RectangleF 构造函数

定义

用指定的位置和大小初始化 RectangleF 类的新实例。

重载

RectangleF(Vector4)

从指定的 Vector4初始化 结构的新实例RectangleF

RectangleF(PointF, SizeF)

用指定的位置和大小初始化 RectangleF 类的新实例。

RectangleF(Single, Single, Single, Single)

用指定的位置和大小初始化 RectangleF 类的新实例。

RectangleF(Vector4)

Source:
RectangleF.cs
Source:
RectangleF.cs
Source:
RectangleF.cs

从指定的 Vector4初始化 结构的新实例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)

参数

vector
Vector4

源向量。

适用于

RectangleF(PointF, SizeF)

Source:
RectangleF.cs
Source:
RectangleF.cs
Source:
RectangleF.cs

用指定的位置和大小初始化 RectangleF 类的新实例。

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)

参数

location
PointF

PointF,它表示矩形区域的左上角。

size
SizeF

SizeF,它表示矩形区域的宽度和高度。

示例

下面的代码示例演示如何使用 ImplicitRectangleFEquality 成员。 此示例旨在与 Windows 窗体一起使用。 将此代码粘贴到窗体中, ConvertRectangleToRectangleF 并在处理窗体 Paint 的事件时调用 方法,作为 ePaintEventArgs传递。

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

适用于

RectangleF(Single, Single, Single, Single)

Source:
RectangleF.cs
Source:
RectangleF.cs
Source:
RectangleF.cs

用指定的位置和大小初始化 RectangleF 类的新实例。

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)

参数

x
Single

矩形左上角的 x 坐标。

y
Single

矩形左上角的 y 坐标。

width
Single

矩形的宽度。

height
Single

矩形的高度。

示例

下面的代码示例演示如何使用 RectangleFRoundTruncate 成员。 此示例旨在与 Windows 窗体一起使用。 将此代码粘贴到窗体中, RoundingAndTruncatingRectangles 并在处理窗体 Paint 的事件时调用 方法,作为 ePaintEventArgs传递。

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

适用于