vb.net的windows窗体实现dos命令

  1<system.diagnostics.debuggerstepthrough()> Private Sub InitializeComponent()   
  2Me.tbResult = New System.Windows.Forms.TextBox   
  3Me.Panel1 = New System.Windows.Forms.Panel   
  4Me.tbComText = New System.Windows.Forms.ComboBox   
  5Me.btClear = New System.Windows.Forms.Button   
  6Me.Label1 = New System.Windows.Forms.Label   
  7Me.btnExcute = New System.Windows.Forms.Button   
  8Me.Panel1.SuspendLayout()   
  9Me.SuspendLayout()   
 10'   
 11'tbResult   
 12'   
 13Me.tbResult.Anchor = CType((((System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Bottom) _   
 14Or System.Windows.Forms.AnchorStyles.Left) _   
 15Or System.Windows.Forms.AnchorStyles.Right), System.Windows.Forms.AnchorStyles)   
 16Me.tbResult.BackColor = System.Drawing.SystemColors.Info   
 17Me.tbResult.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle   
 18Me.tbResult.Location = New System.Drawing.Point(8, 8)   
 19Me.tbResult.Multiline = True   
 20Me.tbResult.Name = "tbResult"   
 21Me.tbResult.ScrollBars = System.Windows.Forms.ScrollBars.Both   
 22Me.tbResult.Size = New System.Drawing.Size(584, 304)   
 23Me.tbResult.TabIndex = 0   
 24Me.tbResult.Text = ""   
 25'   
 26'Panel1   
 27'   
 28Me.Panel1.Anchor = CType((System.Windows.Forms.AnchorStyles.Bottom Or System.Windows.Forms.AnchorStyles.Right), System.Windows.Forms.AnchorStyles)   
 29Me.Panel1.Controls.Add(Me.tbComText)   
 30Me.Panel1.Controls.Add(Me.btClear)   
 31Me.Panel1.Controls.Add(Me.Label1)   
 32Me.Panel1.Controls.Add(Me.btnExcute)   
 33Me.Panel1.Location = New System.Drawing.Point(8, 320)   
 34Me.Panel1.Name = "Panel1"   
 35Me.Panel1.Size = New System.Drawing.Size(584, 40)   
 36Me.Panel1.TabIndex = 1   
 37'   
 38'tbComText   
 39'   
 40Me.tbComText.Location = New System.Drawing.Point(224, 8)   
 41Me.tbComText.Name = "tbComText"   
 42Me.tbComText.Size = New System.Drawing.Size(224, 20)   
 43Me.tbComText.TabIndex = 5   
 44Me.tbComText.Text = "Dir"   
 45'   
 46'btClear   
 47'   
 48Me.btClear.FlatStyle = System.Windows.Forms.FlatStyle.Flat   
 49Me.btClear.Location = New System.Drawing.Point(40, 8)   
 50Me.btClear.Name = "btClear"   
 51Me.btClear.Size = New System.Drawing.Size(80, 24)   
 52Me.btClear.TabIndex = 3   
 53Me.btClear.Text = "清空(&amp;C)"   
 54'   
 55'Label1   
 56'   
 57Me.Label1.Location = New System.Drawing.Point(160, 8)   
 58Me.Label1.Name = "Label1"   
 59Me.Label1.Size = New System.Drawing.Size(48, 16)   
 60Me.Label1.TabIndex = 2   
 61Me.Label1.Text = "命令："   
 62'   
 63'btnExcute   
 64'   
 65Me.btnExcute.FlatStyle = System.Windows.Forms.FlatStyle.Flat   
 66Me.btnExcute.Location = New System.Drawing.Point(472, 8)   
 67Me.btnExcute.Name = "btnExcute"   
 68Me.btnExcute.Size = New System.Drawing.Size(80, 24)   
 69Me.btnExcute.TabIndex = 1   
 70Me.btnExcute.Text = "执行(&amp;E)"   
 71'   
 72'frmCmdExcute   
 73'   
 74Me.AcceptButton = Me.btnExcute   
 75Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)   
 76Me.ClientSize = New System.Drawing.Size(600, 365)   
 77Me.Controls.Add(Me.Panel1)   
 78Me.Controls.Add(Me.tbResult)   
 79Me.Name = "frmCmdExcute"   
 80Me.Text = "Command Excute Result"   
 81Me.Panel1.ResumeLayout(False)   
 82Me.ResumeLayout(False) 
 83
 84End Sub 
 85
 86#End Region 
 87
 88Public Shared Sub Main()   
 89If System.Environment.OSVersion.ToString.IndexOf("NT") = -1 Then   
 90MsgBox("暂时不支持非NT系统,程序退出！")   
 91Application.Exit()   
 92Else   
 93Application.Run(New frmCmdExcute)   
 94End If   
 95End Sub 
 96
 97Private Delegate Sub TextAddHandler(ByVal strPara As String) 
 98
 99#Region "private viable"   
100Dim sw As IO.StreamWriter   
101Dim sr As New MyStreamReader   
102Dim err As New MyStreamReader   
103Dim p As System.Diagnostics.Process = New System.Diagnostics.Process   
104Dim psI As New System.Diagnostics.ProcessStartInfo(System.Environment.GetEnvironmentVariable("ComSpec"))   
105#End Region 
106
107Private Sub frmCmdExcute_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load   
108p = New System.Diagnostics.Process   
109'"cmd.exe"为nt的命令行程序   
110psI = New System.Diagnostics.ProcessStartInfo("cmd.exe")   
111psI.UseShellExecute = False   
112psI.RedirectStandardInput = True   
113psI.RedirectStandardOutput = True   
114psI.RedirectStandardError = True   
115psI.CreateNoWindow = True   
116p.StartInfo = psI 
117
118p.Start()   
119sw = p.StandardInput   
120sr.stream = p.StandardOutput   
121err.stream = p.StandardError   
122sw.AutoFlush = True   
123sr.stream.BaseStream.BeginRead(sr.bytes, 0, 1024, New AsyncCallback(AddressOf CBstream), sr)   
124err.stream.BaseStream.BeginRead(err.bytes, 0, 1024, New AsyncCallback(AddressOf CBstream), err)   
125End Sub 
126
127Private Sub frmCmdExcute_Closed(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Closed   
128p.Close()   
129If Not sw Is Nothing Then   
130sw.Close()   
131End If   
132If Not sr Is Nothing Then   
133sr.stream.Close()   
134End If   
135If Not err Is Nothing Then   
136err.stream.Close()   
137End If 
138
139End Sub 
140
141Private Sub btClear_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btClear.Click   
142Me.tbResult.Text = String.Empty   
143End Sub 
144
145Private Sub btnExcute_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnExcute.Click   
146Me.CmdExcute()   
147End Sub 
148
149Private Sub CmdExcute()   
150Try   
151Me.Cursor = System.Windows.Forms.Cursors.WaitCursor   
152If Me.tbComText.Text &lt;&gt; "" Then   
153sw.WriteLine(Me.tbComText.Text)   
154Else   
155sw.WriteLine("Dir")   
156End If   
157Me.Cursor = System.Windows.Forms.Cursors.Default 
158
159'向combobox中添加元素   
160Me.tbComText.Items.Add(Me.tbComText.Text)   
161Me.tbComText.SelectionStart = 0   
162Me.tbComText.SelectionLength = Me.tbComText.Text.Length   
163Me.tbComText.Focus()   
164Catch ex As Exception   
165MsgBox("CmdExcute--" &amp; ex.ToString)   
166End Try   
167End Sub 
168
169Private Sub AppText(ByVal strAdd As String)   
170Me.tbResult.Text &amp;= strAdd   
171End Sub 
172
173'回调函数   
174'为了保证执行invoke方法的线程顺序，使用了MethodImpl   
175<methodimpl(methodimploptions.synchronized)> _   
176Sub CBstream(ByVal s As IAsyncResult)   
177Try   
178Dim t As MyStreamReader = CType(s.AsyncState, MyStreamReader)   
179If t.stream.BaseStream Is Nothing Then   
180Exit Sub   
181End If   
182Dim i As Integer = t.stream.BaseStream.EndRead(s)   
183Dim strReceive As String = System.Text.Encoding.Default.GetString(t.bytes, 0, i)   
184Me.Invoke(New TextAddHandler(AddressOf AppText), New Object() {strReceive})   
185t.stream.BaseStream.BeginRead(t.bytes, 0, 1024, New AsyncCallback(AddressOf CBstream), t)   
186Catch ex As Exception   
187MsgBox("CBstream--" &amp; ex.ToString)   
188End Try   
189End Sub 
190
191Friend Class MyStreamReader   
192Public stream As IO.StreamReader   
193Public bytes(1024) As Byte   
194Public Sub New()   
195End Sub   
196End Class   
197End Class</methodimpl(methodimploptions.synchronized)></system.diagnostics.debuggerstepthrough()>