/// <summary>取得图片文件的宽高</summary>
/// <param name="srcFile"></param>
/// <param name="ww">取得图片的宽度</param>
/// <param name="hh">取得图片的高度</param>
/// <returns></returns>
public static bool Get_Pic_WW_HH(string srcFile, out int ww, out int hh)
{
string sExt = DirFileHelper.GetFileExtension(srcFile).ToLower();
if (sExt == "gif" || sExt == "jpg" || sExt == "jpeg" || sExt == "bmp" || sExt == "png")
{
if (srcFile.IndexOf(":") < 0)
{
srcFile = DirFileHelper.GetMapPath(srcFile);
}
if (DirFileHelper.IsExistFile(srcFile))
{
try
{
Image testImage = Image.FromFile(srcFile);
ww = testImage.Width;
hh = testImage.Height;
testImage.Dispose();
return(true);
}
catch (Exception ex)
{
throw ex;
}
}
}
ww = 0;
hh = 0;
return(false);
}
/// <summary>
/// 创建XML的根节点
/// </summary>
private void CreateXMLElement()
{
//创建一个XML对象
_xml = new XmlDocument();
if (DirFileHelper.IsExistFile(_filePath))
{
//加载XML文件
_xml.Load(this._filePath);
}
//为XML的根节点赋值
_element = _xml.DocumentElement;
}
/// <summary>在图片上生成图片水印</summary>
/// <param name="srcFile">要添加水印的图片</param>
/// <param name="top">上边距 为0时下边距生效</param>
/// <param name="bottom">下边距 上边距为0时生效</param>
/// <param name="left">左边距 为0时右边距生效</param>
/// <param name="right">右边距 左边距为0时生效</param>
/// <param name="limitWidth">原图小于该宽度,将不添加水印</param>
/// <param name="HighQuality">如果大于0，使用质量控制(50-100)</param>
/// <param name="_WaterPicPath">水印图片所在地址,默认:"/images/Water.png"</param>
public static void MakeWaterPic(string srcFile, int top = 0, int bottom = 10, int left = 0, int right = 10, int limitWidth = 300, int HighQuality = 0, string _WaterPicPath = "/images/Water.png")
{
#region 取得图片绝对地址
if (srcFile.IndexOf(":") < 0)
{
srcFile = DirFileHelper.GetMapPath(srcFile);
}
if (!DirFileHelper.IsExistFile(srcFile))
{
return;
}
#endregion
#region 取得水印图片
if (_WaterPicPath.IndexOf(":") < 0)
{
_WaterPicPath = DirFileHelper.GetMapPath(_WaterPicPath);
}
if (!DirFileHelper.IsExistFile(_WaterPicPath))
{
return;
}
#endregion
//---------------------------------------
#region 判断
Image srcImage = Image.FromFile(srcFile);
Image watImage = Image.FromFile(_WaterPicPath);
//水印图大于原图或原图小于300,不加水印
if (watImage.Width > srcImage.Width || srcImage.Width < limitWidth)
{
srcImage.Dispose();
watImage.Dispose();
return;
}
#endregion
//---------------------------------------
#region 位置
int x = 0, y = 0;
if (top != 0)
{
y = top;
if (left != 0)
{
x = left;
}
else
{
x = srcImage.Width - watImage.Width - right;
}
}
else if (bottom != 0)
{
y = srcImage.Height - watImage.Height - bottom;
if (left != 0)
{
x = left;
}
else
{
x = srcImage.Width - watImage.Width - right;
}
}
else
{
//居中
x = srcImage.Width / 2 - watImage.Width / 2;
y = srcImage.Height / 2 - watImage.Height / 2;
}
#endregion
//---------------------------------------
#region 保存
Bitmap bitmap = new Bitmap(srcImage);
Graphics g = Graphics.FromImage(bitmap);
g.DrawImage(watImage, new Rectangle(x, y, watImage.Width, watImage.Height), 0, 0, watImage.Width, watImage.Height, GraphicsUnit.Pixel);
srcImage.Dispose();
watImage.Dispose();
g.Dispose();
try
{
if (DirFileHelper.GetFileExtension(srcFile) == "png")
{
bitmap.Save(srcFile, System.Drawing.Imaging.ImageFormat.Png);
}
else//以jpg格式保存缩略图
{
//---------------------------------------
//高质量--使用分级图片质量
if (HighQuality > 0)
{
// 以下代码为保存图片时,设置压缩质量
EncoderParameters encoderParams = new EncoderParameters();
long[] quality = new long[1];
quality[0] = HighQuality; //50-100内
EncoderParameter encoderParam = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, quality);
encoderParams.Param[0] = encoderParam;
//获得包含有关内置图像编码解码器的信息的ImageCodecInfo 对象.
ImageCodecInfo[] arrayICI = ImageCodecInfo.GetImageEncoders();
ImageCodecInfo jpegICI = null;
for (int i = 0; i < arrayICI.Length; i++)
{
if (arrayICI[i].FormatDescription.Equals("JPEG"))
{
jpegICI = arrayICI[i];//设置JPEG编码
break;
}
}
//---------------------------------------
bitmap.Save(srcFile, jpegICI, encoderParams);
}
else
{
bitmap.Save(srcFile, System.Drawing.Imaging.ImageFormat.Jpeg);
}
}
}
catch (Exception e)
{
throw e;
}
finally
{
bitmap.Dispose();
}
#endregion
}
/// <summary>生成缩略图</summary>
/// <param name="srcFile">原图片路径(服务器路径d:\web\upload\100.jpg)</param>
/// <param name="decFile">缩略图路径(服务器路径d:\web\upload\100.jpg)</param>
/// <param name="iMaxWidth">限制的宽度</param>
/// <param name="iMaxHeight">限制的高度</param>
/// <param name="highQuality">如果大于0，使用质量控制(50-100)</param>
/// <param name="CutType">0=按比例生成宽高，1=固定图片宽高，2=固定背景宽高，图片按比例生成</param>
public static void MakeThumbImage(string srcFile, string decFile, int iMaxWidth, int iMaxHeight, int highQuality = 0, int CutType = 0)
{
#region 取得路径
if (srcFile.IndexOf(":") < 0)
{
srcFile = DirFileHelper.GetMapPath(srcFile);
}
if (decFile.IndexOf(":") < 0)
{
decFile = DirFileHelper.GetMapPath(decFile);
}
if (!DirFileHelper.IsExistFile(srcFile))
{
return;
}
#endregion
//---------------------------------------
#region 原始图片宽高
Image srcImage = Image.FromFile(srcFile);
int iSrcWidth = srcImage.Width;
int iSrcHeight = srcImage.Height;
#endregion
//---------------------------------------
#region 读取新图片宽高
int toWidth = 0, toHeight = 0, x = 0, y = 0;
if (CutType == 1)//固定宽高
{
toWidth = iMaxWidth;
toHeight = iMaxHeight;
}
else
{
//如果原始图,高度大于宽度,按高度缩放,如果宽度大高度按宽度缩放（不变形）
//如果图片缩放后,还是比限制大,再进行缩放,直接宽同度都不超过限制
if ((iSrcWidth < iMaxWidth) && (iSrcHeight < iMaxHeight))
{
toWidth = iSrcWidth;
toHeight = iSrcHeight;
}
else
{
if (iSrcHeight > iSrcWidth)
{
toHeight = iMaxHeight;
toWidth = iSrcWidth * iMaxHeight / iSrcHeight;
if (toWidth > iMaxWidth)
{
//toHeight 必须在 toWidth 前
toHeight = toHeight * iMaxWidth / toWidth;
toWidth = iMaxWidth;
}
}
else
{
toHeight = iSrcHeight * iMaxWidth / iSrcWidth;
toWidth = iMaxWidth;
if (toHeight > iMaxHeight)
{
//toWidth 必须在 toHeight 前
toWidth = toWidth * iMaxHeight / toHeight;
toHeight = iMaxHeight;
}
}
}
}
#endregion
#region 输出
Bitmap bitmap;
if (CutType == 2)
{
//2=固定背景宽高，图片按比例生成
bitmap = new Bitmap(iMaxWidth, iMaxHeight);
if (toWidth <= iMaxWidth && toHeight <= iMaxHeight)
{
x = Convert.ToInt16((iMaxWidth - toWidth) / 2);
y = Convert.ToInt16((iMaxHeight - toHeight) / 2);
}
else
{
if (toWidth < toHeight)
{
x = Convert.ToInt16((iMaxWidth - toWidth) / 2);
}
else
{
y = Convert.ToInt16((iMaxHeight - toHeight) / 2);
}
}
}
else
{
bitmap = new Bitmap(toWidth, toHeight);
}
Graphics g = Graphics.FromImage(bitmap);
//高质量
//g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
//设置高质量插值法
g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
//设置高质量,低速度呈现平滑程度
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
//清空画布并以透明背景色填充
//g.Clear(System.Drawing.Color.Transparent);
g.Clear(System.Drawing.Color.White);
//在指定位置并且按指定大小绘制原图片的指定部分
g.DrawImage(srcImage, new Rectangle(x, y, toWidth, toHeight), new Rectangle(0, 0, iSrcWidth, iSrcHeight), GraphicsUnit.Pixel);
srcImage.Dispose();
g.Dispose();
try
{
if (DirFileHelper.GetFileExtension(srcFile) == "png")
{
bitmap.Save(decFile, System.Drawing.Imaging.ImageFormat.Png);
}
else//以jpg格式保存缩略图
{
//---------------------------------------
//高质量--使用分级图片质量
if (highQuality > 0)
{
// 以下代码为保存图片时,设置压缩质量
var encoderParams = new EncoderParameters();
var quality = new long[1];
quality[0] = highQuality; //50-100内
var encoderParam = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, quality);
encoderParams.Param[0] = encoderParam;
//获得包含有关内置图像编码解码器的信息的ImageCodecInfo 对象.
ImageCodecInfo[] arrayIci = ImageCodecInfo.GetImageEncoders();
ImageCodecInfo jpegIci = null;
for (int i = 0; i < arrayIci.Length; i++)
{
if (arrayIci[i].FormatDescription.Equals("JPEG"))
{
jpegIci = arrayIci[i];
//设置JPEG编码
break;
}
}
//---------------------------------------
bitmap.Save(decFile, jpegIci, encoderParams);
}
else
{
bitmap.Save(decFile, System.Drawing.Imaging.ImageFormat.Jpeg);
}
}
}
catch (Exception e)
{
throw e;
}
finally
{
bitmap.Dispose();
}
#endregion
}
/// <summary>上传文件，并按设置生成缩略图，水印</summary>
/// <returns></returns>
public bool UploadFile(HttpPostedFile oFile = null)
{
#region 检查设置
if (!this.IsEnabled)
{
SendResponse(500, "");
return(false);
}
if (this.IsChkSrcPost)
{
if (!RequestHelper.ChkSrcPost())
{
SendResponse(501, "");
return(false);
}
}
if (this._savePath.Length < 1)
{
SendResponse(101, "SavePath未设置");
return(false);
}
if (oFile == null)
{
if (this.FilePostName.Length < 1)
{
SendResponse(101, "filePostName未设置");
return(false);
}
}
this._savePath = DirFileHelper.FixDirPath(_savePath) + DateTime.Now.ToString("yyMM") + "/";
bool isOk = DirFileHelper.CheckSaveDir(this._savePath);
if (!isOk)
{
SendResponse(101, "SavePath设置不当:" + this._savePath + ", 或权限不足！");
return(false);
}
#endregion
//------------------------------------------------
#region 获取文件对象
//获取文件对象
if (oFile == null)
{
oFile = HttpContext.Current.Request.Files[FilePostName];
}
if (oFile == null)
{
SendResponse(201, "");
return(false);
}
//------------------------------------------------
//原始文件名;
this.SrcName = Path.GetFileName(oFile.FileName);
#endregion
//------------------------------------------------
#region 检查文件大小
this._fileSize = oFile.ContentLength;
//不能上传小于10字节的内容
if (this.SrcName.Length < 3 || this._fileSize < 10)
{
SendResponse(201, "");
return(false);
}
//检测文件大小是否超过限制
if (this._fileSize > (this._maxSize * 1024))
{
SendResponse(301, "");
return(false);
}
#endregion
//------------------------------------------------
#region 检查文件类型
this.FileExt = Path.GetExtension(this.SrcName).ToLower().TrimStart('.');
if (!checkAllowedExt(this.FileExt))
{
SendResponse(202, "");
return(false);
}
#endregion
#region 文件
//上传
string sServerDir = _savePath;
if (sServerDir.IndexOf(":") < 0)
{
sServerDir = DirFileHelper.FixDirPath(DirFileHelper.GetMapPath(sServerDir));
}
string sNewFile = ""; //新文件名(系统生成)
string sNewRoot = ""; //新文件路径(绝对路径)
while (true)
{
sNewFile = FileOperateHelper.GetRndFileName("." + this.FileExt);
sNewRoot = System.IO.Path.Combine(sServerDir, sNewFile);
if (!DirFileHelper.IsExistFile(sNewRoot))
{
try
{
oFile.SaveAs(sNewRoot);
}
catch
{
SendResponse(204, "");
return(false);
}
break;
}
}
this.NewFile = sNewFile;
this.NewPath = _savePath + sNewFile;
#endregion
//------------------------------------------------
#region 生成缩略图 + 水印
if (this.FileExt == "jpg" || this.FileExt == "png" || this.FileExt == "gif" || this.FileExt == "jpeg" || this.FileExt == "bmp")
{
#region 取得原始尺寸
try//能取得图片宽高，是真实的图片
{
Image testImage1 = Image.FromFile(sNewRoot);
this.SrcWidth = testImage1.Width;
this.SrcHeight = testImage1.Height;
testImage1.Dispose();
this.NewWidth = this.SrcWidth;
this.NewHeight = this.SrcHeight;
}
catch
{
//非法格式，不是真正的图片
DirFileHelper.DeleteFile(sNewRoot);
SendResponse(202, "");
return(false);
}
//------------------------------------------------
//先备份原始图
var tmpPath = "";
tmpPath = System.IO.Path.Combine(sServerDir, DirFileHelper.GetFileNamePostfix(sNewFile, "o"));
DirFileHelper.CopyFile(sNewRoot, tmpPath);
#endregion
if (this._isFixPic || this._isBigPic || this._isMidPic || this._isMinPic)
{
#region 创建大图
if (this._isBigPic)
{
tmpPath = System.IO.Path.Combine(sServerDir, DirFileHelper.GetFileNamePostfix(sNewFile, "b"));
if (this._bigWidth > 0 && this._bigHeight > 0)
{
//缩略
MakeThumbImage(sNewRoot, tmpPath, this._bigWidth, this._bigHeight, this._bigQuality, this.CutType);
}
else//因为不限制宽高，所以直接复制出来就行了
{
DirFileHelper.CopyFile(sNewRoot, tmpPath);
}
//添加水印
if (this.IsWaterPic)
{
MakeWaterPic(tmpPath);
}
}
#endregion
//------------------------------------------------
#region 创建中图
if (this._isMidPic)
{
tmpPath = System.IO.Path.Combine(sServerDir, DirFileHelper.GetFileNamePostfix(sNewFile, "m"));
if (this._midWidth > 0 && this._midHeight > 0)
{
//缩略图
MakeThumbImage(sNewRoot, tmpPath, this._midWidth, this._midHeight, this._midQuality, this.CutType);
}
else//因为不限制宽高，所以直接复制出来就行了
{
DirFileHelper.CopyFile(sNewRoot, tmpPath);
}
//添加水印
if (this.IsWaterPic)
{
MakeWaterPic(tmpPath);
}
}
#endregion
//------------------------------------------------
#region 创建小图
if (this._isMinPic)
{
tmpPath = System.IO.Path.Combine(sServerDir, DirFileHelper.GetFileNamePostfix(sNewFile, "s"));
if (this._minWidth > 0 && this._minHeight > 0)
{
//缩略图
MakeThumbImage(sNewRoot, tmpPath, this._minWidth, this._minHeight, this._minQuality, this.CutType);
}
else//因为不限制宽高，所以直接复制出来就行了
{
DirFileHelper.CopyFile(sNewRoot, tmpPath);
}
//微型图不用加水印
}
#endregion
//------------------------------------------------
#region 创建推荐图
if (this._isHotPic)
{
tmpPath = System.IO.Path.Combine(sServerDir, DirFileHelper.GetFileNamePostfix(sNewFile, "h"));
if (this._hotWidth > 0 && this._hotHeight > 0)
{
//缩略图
MakeThumbImage(sNewRoot, tmpPath, this._hotWidth, this._hotHeight, this._hotQuality, this.CutType);
}
else//因为不限制宽高，所以直接复制出来就行了
{
DirFileHelper.CopyFile(sNewRoot, tmpPath);
}
//添加水印
if (this.IsWaterPic)
{
MakeWaterPic(tmpPath);
}
}
#endregion
//------------------------------------------------
#region 限制列表图
if (this._isFixPic && this._picWidth > 0 && this._picHeight > 0)
{
MakeThumbImage(sNewRoot, sNewRoot, this._picWidth, this._picHeight, this._picQuality, this.CutType);
}
#endregion
#region 取得缩放后的图片宽高
try
{
Image testImage2 = Image.FromFile(sNewRoot);
this.NewWidth = testImage2.Width;
this.NewHeight = testImage2.Height;
testImage2.Dispose();
}
catch
{
DirFileHelper.DelPicFile(this.NewPath);
SendResponse(202, "");
return(false);
}
#endregion
}
//列表图是否加水印
if (DirFileHelper.IsExistFile(sNewRoot) && this.IsWaterPic)
{
MakeWaterPic(sNewRoot);
}
}
#endregion
//上传成功!!
return(true);
}