Just Copy this function into your code and use it to resize the bitmap image with corresponding aspect Ratio.
private Bitmap ResizeImage(Bitmap image, int width, int height)
{
Bitmap OriginalBmp = image;
int OriginalWidth = OriginalBmp.Width;
int OriginalHeight = OriginalBmp.Height;
int OriginalX = 0;
int OriginalY = 0;
int NewX = 0;
int NewY = 0;
float Percent = 0;
float WidthPercent = 0;
float HeightPercent = 0;
WidthPercent = ((float)width / (float)OriginalWidth);
HeightPercent = ((float)height / (float)OriginalHeight);
if (HeightPercent < WidthPercent)
{
Percent = HeightPercent;
NewX = System.Convert.ToInt32((width – (OriginalWidth * Percent)) / 2);
}
else
{
Percent = WidthPercent;
NewY = System.Convert.ToInt32((height – (OriginalHeight * Percent)) / 2);
}
int DestWidth = (int)(OriginalWidth * Percent);
int DestHeight = (int)(OriginalHeight * Percent);
Bitmap NewImage = new Bitmap(width, height, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
NewImage.SetResolution(OriginalBmp.HorizontalResolution, OriginalBmp.VerticalResolution);
Graphics Gr = Graphics.FromImage(NewImage);
Gr.Clear(Color.White);
Gr.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
Gr.DrawImage(OriginalBmp, new Rectangle(NewX, NewY, DestWidth, DestHeight), new Rectangle(OriginalX, OriginalY, OriginalWidth, OriginalHeight), GraphicsUnit.Pixel);
Gr.Dispose();
OriginalBmp.Dispose();
MemoryStream Ms = new MemoryStream();
return NewImage;
}