几种异步方法编程举例

此文主要是通过具体例子简述AsyncCallback ,BackgroundWorker ,web service的异步方法编程

 1. Handheld Program 使用AsyncCallback

2. winform Program 使用AsyncCallback

3. 使用BackgroundWorker

4. 使用web service的异步方法

usingSystem;

usingSystem.Collections.Generic;

usingSystem.Linq;

usingSystem.Text;

usingSystem.Threading;

usingSystem.ComponentModel;

usingSystem.Windows.Forms;

usingSystem.Xml;

usingSystem.Xml.Linq;

 

namespaceTestAPP

{

   publicclassEntity

   {

       publicintOperatorID {get; set; }

       publicstringOperatorName {get; set; }

       publicstringBlock {get; set; }

       publicstringFloor {get; set; }

   }

 

   public delegate Object Asyncdelegate();

    public class CallBack

   {

       //1. Handheld Program 使用AsyncCallback

       public delegate void taskstatusDel(objectStatusList); 

       private void BindcboStatus(objectStatusList)

       {

           List<ManualTask.TaskStatus> _taskstatus = newList<ManualTask.TaskStatus>();

           _taskstatus = StatusList asList<ManualTask.TaskStatus>;

 

           ManualTask.TaskStatus_statusObj = newManualTask.TaskStatus();

           _statusObj.StatusCode = "";

           _statusObj.StatusDesc = "";

           _taskstatus.Insert(0, _statusObj);

 

           ComboBoxcboStatus = newComboBox();

           cboStatus.DataSource = _taskstatus;

           cboStatus.DisplayMember = "StatusDesc";

           cboStatus.ValueMember = "StatusCode";

           cboStatus.SelectedIndex = -1;

       }

 

       private void CallbackHandheld(IAsyncResultar)

       {

 

           List<ManualTask.TaskStatus> _taskstatus = newList<ManualTask.TaskStatus>();

 

           _taskstatus = _taskService.EndGetTaskStatus(ar).ToList();

 

           this.BeginInvoke(newtaskstatusDel(BindcboStatus), _taskstatus);

        }

 

       private void BindTaskStatus(stringstatusCode)

       {

           ManualTask.RLDMSManualSendTaskServicetaskService = newManualTask.RLDMSManualSendTaskService();

           taskService.BeginGetTaskStatus(statusCode, new AsyncCallback(CallbackHandheld), this);

 

       }

 

      //2. winform Program 使用AsyncCallback

       Object GetDriverList()

       {

 ManualTask.RLDMSManualSendTaskServicetaskService = newManualTask.RLDMSManualSendTaskService();

           List<ManualTask.DriverEntity> driver = newList<ManualTask.DriverEntity>();

 

           Entity_entity = newEntity();

           _entity.OperatorID = 0;

           _entity.OperatorName = "";

           _entity.Block = "4´Á ";

           _entity.Floor = "1¼Ó ";

           driver = taskService.GetDriver(_entity.OperatorID, _entity.OperatorName, _entity.Block, _entity.Floor).ToList(); 

           return driver;

       }

       private void CallbackMethod(IAsyncResultar)

       {

           // Retrieve the delegate.

           Asyncdelegate dlgt = (Asyncdelegate)ar.AsyncState;

           // Call EndInvoke to retrieve the results.

           List<ManualTask.DriverEntity> driver = newList<ManualTask.DriverEntity>();

           driver=dlgt.EndInvoke(ar) asList<ManualTask.DriverEntity> ; 

           MessageBox.Show("End");~~

       }

 

       public void MainCallBack()

       {

           Asyncdelegateisgt = newAsyncdelegate(GetDriverList);

           AsyncCallbackacb = new AsyncCallback(CallbackMethod);

           IAsyncResultar = isgt.BeginInvoke(acb, isgt);

           MessageBox.Show("Start");~~

       }

 

 

       //3. 使用BackgroundWorker

       publicvoidMainMethod()

       {

           BackgroundWorkerbackworker = newBackgroundWorker();

           backworker.DoWork += newDoWorkEventHandler(Method1);

           backworker.RunWorkerCompleted += newRunWorkerCompletedEventHandler(back_RunWorkerCompleted);

 

           Entity_entity = newEntity();

           _entity.OperatorID = 0;

           _entity.OperatorName = "";

           _entity.Block = "4´Á ";

           _entity.Floor = "1¼Ó ";

 

           backworker.RunWorkerAsync(_entity);

 

           MessageBox.Show("Start");~~

 

       }

 

 

       public void Method1(objectsender,DoWorkEventArgse)

       {

           ManualTask.RLDMSManualSendTaskServicetaskService = newManualTask.RLDMSManualSendTaskService();

           List<ManualTask.DriverEntity> driver = newList<ManualTask.DriverEntity>();

           Entity_entity = newEntity();

           _entity = e.Argument asEntity;

 

           driver = taskService.GetDriver(_entity .OperatorID ,_entity .OperatorName ,_entity .Block ,_entity .Floor ).ToList();

           e.Result = driver;

       }

 

       //§¹¦¨¨Æ¥ó~

       void back_RunWorkerCompleted(objectsender, RunWorkerCompletedEventArgs e)

       {

           if(e.Error != null)

               throwe.Error;

 

           List<ManualTask.DriverEntity> driver = newList<ManualTask.DriverEntity>();

           driver = e.Result as List<ManualTask.DriverEntity>;

 

           MessageBox.Show("OK");~~

       }

 

 

       //4. 使用web service的异步方法

       public void CallWebService()

       {

           ManualTask.RLDMSManualSendTaskServicetaskService = newManualTask.RLDMSManualSendTaskService();

 

           Entity_entity = newEntity();

           _entity.OperatorID = 0;

           _entity.OperatorName = "";

           _entity.Block = "4t ";

           _entity.Floor = "1f";

  taskService.GetDriverAsync(_entity.OperatorID, _entity.OperatorName, _entity.Block, _entity.Floor);

 

           taskService.GetDriverCompleted += newTestAPP.ManualTask.GetDriverCompletedEventHandler(GetDriverCompleted);

           //driver = taskService.GetDriver(_entity.OperatorID, _entity.OperatorName, _entity.Block, _entity.Floor).ToList();

           MessageBox.Show("Start");~

 

       }

 

       //§¹¦¨¨Æ¥ó‰]²z¤èªk~

       void GetDriverCompleted(objectsender, ManualTask .GetDriverCompletedEventArgse)

       {

           if(e.Error != null)

               throwe.Error;

 

           List<ManualTask.DriverEntity> driver = newList<ManualTask.DriverEntity>();

           driver = e.Result.ToList();

           MessageBox.Show("Finish");~~~//显¥ÜŸÏªA‰U¾¹获¨úªº结ªG È~

       }~

 

   }

}