當前位置: 首頁>>代碼示例>>VB.NET>>正文


VB.NET Task.Delay方法代碼示例

本文整理匯總了VB.NET中System.Threading.Tasks.Task.Delay方法的典型用法代碼示例。如果您正苦於以下問題:VB.NET Task.Delay方法的具體用法?VB.NET Task.Delay怎麽用?VB.NET Task.Delay使用的例子?那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在System.Threading.Tasks.Task的用法示例。


在下文中一共展示了Task.Delay方法的6個代碼示例,這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚,您的評價將有助於係統推薦出更棒的VB.NET代碼示例。

示例1: Example

' 導入命名空間
Imports System.Threading
Imports System.Threading.Tasks

Module Example
   Public Sub Main()
      Dim source As New CancellationTokenSource()
      
      Dim t = Task.Run(Async Function()
                                Await Task.Delay(TimeSpan.FromSeconds(1.5),
                                                 source.Token)
                                Return 42
                       End Function)
      source.Cancel()
      Try
         t.Wait()
      Catch ae As AggregateException
         For Each e In ae.InnerExceptions
            Console.WriteLine("{0}: {1}", e.GetType().Name, e.Message)
         Next
      End Try
      Console.Write("Task t Status: {0}", t.Status)
      If t.Status = TaskStatus.RanToCompletion Then
         Console.Write(", Result: {0}", t.Result)
      End If
      source.Dispose()
   End Sub
End Module
開發者ID:VB.NET開發者,項目名稱:System.Threading.Tasks,代碼行數:28,代碼來源:Task.Delay

輸出:

TaskCanceledException: A task was canceled.
Task t Status: Canceled

示例2: Example

' 導入命名空間
Imports System.Threading
Imports System.Threading.Tasks

Module Example
   Public Sub Main()
      Dim source As New CancellationTokenSource()
      
      Dim t = Task.Run(Async Function()
                                Await Task.Delay(1000, source.Token)
                                Return 42
                       End Function)
      source.Cancel()
      Try
         t.Wait()
      Catch ae As AggregateException
         For Each e In ae.InnerExceptions
            Console.WriteLine("{0}: {1}", e.GetType().Name, e.Message)
         Next
      End Try
      Console.Write("Task t Status: {0}", t.Status)
      If t.Status = TaskStatus.RanToCompletion Then
         Console.Write(", Result: {0}", t.Result)
      End If
      source.Dispose()
   End Sub
End Module
開發者ID:VB.NET開發者,項目名稱:System.Threading.Tasks,代碼行數:27,代碼來源:Task.Delay

輸出:

TaskCanceledException: A task was canceled.
Task t Status: Canceled

示例3: Example

' 導入命名空間
Imports System.Threading.Tasks

Module Example
   Public Sub Main()
      Dim t = Task.Run(Async Function()
                                Await Task.Delay(1000)
                                Return 42
                       End Function)
      t.Wait()
      Console.WriteLine("Task t Status: {0}, Result: {1}",
                        t.Status, t.Result)
   End Sub
End Module
開發者ID:VB.NET開發者,項目名稱:System.Threading.Tasks,代碼行數:14,代碼來源:Task.Delay

輸出:

Task t Status: RanToCompletion, Result: 42

示例4: Function

Dim sw As Stopwatch = Stopwatch.StartNew()
Dim delay1 = Task.Delay(1000)
Dim delay2 = delay1.ContinueWith( Function(antecedent)
                        sw.Stop()
                        Return sw.ElapsedMilliseconds
                      End Function)

Console.WriteLine("Elapsed milliseconds: {0}", delay2.Result)
開發者ID:VB.NET開發者,項目名稱:System.Threading.Tasks,代碼行數:8,代碼來源:Task.Delay

輸出:

Elapsed milliseconds: 1013

示例5: Function

Dim delay = Task.Run( Async Function()
                         Dim sw As Stopwatch = Stopwatch.StartNew()
                         Await Task.Delay(2500)
                         sw.Stop()
                         Return sw.ElapsedMilliseconds
                      End Function )

Console.WriteLine("Elapsed milliseconds: {0}", delay.Result)
開發者ID:VB.NET開發者,項目名稱:System.Threading.Tasks,代碼行數:8,代碼來源:Task.Delay

輸出:

Elapsed milliseconds: 2501

示例6: Example

' 導入命名空間
Imports System.Threading.Tasks

Module Example
   Public Sub Main()
      Dim t = Task.Run(Async Function()
                                Await Task.Delay(TimeSpan.FromSeconds(1.5))
                                Return 42
                       End Function)
      t.Wait()
      Console.WriteLine("Task t Status: {0}, Result: {1}",
                        t.Status, t.Result)
   End Sub
End Module
開發者ID:VB.NET開發者,項目名稱:System.Threading.Tasks,代碼行數:14,代碼來源:Task.Delay

輸出:

Task t Status: RanToCompletion, Result: 42


注:本文中的System.Threading.Tasks.Task.Delay方法示例由純淨天空整理自Github/MSDocs等開源代碼及文檔管理平台,相關代碼片段篩選自各路編程大神貢獻的開源項目,源碼版權歸原作者所有,傳播和使用請參考對應項目的License;未經允許,請勿轉載。