本文整理匯總了VB.NET中System.Threading.WaitHandle.WaitAll方法的典型用法代碼示例。如果您正苦於以下問題：VB.NET WaitHandle.WaitAll方法的具體用法？VB.NET WaitHandle.WaitAll怎麽用？VB.NET WaitHandle.WaitAll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類System.Threading.WaitHandle的用法示例。
在下文中一共展示了WaitHandle.WaitAll方法的3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: Test
' 導入命名空間
Imports System.IO
Imports System.Security.Permissions
Imports System.Threading
Public Class Test
' WaitHandle.WaitAll requires a multithreaded apartment
' when using multiple wait handles.
<MTAThreadAttribute> _
Shared Sub Main()
Const numberOfFiles As Integer = 5
Dim dirName As String = "C:\TestTest"
Dim fileName As String
Dim byteArray() As Byte
Dim randomGenerator As New Random()
Dim manualEvents(numberOfFiles - 1) As ManualResetEvent
Dim stateInfo As State
If Directory.Exists(dirName) <> True Then
Directory.CreateDirectory(dirName)
End If
' Queue the work items that create and write to the files.
For i As Integer = 0 To numberOfFiles - 1
fileName = String.Concat( _
dirName, "\Test", i.ToString(), ".dat")
' Create random data to write to the file.
byteArray = New Byte(1000000){}
randomGenerator.NextBytes(byteArray)
manualEvents(i) = New ManualResetEvent(false)
stateInfo = _
New State(fileName, byteArray, manualEvents(i))
ThreadPool.QueueUserWorkItem(AddressOf _
Writer.WriteToFile, stateInfo)
Next i
' Since ThreadPool threads are background threads,
' wait for the work items to signal before exiting.
If WaitHandle.WaitAll( _
manualEvents, New TimeSpan(0, 0, 5), false) = True Then
Console.WriteLine("Files written - main exiting.")
Else
' The wait operation times out.
Console.WriteLine("Error writing files - main exiting.")
End If
End Sub
End Class
' Maintain state to pass to WriteToFile.
Public Class State
Public fileName As String
Public byteArray As Byte()
Public manualEvent As ManualResetEvent
Sub New(fileName As String, byteArray() As Byte, _
manualEvent As ManualResetEvent)
Me.fileName = fileName
Me.byteArray = byteArray
Me.manualEvent = manualEvent
End Sub
End Class
Public Class Writer
Private Sub New()
End Sub
Shared workItemCount As Integer = 0
Shared Sub WriteToFile(state As Object)
Dim workItemNumber As Integer = workItemCount
Interlocked.Increment(workItemCount)
Console.WriteLine("Starting work item {0}.", _
workItemNumber.ToString())
Dim stateInfo As State = CType(state, State)
Dim fileWriter As FileStream = Nothing
' Create and write to the file.
Try
fileWriter = New FileStream( _
stateInfo.fileName, FileMode.Create)
fileWriter.Write(stateInfo.byteArray, _
0, stateInfo.byteArray.Length)
Finally
If Not fileWriter Is Nothing Then
fileWriter.Close()
End If
' Signal Main that the work item has finished.
Console.WriteLine("Ending work item {0}.", _
workItemNumber.ToString())
stateInfo.manualEvent.Set()
End Try
End Sub
End Class示例2: Test
' 導入命名空間
Imports System.IO
Imports System.Security.Permissions
Imports System.Threading
Public Class Test
' WaitHandle.WaitAll requires a multithreaded apartment
' when using multiple wait handles.
<MTAThreadAttribute> _
Shared Sub Main()
Const numberOfFiles As Integer = 5
Dim dirName As String = "C:\TestTest"
Dim fileName As String
Dim byteArray() As Byte
Dim randomGenerator As New Random()
Dim manualEvents(numberOfFiles - 1) As ManualResetEvent
Dim stateInfo As State
If Directory.Exists(dirName) <> True Then
Directory.CreateDirectory(dirName)
End If
' Queue the work items that create and write to the files.
For i As Integer = 0 To numberOfFiles - 1
fileName = String.Concat( _
dirName, "\Test", i.ToString(), ".dat")
' Create random data to write to the file.
byteArray = New Byte(1000000){}
randomGenerator.NextBytes(byteArray)
manualEvents(i) = New ManualResetEvent(false)
stateInfo = _
New State(fileName, byteArray, manualEvents(i))
ThreadPool.QueueUserWorkItem(AddressOf _
Writer.WriteToFile, stateInfo)
Next i
' Since ThreadPool threads are background threads,
' wait for the work items to signal before exiting.
If WaitHandle.WaitAll(manualEvents, 5000, false) = True Then
Console.WriteLine("Files written - main exiting.")
Else
' The wait operation times out.
Console.WriteLine("Error writing files - main exiting.")
End If
End Sub
End Class
' Maintain state to pass to WriteToFile.
Public Class State
Public fileName As String
Public byteArray As Byte()
Public manualEvent As ManualResetEvent
Sub New(fileName As String, byteArray() As Byte, _
manualEvent As ManualResetEvent)
Me.fileName = fileName
Me.byteArray = byteArray
Me.manualEvent = manualEvent
End Sub
End Class
Public Class Writer
Private Sub New()
End Sub
Shared workItemCount As Integer = 0
Shared Sub WriteToFile(state As Object)
Dim workItemNumber As Integer = workItemCount
Interlocked.Increment(workItemCount)
Console.WriteLine("Starting work item {0}.", _
workItemNumber.ToString())
Dim stateInfo As State = CType(state, State)
Dim fileWriter As FileStream = Nothing
' Create and write to the file.
Try
fileWriter = New FileStream( _
stateInfo.fileName, FileMode.Create)
fileWriter.Write(stateInfo.byteArray, _
0, stateInfo.byteArray.Length)
Finally
If Not fileWriter Is Nothing Then
fileWriter.Close()
End If
' Signal Main that the work item has finished.
Console.WriteLine("Ending work item {0}.", _
workItemNumber.ToString())
stateInfo.manualEvent.Set()
End Try
End Sub
End Class示例3: Test
' 導入命名空間
Imports System.IO
Imports System.Security.Permissions
Imports System.Threading
Public Class Test
' WaitHandle.WaitAll requires a multithreaded apartment
' when using multiple wait handles.
<MTAThreadAttribute> _
Shared Sub Main()
Const numberOfFiles As Integer = 5
Dim dirName As String = "C:\TestTest"
Dim fileName As String
Dim byteArray() As Byte
Dim randomGenerator As New Random()
Dim manualEvents(numberOfFiles - 1) As ManualResetEvent
Dim stateInfo As State
If Directory.Exists(dirName) <> True Then
Directory.CreateDirectory(dirName)
End If
' Queue the work items that create and write to the files.
For i As Integer = 0 To numberOfFiles - 1
fileName = String.Concat( _
dirName, "\Test", i.ToString(), ".dat")
' Create random data to write to the file.
byteArray = New Byte(1000000){}
randomGenerator.NextBytes(byteArray)
manualEvents(i) = New ManualResetEvent(false)
stateInfo = _
New State(fileName, byteArray, manualEvents(i))
ThreadPool.QueueUserWorkItem(AddressOf _
Writer.WriteToFile, stateInfo)
Next i
' Since ThreadPool threads are background threads,
' wait for the work items to signal before exiting.
WaitHandle.WaitAll(manualEvents)
Console.WriteLine("Files written - main exiting.")
End Sub
End Class
' Maintain state to pass to WriteToFile.
Public Class State
Public fileName As String
Public byteArray As Byte()
Public manualEvent As ManualResetEvent
Sub New(fileName As String, byteArray() As Byte, _
manualEvent As ManualResetEvent)
Me.fileName = fileName
Me.byteArray = byteArray
Me.manualEvent = manualEvent
End Sub
End Class
Public Class Writer
Private Sub New()
End Sub
Shared workItemCount As Integer = 0
Shared Sub WriteToFile(state As Object)
Dim workItemNumber As Integer = workItemCount
Interlocked.Increment(workItemCount)
Console.WriteLine("Starting work item {0}.", _
workItemNumber.ToString())
Dim stateInfo As State = CType(state, State)
Dim fileWriter As FileStream = Nothing
' Create and write to the file.
Try
fileWriter = New FileStream( _
stateInfo.fileName, FileMode.Create)
fileWriter.Write(stateInfo.byteArray, _
0, stateInfo.byteArray.Length)
Finally
If Not fileWriter Is Nothing Then
fileWriter.Close()
End If
' Signal Main that the work item has finished.
Console.WriteLine("Ending work item {0}.", _
workItemNumber.ToString())
stateInfo.manualEvent.Set()
End Try
End Sub
End Class