Bitmap.GetPixel(Int32, Int32) 方法

定義

命名空間:

System.Drawing

組件:

System.Drawing.Common.dll

套件:

System.Drawing.Common v9.0.0-preview.6.24327.6

來源:

Bitmap.cs

取得這個 Bitmap中指定圖元的色彩。

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.Color

Public Function GetPixel (x As Integer, y As Integer) As Color

參數

x

Int32

要擷取之圖元的 X 座標。

y

Int32

要擷取之圖元的 Y 座標。

傳回

Color

Color 結構，表示指定圖元的色彩。

例外狀況

ArgumentOutOfRangeException

x 小於 0，或大於或等於 Width。

-或-

y 小於 0，或大於或等於 Height。

Exception

作業失敗。

範例

下列程式代碼範例是專為搭配 Windows Forms 使用而設計，而且需要 PaintEventArgse，這是 Paint 事件處理程式的參數。 程序代碼會取得位圖中像素的色彩，然後使用該色彩填滿矩形。

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