public static void SendImageThumbnailAsStream(Stream stream, string filename, ImageFileKind imageFileKind)
{
string origFullFileName = Path.Combine(Files.UploadDirectoryPath, listImageFileDimensions.Where(ifd => ifd.ImageKind == ImageFileKind.Original).SingleOrDefault().DirectoryToSave, filename);
ImageFileDimension imageFileDimension = listImageFileDimensions.Where(ifd => ifd.ImageKind == imageFileKind).FirstOrDefault();
using (Image bitmap = Bitmap.FromFile(origFullFileName))
{
int origHeight = bitmap.Height;
int origWidth = bitmap.Width;
int newHeight = imageFileDimension.Height.Value;
int newWidth = imageFileDimension.Width.Value;
float widthRatio = ((float)newWidth) / origWidth;
float heightRatio = ((float)newHeight) / origHeight;
float ratio = (widthRatio < heightRatio ? widthRatio : heightRatio);// (widthRatio)MIN(maxWidth / Width, maxHeight / Height);
if (ratio >= 1.0f)
{
bitmap.Save(stream, allowedImageFiles[Path.GetExtension(origFullFileName)]);
}
else
{
using (Image resultBitmap = bitmap.GetThumbnailImage((int)(origWidth * ratio), (int)(origHeight * ratio), null, IntPtr.Zero))
{
resultBitmap.Save(stream, allowedImageFiles[Path.GetExtension(origFullFileName)]);
}
}
}
}
/// <summary>
/// Get directory path by image kind.
/// </summary>
/// <param name="imageFileKind"></param>
/// <param name="includeFullPath"></param>
/// <returns></returns>
public static string GetDirectoryToSaveWebPath(string directory)
{
ImageFileDimension dimensions = listImageFileDimensions.Where(ifd => ifd.DirectoryToSave == directory).FirstOrDefault();
if (dimensions != null)
{
return(Path.Combine(Files.uploadFileDirectory, dimensions.DirectoryToSave));
}
else
{
return(String.Empty);
}
}
/// <summary>
/// Resize image file and save it with new unique file name.
/// </summary>
/// <param name="bitmap">Bitmap instance.</param>
/// <param name="newFileName">Unique file name.</param>
/// <param name="imageFileDimension">ImageFileDimension instance.</param>
public static void ResizeImageFile(Bitmap bitmap, string newFileName, ImageFileDimension imageFileDimension)
{
int origHeight = bitmap.Height;
int origWidth = bitmap.Width;
int newWidth = origWidth;
int newHeight = origHeight;
int?targetHeight = imageFileDimension.Height;
int?targetWidth = imageFileDimension.Width;
string fullFileName = Path.Combine(Files.UploadDirectoryPath, imageFileDimension.DirectoryToSave, newFileName);
ImageFormat imageFormat = allowedImageFiles[Path.GetExtension(newFileName)];
if (imageFileDimension.Width == null && imageFileDimension.Height == null)
{
bitmap.Save(fullFileName, imageFormat);
}
else
{
if (imageFileDimension.Width == null)
{
newHeight = imageFileDimension.Height.Value;
if (origHeight > newHeight)
{
float heightRatio = (float)newHeight / origHeight;
newWidth = (int)(origWidth * heightRatio);
}
else
{
newHeight = origHeight;
}
targetWidth = newWidth;
targetHeight = newHeight;
}
else if (imageFileDimension.Height == null)
{
newWidth = imageFileDimension.Width.Value;
if (origWidth > newWidth)
{
float widthRatio = (float)newWidth / origWidth;
newHeight = (int)(origHeight * widthRatio);
}
else
{
newWidth = origWidth;
}
targetWidth = newWidth;
targetHeight = newHeight;
}
else
{
newHeight = imageFileDimension.Height.Value;
newWidth = imageFileDimension.Width.Value;
float widthRatio = ((float)newWidth) / origWidth;
float heightRatio = ((float)newHeight) / origHeight;
float ratio = (widthRatio > heightRatio ? widthRatio : heightRatio);// (widthRatio)MIN(maxWidth / Width, maxHeight / Height);
if (!imageFileDimension.IsCropped)
{
if (ratio < 1.0f)
{
newWidth = (int)(origWidth * ratio);
newHeight = (int)(origHeight * ratio);
}
else
{
targetWidth = newWidth = origWidth;
targetHeight = newHeight = origHeight;
}
}
else
{
newWidth = (int)(origWidth * ratio);
newHeight = (int)(origHeight * ratio);
}
}
Rectangle?rectF = null;
if (imageFileDimension.IsCropped)
{
rectF = new Rectangle(0, 0, targetWidth.Value, targetHeight.Value);
}
SaveResizedImageFile(bitmap, fullFileName, newWidth, newHeight, imageFormat, rectF);
}
}
