/// <summary>
/// http://www.switchonthecode.com/tutorials/csharp-tutorial-image-editing-saving-cropping-and-resizing
/// </summary>
/// <param name="image"></param>
/// <param name="size"></param>
/// <returns></returns>
public static Image ImageResize(Image image, Size size, DominantMeasure dominantMeasure = DominantMeasure.Auto)
{
int sourceWidth = image.Width;
int sourceHeight = image.Height;
float nPercent = 0;
float nPercentW = 0;
float nPercentH = 0;
nPercentW = ((float)size.Width / (float)sourceWidth);
nPercentH = ((float)size.Height / (float)sourceHeight);
#region calcolo misura dominante (larghezza o altezza)
if (dominantMeasure == DominantMeasure.Auto)
{
if (nPercentH < nPercentW)
{
nPercent = nPercentH;
}
else
{
nPercent = nPercentW;
}
}
else if (dominantMeasure == DominantMeasure.Width)
{
nPercent = nPercentW;
}
else if (dominantMeasure == DominantMeasure.Height)
{
nPercent = nPercentH;
}
#endregion
int destWidth = (int)(sourceWidth * nPercent);
int destHeight = (int)(sourceHeight * nPercent);
Bitmap b = new Bitmap(destWidth, destHeight);
Graphics g = Graphics.FromImage((Image)b);
g.InterpolationMode = InterpolationMode.HighQualityBicubic;
g.DrawImage(image, 0, 0, destWidth, destHeight);
g.Dispose();
return((Image)b);
}
/// <summary>
/// http://www.switchonthecode.com/tutorials/csharp-tutorial-image-editing-saving-cropping-and-resizing
/// </summary>
/// <param name="image"></param>
/// <param name="size"></param>
/// <returns></returns>
public static Image ImageResize(Image image, Size size, DominantMeasure dominantMeasure = DominantMeasure.Auto)
{
int sourceWidth = image.Width;
int sourceHeight = image.Height;
float nPercent = 0;
float nPercentW = 0;
float nPercentH = 0;
nPercentW = ((float)size.Width / (float)sourceWidth);
nPercentH = ((float)size.Height / (float)sourceHeight);
#region calcolo misura dominante (larghezza o altezza)
if (dominantMeasure == DominantMeasure.Auto)
{
if (nPercentH < nPercentW)
nPercent = nPercentH;
else
nPercent = nPercentW;
}
else if (dominantMeasure == DominantMeasure.Width)
nPercent = nPercentW;
else if (dominantMeasure == DominantMeasure.Height)
nPercent = nPercentH;
#endregion
int destWidth = (int)(sourceWidth * nPercent);
int destHeight = (int)(sourceHeight * nPercent);
Bitmap b = new Bitmap(destWidth, destHeight);
Graphics g = Graphics.FromImage((Image)b);
g.InterpolationMode = InterpolationMode.HighQualityBicubic;
g.DrawImage(image, 0, 0, destWidth, destHeight);
g.Dispose();
return (Image)b;
}