SizeF.op_Addition 方法

将一个 SizeF 结构的宽度和高度与另一个 SizeF 结构的宽度和高度相加。

**命名空间:**System.Drawing
**程序集:**System.Drawing（在 system.drawing.dll 中）

语法

声明
Public Shared Operator + ( _
    sz1 As SizeF, _
    sz2 As SizeF _
) As SizeF
用法
Dim sz1 As SizeF
Dim sz2 As SizeF
Dim returnValue As SizeF

returnValue = (sz1 + sz2)

public static SizeF operator + (
    SizeF sz1,
    SizeF sz2
)

public:
static SizeF operator + (
    SizeF sz1, 
    SizeF sz2
)

J# 不支持重载运算符。

JScript 支持使用重载运算符，但不支持进行新的声明。

参数

• sz1
  要相加的第一个 SizeF。

• sz2
  要相加的第二个 SizeF。

返回值

一个 Size 结构，它是该加法运算的结果。

示例

下面的代码示例使用下列成员向 ListBox 中添加阴影：

• op_Implicit

• op_Addition

• op_Implicit

• op_Addition

• SolidBrush

此示例旨在用于 Windows 窗体。若要运行此示例，请将此代码粘贴到一个窗体中，然后在处理该窗体的 Paint 事件时调用 AddShadow 方法。验证此窗体是否包含一个名为 listBox1 的 ListBox。

Private Sub AddShadow(ByVal e As PaintEventArgs)

    ' Create two SizeF objects.
    Dim shadowSize As SizeF = Size.op_Implicit(listBox1.Size)
    Dim addSize As New SizeF(10.5F, 20.8F)

    ' Add them together and save the result in shadowSize.
    shadowSize = SizeF.op_Addition(shadowSize, addSize)

    ' Get the location of the ListBox and convert it to a PointF.
    Dim shadowLocation As PointF = Point.op_Implicit(listBox1.Location)

    ' Add a Size to the Point to get a new location.
    shadowLocation = PointF.op_Addition(shadowLocation, New Size(5, 5))

    ' Create a rectangleF. 
    Dim rectFToFill As New RectangleF(shadowLocation, shadowSize)

    ' Create a custom brush using a semi-transparent color, and 
    ' then fill in the rectangle.
    Dim customColor As Color = Color.FromArgb(50, Color.Gray)
    Dim shadowBrush As SolidBrush = New SolidBrush(customColor)
    e.Graphics.FillRectangles(shadowBrush, _
        New RectangleF() {rectFToFill})

    ' Dispose of the brush.
    shadowBrush.Dispose()
End Sub

private void AddShadow(PaintEventArgs e)
{

    // Create two SizeF objects.
    SizeF shadowSize = listBox1.Size;
    SizeF addSize = new SizeF(10.5F, 20.8F);

    // Add them together and save the result in shadowSize.
    shadowSize = shadowSize + addSize;

    // Get the location of the ListBox and convert it to a PointF.
    PointF shadowLocation = listBox1.Location;

    // Add two points to get a new location.
    shadowLocation = shadowLocation + new Size(5, 5);

    // Create a rectangleF. 
    RectangleF rectFToFill = 
        new RectangleF(shadowLocation, shadowSize);

    // Create a custom brush using a semi-transparent color, and 
    // then fill in the rectangle.
    Color customColor = Color.FromArgb(50, Color.Gray);
    SolidBrush shadowBrush = new SolidBrush(customColor);
    e.Graphics.FillRectangles(shadowBrush, new RectangleF[]{rectFToFill});

    // Dispose of the brush.
    shadowBrush.Dispose();
}

private:
   void AddShadow( PaintEventArgs^ e )
   {
      // Create two SizeF objects.
      SizeF shadowSize = listBox1->Size;
      SizeF addSize = SizeF(10.5F,20.8F);

      // Add them together and save the result in shadowSize.
      shadowSize = shadowSize + addSize;

      // Get the location of the ListBox and convert it to a PointF.
      PointF shadowLocation = listBox1->Location;

      // Add two points to get a new location.
      shadowLocation = shadowLocation + System::Drawing::Size( 5, 5 );

      // Create a rectangleF. 
      RectangleF rectFToFill = RectangleF(shadowLocation,shadowSize);

      // Create a custom brush using a semi-transparent color, and 
      // then fill in the rectangle.
      Color customColor = Color::FromArgb( 50, Color::Gray );
      SolidBrush^ shadowBrush = gcnew SolidBrush( customColor );
      array<RectangleF>^ temp0 = {rectFToFill};
      e->Graphics->FillRectangles( shadowBrush, temp0 );

      // Dispose of the brush.
      delete shadowBrush;
   }

private void AddShadow(PaintEventArgs e)
{
    // Create two SizeF objects.
    SizeF shadowSize = Size.op_Implicit(listBox1.get_Size());
    SizeF addSize = new SizeF(10.5F, 20.8F);

    // Add them together and save the result in shadowSize.
    shadowSize.set_Width(shadowSize.get_Width() + addSize.get_Width());
    shadowSize.set_Height(shadowSize.get_Height() + addSize.get_Height());

    // Get the location of the ListBox and convert it to a PointF.
    PointF shadowLocation = Point.op_Implicit(listBox1.get_Location());

    // Add two points to get a new location.
    shadowLocation.set_X(shadowLocation.get_X()  
        + (new Size(5, 5).get_Width()));
    shadowLocation.set_Y(shadowLocation.get_Y()  
        + (new Size(5, 5).get_Height()));
    
    // Create a rectangleF. 
    RectangleF rectFToFill = new RectangleF(shadowLocation, shadowSize);

    // Create a custom brush using a semi-transparent color, and 
    // then fill in the rectangle.
    Color customColor = Color.FromArgb(50, Color.get_Gray());
    SolidBrush shadowBrush = new SolidBrush(customColor);

    e.get_Graphics().FillRectangles(shadowBrush, 
        new RectangleF[] { rectFToFill });

    // Dispose of the brush.
    shadowBrush.Dispose();
} //AddShadow

平台

Windows 98、Windows 2000 SP4、Windows Millennium Edition、Windows Server 2003、Windows XP Media Center Edition、Windows XP Professional x64 Edition、Windows XP SP2、Windows XP Starter Edition

.NET Framework 并不是对每个平台的所有版本都提供支持。有关受支持版本的列表，请参见系统要求。

版本信息

.NET Framework

受以下版本支持：2.0、1.1、1.0

请参见

参考

SizeF 结构
SizeF 成员
System.Drawing 命名空间