本文整理汇总了VB.NET中System.Threading.Tasks.Task.Task构造函数的典型用法代码示例。如果您正苦于以下问题：VB.NET Task构造函数的具体用法？VB.NET Task怎么用？VB.NET Task使用的例子？那么恭喜您, 这里精选的构造函数代码示例或许可以为您提供帮助。您也可以进一步了解该构造函数所在类System.Threading.Tasks.Task的用法示例。
在下文中一共展示了Task构造函数的4个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的VB.NET代码示例。
示例1: Example
' 导入命名空间
Imports System.Collections.Concurrent
Imports System.Collections.Generic
Imports System.IO
Imports System.Threading.Tasks
Module Example
Public Sub Main()
Dim list As New ConcurrentBag(Of String)()
Dim dirNames() As String = { ".", ".." }
Dim tasks As New List(Of Task)()
For Each dirName In dirNames
Dim t As New Task( Sub()
For Each path In Directory.GetFiles(dirName)
list.Add(path)
Next
End Sub )
tasks.Add(t)
t.Start()
Next
Task.WaitAll(tasks.ToArray())
For Each t In tasks
Console.WriteLine("Task {0} Status: {1}", t.Id, t.Status)
Next
Console.WriteLine("Number of files read: {0}", list.Count)
End Sub
End Module
开发者ID:VB.NET开发者，项目名称:System.Threading.Tasks，代码行数:27，代码来源:Task 输出：
Task 1 Status: RanToCompletion
Task 2 Status: RanToCompletion
Number of files read: 23
示例2: Example
' 导入命名空间
Imports System.Collections.Concurrent
Imports System.Collections.Generic
Imports System.IO
Imports System.Threading.Tasks
Module Example
Public Sub Main()
Dim list As New ConcurrentBag(Of String)()
Dim dirNames() As String = { ".", ".." }
Dim tasks As New List(Of Task)()
For Each dirName In dirNames
Dim t As Task = Task.Run( Sub()
For Each path In Directory.GetFiles(dirName)
list.Add(path)
Next
End Sub )
tasks.Add(t)
Next
Task.WaitAll(tasks.ToArray())
For Each t In tasks
Console.WriteLine("Task {0} Status: {1}", t.Id, t.Status)
Next
Console.WriteLine("Number of files read: {0}", list.Count)
End Sub
End Module
开发者ID:VB.NET开发者，项目名称:System.Threading.Tasks，代码行数:26，代码来源:Task 输出：
Task 1 Status: RanToCompletion
Task 2 Status: RanToCompletion
Number of files read: 23
示例3: Example
' 导入命名空间
Imports System.Collections.Generic
Imports System.IO
Imports System.Threading
Imports System.Threading.Tasks
Module Example
Public Sub Main()
Dim tokenSource As New CancellationTokenSource()
Dim token As CancellationToken = tokenSource.Token
Dim files As New List(Of Tuple(Of String, String, Long, Date))()
Dim t As New Task(Sub()
Dim dir As String = "C:\Windows\System32\"
Dim obj As New Object()
If Directory.Exists(dir)Then
Parallel.ForEach(Directory.GetFiles(dir),
Sub(f)
If token.IsCancellationRequested Then
token.ThrowIfCancellationRequested()
End If
Dim fi As New FileInfo(f)
SyncLock(obj)
files.Add(Tuple.Create(fi.Name, fi.DirectoryName, fi.Length, fi.LastWriteTimeUtc))
End SyncLock
End Sub)
End If
End Sub, token)
t.Start()
tokenSource.Cancel()
Try
t.Wait()
Console.WriteLine("Retrieved information for {0} files.", files.Count)
Catch e As AggregateException
Console.WriteLine("Exception messages:")
For Each ie As Exception In e.InnerExceptions
Console.WriteLine(" {0}:{1}", ie.GetType().Name, ie.Message)
Next
Console.WriteLine()
Console.WriteLine("Task status: {0}", t.Status)
Finally
tokenSource.Dispose()
End Try
End Sub
End Module
开发者ID:VB.NET开发者，项目名称:System.Threading.Tasks，代码行数:44，代码来源:Task 输出：
Exception messages:
TaskCanceledException: A task was canceled.
Task status: Canceled
示例4: Example
' 导入命名空间
Imports System.Collections.Generic
Imports System.Threading.Tasks
Module Example
Public Sub Main()
Dim tasks As New List(Of Task)()
Dim rnd As New Random()
Dim lockObj As New Object()
Dim words6() As String = { "reason", "editor", "rioter", "rental",
"senior", "regain", "ordain", "rained" }
For Each word6 in words6
Dim t As New Task( Sub(word)
Dim chars() As Char = word.ToString().ToCharArray()
Dim order(chars.Length - 1) As Double
SyncLock lockObj
For ctr As Integer = 0 To order.Length - 1
order(ctr) = rnd.NextDouble()
Next
End SyncLock
Array.Sort(order, chars)
Console.WriteLine("{0} --> {1}", word,
New String(chars))
End Sub, word6)
t.Start()
tasks.Add(t)
Next
Task.WaitAll(tasks.ToArray())
End Sub
End Module
开发者ID:VB.NET开发者，项目名称:System.Threading.Tasks，代码行数:31，代码来源:Task 输出：
regain --> irnaeg
ordain --> rioadn
reason --> soearn
rained --> rinade
rioter --> itrore
senior --> norise
rental --> atnerl
editor --> oteird
注：本文中的System.Threading.Tasks.Task.Task构造函数示例由纯净天空整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。 |
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