Image Resizing and Cropping In C#

This is the Code Resizing and Copiying The image

public static System.Drawing.Image CropImage(System.Drawing.Image Image, int Height, int Width)
{
return CropImage(Image, Height, Width, 0,0);
}

//The crop image sub
public static System.Drawing.Image CropImage(System.Drawing.Image Image, int Height, int Width, int StartAtX, int StartAtY)
{
Image outimage;
MemoryStream mm = null;
try
{
//check the image height against our desired image height
if (Image.Height < Height) {
Height = Image.Height;
}

if (Image.Width < Width) {
Width = Image.Width;
}

//create a bitmap window for cropping
Bitmap bmPhoto = new Bitmap(Width, Height, PixelFormat.Format24bppRgb);
bmPhoto.SetResolution(72, 72);

//create a new graphics object from our image and set properties
Graphics grPhoto = Graphics.FromImage(bmPhoto);
grPhoto.SmoothingMode = SmoothingMode.AntiAlias;
grPhoto.InterpolationMode = InterpolationMode.HighQualityBicubic;
grPhoto.PixelOffsetMode = PixelOffsetMode.HighQuality;

//now do the crop
grPhoto.DrawImage(Image, new Rectangle(0, 0, Width, Height), StartAtX, StartAtY, Width, Height, GraphicsUnit.Pixel);

// Save out to memory and get an image from it to send back out the method.
mm = new MemoryStream();
bmPhoto.Save(mm, System.Drawing.Imaging.ImageFormat.Jpeg);
Image.Dispose();
bmPhoto.Dispose();
grPhoto.Dispose();
outimage = Image.FromStream(mm);

return outimage;
}
catch (Exception ex)
{
throw new Exception("Error cropping image, the error was: " + ex.Message);
}
}

//Hard resize attempts to resize as close as it can to the desired size and then crops the excess
public static System.Drawing.Image HardResizeImage(int Width, int Height, System.Drawing.Image Image)
{
int width = Image.Width;
int height = Image.Height;
Image resized = null;
if (Width > Height)
{
resized = ResizeImage(Width, Width, Image);
}
else
{
resized = ResizeImage(Height, Height, Image);
}
Image output = CropImage(resized, Height, Width);
//return the original resized image
return output;
}

//Image resizing
public static System.Drawing.Image ResizeImage(int maxWidth, int maxHeight, System.Drawing.Image Image)
{
int width = Image.Width;
int height = Image.Height;
if (width > maxWidth || height > maxHeight)
{
//The flips are in here to prevent any embedded image thumbnails -- usually from cameras
//from displaying as the thumbnail image later, in other words, we want a clean
//resize, not a grainy one.
Image.RotateFlip(System.Drawing.RotateFlipType.Rotate180FlipX);
Image.RotateFlip(System.Drawing.RotateFlipType.Rotate180FlipX);

float ratio = 0;
if (width > height)
{
ratio = (float)width / (float)height;
width = maxWidth;
height = Convert.ToInt32(Math.Round((float)width / ratio));
}
else
{
ratio = (float)height / (float)width;
height = maxHeight;
width = Convert.ToInt32(Math.Round((float)height / ratio));
}

//return the resized image
return Image.GetThumbnailImage(width, height, null, IntPtr.Zero);
}
//return the original resized image
return Image;
}


Hoe to Use Above Function


public static string Crop(this System.Drawing.Imaging ThisImage, int maxHeight, int maxWidth)
{
return CropImage(ThisImage, maxHeight, maxWidth);
}

public static string Resize(this System.Drawing.Imaging ThisImage, int Height, int Width)
{
return ResizeImage(Width, Height, ThisImage);
}

public static string HardResize(this System.Drawing.Imaging ThisImage, int Height, int Width)
{
return HardResizeImage(Width, Height, ThisImage);
}