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vb.net的windows窗体实现dos命令

王朝vb·作者佚名  2006-01-09
窄屏简体版  字體: |||超大  

这个例子是从 水如烟的例子 修改过来的。如有不妥之处还请大家指正批评。

Imports System.Threading

Imports System.Runtime.CompilerServices

Public Class frmCmdExcute

Inherits System.Windows.Forms.Form

#Region " Windows 窗体设计器生成的代码 "

Public Sub New()

MyBase.New()

'该调用是 Windows 窗体设计器所必需的。

InitializeComponent()

'在 InitializeComponent() 调用之后添加任何初始化

End Sub

'窗体重写 dispose 以清理组件列表。

Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)

If disposing Then

If Not (components Is Nothing) Then

components.Dispose()

End If

End If

MyBase.Dispose(disposing)

End Sub

'Windows 窗体设计器所必需的

Private components As System.ComponentModel.IContainer

'注意: 以下过程是 Windows 窗体设计器所必需的

'可以使用 Windows 窗体设计器修改此过程。

'不要使用代码编辑器修改它。

Friend WithEvents tbResult As System.Windows.Forms.TextBox

Friend WithEvents Panel1 As System.Windows.Forms.Panel

Friend WithEvents btnExcute As System.Windows.Forms.Button

Friend WithEvents Label1 As System.Windows.Forms.Label

Friend WithEvents btClear As System.Windows.Forms.Button

Friend WithEvents tbComText As System.Windows.Forms.ComboBox

<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()

Me.tbResult = New System.Windows.Forms.TextBox

Me.Panel1 = New System.Windows.Forms.Panel

Me.tbComText = New System.Windows.Forms.ComboBox

Me.btClear = New System.Windows.Forms.Button

Me.Label1 = New System.Windows.Forms.Label

Me.btnExcute = New System.Windows.Forms.Button

Me.Panel1.SuspendLayout()

Me.SuspendLayout()

'

'tbResult

'

Me.tbResult.Anchor = CType((((System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Bottom) _

Or System.Windows.Forms.AnchorStyles.Left) _

Or System.Windows.Forms.AnchorStyles.Right), System.Windows.Forms.AnchorStyles)

Me.tbResult.BackColor = System.Drawing.SystemColors.Info

Me.tbResult.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle

Me.tbResult.Location = New System.Drawing.Point(8, 8)

Me.tbResult.Multiline = True

Me.tbResult.Name = "tbResult"

Me.tbResult.ScrollBars = System.Windows.Forms.ScrollBars.Both

Me.tbResult.Size = New System.Drawing.Size(584, 304)

Me.tbResult.TabIndex = 0

Me.tbResult.Text = ""

'

'Panel1

'

Me.Panel1.Anchor = CType((System.Windows.Forms.AnchorStyles.Bottom Or System.Windows.Forms.AnchorStyles.Right), System.Windows.Forms.AnchorStyles)

Me.Panel1.Controls.Add(Me.tbComText)

Me.Panel1.Controls.Add(Me.btClear)

Me.Panel1.Controls.Add(Me.Label1)

Me.Panel1.Controls.Add(Me.btnExcute)

Me.Panel1.Location = New System.Drawing.Point(8, 320)

Me.Panel1.Name = "Panel1"

Me.Panel1.Size = New System.Drawing.Size(584, 40)

Me.Panel1.TabIndex = 1

'

'tbComText

'

Me.tbComText.Location = New System.Drawing.Point(224, 8)

Me.tbComText.Name = "tbComText"

Me.tbComText.Size = New System.Drawing.Size(224, 20)

Me.tbComText.TabIndex = 5

Me.tbComText.Text = "Dir"

'

'btClear

'

Me.btClear.FlatStyle = System.Windows.Forms.FlatStyle.Flat

Me.btClear.Location = New System.Drawing.Point(40, 8)

Me.btClear.Name = "btClear"

Me.btClear.Size = New System.Drawing.Size(80, 24)

Me.btClear.TabIndex = 3

Me.btClear.Text = "清空(&C)"

'

'Label1

'

Me.Label1.Location = New System.Drawing.Point(160, 8)

Me.Label1.Name = "Label1"

Me.Label1.Size = New System.Drawing.Size(48, 16)

Me.Label1.TabIndex = 2

Me.Label1.Text = "命令:"

'

'btnExcute

'

Me.btnExcute.FlatStyle = System.Windows.Forms.FlatStyle.Flat

Me.btnExcute.Location = New System.Drawing.Point(472, 8)

Me.btnExcute.Name = "btnExcute"

Me.btnExcute.Size = New System.Drawing.Size(80, 24)

Me.btnExcute.TabIndex = 1

Me.btnExcute.Text = "执行(&E)"

'

'frmCmdExcute

'

Me.AcceptButton = Me.btnExcute

Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)

Me.ClientSize = New System.Drawing.Size(600, 365)

Me.Controls.Add(Me.Panel1)

Me.Controls.Add(Me.tbResult)

Me.Name = "frmCmdExcute"

Me.Text = "Command Excute Result"

Me.Panel1.ResumeLayout(False)

Me.ResumeLayout(False)

End Sub

#End Region

Public Shared Sub Main()

If System.Environment.OSVersion.ToString.IndexOf("NT") = -1 Then

MsgBox("暂时不支持非NT系统,程序退出!")

Application.Exit()

Else

Application.Run(New frmCmdExcute)

End If

End Sub

Private Delegate Sub TextAddHandler(ByVal strPara As String)

#Region "private viable"

Dim sw As IO.StreamWriter

Dim sr As New MyStreamReader

Dim err As New MyStreamReader

Dim p As System.Diagnostics.Process = New System.Diagnostics.Process

Dim psI As New System.Diagnostics.ProcessStartInfo(System.Environment.GetEnvironmentVariable("ComSpec"))

#End Region

Private Sub frmCmdExcute_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

p = New System.Diagnostics.Process

'"cmd.exe"为nt的命令行程序

psI = New System.Diagnostics.ProcessStartInfo("cmd.exe")

psI.UseShellExecute = False

psI.RedirectStandardInput = True

psI.RedirectStandardOutput = True

psI.RedirectStandardError = True

psI.CreateNoWindow = True

p.StartInfo = psI

p.Start()

sw = p.StandardInput

sr.stream = p.StandardOutput

err.stream = p.StandardError

sw.AutoFlush = True

sr.stream.BaseStream.BeginRead(sr.bytes, 0, 1024, New AsyncCallback(AddressOf CBstream), sr)

err.stream.BaseStream.BeginRead(err.bytes, 0, 1024, New AsyncCallback(AddressOf CBstream), err)

End Sub

Private Sub frmCmdExcute_Closed(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Closed

p.Close()

If Not sw Is Nothing Then

sw.Close()

End If

If Not sr Is Nothing Then

sr.stream.Close()

End If

If Not err Is Nothing Then

err.stream.Close()

End If

End Sub

Private Sub btClear_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btClear.Click

Me.tbResult.Text = String.Empty

End Sub

Private Sub btnExcute_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnExcute.Click

Me.CmdExcute()

End Sub

Private Sub CmdExcute()

Try

Me.Cursor = System.Windows.Forms.Cursors.WaitCursor

If Me.tbComText.Text <> "" Then

sw.WriteLine(Me.tbComText.Text)

Else

sw.WriteLine("Dir")

End If

Me.Cursor = System.Windows.Forms.Cursors.Default

'向combobox中添加元素

Me.tbComText.Items.Add(Me.tbComText.Text)

Me.tbComText.SelectionStart = 0

Me.tbComText.SelectionLength = Me.tbComText.Text.Length

Me.tbComText.Focus()

Catch ex As Exception

MsgBox("CmdExcute--" & ex.ToString)

End Try

End Sub

Private Sub AppText(ByVal strAdd As String)

Me.tbResult.Text &= strAdd

End Sub

'回调函数

'为了保证执行invoke方法的线程顺序,使用了MethodImpl

<MethodImpl(MethodImplOptions.Synchronized)> _

Sub CBstream(ByVal s As IAsyncResult)

Try

Dim t As MyStreamReader = CType(s.AsyncState, MyStreamReader)

If t.stream.BaseStream Is Nothing Then

Exit Sub

End If

Dim i As Integer = t.stream.BaseStream.EndRead(s)

Dim strReceive As String = System.Text.Encoding.Default.GetString(t.bytes, 0, i)

Me.Invoke(New TextAddHandler(AddressOf AppText), New Object() {strReceive})

t.stream.BaseStream.BeginRead(t.bytes, 0, 1024, New AsyncCallback(AddressOf CBstream), t)

Catch ex As Exception

MsgBox("CBstream--" & ex.ToString)

End Try

End Sub

Friend Class MyStreamReader

Public stream As IO.StreamReader

Public bytes(1024) As Byte

Public Sub New()

End Sub

End Class

End Class

 
 
 
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