public static void ClipAndSaveFile(string sourcePath, string savePath, string saveName, FileSaveInfo saveInfo)
{
if (!File.Exists(sourcePath))
{
throw new Exception("文件不存在!");
}
else
{
int level = 100;
ImageCodecInfo ici = ImageCodecInfo.GetImageEncoders().SingleOrDefault(c => c.MimeType == "image/jpeg");
EncoderParameters ep = new EncoderParameters();
ep.Param[0] = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, level);
System.Drawing.Image bitmap = null;
System.Drawing.Image source = null;
try
{
bitmap = new System.Drawing.Bitmap(saveInfo.SaveWidth, saveInfo.SaveHeight);
source = System.Drawing.Image.FromFile(sourcePath);
System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmap);
//设定缩略图的生成质量
g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
g.Clear(System.Drawing.Color.Transparent);
g.DrawImage(source, new System.Drawing.Rectangle(0, 0, saveInfo.SaveWidth, saveInfo.SaveHeight), new System.Drawing.Rectangle(saveInfo.StartLeft, saveInfo.StartTop, saveInfo.Width, saveInfo.Height), System.Drawing.GraphicsUnit.Pixel);
CreatePath(savePath);
bitmap.Save(Path.Combine(savePath, saveName), ici, ep);
}
catch (Exception ex)
{
//保存缩略图出错处理
throw ex;
}
finally
{
if (source != null)
{
source.Dispose();
}
if (bitmap != null)
{
bitmap.Dispose();
}
}
}
}
public static void ThumbAndSaveFile(string sourcePath, string savePath, string saveName, FileSaveInfo saveInfo)
{
if (!File.Exists(sourcePath))
{
throw new Exception("文件不存在!");
}
else
{
Image source = null, img = null;
try
{
source = System.Drawing.Image.FromFile(sourcePath);
float bl = Math.Min((float)saveInfo.Width / source.Width, (float)saveInfo.Height / source.Height);
img = source.GetThumbnailImage((int)(source.Width * bl), (int)(source.Height * bl), null, new IntPtr());
CreatePath(savePath);
img.Save(Path.Combine(savePath, saveName), ImageFormat.Jpeg);
}
catch (Exception ex)
{
throw ex;
}
finally
{
if (source != null)
{
source.Dispose();
}
if (img != null)
{
img.Dispose();
}
}
}
}
