/// 
    /// 异步工具类    /// 
    public class TaskTools    {        /// 
        /// 是否 在执行回调函数之前修改Running状态        /// 
        public bool ChangeRunningStateBeforeCallback { get; private set; }        /// 
        /// 是否 正在执行异步任务        /// 
        public bool Running { get; private set; }        public TaskTools()            : this(false)        {        }        /// 
        ///         /// 
        /// 是否 在执行回调函数之前修改Running状态 默认值false        public TaskTools(bool changeRunningStateBeforeCallback)        {            this.ChangeRunningStateBeforeCallback = changeRunningStateBeforeCallback;        }        /// 
        /// 执行异步任务        /// 
        /// 
     
      异步任务返回值类型
             /// 操作UI时需要Invoke的控件        /// 将要执行的任务任务        /// 异步任务执行完毕后执行的回调函数        public void Run
     
      (Control control, Func
      
        asyncFunc, Action
       
         callback)        {            if (this.Running)                throw new InvalidOperationException(" the task is running ");            try            {                this.Running = true;                Task
        
          task = new Task
         
          (() =>                {                    try                    {                        return asyncFunc();                    }                    catch (Exception ex)                    {                        Console.WriteLine(ex.Message);                        return default(T);                    }                });                task.Start();                TaskContinue
          
           (control, task, callback); } catch (Exception ex) { Console.WriteLine(ex.Message); } finally { this.Running = false; } } /// 
           
 /// 执行异步任务 /// 
 /// 
           
            异步任务返回值类型
            /// 
           操作UI时需要Invoke的控件 /// 
           异步任务的传入参数 /// 
           将要执行的任务任务 /// 
           异步任务执行完毕后执行的回调函数 public void Run
           
            (Control control, object args, Func
            
              asyncFunc, Action
             
               callback) { if (this.Running) throw new InvalidOperationException(" the task is running "); try { this.Running = true; Task
              
                task = new Task
               
                ((lambdaObj) => { try { return asyncFunc(lambdaObj); } catch (Exception ex) { Console.WriteLine(ex.Message); return default(T); } }, args); task.Start(); TaskContinue
                
                 (control, task, callback); } catch (Exception ex) { Console.WriteLine(ex.Message); } finally { this.Running = false; } } /// 
                 
 /// 延时执行某任务 /// 
 /// 
                 操作UI时需要Invoke的控件 /// 
                 将要延时执行的毫秒数 /// 
                 异步任务执行完毕后执行的回调函数 public void DelayedRun(int milliSecond, Control control, Action callback) { this.Run
                 
                  (control, () => { Thread.Sleep(milliSecond); // 4.0 类库 return milliSecond; }, (time) => { callback(); }); } /// 
                  
 /// Control.Invoke方法的简易封装 /// 
 /// 
                  
                   参数类型
                   /// 
                   /// 
                   /// 
                   public static void ControlInvoke
                  
                   (Control control, T args, Action
                   
                     action) { try { Invoke
                    
                     (control, args, action); } catch (Exception ex) { Console.WriteLine(ex.Message); } } /// 
                     
 /// 异步任务完成后继续执行... /// 
 /// 
                      /// 
                      /// 
                      /// 
                      private void TaskContinue
                     
                      (Control control, Task
                      
                        task, Action
                       
                         callback) { task.ContinueWith((lambdaAction) => { if (this.ChangeRunningStateBeforeCallback) { this.Running = false; } try { if (callback != null) { // 有UI控件 则将回调函数 注入到UI控件的相关线程中去执行 if (control != null) { TaskTools.Invoke
                        
                         (control, lambdaAction.Result, callback); } else { // 否则在当前线程内执行 回调函数 callback(lambdaAction.Result); } } } catch (Exception ex) { Console.WriteLine(ex.Message); } finally { this.Running = false; } }); } /// 
                         
 /// Control.Invoke方法的简易封装 /// 注意 无 Try Catch /// 
 /// 
                         
                          参数类型
                          /// 
                          /// 
                          /// 
                          private static void Invoke
                         
                          (Control control, T args, Action
                          
                            action) { // control为空，在当前线程内执行该action if (control == null) { action(args); return; } // 控件正在释放或者已经被释放则不执行action if (control.Disposing || control.IsDisposed) return; if (control.InvokeRequired) { control.Invoke(action, new object[] { args }); } else { action(args); } } }