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在很多Windows應(yīng)用程序上我們都會用到類似Windows自帶的IP地址輸入框，如下圖所示： 在.NET中，有很多開發(fā)人員的做法是通過用普通的文本框加正則表達(dá)式的方式來實現(xiàn)這一功能或者干脆就使用文本框，但是其在方便性和實用性上很難跟MS系統(tǒng)自己的IP地址框相比。本文章實現(xiàn)的就是一個從Windows中“借”來個一個文本輸入框，代碼如下：
 Imports System.Runtime.InteropServices  Namespace FormsNamespace Forms  Public Class IPTextBoxClass IPTextBox Inherits System.Windows.Forms.Control 組件設(shè)計器生成的代碼#Region " 組件設(shè)計器生成的代碼 " Public Sub New()Sub New() MyBase.New() ‘ 該調(diào)用是組件設(shè)計器所必需的。 InitializeComponent() ‘在 InitializeComponent() 調(diào)用之后添加任何初始化 Dim CommCtrl As User32.Structures.InitCommonControls CommCtrl.dwSize = 8 CommCtrl.dwICC = User32.Constants.ICC_INTERNET_CLASSES If User32.InitCommonControlsEx(CommCtrl) Then CtlHwnd = User32.CreateWindowEx(0, "SysIPAddress32", "", _ User32.Constants.WS_CHILD Or User32.Constants.WS_TABSTOP Or User32.Constants.WS_VISIBLE, 0, 0, 132, 21, _ Me.Handle, IntPtr.Zero, GetInstance, IntPtr.Zero) If CtlHwnd.Equals(IntPtr.Zero) = False Then ‘將IP控件的字體設(shè)置的根窗體一樣 用宋體 Dim hFont As IntPtr = Me.Font.ToHfont() User32.SendMessage(CtlHwnd, User32.WindowsMessages.WM_SETFONT, hFont, IntPtr.Zero) End If Else End If End Sub ‘Control 重寫 dispose 以清理組件列表。 Protected Overloads Overrides Sub Dispose()Sub Dispose(ByVal disposing As Boolean) If CtlHwnd.Equals(IntPtr.Zero) = False Then User32.DestroyWindow(CtlHwnd) If disposing Then If Not (components Is Nothing) Then components.Dispose() End If End If MyBase.Dispose(disposing) End Sub ‘控件設(shè)計器所必需的 Private components As System.ComponentModel.IContainer ‘注意: 以下過程是組件設(shè)計器所必需的 ‘ 可以使用組件設(shè)計器修改此過程。不要使用 ‘ 代碼編輯器修改它。 <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()Sub InitializeComponent() components = New System.ComponentModel.Container End Sub#End Region Protected Overrides Sub OnPaint()Sub OnPaint(ByVal pe As System.Windows.Forms.PaintEventArgs) MyBase.OnPaint(pe) ‘在此添加自定義繪畫代碼 End Sub Private Sub IPTextBox_SizeChanged()Sub IPTextBox_SizeChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.SizeChanged If CtlHwnd.Equals(IntPtr.Zero) = False Then User32.SetWindowPos(CtlHwnd, 0, 0, 0, Me.Width, Me.Height, &H22) End Sub Private CtlHwnd As IntPtrPropertys#Region " Propertys " Public Overrides Property Text()Property Text() As String Get Dim TempLng As Integer = 0 Dim tmpLng As IntPtr = System.Runtime.InteropServices.Marshal.AllocHGlobal(4) Try User32.SendMessage(CtlHwnd, User32.Constants.IPM_GETADDRESS, IntPtr.Zero, tmpLng) TempLng = System.Runtime.InteropServices.Marshal.ReadInt32(tmpLng) Catch ex As Exception MsgBox(ex.Message) End Try System.Runtime.InteropServices.Marshal.FreeHGlobal(tmpLng) Return FIRST_IPADDRESS(TempLng) & "." & SECOND_IPADDRESS(TempLng) & "." & THIRD_IPADDRESS(TempLng) & "." & FOURTH_IPADDRESS(TempLng) End Get Set(ByVal Value As String) If Value = String.Empty Then Value = "" If Value.Split(".").Length <> 4 Then Value = "" If Value <> "" Then User32.SendMessage(CtlHwnd, User32.Constants.IPM_SETADDRESS, IntPtr.Zero, New IntPtr(MakeIPAddess(Value))) End Set End Property#End RegionFunctions#Region " Functions " ‘‘‘ <summary> ‘‘‘ 獲取應(yīng)用程序的進(jìn)程句柄 ‘‘‘ </summary> ‘‘‘ <returns></returns> ‘‘‘ <remarks></remarks> Private Function GetInstance()Function GetInstance() As IntPtr Dim tmpType As Type = Me.GetType Dim tmpModule As System.Reflection.Module = tmpType.Module Return System.Runtime.InteropServices.Marshal.GetHINSTANCE(tmpModule) End Function Private Function FIRST_IPADDRESS()Function FIRST_IPADDRESS(ByVal x As Int32) As Byte FIRST_IPADDRESS = ((x And &H7F000000) &H1000000) Or (((x And &H80000000) <> 0) And &H80) End Function Private Function SECOND_IPADDRESS()Function SECOND_IPADDRESS(ByVal x As Int32) As Byte SECOND_IPADDRESS = (x And &HFF0000) &H10000 End Function Private Function THIRD_IPADDRESS()Function THIRD_IPADDRESS(ByVal x As Int32) As Byte THIRD_IPADDRESS = (x And &HFF00&) &H100 End Function Public Function FOURTH_IPADDRESS()Function FOURTH_IPADDRESS(ByVal x As Int32) As Byte FOURTH_IPADDRESS = x And &HFF End Function Private Function MAKEIPRANGE()Function MAKEIPRANGE(ByVal low As Byte, ByVal high As Byte) As Int32 MAKEIPRANGE = high * &H100& Or low End Function Private Function MakeIPAddess()Function MakeIPAddess(ByVal b1 As Byte, ByVal b2 As Byte, ByVal b3 As Byte, ByVal b4 As Byte) As Int32 Return ((b1 And &H7F) * &H1000000 Or (b1 And &H80) <> 0 And &H80000000) Or (b2 * &H10000) Or (b3 * &H100&) Or (b4) End Function Private Function MakeIPAddess()Function MakeIPAddess(ByVal IPAddress As String) As Int32 Dim ips As String() = IPAddress.Split(".") If ips.Length <> 4 Then ips = New String() {"0", "0", "0", "0"} Dim cout As Int32 = 0 For i As Integer = 0 To 3 If Not IsNumeric(ips(i)) Then Throw New Exception("IP地址錯誤！") End If cout = (cout << 8) Or (Val(ips(i)) And &HFF) Next Return cout End Function#End Region End Class Public Class User32Class User32 <DllImport("user32", EntryPoint:="CreateWindowExA", CharSet:=CharSet.Ansi, SetLastError:=True, ExactSpelling:=True)> _ Public Shared Function CreateWindowEx()Function CreateWindowEx(ByVal dwExStyle As Integer, <MarshalAs(UnmanagedType.VBByRefStr)> ByRef lpClassName As String, <MarshalAs(UnmanagedType.VBByRefStr)> ByRef lpWindowName As String, ByVal dwStyle As Integer, ByVal x As Integer, ByVal y As Integer, ByVal nWidth As Integer, ByVal nHeight As Integer, ByVal hWndParent As IntPtr, ByVal hMenu As IntPtr, ByVal hInstance As IntPtr, ByVal lpParam As IntPtr) As IntPtr End Function <DllImport("user32", CharSet:=CharSet.Ansi, SetLastError:=True, ExactSpelling:=True)> _ Public Shared Function DestroyWindow()Function DestroyWindow(ByVal hwnd As IntPtr) As Integer End Function <DllImport("user32", EntryPoint:="SendMessageA", CharSet:=CharSet.Ansi, SetLastError:=True, ExactSpelling:=True)> _ Public Shared Function SendMessage()Function SendMessage(ByVal hwnd As Integer, ByVal wMsg As Integer, ByVal wParam As Integer, ByVal lParam As Integer) As Integer End Function <DllImport("user32", EntryPoint:="SendMessageA", CharSet:=CharSet.Ansi, SetLastError:=True, ExactSpelling:=True)> _ Public Shared Function SendMessage()Function SendMessage(ByVal hwnd As IntPtr, ByVal wMsg As Integer, ByVal wParam As IntPtr, ByVal lParam As IntPtr) As IntPtr End Function <DllImport("user32", CharSet:=CharSet.Ansi, SetLastError:=True, ExactSpelling:=True)> _ Public Shared Function SetWindowPos()Function SetWindowPos(ByVal hwnd As IntPtr, ByVal hWndInsertAfter As Integer, ByVal x As Integer, ByVal y As Integer, ByVal cx As Integer, ByVal cy As Integer, ByVal wFlags As Integer) As Integer End Function <DllImport("comctl32.dll", CharSet:=CharSet.Ansi, SetLastError:=True, ExactSpelling:=True)> _ Public Shared Function InitCommonControlsEx()Function InitCommonControlsEx(ByRef TLPINITCOMMONCONTROLSEX As Structures.InitCommonControls) As Integer End Function ‘ Fields Public Const MENU_CLASS As String = "#32768" ‘ Nested Types Public Enum ConstantsEnum Constants ICC_INTERNET_CLASSES = 2048 IPM_CLEARADDRESS = 1124 IPM_GETADDRESS = 1126 IPM_SETADDRESS = 1125 WS_CHILD = 1073741824 WS_TABSTOP = 65536 WS_VISIBLE = 268435456 End Enum Public Class StructuresClass Structures <StructLayout(LayoutKind.Sequential)> _ Public Structure InitCommonControlsStructure InitCommonControls ‘ Fields Public dwICC As Integer Public dwSize As Integer End Structure <StructLayout(LayoutKind.Sequential)> _ Public Structure WINDOWPOSStructure WINDOWPOS ‘ Fields Public cx As Integer Public cy As Integer Public flags As Integer Public hWnd As IntPtr Public hWndInsertAfter As IntPtr Public x As Integer Public y As Integer End Structure End Class Public Enum WindowsMessagesEnum WindowsMessages WM_SETFONT = 48 End Enum End Class End Namespace |
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IP地址輸入框
