protected static Image GenerateThumbnail(Image img, Thumbnails.Size maxPxSize)
{
Size thumbnailSize = GetThumbnailSize(img, Thumbnails.Size.Px32);
return(img.GetThumbnailImage(thumbnailSize.Width,
thumbnailSize.Height, null, IntPtr.Zero));
}
public byte[] GetIcon(string type, Thumbnails.Size size)
{
var icon = IconsData[size].GetObject(type) as byte[];
if (icon == null)
{
return(IconsData[size].GetObject(BLANK) as byte[]);
}
return(icon);
}
public byte[] GetThumbnailForExtension(string extension, Thumbnails.Size pxSize = Thumbnails.Size.Px32)
{
try
{
return(iconsStorage.GetIcon(extension, pxSize));
}
catch (Exception)
{
return(iconsStorage.GetIcon("_blank", pxSize));
}
}
public byte[] GetThumbnailForMimeType(string mimeType, Thumbnails.Size pxSize = Thumbnails.Size.Px32)
{
try
{
var extension = MimeTypeMap.GetExtension(mimeType).Replace(".", "");
return(iconsStorage.GetIcon(extension, pxSize));
}
catch (Exception)
{
return(iconsStorage.GetIcon("_blank", pxSize));
}
}
protected static Size GetThumbnailSize(Image original, Thumbnails.Size maxPxSize)
{
double factor;
if (original.Width > original.Height)
{
factor = (double)maxPxSize / original.Width;
}
else
{
factor = (double)maxPxSize / original.Height;
}
return(new Size((int)(original.Width * factor), (int)(original.Height * factor)));
}
public void GetThumbnailForImageReturnsProperIcon_Px(Thumbnails.Size size)
{
var target = new IconThumbnail();
// Act
var blankIcon = target.GetThumbnailForMimeType("blank", size);
var pngIcon = target.GetThumbnailForMimeType("image/png", size);
var jpegIcon = target.GetThumbnailForMimeType("image/jpeg", size);
var bmpIcon = target.GetThumbnailForMimeType("image/bmp", size);
var tiffIcon = target.GetThumbnailForMimeType("image/tiff", size);
var gifIcon = target.GetThumbnailForMimeType("image/gif", size);
var xlsxIcon = target.GetThumbnailForMimeType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", size);
var xlsmIcon = target.GetThumbnailForMimeType("application/vnd.ms-excel.sheet.macroEnabled.12", size);
// Assert
CheckImageIcon(blankIcon, (int)size);
CheckImageIcon(pngIcon, (int)size);
CheckImageIcon(jpegIcon, (int)size);
CheckImageIcon(bmpIcon, (int)size);
CheckImageIcon(tiffIcon, (int)size);
CheckImageIcon(gifIcon, (int)size);
CheckImageIcon(xlsxIcon, (int)size);
CheckImageIcon(xlsmIcon, (int)size);
}
public ImageThumbnail(Stream image, Thumbnails.Size thumbnailMaxPxSize = Thumbnails.Size.Px32)
{
ImgThumbnail = GenerateThumbnail(Image.FromStream(image), thumbnailMaxPxSize);
}