/// <summary>
/// 获取缩略图尺寸
/// </summary>
/// <param name="width"></param>
/// <param name="height"></param>
/// <param name="mode"></param>
/// <param name="src"></param>
/// <returns></returns>
public static ThumbSize getTargetSize(int width, int height, SaveThumbnailMode mode, Image src)
{
ThumbSize t = new ThumbSize();
t.Src = new Size(src.Width, src.Height);
t.Point = new Point(0, 0);
if (mode == SaveThumbnailMode.ByWidth)
{
int newHeight = src.Height * width / src.Width;
t.New = new Size(width, newHeight);
return(t);
}
else if (mode == SaveThumbnailMode.ByHeight)
{
int newWidth = src.Width * height / src.Height;
t.New = new Size(newWidth, height);
return(t);
}
else if (mode == SaveThumbnailMode.ByWidthHeight)
{
t.New = new Size(width, height);
return(t);
}
else if (mode == SaveThumbnailMode.Cut)
{
return(getCutSize(width, height, mode, src));
}
return(getAutoSize(width, height, mode, src));
}
private static Boolean saveThumbSmall(String filename, ThumbnailType ttype)
{
int x = 0;
int y = 0;
SaveThumbnailMode sm = SaveThumbnailMode.Auto;
if (ttype == ThumbnailType.Small)
{
x = config.Instance.Site.PhotoThumbWidth;
y = config.Instance.Site.PhotoThumbHeight;
sm = config.Instance.Site.GetPhotoThumbMode();
}
else if (ttype == ThumbnailType.Medium)
{
x = config.Instance.Site.PhotoThumbWidthMedium;
y = config.Instance.Site.PhotoThumbHeightMedium;
}
else if (ttype == ThumbnailType.Big)
{
x = config.Instance.Site.PhotoThumbWidthBig;
y = config.Instance.Site.PhotoThumbHeightBig;
}
try {
saveThumbImagePrivate(filename, ttype, x, y, sm);
return(true);
}
catch (OutOfMemoryException ex) {
logger.Error("file format error: " + filename);
return(false);
}
}
private static void saveThumbSmall(String filename, ThumbnailType ttype)
{
int x = 0;
int y = 0;
SaveThumbnailMode sm = SaveThumbnailMode.Auto;
if (ttype == ThumbnailType.Small)
{
x = config.Instance.Site.PhotoThumbWidth;
y = config.Instance.Site.PhotoThumbHeight;
sm = SaveThumbnailMode.Cut;
}
else if (ttype == ThumbnailType.Medium)
{
x = config.Instance.Site.PhotoThumbWidthMedium;
y = config.Instance.Site.PhotoThumbHeightMedium;
}
else if (ttype == ThumbnailType.Big)
{
x = config.Instance.Site.PhotoThumbWidthBig;
y = config.Instance.Site.PhotoThumbHeightBig;
}
Image img = Image.FromFile(filename);
if (img.Size.Width <= x && img.Size.Height <= y)
{
File.Copy(filename, Img.GetThumbPath(filename, ttype));
}
else
{
Img.SaveThumbnail(filename, Img.GetThumbPath(filename, ttype), x, y, sm);
}
}
private static ThumbSize getCutSize(int width, int height, SaveThumbnailMode mode, Image src)
{
ThumbSize t = new ThumbSize();
if ((double)src.Width / (double)src.Height > (double)width / (double)height)
{
int newWidth = src.Height * width / height;
t.Src = new Size(newWidth, src.Height);
t.New = new Size(width, height);
t.Point = new Point((src.Width - newWidth) / 2, 0);
}
else
{
int newHeight = src.Width * height / width;
t.Src = new Size(src.Width, newHeight);
t.New = new Size(width, height);
t.Point = new Point(0, (src.Height - newHeight) / 2);
}
return(t);
}
private static ThumbSize getAutoSize(int width, int height, SaveThumbnailMode mode, Image src)
{
ThumbSize t = new ThumbSize();
t.Src = new Size(src.Width, src.Height);
t.Point = new Point(0, 0);
int newWidth = width;
int newHeight = height;
if ((double)src.Width / (double)src.Height > (double)width / (double)height)
{
newHeight = src.Height * width / src.Width;
}
else
{
newWidth = src.Width * height / src.Height;
}
t.New = new Size(newWidth, newHeight);
return(t);
}
private static void saveThumbImagePrivate( String filename, ThumbnailType ttype, int x, int y, SaveThumbnailMode sm )
{
using (Image img = Image.FromFile( filename )) {
if (img.Size.Width <= x && img.Size.Height <= y) {
File.Copy( filename, Img.GetThumbPath( filename, ttype ) );
}
else {
Img.SaveThumbnail( filename, Img.GetThumbPath( filename, ttype ), x, y, sm );
}
}
}
/// <summary>
/// 上传图片(自定义保存路径)，同时生成最小的缩略图
/// </summary>
/// <param name="uploadPath">保存路径(相对路径)</param>
/// <param name="postedFile">HttpFile</param>
/// <param name="picName">图片名称</param>
/// <param name="width">宽度</param>
/// <param name="height">高度</param>
/// <returns></returns>
public static Result SaveImg( String uploadPath, HttpFile postedFile, String picName, int width, int height, SaveThumbnailMode mode )
{
logger.Info( "uploadPath : " + uploadPath );
logger.Info( "picName : " + picName );
Result result = new Result();
CheckUploadPic( postedFile, result );
if (result.HasErrors) return result;
String str = PathHelper.Map( uploadPath );
String str2 = picName + "." + Img.GetImageExt( postedFile.ContentType );
String filename = Path.Combine( str, str2 );
try {
String oldFile = null;
if (file.Exists( filename )) {
oldFile = filename + "." + Guid.NewGuid() + Path.GetExtension( filename );
file.Move( filename, oldFile );
}
postedFile.SaveAs( filename );
try {
saveThumbImagePrivate( filename, ThumbnailType.Small, width, height, mode );
if (strUtil.HasText( oldFile )) {
file.Delete( oldFile );
}
}
catch (OutOfMemoryException ex) {
file.Delete( filename );
if (strUtil.HasText( oldFile )) {
file.Move( oldFile, filename );
}
String msg = "file format error: " + picName;
logger.Error( msg );
result.Add( msg );
return result;
}
}
catch (Exception exception) {
logger.Error( lang.get( "exPhotoUploadError" ) + ":" + exception.Message );
result.Add( lang.get( "exPhotoUploadErrorTip" ) );
return result;
}
result.Info = Path.GetFileName( Img.GetThumbPath( filename ) );
return result;
}
/// <summary>
/// 保存缩略图到磁盘(可指定宽高，可指定缩放模式)
/// </summary>
/// <param name="srcPath"></param>
/// <param name="destPath"></param>
/// <param name="width"></param>
/// <param name="height"></param>
/// <param name="mode"></param>
public static void SaveThumbnail(String srcPath, String destPath, int width, int height, SaveThumbnailMode mode)
{
try {
using (Image srcImg = Image.FromFile(srcPath)) {
ThumbSize t = getTargetSize(width, height, mode, srcImg);
using (Bitmap newImg = new Bitmap(t.New.Width, t.New.Height)) {
using (Graphics g = Graphics.FromImage(newImg)) {
g.InterpolationMode = InterpolationMode.High;
g.SmoothingMode = SmoothingMode.HighQuality;
g.Clear(Color.White);
g.DrawImage(srcImg, t.getNewRect(), t.getRect(), GraphicsUnit.Pixel);
try {
newImg.Save(destPath, ImageFormat.Jpeg);
}
catch (Exception e) {
throw e;
}
}
}
}
}
catch (OutOfMemoryException ex) {
logger.Error("file format error: " + srcPath);
}
}
/// <summary>
/// 上传图片(自定义保存路径)，同时生成最小的缩略图
/// </summary>
/// <param name="uploadPath">保存路径(相对路径)</param>
/// <param name="postedFile">HttpFile</param>
/// <param name="picName">图片名称</param>
/// <param name="width">宽度</param>
/// <param name="height">高度</param>
/// <returns></returns>
public static Result SaveImg(String uploadPath, HttpFile postedFile, String picName, int width, int height, SaveThumbnailMode mode)
{
logger.Info("uploadPath : " + uploadPath);
logger.Info("picName : " + picName);
Result result = new Result();
CheckUploadPic(postedFile, result);
if (result.HasErrors)
{
return(result);
}
String str = PathHelper.Map(uploadPath);
String str2 = picName + "." + Img.GetImageExt(postedFile.ContentType);
String filename = Path.Combine(str, str2);
try {
String oldFile = null;
if (file.Exists(filename))
{
oldFile = filename + "." + Guid.NewGuid() + Path.GetExtension(filename);
file.Move(filename, oldFile);
}
postedFile.SaveAs(filename);
try {
saveThumbImagePrivate(filename, ThumbnailType.Small, width, height, mode);
if (strUtil.HasText(oldFile))
{
file.Delete(oldFile);
}
}
catch (OutOfMemoryException ex) {
file.Delete(filename);
if (strUtil.HasText(oldFile))
{
file.Move(oldFile, filename);
}
String msg = "file format error: " + picName;
logger.Error(msg);
result.Add(msg);
return(result);
}
}
catch (Exception exception) {
logger.Error(lang.get("exPhotoUploadError") + ":" + exception.Message);
result.Add(lang.get("exPhotoUploadErrorTip"));
return(result);
}
result.Info = Path.GetFileName(Img.GetThumbPath(filename));
return(result);
}
private static void saveThumbImagePrivate(String filename, ThumbnailType ttype, int x, int y, SaveThumbnailMode sm)
{
using (Image img = Image.FromFile(filename)) {
if (img.Size.Width <= x && img.Size.Height <= y)
{
File.Copy(filename, Img.GetThumbPath(filename, ttype));
}
else
{
Img.SaveThumbnail(filename, Img.GetThumbPath(filename, ttype), x, y, sm);
}
}
}
private static ThumbSize getCutSize( int width, int height, SaveThumbnailMode mode, Image src )
{
ThumbSize t = new ThumbSize();
if ((double)src.Width / (double)src.Height > (double)width / (double)height) {
int newWidth = src.Height * width / height;
t.Src = new Size( newWidth, src.Height );
t.New = new Size( width, height );
t.Point = new Point( (src.Width - newWidth) / 2, 0 );
}
else {
int newHeight = src.Width * height / width;
t.Src = new Size( src.Width, newHeight );
t.New = new Size( width, height );
t.Point = new Point( 0, (src.Height - newHeight) / 2 );
}
return t;
}
private static ThumbSize getAutoSize( int width, int height, SaveThumbnailMode mode, Image src )
{
ThumbSize t = new ThumbSize();
t.Src = new Size( src.Width, src.Height );
t.Point = new Point( 0, 0 );
int newWidth = width;
int newHeight = height;
if ((double)src.Width / (double)src.Height > (double)width / (double)height)
newHeight = src.Height * width / src.Width;
else
newWidth = src.Width * height / src.Height;
t.New = new Size( newWidth, newHeight );
return t;
}
/// <summary>
/// 保存缩略图到磁盘(可指定宽高，可指定缩放模式)
/// </summary>
/// <param name="srcPath"></param>
/// <param name="destPath"></param>
/// <param name="width"></param>
/// <param name="height"></param>
/// <param name="mode"></param>
public static void SaveThumbnail( String srcPath, String destPath, int width, int height, SaveThumbnailMode mode )
{
using (Image srcImg = Image.FromFile( srcPath )) {
ThumbSize t = getTargetSize( width, height, mode, srcImg );
using (Bitmap newImg = new Bitmap( t.New.Width, t.New.Height )) {
using (Graphics g = Graphics.FromImage( newImg )) {
g.InterpolationMode = InterpolationMode.High;
g.SmoothingMode = SmoothingMode.HighQuality;
g.Clear( Color.Transparent );
g.DrawImage( srcImg, t.getNewRect(), t.getRect(), GraphicsUnit.Pixel );
try {
newImg.Save( destPath, ImageFormat.Jpeg );
}
catch (Exception e) {
throw e;
}
}
}
}
}
/// <summary>
/// 获取缩略图尺寸
/// </summary>
/// <param name="width"></param>
/// <param name="height"></param>
/// <param name="mode"></param>
/// <param name="src"></param>
/// <returns></returns>
public static ThumbSize getTargetSize( int width, int height, SaveThumbnailMode mode, Image src )
{
ThumbSize t = new ThumbSize();
t.Src = new Size( src.Width, src.Height );
t.Point = new Point( 0, 0 );
if (mode == SaveThumbnailMode.ByWidth) {
int newHeight = src.Height * width / src.Width;
t.New = new Size( width, newHeight );
return t;
}
else if (mode == SaveThumbnailMode.ByHeight) {
int newWidth = src.Width * height / src.Height;
t.New = new Size( newWidth, height );
return t;
}
else if (mode == SaveThumbnailMode.ByWidthHeight) {
t.New = new Size( width, height );
return t;
}
else if (mode == SaveThumbnailMode.Cut) {
return getCutSize( width, height, mode, src );
}
return getAutoSize( width, height, mode, src );
}
