterAecTest.容器控件(); // // 容器控件1 // this.容器控件1.Name = "容器控件1"; // // Workflow1 // this.Activities.Add(this.容器控件1); this.Name = "Workflow1"; this.CanModifyActivities = false; } } |
宿主
class Program { static void Main() { WorkflowRuntime workflowRuntime = new WorkflowRuntime(); workflowRuntime.WorkflowCompleted +=new EventHandler<WorkflowCompletedEventArgs>(workflowRuntime_WorkflowCompleted); workflowRuntime.WorkflowTerminated +=new EventHandler<WorkflowTerminatedEventArgs>(workflowRuntime_WorkflowTerminated); workflowRuntime.WorkflowIdled+=new EventHandler<WorkflowEventArgs>(workflowRuntime_WorkflowIdled); WorkflowInstance instance = workflowRuntime.CreateWorkflow(typeof(Workflow1)); instance.Start();
System.Console.Read();
}
static void workflowRuntime_WorkflowIdled(object sender, WorkflowEventArgs e) { System.Console.WriteLine("WorkflowIdled"); }
static void workflowRuntime_WorkflowTerminated(object sender, WorkflowTerminatedEventArgs e) { System.Console.WriteLine("Terminated" + e.Exception.Message); }
static void workflowRuntime_WorkflowCompleted(object sender, WorkflowCompletedEventArgs e) { System.Console.WriteLine("WorkflowCompleted"); }
} |
运行结果
IsCancel = true;
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IsCancel = false
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例子:取消处理器CancellationHandlerActivity
支持取消的控件Activity
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public class 支持取消的控件 : SequenceActivity { protected override ActivityExecutionStatus Execute(ActivityExecutionContext executionContext) { this.EnabledActivities[0].Closed +=Activity_Closed; executionContext.ExecuteActivity(this.EnabledActivities[0]); return ActivityExecutionStatus.Executing; }
void Activity_Closed(object sender, ActivityExecutionStatusChangedEventArgs e) { ActivityExecutionContext aec = sender as ActivityExecutionContext; aec.CloseActivity(); }
protected override ActivityExecutionStatus Cancel(ActivityExecutionContext executionContext) { foreach (var v in this.Activities) { if (v is CancellationHandlerActivity) { v.Closed += CancellationHandlerActivity_Closed; executionContext.ExecuteActivity(v); return ActivityExecutionStatus.Canceling; } } return ActivityExecutionStatus.Closed; }
void CancellationHandlerActivity_Closed(object sender, ActivityExecutionStatusChangedEventArgs e) { ActivityExecutionContext aec = sender as ActivityExecutionContext; aec.CloseActivity(); }
} |
可取消的容器Activity
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public class 可取消的容器 : SequenceActivity { protected override ActivityExecutionStatus Execute(ActivityExecutionContext executionContext) { this.EnabledActivities[0].Closed += activity_Closed; this.EnabledActivities[0].Executing += activity_Executing; executionContext.ExecuteActivity(this.EnabledActivities[0]); return ActivityExecutionStatus.Executing; } public bool 是否取消 { get; set; } void activity_Executing(object sender, ActivityExecutionStatusChangedEventArgs e) { if (是否取消) { ActivityExecutionContext aec = sender as ActivityExecutionContext; aec.CancelActivity(this.EnabledActivities[0]); } }
void activity_Closed(object sender, ActivityExecutionStatusChangedEventArgs e) { e.Activity.Closed -= activity_Closed; ActivityExecutionContext aec = sender as ActivityExecutionContext; aec.CloseActivity(); } } |
测试用工作流
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public class Workflow1: SequentialWorkflowActivity { private CodeActivity 正常路径业; private 支持取消的控件 支持取消的控件1; private CodeActivity 取消业务路径; private CancellationHandlerActivity cancellationHandlerActivity1; private 可取消的容器 可取消的容器1;
public Workflow1() { InitializeComponent(); } [System.Diagnostics.DebuggerNonUserCode] private void InitializeComponent() { this.CanModifyActivities = true; this.取消业务路径 = new System.Workflow.Activities.CodeActivity(); this.cancellationHandlerActivity1 = new System.Workflow.ComponentModel.CancellationHandlerActivity(); this.正常路径业 = new System.Workflow.Activities.CodeActivity(); this.支持取消的控件1 = new wxwinterAecTest.支持取消的控件(); this.可取消的容器1 = new wxwinterAecTest.可取消的容器(); // // 取消业务路径 // this.取消业务路径.Name = "取消业务路径"; this.取消业务路径.ExecuteCode += new System.EventHandler(this.取消业务路径_ExecuteCode); // // cancellationHandlerActivity1 // this.cancellationHandlerActivity1.Activities.Add(this.取消业务路径); this.cancellationHandlerActivity1.Name = "cancellationHandlerActivity1"; // // 正常路径业 // this.正常路径业.Name = "正常路径业"; this.正常路径业.ExecuteCode += new System.EventHandler(this.正常路径业_ExecuteCode); // // 支持取消的控件1 // this.支持取消的控件1.Activities.Add(this.正常路径业); this.支持取消的控件1.Activities.Add(this.cancellationHandlerActivity1); this.支持取消的控件1.Name = "支持取消的控件1"; // // 可取消的容器1 // this.可取消的容器1.Activities.Add(this.支持取消的控件1); this.可取消的容器1.Name = "可取消的容器1"; this.可取消的容器1.是否取消 = true; // // Workflow1 // this.Activities.Add(this.可取消的容器1); this.Name = "Workflow1"; this.CanModifyActivities = false; }
private void 正常路径业_ExecuteCode(object sender, EventArgs e) { System.Console.WriteLine("正常执行"); }
private void 取消业务路径_ExecuteCode(object sender, EventArgs e) { System.Console.WriteLine("取消执行"); } } |
宿主
class Program { static void Main() { WorkflowRuntime workflowRuntime = new WorkflowRuntime(); workflowRuntime.WorkflowCompleted +=new EventHandler<WorkflowCompletedEventArgs>(workflowRuntime_WorkflowCompleted); workflowRuntime.WorkflowTerminated +=new EventHandler<WorkflowTerminatedEventArgs>(workflowRuntime_WorkflowTerminated); workflowRuntime.WorkflowIdled+=new EventHandler<WorkflowEventArgs>(workflowRuntime_WorkflowIdled); WorkflowInstance instance = workflowRuntime.CreateWorkflow(typeof(Workflow1)); instance.Start();
System.Console.Read();
}
static void workflowRuntime_WorkflowIdled(object sender, WorkflowEventArgs e) { System.Console.WriteLine("WorkflowIdled"); }
static void workflowRuntime_WorkflowTerminated(object sender, WorkflowTerminatedEventArgs e) { System.Console.WriteLine("Terminated" + e.Exception.Message); }
static void workflowRuntime_WorkflowCompleted(object sender, WorkflowCompletedEventArgs e) { System.Console.WriteLine("WorkflowCompleted"); }
} |
运行结果
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