Region.Exclude 方法

定義

命名空間:

System.Drawing

組件:

System.Drawing.Common.dll

套件:

System.Drawing.Common v9.0.0-preview.6.24327.6

將此 Region 更新為其內部部分，但未與指定的 Rectangle 結構交集。

多載

Exclude(Region)	更新此 Region，只包含其內部部分，但未與指定的 Region相交。
Exclude(GraphicsPath)	更新此 Region，只包含其內部部分，但未與指定的 GraphicsPath相交。
Exclude(Rectangle)	更新此 Region，只包含其內部與指定之 Rectangle 結構不相交的部分。
Exclude(RectangleF)	更新此 Region，只包含其內部與指定之 RectangleF 結構不相交的部分。

Exclude(Region)

來源:

Region.cs

更新此 Region，只包含其內部部分，但未與指定的 Region相交。

public:
 void Exclude(System::Drawing::Region ^ region);

public void Exclude (System.Drawing.Region region);

member this.Exclude : System.Drawing.Region -> unit

Public Sub Exclude (region As Region)

參數

region

Region

要從這個 Region排除的 Region。

例外狀況

ArgumentNullException

region null。

範例

如需程式代碼範例，請參閱 Exclude(RectangleF) 和 Complement(Region) 方法。

Exclude(GraphicsPath)

來源:

Region.cs

更新此 Region，只包含其內部部分，但未與指定的 GraphicsPath相交。

public:
 void Exclude(System::Drawing::Drawing2D::GraphicsPath ^ path);

public void Exclude (System.Drawing.Drawing2D.GraphicsPath path);

member this.Exclude : System.Drawing.Drawing2D.GraphicsPath -> unit

Public Sub Exclude (path As GraphicsPath)

參數

path

GraphicsPath

要從這個 Region排除的 GraphicsPath。

例外狀況

ArgumentNullException

path null。

範例

下列程式代碼範例示範 Region 建構函式和 Exclude 和 Dispose 方法。

此範例的設計目的是要與 Windows Forms 搭配使用。 將程式代碼貼到表單中，並在處理表單的 Paint 事件時呼叫 FillRegionExcludingPath 方法，並將 e 傳遞為 PaintEventArgs。

private:
   void FillRegionExcludingPath( PaintEventArgs^ e )
   {
      // Create the region using a rectangle.
      System::Drawing::Region^ myRegion = gcnew System::Drawing::Region( Rectangle(20,20,100,100) );

      // Create the GraphicsPath.
      System::Drawing::Drawing2D::GraphicsPath^ path = gcnew System::Drawing::Drawing2D::GraphicsPath;

      // Add a circle to the graphics path.
      path->AddEllipse( 50, 50, 25, 25 );

      // Exclude the circle from the region.
      myRegion->Exclude( path );

      // Retrieve a Graphics object from the form.
      Graphics^ formGraphics = e->Graphics;

      // Fill the region in blue.
      formGraphics->FillRegion( Brushes::Blue, myRegion );

      // Dispose of the path and region objects.
      delete path;
      delete myRegion;
   }

private void FillRegionExcludingPath(PaintEventArgs e)
{

    // Create the region using a rectangle.
    Region myRegion = new Region(new Rectangle(20, 20, 100, 100));

    // Create the GraphicsPath.
    System.Drawing.Drawing2D.GraphicsPath path = 
        new System.Drawing.Drawing2D.GraphicsPath();

    // Add a circle to the graphics path.
    path.AddEllipse(50, 50, 25, 25);

    // Exclude the circle from the region.
    myRegion.Exclude(path);

    // Retrieve a Graphics object from the form.
    Graphics formGraphics = e.Graphics;

    // Fill the region in blue.
    formGraphics.FillRegion(Brushes.Blue, myRegion);

    // Dispose of the path and region objects.
    path.Dispose();
    myRegion.Dispose();
}

Private Sub FillRegionExcludingPath(ByVal e As PaintEventArgs)

    ' Create the region using a rectangle.
    Dim myRegion As New Region(New Rectangle(20, 20, 100, 100))

    ' Create the GraphicsPath.
    Dim path As New System.Drawing.Drawing2D.GraphicsPath

    ' Add a circle to the graphics path.
    path.AddEllipse(50, 50, 25, 25)

    ' Exclude the circle from the region.
    myRegion.Exclude(path)

    ' Retrieve a Graphics object from the form.
    Dim formGraphics As Graphics = e.Graphics

    ' Fill the region in blue.
    formGraphics.FillRegion(Brushes.Blue, myRegion)

    ' Dispose of the path and region objects.
    path.Dispose()
    myRegion.Dispose()

End Sub

Exclude(Rectangle)

來源:

Region.cs

更新此 Region，只包含其內部與指定之 Rectangle 結構不相交的部分。

public:
 void Exclude(System::Drawing::Rectangle rect);

public void Exclude (System.Drawing.Rectangle rect);

member this.Exclude : System.Drawing.Rectangle -> unit

Public Sub Exclude (rect As Rectangle)

參數

rect

Rectangle

要從這個 Region中排除的 Rectangle 結構。

範例

如需程式代碼範例，請參閱 Exclude(RectangleF) 方法。

Exclude(RectangleF)

來源:

Region.cs

更新此 Region，只包含其內部與指定之 RectangleF 結構不相交的部分。

public:
 void Exclude(System::Drawing::RectangleF rect);

public void Exclude (System.Drawing.RectangleF rect);

member this.Exclude : System.Drawing.RectangleF -> unit

Public Sub Exclude (rect As RectangleF)

參數

rect

RectangleF

要從這個 Region中排除的 RectangleF 結構。

範例

下列範例的設計目的是要與 Windows Forms 搭配使用，而且需要 PaintEventArgse，這是 Paint 事件處理程式的參數。 程式代碼會執行下列動作：

• 建立矩形，並將它繪製到黑色的畫面

• 建立第二個矩形，與第一個矩形交集，並以紅色繪製到畫面。

• 使用第一個矩形建立區域。

• 當與第二個矩形結合時，取得區域的非排除區域。

• 以藍色填滿非隔離區域，並將它繪製到螢幕。

請注意，未與矩形交集的區域區域會以藍色表示。

public:
   void Exclude_RectF_Example( PaintEventArgs^ e )
   {
      // Create the first rectangle and draw it to the screen in black.
      Rectangle regionRect = Rectangle(20,20,100,100);
      e->Graphics->DrawRectangle( Pens::Black, regionRect );

      // Create the second rectangle and draw it to the screen in red.
      RectangleF complementRect = RectangleF(90,30,100,100);
      e->Graphics->DrawRectangle( Pens::Red, Rectangle::Round( complementRect ) );

      // Create a region using the first rectangle.
      System::Drawing::Region^ myRegion = gcnew System::Drawing::Region( regionRect );

      // Get the nonexcluded area of myRegion when combined with
      // complementRect.
      myRegion->Exclude( complementRect );
      
      // Fill the nonexcluded area of myRegion with blue.
      SolidBrush^ myBrush = gcnew SolidBrush( Color::Blue );
      e->Graphics->FillRegion( myBrush, myRegion );
   }

public void Exclude_RectF_Example(PaintEventArgs e)
{
             
    // Create the first rectangle and draw it to the screen in black.
    Rectangle regionRect = new Rectangle(20, 20, 100, 100);
    e.Graphics.DrawRectangle(Pens.Black, regionRect);
             
    // Create the second rectangle and draw it to the screen in red.
    RectangleF complementRect = new RectangleF(90, 30, 100, 100);
    e.Graphics.DrawRectangle(Pens.Red,
        Rectangle.Round(complementRect));
             
    // Create a region using the first rectangle.
    Region myRegion = new Region(regionRect);
             
    // Get the nonexcluded area of myRegion when combined with
             
    // complementRect.
    myRegion.Exclude(complementRect);
             
    // Fill the nonexcluded area of myRegion with blue.
    SolidBrush myBrush = new SolidBrush(Color.Blue);
    e.Graphics.FillRegion(myBrush, myRegion);
}

Public Sub Exclude_RectF_Example(ByVal e As PaintEventArgs)

    ' Create the first rectangle and draw it to the screen in black.
    Dim regionRect As New Rectangle(20, 20, 100, 100)
    e.Graphics.DrawRectangle(Pens.Black, regionRect)

    ' create the second rectangle and draw it to the screen in red.
    Dim complementRect As New RectangleF(90, 30, 100, 100)
    e.Graphics.DrawRectangle(Pens.Red, _
    Rectangle.Round(complementRect))

    ' Create a region using the first rectangle.
    Dim myRegion As New [Region](regionRect)

    ' Get the nonexcluded area of myRegion when combined with
    ' complementRect.
    myRegion.Exclude(complementRect)

    ' Fill the nonexcluded area of myRegion with blue.
    Dim myBrush As New SolidBrush(Color.Blue)
    e.Graphics.FillRegion(myBrush, myRegion)
End Sub