LinearGradientBrush.Clone 方法

创建此 LinearGradientBrush 的一个精确副本。

**命名空间:**System.Drawing.Drawing2D
**程序集:**System.Drawing（在 system.drawing.dll 中）

语法

声明
Public Overrides Function Clone As Object
用法
Dim instance As LinearGradientBrush
Dim returnValue As Object

returnValue = instance.Clone

public override Object Clone ()

public:
virtual Object^ Clone () override

public Object Clone ()

public override function Clone () : Object

返回值

该方法创建的、强制转换为对象的 LinearGradientBrush。

示例

下面的代码示例适用于 Windows 窗体，它需要 PaintEventArgse，一个 OnPaint 事件对象。代码执行下列操作：

• 创建一个新的 LinearGradientBrush。

• 使用此画笔向屏幕绘制一个椭圆。

• 克隆 LinearGradientBrush（clonedLGBrush）。

• 使用克隆后的画笔直接在屏幕的第一个椭圆下面绘制一个椭圆。

Public Sub CloneExample(ByVal e As PaintEventArgs)

    ' Create a LinearGradientBrush.
    Dim x As Integer = 20
    Dim y As Integer = 20
    Dim h As Integer = 100
    Dim w As Integer = 200
    Dim myRect As New Rectangle(x, y, w, h)
    Dim myLGBrush As New LinearGradientBrush(myRect, Color.Blue, _
    Color.Aquamarine, 45.0F, True)

    ' Draw an ellipse to the screen using the LinearGradientBrush.
    e.Graphics.FillEllipse(myLGBrush, x, y, w, h)

    ' Clone the LinearGradientBrush.
    Dim clonedLGBrush As LinearGradientBrush = _
    CType(myLGBrush.Clone(), LinearGradientBrush)

    ' Justify the left edge of the gradient with the left edge of the
    ' ellipse.
    clonedLGBrush.TranslateTransform(-100.0F, 0.0F)

    ' Draw a second ellipse to the screen using the cloned HBrush.
    y = 150
    e.Graphics.FillEllipse(clonedLGBrush, x, y, w, h)
End Sub

private void CloneExample(PaintEventArgs e)
{
             
    // Create a LinearGradientBrush.
    int x=20, y=20, h=100, w=200;
    Rectangle myRect = new Rectangle(x, y, w, h);
    LinearGradientBrush myLGBrush = new LinearGradientBrush(
        myRect, Color.Blue, Color.Aquamarine, 45.0f, true);

    // Draw an ellipse to the screen using the LinearGradientBrush.
    e.Graphics.FillEllipse(myLGBrush, x, y, w, h);
             
    // Clone the LinearGradientBrush.
    LinearGradientBrush clonedLGBrush =
        (LinearGradientBrush)myLGBrush.Clone();
             
    // Justify the left edge of the gradient with the
    // left edge of the ellipse.
    clonedLGBrush.TranslateTransform(-100.0f, 0.0f);
             
    // Draw a second ellipse to the screen using the cloned HBrush.
    y=150;
    e.Graphics.FillEllipse(clonedLGBrush, x, y, w, h);
}

private:
   void CloneExample( PaintEventArgs^ e )
   {
      // Create a LinearGradientBrush.
      int x = 20,y = 20,h = 100,w = 200;
      Rectangle myRect = Rectangle(x,y,w,h);
      LinearGradientBrush^ myLGBrush = gcnew LinearGradientBrush( myRect,Color::Blue,Color::Aquamarine,45.0f,true );

      // Draw an ellipse to the screen using the LinearGradientBrush.
      e->Graphics->FillEllipse( myLGBrush, x, y, w, h );

      // Clone the LinearGradientBrush.
      LinearGradientBrush^ clonedLGBrush = dynamic_cast<LinearGradientBrush^>(myLGBrush->Clone());

      // Justify the left edge of the gradient with the
      // left edge of the ellipse.
      clonedLGBrush->TranslateTransform(  -100.0f, 0.0f );

      // Draw a second ellipse to the screen using the cloned HBrush.
      y = 150;
      e->Graphics->FillEllipse( clonedLGBrush, x, y, w, h );
   }

private void CloneExample(PaintEventArgs e)
{
    // Create a LinearGradientBrush.
    int x = 20;
    int y = 20;
    int h = 100;
    int w = 200;
    Rectangle myRect = new Rectangle(x, y, w, h);
    LinearGradientBrush myLGBrush = new LinearGradientBrush(myRect, 
        Color.get_Blue(), Color.get_Aquamarine(), 45, true);

    // Draw an ellipse to the screen using the LinearGradientBrush.
    e.get_Graphics().FillEllipse(myLGBrush, x, y, w, h);

    // Clone the LinearGradientBrush.
    LinearGradientBrush clonedLGBrush = ((LinearGradientBrush)(
        myLGBrush.Clone()));

    // Justify the left edge of the gradient with the
    // left edge of the ellipse.
    clonedLGBrush.TranslateTransform(-100, 0);

    // Draw a second ellipse to the screen using the cloned HBrush.
    y = 150;
    e.get_Graphics().FillEllipse(clonedLGBrush, x, y, w, h);
} //CloneExample

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

LinearGradientBrush 类
LinearGradientBrush 成员
System.Drawing.Drawing2D 命名空间