HOW TO：使用 ToolStripControlHost 為 Windows Form 控制項換行

ToolStripControlHost 的設計目的是利用 ToolStripControlHost 建構函式或者藉由擴充 ToolStripControlHost 本身，來啟用任意 Windows Form 控制項裝載。 擴充 ToolStripControlHost 並且實作那些控制項屬性和方法所公開常用的屬性和方法，是較簡單的包裝控制項方法。 也可以在 ToolStripControlHost 層級上公開控制項的事件。

若要藉由衍生在 ToolStripControlHost 中裝載控制項

1. 擴充 ToolStripControlHost。 實作預設的建構函式，此建構函式會呼叫傳遞所需控制項中的基底類別建構函式。

   ' Call the base constructor passing in a MonthCalendar instance.
   Public Sub New() 
       MyBase.New(New MonthCalendar())
   
   End Sub
   

           // Call the base constructor passing in a MonthCalendar instance.
           public ToolStripMonthCalendar() : base (new MonthCalendar()) { }
   

   // Call the base constructor passing in a MonthCalendar instance.
   ToolStripMonthCalendar() : ToolStripControlHost( gcnew MonthCalendar ) {}
   

2. 宣告同一型別的屬性為包裝控制項 (Wrapped Control)，並且傳回 Control 當做屬性存取子中的正確型別控制項。

   Public ReadOnly Property MonthCalendarControl() As MonthCalendar 
       Get
           Return CType(Control, MonthCalendar)
       End Get
   End Property
   

           public MonthCalendar MonthCalendarControl
           {
               get
               {
                   return Control as MonthCalendar;
               }
           }
   

   property MonthCalendar^ MonthCalendarControl 
   {
      MonthCalendar^ get()
      {
         return static_cast<MonthCalendar^>(Control);
      }
   }
   

3. 使用擴充類別 (Extended Class) 上的屬性和方法來公開包裝控制項經常使用的其他屬性和方法。

   ' Expose the MonthCalendar.FirstDayOfWeek as a property.
   Public Property FirstDayOfWeek() As Day 
       Get
           Return MonthCalendarControl.FirstDayOfWeek
       End Get
       Set
           MonthCalendarControl.FirstDayOfWeek = value
       End Set
   End Property
   
   ' Expose the AddBoldedDate method.
   Public Sub AddBoldedDate(ByVal dateToBold As DateTime) 
       MonthCalendarControl.AddBoldedDate(dateToBold)
   
   End Sub
   

           // Expose the MonthCalendar.FirstDayOfWeek as a property.
           public Day FirstDayOfWeek
           {
               get
               {
                   return MonthCalendarControl.FirstDayOfWeek;
               }
               set { MonthCalendarControl.FirstDayOfWeek = value; }
           }
   
           // Expose the AddBoldedDate method.
           public void AddBoldedDate(DateTime dateToBold)
           {
               MonthCalendarControl.AddBoldedDate(dateToBold);
           }
   

   property Day FirstDayOfWeek 
   {
      // Expose the MonthCalendar.FirstDayOfWeek as a property.
      Day get()
      {
         return MonthCalendarControl->FirstDayOfWeek;
      }
   
      void set( Day value )
      {
         MonthCalendarControl->FirstDayOfWeek = value;
      }
   }
   
   // Expose the AddBoldedDate method.
   void AddBoldedDate( DateTime dateToBold )
   {
      MonthCalendarControl->AddBoldedDate( dateToBold );
   }
   

4. 請選擇性覆寫 OnSubscribeControlEvents 和 OnUnsubscribeControlEvents 方法並加入要公開的控制項事件。

   Protected Overrides Sub OnSubscribeControlEvents(ByVal c As Control) 
   
       ' Call the base so the base events are connected.
       MyBase.OnSubscribeControlEvents(c)
   
       ' Cast the control to a MonthCalendar control.
       Dim monthCalendarControl As MonthCalendar = _
           CType(c, MonthCalendar)
   
       ' Add the event.
       AddHandler monthCalendarControl.DateChanged, _
           AddressOf HandleDateChanged
   
   End Sub
   
   Protected Overrides Sub OnUnsubscribeControlEvents(ByVal c As Control)
       ' Call the base method so the basic events are unsubscribed.
       MyBase.OnUnsubscribeControlEvents(c)
   
       ' Cast the control to a MonthCalendar control.
       Dim monthCalendarControl As MonthCalendar = _
           CType(c, MonthCalendar)
   
       ' Remove the event.
       RemoveHandler monthCalendarControl.DateChanged, _
           AddressOf HandleDateChanged
   
   End Sub
   

           protected override void OnSubscribeControlEvents(Control c)
           {
               // Call the base so the base events are connected.
               base.OnSubscribeControlEvents(c);
   
               // Cast the control to a MonthCalendar control.
               MonthCalendar monthCalendarControl = (MonthCalendar) c;
   
               // Add the event.
               monthCalendarControl.DateChanged +=
                   new DateRangeEventHandler(OnDateChanged);
           }
   
           protected override void OnUnsubscribeControlEvents(Control c)
           {
               // Call the base method so the basic events are unsubscribed.
               base.OnUnsubscribeControlEvents(c);
   
               // Cast the control to a MonthCalendar control.
               MonthCalendar monthCalendarControl = (MonthCalendar) c;
   
               // Remove the event.
               monthCalendarControl.DateChanged -=
                   new DateRangeEventHandler(OnDateChanged);
           }
   

   void OnSubscribeControlEvents( System::Windows::Forms::Control^ c )
   {
      // Call the base so the base events are connected.
      __super::OnSubscribeControlEvents( c );
   
      // Cast the control to a MonthCalendar control.
      MonthCalendar^ monthCalendarControl = (MonthCalendar^)c;
   
      // Add the event.
      monthCalendarControl->DateChanged += gcnew DateRangeEventHandler( this, &ToolStripMonthCalendar::HandleDateChanged );
   }
   
   void OnUnsubscribeControlEvents( System::Windows::Forms::Control^ c )
   {
   
      // Call the base method so the basic events are unsubscribed.
      __super::OnUnsubscribeControlEvents( c );
   
      // Cast the control to a MonthCalendar control.
      MonthCalendar^ monthCalendarControl = (MonthCalendar^)c;
   
      // Remove the event.
      monthCalendarControl->DateChanged -= gcnew DateRangeEventHandler( this, &ToolStripMonthCalendar::HandleDateChanged );
   }
   

5. 請為要公開的事件提供必要的包裝。

       ' Declare the DateChanged event.
       Public Event DateChanged As DateRangeEventHandler
   
       ' Raise the DateChanged event.
       Private Sub HandleDateChanged(ByVal sender As Object, _
           ByVal e As DateRangeEventArgs)
   
           RaiseEvent DateChanged(Me, e)
       End Sub
   End Class
   

           // Declare the DateChanged event.
           public event DateRangeEventHandler DateChanged;
   
           // Raise the DateChanged event.
           private void OnDateChanged(object sender, DateRangeEventArgs e)
           {
               if (DateChanged != null)
               {
                   DateChanged(this, e);
               }
           }
   

   // Declare the DateChanged event.
   // Raise the DateChanged event.
   void HandleDateChanged( Object^ sender, DateRangeEventArgs^ e )
   {
      if ( DateChanged != nullptr )
      {
         DateChanged( this, e );
      }
   }
   

範例

'Declare a class that inherits from ToolStripControlHost.

Public Class ToolStripMonthCalendar
    Inherits ToolStripControlHost

    ' Call the base constructor passing in a MonthCalendar instance.
    Public Sub New() 
        MyBase.New(New MonthCalendar())

    End Sub

    Public ReadOnly Property MonthCalendarControl() As MonthCalendar 
        Get
            Return CType(Control, MonthCalendar)
        End Get
    End Property

    ' Expose the MonthCalendar.FirstDayOfWeek as a property.
    Public Property FirstDayOfWeek() As Day 
        Get
            Return MonthCalendarControl.FirstDayOfWeek
        End Get
        Set
            MonthCalendarControl.FirstDayOfWeek = value
        End Set
    End Property

    ' Expose the AddBoldedDate method.
    Public Sub AddBoldedDate(ByVal dateToBold As DateTime) 
        MonthCalendarControl.AddBoldedDate(dateToBold)

    End Sub

    ' Subscribe and unsubscribe the control events you wish to expose.
    Protected Overrides Sub OnSubscribeControlEvents(ByVal c As Control) 

        ' Call the base so the base events are connected.
        MyBase.OnSubscribeControlEvents(c)

        ' Cast the control to a MonthCalendar control.
        Dim monthCalendarControl As MonthCalendar = _
            CType(c, MonthCalendar)

        ' Add the event.
        AddHandler monthCalendarControl.DateChanged, _
            AddressOf HandleDateChanged

    End Sub

    Protected Overrides Sub OnUnsubscribeControlEvents(ByVal c As Control)
        ' Call the base method so the basic events are unsubscribed.
        MyBase.OnUnsubscribeControlEvents(c)

        ' Cast the control to a MonthCalendar control.
        Dim monthCalendarControl As MonthCalendar = _
            CType(c, MonthCalendar)

        ' Remove the event.
        RemoveHandler monthCalendarControl.DateChanged, _
            AddressOf HandleDateChanged

    End Sub

    ' Declare the DateChanged event.
    Public Event DateChanged As DateRangeEventHandler

    ' Raise the DateChanged event.
    Private Sub HandleDateChanged(ByVal sender As Object, _
        ByVal e As DateRangeEventArgs)

        RaiseEvent DateChanged(Me, e)
    End Sub
End Class

    //Declare a class that inherits from ToolStripControlHost.
    public class ToolStripMonthCalendar : ToolStripControlHost
    {
        // Call the base constructor passing in a MonthCalendar instance.
        public ToolStripMonthCalendar() : base (new MonthCalendar()) { }

        public MonthCalendar MonthCalendarControl
        {
            get
            {
                return Control as MonthCalendar;
            }
        }

        // Expose the MonthCalendar.FirstDayOfWeek as a property.
        public Day FirstDayOfWeek
        {
            get
            {
                return MonthCalendarControl.FirstDayOfWeek;
            }
            set { MonthCalendarControl.FirstDayOfWeek = value; }
        }

        // Expose the AddBoldedDate method.
        public void AddBoldedDate(DateTime dateToBold)
        {
            MonthCalendarControl.AddBoldedDate(dateToBold);
        }

        // Subscribe and unsubscribe the control events you wish to expose.
        protected override void OnSubscribeControlEvents(Control c)
        {
            // Call the base so the base events are connected.
            base.OnSubscribeControlEvents(c);

            // Cast the control to a MonthCalendar control.
            MonthCalendar monthCalendarControl = (MonthCalendar) c;

            // Add the event.
            monthCalendarControl.DateChanged +=
                new DateRangeEventHandler(OnDateChanged);
        }

        protected override void OnUnsubscribeControlEvents(Control c)
        {
            // Call the base method so the basic events are unsubscribed.
            base.OnUnsubscribeControlEvents(c);

            // Cast the control to a MonthCalendar control.
            MonthCalendar monthCalendarControl = (MonthCalendar) c;

            // Remove the event.
            monthCalendarControl.DateChanged -=
                new DateRangeEventHandler(OnDateChanged);
        }

        // Declare the DateChanged event.
        public event DateRangeEventHandler DateChanged;

        // Raise the DateChanged event.
        private void OnDateChanged(object sender, DateRangeEventArgs e)
        {
            if (DateChanged != null)
            {
                DateChanged(this, e);
            }
        }
    }

//Declare a class that inherits from ToolStripControlHost.
public ref class ToolStripMonthCalendar: public ToolStripControlHost
{
public:
   // Call the base constructor passing in a MonthCalendar instance.
   ToolStripMonthCalendar() : ToolStripControlHost( gcnew MonthCalendar ) {}

   property MonthCalendar^ MonthCalendarControl 
   {
      MonthCalendar^ get()
      {
         return static_cast<MonthCalendar^>(Control);
      }
   }
   property Day FirstDayOfWeek 
   {
      // Expose the MonthCalendar.FirstDayOfWeek as a property.
      Day get()
      {
         return MonthCalendarControl->FirstDayOfWeek;
      }

      void set( Day value )
      {
         MonthCalendarControl->FirstDayOfWeek = value;
      }
   }

   // Expose the AddBoldedDate method.
   void AddBoldedDate( DateTime dateToBold )
   {
      MonthCalendarControl->AddBoldedDate( dateToBold );
   }

protected:
   // Subscribe and unsubscribe the control events you wish to expose.
   void OnSubscribeControlEvents( System::Windows::Forms::Control^ c )
   {
      // Call the base so the base events are connected.
      __super::OnSubscribeControlEvents( c );

      // Cast the control to a MonthCalendar control.
      MonthCalendar^ monthCalendarControl = (MonthCalendar^)c;

      // Add the event.
      monthCalendarControl->DateChanged += gcnew DateRangeEventHandler( this, &ToolStripMonthCalendar::HandleDateChanged );
   }

   void OnUnsubscribeControlEvents( System::Windows::Forms::Control^ c )
   {

      // Call the base method so the basic events are unsubscribed.
      __super::OnUnsubscribeControlEvents( c );

      // Cast the control to a MonthCalendar control.
      MonthCalendar^ monthCalendarControl = (MonthCalendar^)c;

      // Remove the event.
      monthCalendarControl->DateChanged -= gcnew DateRangeEventHandler( this, &ToolStripMonthCalendar::HandleDateChanged );
   }

public:
   event DateRangeEventHandler^ DateChanged;

private:
   // Declare the DateChanged event.
   // Raise the DateChanged event.
   void HandleDateChanged( Object^ sender, DateRangeEventArgs^ e )
   {
      if ( DateChanged != nullptr )
      {
         DateChanged( this, e );
      }
   }
};

編譯程式碼

• 這個範例需要：

• System 和 System.Windows.Forms 組件的參考。

如需從 Visual Basic 或 Visual C# 的命令列建置這個範例的詳細資訊，請參閱從命令列建置 (Visual Basic) 或使用 csc.exe 建置命令列。 您也可以透過將程式碼貼入新的專案，在 Visual Studio 中建置此範例。 如需詳細資訊，請參閱HOW TO：使用 Visual Studio 編譯及執行完整的 Windows Form 程式碼範例 和 HOW TO：使用 Visual Studio 編譯及執行完整的 Windows Form 程式碼範例 和 HOW TO：使用 Visual Studio 編譯及執行完整的 Windows Form 程式碼範例 和 HOW TO：使用 Visual Studio 編譯及執行完整的 Windows Form 程式碼範例 和 如何：使用 Visual Studio 編譯及執行完整的 Windows Form 程式碼範例.

請參閱

參考

ToolStripControlHost

ToolStrip 控制項概觀 (Windows Form)

概念

ToolStrip 控制項架構

ToolStrip 技術摘要