充分利用 .NET 架構的 PropertyGrid 控制項(微軟)之三

控制項|微軟 何處使用 PropertyGrid 控制項
在應用程式中的很多地方，您都可以使使用者與 PropertyGrid 進行互動，從而獲得更豐富的編輯體驗。例如，某個應用程式套件組合含多個使用者可以設定的“設定”或選項，其中一些可能十分複雜。您可以使用選項按鈕、組合框或文字框來表示這些選項。但本文將逐步介紹如何使用 PropertyGrid 控制項建立選項視窗來設定應用程式選項。上面所建立的 OptionsDialog 表單即是選項視窗的開始。現在，我們建立一個名為 AppSettings 的類，其中包含映射到應用程式設定的所有屬性。如果建立單獨的類而不使用多個分散的變數，設定將更便於管理和維護。

' Visual Basic

Public Class AppSettings
    Private _saveOnClose As Boolean = True
    Private _greetingText As String = "歡迎使用應用程式！"
    Private _maxRepeatRate As Integer = 10
    Private _itemsInMRU As Integer = 4

    Private _settingsChanged As Boolean = False
    Private _appVersion As String = "1.0"

    Public Property SaveOnClose() As Boolean
        Get
            Return _saveOnClose
        End Get
        Set(ByVal Value As Boolean)
            SaveOnClose = Value
        End Set
    End Property

    Public Property GreetingText() As String
        Get
            Return _greetingText
        End Get
        Set(ByVal Value As String)
            _greetingText = Value
        End Set
    End Property

    Public Property ItemsInMRUList() As Integer
        Get
            Return _itemsInMRU
        End Get
        Set(ByVal Value As Integer)
            _itemsInMRU = Value
        End Set
    End Property

    Public Property MaxRepeatRate() As Integer
        Get
            Return _maxRepeatRate
        End Get
        Set(ByVal Value As Integer)
            _maxRepeatRate = Value
        End Set
    End Property

    Public Property SettingsChanged() As Boolean
        Get
            Return _settingsChanged
        End Get
        Set(ByVal Value As Boolean)
            _settingsChanged = Value
        End Set
    End Property

    Public Property AppVersion() As String
        Get
            Return _appVersion
        End Get
        Set(ByVal Value As String)
            _appVersion = Value
        End Set
    End Property
End Class