Image Resizing C# Code According To image Ratio

public string uplaodGallery(HttpPostedFile myFile)

{

string res = null;

string photoPath = null;

string PhotothumbPath = null;

string newfilename = null;

// int newfileSize = null;

string fileName = Path.GetFileNameWithoutExtension(newfilename);

string fileExt = Path.GetExtension(newfilename);

string thumbName = null;

string fullName = fileName + fileExt;

string uploadDir = Server.MapPath("../uploadImage/");

try

{

if (!Directory.Exists(uploadDir))

Directory.CreateDirectory(uploadDir);

/* for category */

photoPath = uploadDir + "/";

if (!Directory.Exists(photoPath))

Directory.CreateDirectory(photoPath);

PhotothumbPath = photoPath + "Thumb/";

if (!Directory.Exists(PhotothumbPath))

Directory.CreateDirectory(PhotothumbPath);

int nFileLen = myFile.ContentLength;

if (nFileLen == 0)

{

res = "E#There wasn't any file uploaded.";

return res;

}

/* Check file extension (must be JPG) */

if (System.IO.Path.GetExtension(myFile.FileName).ToLower() != ".jpg")

{

res = "E#The file must have an extension of JPG";

return res;

}

////////************************//*/*/*/

Graphics oGraphics = null;

Bitmap originalBMP = new Bitmap(myFile.InputStream);

Bitmap newBMP = null;

int newWidth = 0, newHeight = 0;

/* Calculate the new image dimensions */

float origWidth = originalBMP.Width;

float origHeight = originalBMP.Height;

if (origWidth > 800)

{

float sngRatio = origWidth / origHeight;

newWidth = int.Parse(ConfigurationManager.AppSettings.Get("ImageWidth").ToString()); //50;

int s = (int)sngRatio;

float newHeight1 = newWidth / sngRatio;

newHeight = (int)newHeight1;

// Create a new bitmap which will hold the previous resized bitmap

newBMP = new Bitmap(originalBMP, newWidth, newHeight); // Create a graphic based on the new bitmap

newBMP.SetResolution(50, 40);

//newBMP.SetResolution(int.Parse(ConfigurationManager.AppSettings.Get("quesImageWidth").ToString()), int.Parse(ConfigurationManager.AppSettings.Get("quesImageHeight").ToString()));

oGraphics = Graphics.FromImage(newBMP);

//newfileSize = newBMP;

}

else

{

newWidth = (int)origWidth;

newHeight = (int)origHeight;

oGraphics = Graphics.FromImage(originalBMP);

originalBMP.SetResolution(50, 40);

//originalBMP.SetResolution(int.Parse(ConfigurationManager.AppSettings.Get("quesImageWidth").ToString()), int.Parse(ConfigurationManager.AppSettings.Get("quesImageHeight").ToString()));

newBMP = originalBMP;

}

// Set the properties for the new graphic file

oGraphics.SmoothingMode = SmoothingMode.AntiAlias;

oGraphics.InterpolationMode = InterpolationMode.HighQualityBicubic; // Draw the new graphic based on the resized bitmap

oGraphics.DrawImage(originalBMP, 0, 0, newWidth, newHeight);

oGraphics.CompositingQuality = CompositingQuality.HighQuality;

newfilename = myFile.FileName;

fileName = Path.GetFileNameWithoutExtension(newfilename);

fileExt = Path.GetExtension(newfilename);

fileName = fileName; //+ "_" + txt_Name.Text;

fullName = fileName + fileExt;

int i = 0;

while(File.Exists(photoPath + fullName))

{

i++;

fullName = fileName + "_" + i + fileExt;

}

/* Thumb Image */

System.Drawing.Image.GetThumbnailImageAbort myCallBack = new System.Drawing.Image.GetThumbnailImageAbort(ThumbnailCallback);

int thumbHeight = int.Parse(ConfigurationManager.AppSettings["thumbHeight"].ToString());

int thumbWidth = int.Parse(ConfigurationManager.AppSettings["thumbWidth"].ToString());

System.Drawing.Image myThumbnail = newBMP.GetThumbnailImage(thumbWidth, thumbHeight, myCallBack, IntPtr.Zero);

thumbName = fileName + "_Thumb" + fileExt;

myThumbnail.Save(PhotothumbPath + thumbName, ImageFormat.Jpeg);

/* Save Original image */

Bitmap wmBitMap = new Bitmap(newBMP);

wmBitMap.Save(photoPath + fullName, ImageFormat.Jpeg);

UploadFiles.AddFiles(fullName, thumbName, fullName, 0, newWidth, newHeight, "I");

originalBMP.Dispose();

newBMP.Dispose();

oGraphics.Dispose();

}

catch (ArgumentException errArgument)

{

// The file wasn't a valid jpg file

res = "E#The file wasn't a valid jpg file.";

System.IO.File.Delete(photoPath + fullName);

}

res = fullName;

return res;

}