代碼小片斷

Disable X Close Button   

#Region "Disable the 'X'"    
Protected Overrides ReadOnly Property CreateParams() As CreateParams
        Get
            Dim cp As CreateParams = MyBase.CreateParams
            Const CS_NOCLOSE As Integer = &H200
            cp.ClassStyle = cp.ClassStyle Or CS_NOCLOSE
            Return cp
        End Get
    End Property
#End Region

 Disable Alt+F4

[VB.NET]

 Protected Overrides Sub WndProc( _
         ByRef m As System.Windows.Forms.Message)
     Const WM_SYSCOMMAND As Integer = &H112
     Const SC_CLOSE As Integer = &HF060
 
     If m.Msg = WM_SYSCOMMAND And m.WParam.ToInt32() = SC_CLOSE Then
         Return
     End If
 
     MyBase.WndProc(m)
 End Sub

隱藏任務欄 

#Region "隐藏或显示任务栏"

    Private Const SWP_HIDEWINDOW As Integer = &H80
    Private Const SWP_SHOWWINDOW As Integer = &H40
    Private Const SWP_NOSIZE As Integer = &H1
    Private Const SWP_NOMOVE As Integer = &H2
    Private Const SWP_NOACTIVATE As Integer = &H10
    Private Const HWND_TOPMOST As Integer = -1
    Private Const HWND_NOTOPMOST As Integer = -2


    <DllImport("user32.dll")> _
  Private Shared Function SetWindowPos( _
    ByVal hWnd As Integer, _
    ByVal hWndInsertAfter As Integer, _
    ByVal X As Short, _
    ByVal Y As Short, _
    ByVal cx As Short, _
    ByVal cy As Short, _
    ByVal uFlags As UInt32 _
  ) As Boolean
    End Function

    <DllImport("user32.dll")> _
  Private Shared Function FindWindow( _
    ByVal lpClassName As String, _
    ByVal lpWindowName As String _
  ) As Integer
    End Function

    Private Sub ShowOrHideTaskbar(ByVal isShow As Boolean)
        Dim TaskBarHwnd As Integer = FindWindow("Shell_traywnd", "")
        If isShow Then
            SetWindowPos(TaskBarHwnd, 0, 0, 0, 0, 0, Convert.ToUInt32(SWP_SHOWWINDOW))
        Else
            'when browswer open new window,will not active taskbar
            SetWindowPos(TaskBarHwnd, 0, 0, 0, 0, 0, Convert.ToUInt32(SWP_NOACTIVATE))
            'SetWindowPos(TaskBarHwnd, 0, 0, 0, 0, 0, Convert.ToUInt32(SWP_HIDEWINDOW))
        End If
    End Sub

#End Region

得到硬盤邏輯盘的剩余空间

    Public Function GetLogicalDiskFreeSpace(ByVal diskName As String) As Int64 '得到剩余空间
        Dim newDiskName As String = diskName.Substring(0, 1) + ":"

        Dim disk As New ManagementObject("win32_logicaldisk.deviceid=""" + newDiskName + """")
        disk.Get()

        Return Convert.ToInt64(disk("FreeSpace"))
    End Function

讀寫config 文件

    Public Function ReadConfig(ByVal FileName As String, ByVal SectionName As String) As String
        Dim configFile As New XmlDocument

        Dim xpathTemplate = "//configuration/appSettings/add[@key='{0}']"
        Dim xpath As String = String.Format(xpathTemplate, SectionName)

        Dim att As String
        Dim _node As XmlNode

        Try
            With configFile
                .Load(FileName)
                _node = .SelectSingleNode(xpath)
                att = _node.Attributes("value").InnerText
            End With
        Catch fnfe As FileNotFoundException
            Throw fnfe
        Catch xe As XmlException
            Throw xe
        Catch ex As Exception

        End Try

        configFile = Nothing
        Return att

    End Function

    Public Sub WriteConfig(ByVal FileName As String, ByVal SectionName As String, _
    ByVal SectionValue As String)

        Dim configFile As New XmlDocument

        Dim xpathTemplate = "//configuration/appSettings/add[@key='{0}']"
        Dim xpath As String = String.Format(xpathTemplate, SectionName)

        Dim att As String
        Dim _node As XmlNode

        Try
            With configFile
                .Load(FileName)
                _node = .SelectSingleNode(xpath)
                'if no,insert
                If _node Is Nothing Then
                    Dim keyattrib As XmlAttribute = configFile.CreateAttribute("key")
                    keyattrib.InnerText = SectionName

                    Dim valattrib As XmlAttribute = configFile.CreateAttribute("value")
                    valattrib.InnerText = SectionValue
                    Dim add As XmlNode = configFile.CreateElement("add")
                    add.Attributes.Append(keyattrib)
                    add.Attributes.Append(valattrib)
                    Dim appsettings As XmlNode = configFile.GetElementsByTagName("appSettings")(0)
                    appsettings.AppendChild(add)
                Else
                    _node.Attributes("value").InnerText = SectionValue

                End If

                'persist changes
                .Save(FileName)
            End With
        Catch fnfe As FileNotFoundException
            Throw fnfe
        Catch xe As XmlException
            Throw xe
        Catch ex As Exception
            Throw ex
        End Try

        configFile = Nothing

    End Sub

藍牙發送文件

    Public Function BlueTooth(ByVal DeviceAdress As String, ByVal FilePath As String) As String
        Try
            Cursor.Current = Cursors.WaitCursor
            Dim theuri As Uri
            theuri = New Uri("obex://" + DeviceAdress + System.IO.Path.GetFileName(FilePath), True)
            
            Dim request As New ObexWebRequest(theuri)
            'request.Timeout = 1000  '1 seconds
            request.ReadFile(FilePath)
            Dim response As ObexWebResponse = CType(request.GetResponse(), ObexWebResponse)

            Select Case response.StatusCode
                Case ObexStatusCode.BadRequest
                    BlueTooth = "文件发送失败"
                Case ObexStatusCode.Conflict
                    BlueTooth = "发生冲突，请重试"
                Case ObexStatusCode.DatabaseFull
                    BlueTooth = "空间不够，请先清理文件"
                Case ObexStatusCode.NotAcceptable
                    BlueTooth = "发生未知错误"
                Case ObexStatusCode.Forbidden
                    BlueTooth = "发生未知错误"
                Case ObexStatusCode.Final
                    BlueTooth = "文件发送完成"
                Case 160
                    BlueTooth = "文件发送完成"
                Case ObexStatusCode.GatewayTimeout
                    BlueTooth = "文件发送超时"
                Case ObexStatusCode.InternalServerError
                    BlueTooth = "连接中断"
                Case ObexStatusCode.NoContent
                    BlueTooth = "文件内容为空"
                Case ObexStatusCode.NotFound
                    BlueTooth = "找不到文件"
                Case Else
                    BlueTooth = response.StatusCode.ToString
            End Select

            response.Close()
            Cursor.Current = Cursors.Default
        Catch ex As Exception
            BlueTooth = "文件发送失败"
        End Try

 C# 泛型 对象数组排序

        public void Sort<T>(object[] list, string key,bool isReverse)
        {
  
            int len = list.Length;
            Type type = typeof(T);
            object[] keys = new object[len];
            for (int i = 0; i < len; i++)
            {
                //Hack,对于字符形式存储的数字,如7,8,9,10,排序,前面加0
                string temp =type.InvokeMember(key, BindingFlags.GetProperty, null, list[i], null).ToString();
                if (temp.Trim().Length == 1)
                    temp = "0" + temp.ToString();
                keys[i] = temp;
            }
            Array.Sort(keys, list);

            if (isReverse)
                Array.Reverse(list);

        }