RectangleF 建構函式

定義

命名空間:

System.Drawing

組件:

System.Drawing.Primitives.dll

使用指定的位置和大小，初始化 RectangleF 類別的新執行個體。

多載

RectangleF(Vector4)	從指定的 Vector4，初始化 結構的新實例RectangleF。
RectangleF(PointF, SizeF)	使用指定的位置和大小，初始化 RectangleF 類別的新執行個體。
RectangleF(Single, Single, Single, Single)	使用指定的位置和大小，初始化 RectangleF 類別的新執行個體。

RectangleF(Vector4)

來源:

RectangleF.cs

從指定的 Vector4，初始化 結構的新實例RectangleF。

public:
 RectangleF(System::Numerics::Vector4 vector);

public RectangleF (System.Numerics.Vector4 vector);

new System.Drawing.RectangleF : System.Numerics.Vector4 -> System.Drawing.RectangleF

Public Sub New (vector As Vector4)

參數

vector

Vector4

來源向量。

RectangleF(PointF, SizeF)

來源:

RectangleF.cs

使用指定的位置和大小，初始化 RectangleF 類別的新執行個體。

public:
 RectangleF(System::Drawing::PointF location, System::Drawing::SizeF size);

public RectangleF (System.Drawing.PointF location, System.Drawing.SizeF size);

new System.Drawing.RectangleF : System.Drawing.PointF * System.Drawing.SizeF -> System.Drawing.RectangleF

Public Sub New (location As PointF, size As SizeF)

參數

location

PointF

PointF，代表矩形區域的左上角。

size

SizeF

SizeF，代表矩形區域的寬度和高度。

範例

下列程式代碼範例示範如何使用 Implicit、 RectangleF和 Equality 成員。 此範例是設計來搭配 Windows Form 使用。 將此程式代碼貼到表單中，並在處理表單的事件Paint時呼叫 ConvertRectangleToRectangleF 方法，並傳遞e為 PaintEventArgs。

private:
   void ConvertRectangleToRectangleF( PaintEventArgs^ e )
   {
      // Create a rectangle.
      Rectangle rectangle1 = Rectangle(30,40,50,100);

      // Convert it to a RectangleF.
      RectangleF convertedRectangle = rectangle1;

      // Create a new RectangleF.
      RectangleF rectangle2 = RectangleF(PointF(30.0F,40.0F),SizeF(50.0F,100.0F));

      // Create a custom, partially transparent brush.
      SolidBrush^ redBrush = gcnew SolidBrush( Color::FromArgb( 40, Color::Red ) );

      // Compare the converted rectangle with the new one.  If they 
      // are equal draw and fill the rectangles on the form.
      if ( convertedRectangle == rectangle2 )
      {
         e->Graphics->FillRectangle( redBrush, rectangle2 );
      }

      // Dispose of the custom brush.
      delete redBrush;
   }
};

private void ConvertRectangleToRectangleF(PaintEventArgs e)
{

    // Create a rectangle.
    Rectangle rectangle1 = new Rectangle(30, 40, 50, 100);

    // Convert it to a RectangleF.
    RectangleF convertedRectangle = rectangle1;

    // Create a new RectangleF.
    RectangleF rectangle2 = new RectangleF(new PointF(30.0F, 40.0F),
        new SizeF(50.0F, 100.0F));

    // Create a custom, partially transparent brush.
    SolidBrush redBrush = new SolidBrush(Color.FromArgb(40, Color.Red));

    // Compare the converted rectangle with the new one.  If they 
    // are equal draw and fill the rectangles on the form.
    if (convertedRectangle == rectangle2)
    {
        e.Graphics.FillRectangle(redBrush, rectangle2);
    }

    // Dispose of the custom brush.
    redBrush.Dispose();
}

Private Sub ConvertRectangleToRectangleF( _
    ByVal e As PaintEventArgs)

    ' Create a rectangle.
    Dim rectangle1 As New Rectangle(30, 40, 50, 100)

    ' Convert it to a RectangleF.
    Dim convertedRectangle As RectangleF = _
        RectangleF.op_Implicit(rectangle1)

    ' Create a new RectangleF.
    Dim rectangle2 As New RectangleF(New PointF(30.0F, 40.0F), _
        New SizeF(50.0F, 100.0F))

    ' Create a custom, partially transparent brush.
    Dim redBrush As New SolidBrush(Color.FromArgb(40, Color.Red))

    ' Compare the converted rectangle with the new one.  If they 
    ' are equal, draw and fill the rectangles on the form.
    If (RectangleF.op_Equality(convertedRectangle, rectangle2)) Then
        e.Graphics.FillRectangle(redBrush, rectangle2)
    End If

    ' Dispose of the custom brush.
    redBrush.Dispose()
End Sub

RectangleF(Single, Single, Single, Single)

來源:

RectangleF.cs

使用指定的位置和大小，初始化 RectangleF 類別的新執行個體。

public:
 RectangleF(float x, float y, float width, float height);

public RectangleF (float x, float y, float width, float height);

new System.Drawing.RectangleF : single * single * single * single -> System.Drawing.RectangleF

Public Sub New (x As Single, y As Single, width As Single, height As Single)

參數

x

Single

矩形左上角的 X 座標。

y

Single

矩形左上角的 Y 座標。

width

Single

矩形的寬度。

height

Single

矩形的高度。

範例

下列程式代碼範例示範如何使用 RectangleF、 Round 和 Truncate 成員。 此範例是設計來搭配 Windows Form 使用。 將此程式代碼貼到表單中，並在處理表單的事件Paint時呼叫 RoundingAndTruncatingRectangles 方法，並傳遞e為 PaintEventArgs。

private:
   void RoundingAndTruncatingRectangles( PaintEventArgs^ e )
   {
      // Construct a new RectangleF.
      RectangleF myRectangleF = RectangleF(30.6F,30.7F,40.8F,100.9F);

      // Call the Round method.
      Rectangle roundedRectangle = Rectangle::Round( myRectangleF );

      // Draw the rounded rectangle in red.
      Pen^ redPen = gcnew Pen( Color::Red,4.0f );
      e->Graphics->DrawRectangle( redPen, roundedRectangle );

      // Call the Truncate method.
      Rectangle truncatedRectangle = Rectangle::Truncate( myRectangleF );

      // Draw the truncated rectangle in white.
      Pen^ whitePen = gcnew Pen( Color::White,4.0f );
      e->Graphics->DrawRectangle( whitePen, truncatedRectangle );

      // Dispose of the custom pens.
      delete redPen;
      delete whitePen;
   }

private void RoundingAndTruncatingRectangles(PaintEventArgs e)
{

    // Construct a new RectangleF.
    RectangleF myRectangleF = 
        new RectangleF(30.6F, 30.7F, 40.8F, 100.9F);

    // Call the Round method.
    Rectangle roundedRectangle = Rectangle.Round(myRectangleF);

    // Draw the rounded rectangle in red.
    Pen redPen = new Pen(Color.Red, 4);
    e.Graphics.DrawRectangle(redPen, roundedRectangle);

    // Call the Truncate method.
    Rectangle truncatedRectangle = Rectangle.Truncate(myRectangleF);

    // Draw the truncated rectangle in white.
    Pen whitePen = new Pen(Color.White, 4);
    e.Graphics.DrawRectangle(whitePen, truncatedRectangle);

    // Dispose of the custom pens.
    redPen.Dispose();
    whitePen.Dispose();
}

Private Sub RoundingAndTruncatingRectangles( _
    ByVal e As PaintEventArgs)

    ' Construct a new RectangleF.
    Dim myRectangleF As New RectangleF(30.6F, 30.7F, 40.8F, 100.9F)

    ' Call the Round method.
    Dim roundedRectangle As Rectangle = Rectangle.Round(myRectangleF)

    ' Draw the rounded rectangle in red.
    Dim redPen As New Pen(Color.Red, 4)
    e.Graphics.DrawRectangle(redPen, roundedRectangle)

    ' Call the Truncate method.
    Dim truncatedRectangle As Rectangle = _
        Rectangle.Truncate(myRectangleF)

    ' Draw the truncated rectangle in white.
    Dim whitePen As New Pen(Color.White, 4)
    e.Graphics.DrawRectangle(whitePen, truncatedRectangle)

    ' Dispose of the custom pens.
    redPen.Dispose()
    whitePen.Dispose()
End Sub