Ниже приведен класс, который достигает, я верю, что вы ищете.
Процесс уже работает асинхронно, я думаю, что вы ищете, это управляемый событиями и скрытый.
Вы специально хотите блокировать вызов по какой-то причине или боитесь потоков?
Если я ухожу с базы и вы хотите, чтобы он заблокировал, дайте мне знать, что мы тоже можем это сделать, хотя я не могу себе представить, почему.
По сути, это позволяет вам создавать оболочку cmd и взаимодействовать с ней незаметно.
#Region " Imports "
Imports System.Threading
Imports System.ComponentModel
#End Region
Namespace Common
Public Class CmdShell
#Region " Variables "
Private WithEvents ShellProcess As Process
#End Region
#Region " Events "
''' <summary>
''' Event indicating an asyc read of the command process's StdOut pipe has occured.
''' </summary>
Public Event DataReceived As EventHandler(Of CmdShellDataReceivedEventArgs)
#End Region
#Region " Public Methods "
Public Sub New()
ThreadPool.QueueUserWorkItem(AddressOf ShellLoop, Nothing)
Do Until Not ShellProcess Is Nothing : Loop
End Sub
''' <param name="Value">String value to write to the StdIn pipe of the command process, (CRLF not required).</param>
Public Sub Write(ByVal value As String)
ShellProcess.StandardInput.WriteLine(value)
End Sub
#End Region
#Region " Private Methods "
Private Sub ShellLoop(ByVal state As Object)
Try
Dim SI As New ProcessStartInfo("cmd.exe")
With SI
.Arguments = "/k"
.RedirectStandardInput = True
.RedirectStandardOutput = True
.RedirectStandardError = True
.UseShellExecute = False
.CreateNoWindow = True
.WorkingDirectory = Environ("windir")
End With
Try
ShellProcess = Process.Start(SI)
With ShellProcess
.BeginOutputReadLine()
.BeginErrorReadLine()
.WaitForExit()
End With
Catch ex As Exception
With ex
Trace.WriteLine(.Message)
Trace.WriteLine(.Source)
Trace.WriteLine(.StackTrace)
End With
End Try
Catch ex As Exception
With ex
Trace.WriteLine(.Message)
Trace.WriteLine(.Source)
Trace.WriteLine(.StackTrace)
End With
End Try
End Sub
Private Sub ShellProcess_ErrorDataReceived(ByVal sender As Object, ByVal e As System.Diagnostics.DataReceivedEventArgs) Handles ShellProcess.ErrorDataReceived
If Not e.Data Is Nothing Then RaiseEvent DataReceived(Me, New CmdShellDataReceivedEventArgs(e.Data))
End Sub
Private Sub ShellProcess_OutputDataReceived(ByVal sender As Object, ByVal e As System.Diagnostics.DataReceivedEventArgs) Handles ShellProcess.OutputDataReceived
If Not e.Data Is Nothing Then RaiseEvent DataReceived(Me, New CmdShellDataReceivedEventArgs(e.Data & Environment.NewLine))
End Sub
#End Region
End Class
<EditorBrowsable(EditorBrowsableState.Never)> _
Public Class CmdShellDataReceivedEventArgs : Inherits EventArgs
Private _Value As String
Public Sub New(ByVal value As String)
_Value = value
End Sub
Public ReadOnly Property Value() As String
Get
Return _Value
End Get
End Property
End Class
End Namespace