public FileEntity UploadImageThumbnailByWidth
(HttpPostedFile fileData, string fileFolder, string physicalpath, int width, int height, string prefix = "")
{
ThumnailMode mode = ThumnailMode.EqualW;
string fileType = "jpg";
FileEntity file = new FileEntity();
if (fileData != null)
{
try
{
string filePath = physicalpath + "/";
if (!Directory.Exists(filePath))
{
Directory.CreateDirectory(filePath);
}
file.DisplayName = Path.GetFileName(fileData.FileName);
file.Extension = Path.GetExtension(file.DisplayName);
file.Size = fileData.ContentLength;
file.ContentType = fileData.ContentType;
file.CreateTime = DateTime.Now;
file.DbName = GetFileDBName(file.Extension);
file.FilePath = "/" + fileFolder + "/" + file.DbName;
Image image = Image.FromStream(fileData.InputStream);
int outWidth = 0;
int outHeight = 0;
ThumbnailHelper.CreateOutWAndH(image, filePath + file.DbName, width, height, mode, fileType, out outWidth, out outHeight);
file.ImageWidth = outWidth;
file.ImageHeight = outHeight;
return(file);
}
catch (Exception ex)
{
WebLogAgent.Write(ex);
return(null);
}
}
else
{
return(null);
}
}
public static void Create(Image originalImage, string outputFileName, int width, int height, ThumnailMode mode, string fileType)
{
Image bitmap = null;
Graphics g = null;
int towidth = width;
int toheight = height;
int x = 0;
int y = 0;
int ow = originalImage.Width;
int oh = originalImage.Height;
switch (mode)
{
case ThumnailMode.EqualW:
toheight = originalImage.Height * width / originalImage.Width;
break;
case ThumnailMode.HW:
break;
case ThumnailMode.W:
if (ow > towidth)
{
toheight = originalImage.Height * width / originalImage.Width;
}
else
{
towidth = ow;
toheight = oh;
}
break;
case ThumnailMode.H:
towidth = originalImage.Width * height / originalImage.Height;
break;
case ThumnailMode.Cut:
if ((double)originalImage.Width / (double)originalImage.Height > (double)towidth / (double)toheight)
{
oh = originalImage.Height;
ow = originalImage.Height * towidth / toheight;
y = 0;
x = (originalImage.Width - ow) / 2;
}
else
{
ow = originalImage.Width;
oh = originalImage.Width * height / towidth;
x = 0;
y = (originalImage.Height - oh) / 2;
}
break;
default:
break;
}
bitmap = new Bitmap(towidth, toheight);
g = Graphics.FromImage(bitmap);
g.InterpolationMode = InterpolationMode.High;
g.SmoothingMode = SmoothingMode.HighQuality;
g.Clear(Color.Transparent);
g.DrawImage(originalImage, new Rectangle(0, 0, towidth, toheight), new Rectangle(x, y, ow, oh), GraphicsUnit.Pixel);
fileType = fileType.ToLower();
ImageFormat imageFormat = ImageFormat.Jpeg;
if (fileType == "gif")
{
imageFormat = ImageFormat.Gif;
}
if (fileType == "bmp")
{
imageFormat = ImageFormat.Bmp;
}
if (fileType == "png")
{
imageFormat = ImageFormat.Png;
}
if (fileType == "jpg" || fileType == "jpeg")
{
imageFormat = ImageFormat.Jpeg;
}
bitmap.Save(outputFileName, imageFormat);
if (originalImage != null)
{
originalImage.Dispose();
}
if (bitmap != null)
{
bitmap.Dispose();
}
if (g != null)
{
g.Dispose();
}
}
public static void Create(string inputFileName, string outputFileName, int width, int height, ThumnailMode mode, string fileType)
{
Image originalImage = Image.FromFile(inputFileName);
Create(originalImage, outputFileName, width, height, mode, fileType);
}
