Metodo di estensione per clonare una Bitmap ridimensionandola

Scritto da  Massimo Bonanni il giovedì 10 febbraio 2011  •  Linguaggio: C#,VB   • Livello: 100


Questo semplice metodo di estensione accetta un oggetto di classe System.Drawing.Bitmap e ne restituisce una copia ridimensionata in base a un fattore x e un fattore y:

VB.NET

<Extension()> _

Public Function CloneResize(ByVal image As System.Drawing.Bitmap, _

                            ByVal zoomFactorWidth As Double, _

                            ByVal zoomFactorHeight As Double) As System.Drawing.Bitmap

    If image Is Nothing Then Throw New ArgumentNullException("image")

    Dim width = image.Width

    Dim height = image.Height

    Dim newImage = New System.Drawing.Bitmap(image, _

                          Convert.ToInt32(width * zoomFactorWidth), _

                          Convert.ToInt32(height * zoomFactorHeight))

    Return newImage

End Function

 

C#

public static System.Drawing.Bitmap CloneResize(this System.Drawing.Bitmap image,

                                                double zoomFactorWidth,

                                                double zoomFactorHeight)

{

  if (image == null) throw new ArgumentNullException("image");

  Int32 width = image.Width;

  Int32 height = image.Height;

  System.Drawing.Bitmap newImage =  new System.Drawing.Bitmap(image,

                        Convert.ToInt32(width * zoomFactorWidth),

                        Convert.ToInt32(height * zoomFactorHeight));

  return newImage;

}

 

 


Tags: extension methods

 
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