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
以下是具体的例子
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 ";
 
&

补充：综合编程 , 其他综合 ,

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