Bitmap.GetPixel(Int32, Int32) 方法  
定义
重要
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获取此 Bitmap中指定像素的颜色。
public:
 System::Drawing::Color GetPixel(int x, int y);public System.Drawing.Color GetPixel (int x, int y);member this.GetPixel : int * int -> System.Drawing.ColorPublic Function GetPixel (x As Integer, y As Integer) As Color参数
- x
- Int32
要检索的像素的 x 坐标。
- y
- Int32
要检索的像素的 y 坐标。
返回
表示指定像素颜色的 Color 结构。
例外
操作失败。
示例
下面的代码示例设计用于 Windows 窗体,它需要 PaintEventArgse,这是 Paint 事件处理程序的参数。 该代码获取位图中像素的颜色,然后使用该颜色填充矩形。
private:
   void GetPixel_Example( PaintEventArgs^ e )
   {
      // Create a Bitmap object from an image file.
      Bitmap^ myBitmap = gcnew Bitmap( "Grapes.jpg" );
      // Get the color of a pixel within myBitmap.
      Color pixelColor = myBitmap->GetPixel( 50, 50 );
      // Fill a rectangle with pixelColor.
      SolidBrush^ pixelBrush = gcnew SolidBrush( pixelColor );
      e->Graphics->FillRectangle( pixelBrush, 0, 0, 100, 100 );
   }
private void GetPixel_Example(PaintEventArgs e)
{
    // Create a Bitmap object from an image file.
    Bitmap myBitmap = new Bitmap("Grapes.jpg");
    // Get the color of a pixel within myBitmap.
    Color pixelColor = myBitmap.GetPixel(50, 50);
    // Fill a rectangle with pixelColor.
    SolidBrush pixelBrush = new SolidBrush(pixelColor);
    e.Graphics.FillRectangle(pixelBrush, 0, 0, 100, 100);
}
Private Sub GetPixel_Example(ByVal e As PaintEventArgs)
    ' Create a Bitmap object from an image file.
    Dim myBitmap As New Bitmap("Grapes.jpg")
    ' Get the color of a pixel within myBitmap.
    Dim pixelColor As Color = myBitmap.GetPixel(50, 50)
    ' Fill a rectangle with pixelColor.
    Dim pixelBrush As New SolidBrush(pixelColor)
    e.Graphics.FillRectangle(pixelBrush, 0, 0, 100, 100)
End Sub