Bitmap.GetPixel(Int32, Int32) 方法
定义
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
参数
- x
- Int32
要检索的像素的 X 坐标。The x-coordinate of the pixel to retrieve.
- y
- Int32
要检索的像素的 Y 坐标。The y-coordinate of the pixel to retrieve.
返回
表示指定像素颜色的 Color 结构。A Color structure that represents the color of the specified pixel.
例外
x 小于 0,或者大于或等于 Width。x is less than 0, or greater than or equal to Width.
- 或 --or-
y 小于 0,或者大于或等于 Height。y is less than 0, or greater than or equal to Height.
此操作失败。The operation failed.
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. 此代码将获取位图中像素的颜色,然后使用该颜色填充矩形。The code gets the color of a pixel in a bitmap, and then fills a rectangle with that color.
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