Graphics.GetNearestColor(Color) 方法

public:
 System::Drawing::Color GetNearestColor(System::Drawing::Color color);

public System.Drawing.Color GetNearestColor (System.Drawing.Color color);

member this.GetNearestColor : System.Drawing.Color -> System.Drawing.Color

Public Function GetNearestColor (color As Color) As Color

参数

返回

Color

一个 Color 结构，它表示与 color 参数指定的颜色最接近的颜色。A Color structure that represents the nearest color to the one specified with the color parameter.

示例

下面的代码示例旨在与 Windows 窗体一起使用，并且它需要作为 PaintEventArgs e Paint 事件处理程序的参数。The following code example is designed for use with Windows Forms, and it requires PaintEventArgse, which is a parameter of the Paint event handler. 此代码执行以下操作：The code performs the following actions:

• 使用 ARGB 坐标 (255、165、63、136) 创建任意颜色。Creates an arbitrary color with ARGB coordinates (255, 165, 63, 136).

• 创建纯色画笔，并将其颜色设置为指定的颜色。Creates a solid brush and sets its color to the specified color.

• 使用任意颜色填充椭圆。Fills an ellipse using the arbitrary color.

• 创建第二种颜色，并将其值设置为最接近的系统 ARGB 颜色。Creates a second color and sets its value to the nearest system ARGB color.

• 使用此颜色填充第二个椭圆。Fills a second ellipse with this color.

结果就是两个省略号：第一次用任意指定的颜色绘制，第二个绘制时的系统颜色与指定的颜色最接近。The result is two ellipses: the first drawn with the arbitrary specified color and the second drawn with the system color nearest the specified color.

public:
   void GetNearestColorColor( PaintEventArgs^ e )
   {
      // Create solid brush with arbitrary color.
      Color arbColor = Color::FromArgb( 255, 165, 63, 136 );
      SolidBrush^ arbBrush = gcnew SolidBrush( arbColor );

      // Fill ellipse on screen.
      e->Graphics->FillEllipse( arbBrush, 0, 0, 200, 100 );

      // Get nearest color.
      Color realColor = e->Graphics->GetNearestColor( arbColor );
      SolidBrush^ realBrush = gcnew SolidBrush( realColor );

      // Fill ellipse on screen.
      e->Graphics->FillEllipse( realBrush, 0, 100, 200, 100 );
   }

private void GetNearestColorColor(PaintEventArgs e)
{
    // Create solid brush with arbitrary color.
    Color arbColor = Color.FromArgb(255, 165, 63, 136);
    SolidBrush arbBrush = new SolidBrush(arbColor);

    // Fill ellipse on screen.
    e.Graphics.FillEllipse(arbBrush, 0, 0, 200, 100);

    // Get nearest color.
    Color realColor = e.Graphics.GetNearestColor(arbColor);
    SolidBrush realBrush = new SolidBrush(realColor);

    // Fill ellipse on screen.
    e.Graphics.FillEllipse(realBrush, 0, 100, 200, 100);
}

Private Sub GetNearestColorColor(ByVal e As PaintEventArgs)

    ' Create solid brush with arbitrary color.
    Dim arbColor As Color = Color.FromArgb(255, 165, 63, 136)
    Dim arbBrush As New SolidBrush(arbColor)

    ' Fill ellipse on screen.
    e.Graphics.FillEllipse(arbBrush, 0, 0, 200, 100)

    ' Get nearest color.
    Dim realColor As Color = e.Graphics.GetNearestColor(arbColor)
    Dim realBrush As New SolidBrush(realColor)

    ' Fill ellipse on screen.
    e.Graphics.FillEllipse(realBrush, 0, 100, 200, 100)
End Sub

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