通过

RectangleF 构造函数

  • 参考

定义

命名空间:
System.Drawing
程序集:
System.Drawing.Primitives.dll
程序集:
System.Drawing.dll
程序集:
netstandard.dll

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 Implicit、 RectangleF和 Equality 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 RectangleF、 Round 和 Truncate 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