ASP.NET 图片上传工具类 upload image简单好用功能齐全

使用方法：

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UploadImage ui = new UploadImage();             /***可选参数***/             ui.SetWordWater = "哈哈";//文字水印           // ui.SetPicWater = Server.MapPath("2.png");//图片水印(图片和文字都赋值图片有效)           ui.SetPositionWater = 4;//水印图片的位置 0居中、1左上角、2右上角、3左下角、4右下角             ui.SetSmallImgHeight = "110,40,20";//设置缩略图可以多个           ui.SetSmallImgWidth = "100,40,20";             //保存图片生成缩略图           var reponseMessage = ui.FileSaveAs(Request.Files[0], Server.MapPath("~/file/temp"));             //裁剪图片           var reponseMessage2 = ui.FileCutSaveAs(Request.Files[0], Server.MapPath("~/file/temp2"), 400, 300, UploadImage.CutMode.CutNo);                   /***返回信息***/           var isError = reponseMessage.IsError;//是否异常           var webPath = reponseMessage.WebPath;//web路径           var filePath = reponseMessage.filePath;//物理路径           var message = reponseMessage.Message;//错误信息           var directory = reponseMessage.Directory;//目录           var smallPath1 = reponseMessage.SmallPath(0);//缩略图路径1           var smallPath2 = reponseMessage.SmallPath(1);//缩略图路径2           var smallPath3 = reponseMessage.SmallPath(2);//缩略图路径3

　　

 

 效果：

 

源码：

 

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using System; using System.Collections.Generic; using System.Text; using System.IO; using System.Web; using System.Drawing; using System.Drawing.Imaging; using System.Drawing.Drawing2D; using System.Collections; using System.Net; using System.Text.RegularExpressions; using System.Configuration;   namespace SyntacticSugar {     /// <summary>     /// ** 描述：图片上传类、支持水印、缩略图     /// ** 创始时间：2015-5-28     /// ** 修改时间：-     /// ** 修改人：sunkaixuan     /// ** 使用说明：http://www.cnblogs.com/sunkaixuan/p/4536626.html     /// </summary>     public class UploadImage     {           #region 属性         /// <summary>         /// 允许图片格式         /// </summary>         public string SetAllowFormat { get; set; }         /// <summary>         /// 允许上传图片大小         /// </summary>         public double SetAllowSize { get; set; }         /// <summary>         /// 文字水印字符         /// </summary>         public string SetWordWater { get; set; }         /// <summary>         /// 图片水印         /// </summary>         public string SetPicWater { get; set; }         /// <summary>         /// 水印图片的位置 0居中、1左上角、2右上角、3左下角、4右下角         /// </summary>         public int SetPositionWater { get; set; }         /// <summary>         /// 缩略图宽度多个逗号格开（例如:200,100）         /// </summary>         public string SetSmallImgWidth { get; set; }         /// <summary>         /// 缩略图高度多个逗号格开（例如:200,100）         /// </summary>         public string SetSmallImgHeight { get; set; }         /// <summary>         /// 是否限制最大宽度，默认为true         /// </summary>         public bool SetLimitWidth { get; set; }         /// <summary>         /// 最大宽度尺寸，默认为600         /// </summary>         public int SetMaxWidth { get; set; }         /// <summary>         /// 是否剪裁图片，默认true         /// </summary>         public bool SetCutImage { get; set; }         /// <summary>         /// 限制图片最小宽度，0表示不限制         /// </summary>         public int SetMinWidth { get; set; }           #endregion           public UploadImage()         {             SetAllowFormat = ".jpeg|.jpg|.bmp|.gif|.png";   //允许图片格式             SetAllowSize = 1;       //允许上传图片大小,默认为1MB             SetPositionWater = 4;             SetCutImage = true;         }               #region main method             /// <summary>         /// 裁剪图片         /// </summary>         /// <param name="PostedFile">HttpPostedFile控件</param>         /// <param name="SavePath">保存路径【sys.config配置路径】</param>         /// <param name="oImgWidth">图片宽度</param>         /// <param name="oImgHeight">图片高度</param>         /// <param name="cMode">剪切类型</param>         /// <param name="ext">返回格式</param>         /// <returns>返回上传信息</returns>         public ResponseMessage FileCutSaveAs(System.Web.HttpPostedFile PostedFile, string SavePath, int oImgWidth, int oImgHeight, CutMode cMode)         {             ResponseMessage rm = new ResponseMessage();             try             {                 //获取上传文件的扩展名                 string sEx = System.IO.Path.GetExtension(PostedFile.FileName);                 if (!CheckValidExt(SetAllowFormat, sEx))                 {                     TryError(rm, 2);                     return rm;                 }                   //获取上传文件的大小                 double PostFileSize = PostedFile.ContentLength / 1024.0 / 1024.0;                   if (PostFileSize > SetAllowSize)                 {                     TryError(rm, 3);                     return rm;  //超过文件上传大小                 }                 if (!System.IO.Directory.Exists(SavePath))                 {                     System.IO.Directory.CreateDirectory(SavePath);                 }                 //重命名名称                 string NewfileName = DateTime.Now.Year.ToString() + DateTime.Now.Month.ToString() + DateTime.Now.Day.ToString() + DateTime.Now.Hour.ToString() + DateTime.Now.Minute.ToString() + DateTime.Now.Second.ToString() + DateTime.Now.Millisecond.ToString("000");                 string fName = "s" + NewfileName + sEx;                 string fullPath = Path.Combine(SavePath, fName);                 PostedFile.SaveAs(fullPath);                   //重命名名称                 string sNewfileName = DateTime.Now.Year.ToString() + DateTime.Now.Month.ToString() + DateTime.Now.Day.ToString() + DateTime.Now.Hour.ToString() + DateTime.Now.Minute.ToString() + DateTime.Now.Second.ToString() + DateTime.Now.Millisecond.ToString("000");                 string sFName = sNewfileName + sEx;                 rm.IsError = false;                 rm.FileName = sFName;                 string sFullPath = Path.Combine(SavePath, sFName);                 rm.filePath = sFullPath;                 rm.WebPath = "/"+sFullPath.Replace(HttpContext.Current.Server.MapPath("~/"), "").Replace("\\", "/");                 CreateSmallPhoto(fullPath, oImgWidth, oImgHeight, sFullPath, SetPicWater, SetWordWater, cMode);                 if (File.Exists(fullPath))                 {                     File.Delete(fullPath);                 }                 //压缩                 if (PostFileSize > 100)                 {                     CompressPhoto(sFullPath, 100);                 }             }             catch (Exception ex)             {                 TryError(rm, ex.Message);             }             return rm;         }               /// <summary>         /// 通用图片上传类         /// </summary>         /// <param name="PostedFile">HttpPostedFile控件</param>         /// <param name="SavePath">保存路径【sys.config配置路径】</param>         /// <param name="finame">返回文件名</param>         /// <param name="fisize">返回文件大小</param>         /// <returns>返回上传信息</returns>         public ResponseMessage FileSaveAs(System.Web.HttpPostedFile PostedFile, string SavePath)         {             ResponseMessage rm = new ResponseMessage();             try             {                 if (string.IsNullOrEmpty(PostedFile.FileName))                 {                     TryError(rm, 4);                     return rm;                 }                   Random rd = new Random();                 int rdInt = rd.Next(1000, 9999);                 //重命名名称                 string NewfileName = DateTime.Now.Year.ToString() + DateTime.Now.Month.ToString() + DateTime.Now.Day.ToString() + DateTime.Now.Hour.ToString() + DateTime.Now.Minute.ToString() + DateTime.Now.Second.ToString() + DateTime.Now.Millisecond.ToString() + rdInt;                   //获取上传文件的扩展名                 string sEx = System.IO.Path.GetExtension(PostedFile.FileName);                 if (!CheckValidExt(SetAllowFormat, sEx))                 {                     TryError(rm, 2);                     return rm;                 }                   //获取上传文件的大小                 double PostFileSize = PostedFile.ContentLength / 1024.0 / 1024.0;                   if (PostFileSize > SetAllowSize)                 {                     TryError(rm, 3);                     return rm;                 }                     if (!System.IO.Directory.Exists(SavePath))                 {                     System.IO.Directory.CreateDirectory(SavePath);                 }                   rm.FileName = NewfileName + sEx;                 string fullPath = SavePath.Trim('\\') + "\\" + rm.FileName;                 rm.WebPath = "/"+fullPath.Replace(HttpContext.Current.Server.MapPath("~/"), "").Replace("\\", "/");                 rm.filePath = fullPath;                 rm.Size = PostFileSize;                 PostedFile.SaveAs(fullPath);                     System.Drawing.Bitmap bmp = new Bitmap(fullPath);                 int realWidth = bmp.Width;                 int realHeight = bmp.Height;                 bmp.Dispose();                   #region 检测图片宽度限制                 if (SetMinWidth > 0)                 {                     if (realWidth < SetMinWidth)                     {                         TryError(rm, 7);                         return rm;                     }                 }                 #endregion                   #region 监测图片宽度是否超过600，超过的话，自动压缩到600                 if (SetLimitWidth && realWidth > SetMaxWidth)                 {                     int mWidth = SetMaxWidth;                     int mHeight = mWidth * realHeight / realWidth;                       string tempFile = SavePath + Guid.NewGuid().ToString() + sEx;                     File.Move(fullPath, tempFile);                     CreateSmallPhoto(tempFile, mWidth, mHeight, fullPath, "", "");                     File.Delete(tempFile);                 }                 #endregion                   #region 压缩图片存储尺寸                 if (sEx.ToLower() != ".gif")                 {                     CompressPhoto(fullPath, 100);                 }                 #endregion                       //生成缩略图片高宽                 if (string.IsNullOrEmpty(SetSmallImgWidth))                 {                     rm.Message = "上传成功,无缩略图";                     return rm;                 }                     string[] oWidthArray = SetSmallImgWidth.Split(',');                 string[] oHeightArray = SetSmallImgHeight.Split(',');                 if (oWidthArray.Length != oHeightArray.Length)                 {                     TryError(rm, 6);                     return rm;                 }                     for (int i = 0; i < oWidthArray.Length; i++)                 {                     if (Convert.ToInt32(oWidthArray[i]) <= 0 || Convert.ToInt32(oHeightArray[i]) <= 0)                         continue;                       string sImg = SavePath.TrimEnd('\\') + '\\' + NewfileName + "_" + i.ToString() + sEx;                       //判断图片高宽是否大于生成高宽。否则用原图                     if (realWidth > Convert.ToInt32(oWidthArray[i]))                     {                         if (SetCutImage)                             CreateSmallPhoto(fullPath, Convert.ToInt32(oWidthArray[i]), Convert.ToInt32(oHeightArray[i]), sImg, "", "");                         else                             CreateSmallPhoto(fullPath, Convert.ToInt32(oWidthArray[i]), Convert.ToInt32(oHeightArray[i]), sImg, "", "", CutMode.CutNo);                     }                     else                     {                         if (SetCutImage)                             CreateSmallPhoto(fullPath, realWidth, realHeight, sImg, "", "");                         else                             CreateSmallPhoto(fullPath, realWidth, realHeight, sImg, "", "", CutMode.CutNo);                     }                 }                   #region 给大图添加水印                 if (!string.IsNullOrEmpty(SetPicWater))                     AttachPng(SetPicWater, fullPath);                 else if (!string.IsNullOrEmpty(SetWordWater))                     AttachText(SetWordWater, fullPath);                 #endregion                 }             catch (Exception ex)             {                 TryError(rm, ex.Message);             }             return rm;         }           #region 验证格式         /// <summary>         /// 验证格式         /// </summary>         /// <param name="allType">所有格式</param>         /// <param name="chkType">被检查的格式</param>         /// <returns>bool</returns>         public bool CheckValidExt(string allType, string chkType)         {             bool flag = false;             string[] sArray = allType.Split('|');             foreach (string temp in sArray)             {                 if (temp.ToLower() == chkType.ToLower())                 {                     flag = true;                     break;                 }             }               return flag;         }         #endregion           #region 根据需要的图片尺寸，按比例剪裁原始图片         /// <summary>         /// 根据需要的图片尺寸，按比例剪裁原始图片         /// </summary>         /// <param name="nWidth">缩略图宽度</param>         /// <param name="nHeight">缩略图高度</param>         /// <param name="img">原始图片</param>         /// <returns>剪裁区域尺寸</returns>         public Size CutRegion(int nWidth, int nHeight, Image img)         {             double width = 0.0;             double height = 0.0;               double nw = (double)nWidth;             double nh = (double)nHeight;               double pw = (double)img.Width;             double ph = (double)img.Height;               if (nw / nh > pw / ph)             {                 width = pw;                 height = pw * nh / nw;             }             else if (nw / nh < pw / ph)             {                 width = ph * nw / nh;                 height = ph;             }             else             {                 width = pw;                 height = ph;             }               return new Size(Convert.ToInt32(width), Convert.ToInt32(height));         }         #endregion           #region 等比例缩小图片         public Size NewSize(int nWidth, int nHeight, Image img)         {             double w = 0.0;             double h = 0.0;             double sw = Convert.ToDouble(img.Width);             double sh = Convert.ToDouble(img.Height);             double mw = Convert.ToDouble(nWidth);             double mh = Convert.ToDouble(nHeight);               if (sw < mw && sh < mh)             {                 w = sw;                 h = sh;             }             else if ((sw / sh) > (mw / mh))             {                 w = nWidth;                 h = (w * sh) / sw;             }             else             {                 h = nHeight;                 w = (h * sw) / sh;             }               return new Size(Convert.ToInt32(w), Convert.ToInt32(h));         }         #endregion           #region 生成缩略图           #region 生成缩略图，不加水印         /// <summary>         /// 生成缩略图，不加水印         /// </summary>         /// <param name="filename">源文件</param>         /// <param name="nWidth">缩略图宽度</param>         /// <param name="nHeight">缩略图高度</param>         /// <param name="destfile">缩略图保存位置</param>         public void CreateSmallPhoto(string filename, int nWidth, int nHeight, string destfile)         {             Image img = Image.FromFile(filename);             ImageFormat thisFormat = img.RawFormat;               Size CutSize = CutRegion(nWidth, nHeight, img);             Bitmap outBmp = new Bitmap(nWidth, nHeight);             Graphics g = Graphics.FromImage(outBmp);               // 设置画布的描绘质量             g.CompositingQuality = CompositingQuality.HighQuality;             g.SmoothingMode = SmoothingMode.HighQuality;             g.InterpolationMode = InterpolationMode.HighQualityBicubic;               int nStartX = (img.Width - CutSize.Width) / 2;             int nStartY = (img.Height - CutSize.Height) / 2;               g.DrawImage(img, new Rectangle(0, 0, nWidth, nHeight),                 nStartX, nStartY, CutSize.Width, CutSize.Height, GraphicsUnit.Pixel);             g.Dispose();               //if (thisFormat.Equals(ImageFormat.Gif))             //{             //    Response.ContentType = "image/gif";             //}             //else             //{             //    Response.ContentType = "image/jpeg";             //}               // 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] = 100;               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 x = 0; x < arrayICI.Length; x++)             {                 if (arrayICI[x].FormatDescription.Equals("JPEG"))                 {                     jpegICI = arrayICI[x];//设置JPEG编码                     break;                 }             }               if (jpegICI != null)             {                 //outBmp.Save(Response.OutputStream, jpegICI, encoderParams);                 outBmp.Save(destfile, jpegICI, encoderParams);             }             else             {                 //outBmp.Save(Response.OutputStream, thisFormat);                 outBmp.Save(destfile, thisFormat);             }               img.Dispose();             outBmp.Dispose();         }         #endregion           #region 生成缩略图，加水印         public void CreateSmallPhoto(string filename, int nWidth, int nHeight, string destfile, string sy, int nType)         {             if (nType == 0)                 CreateSmallPhoto(filename, nWidth, nHeight, destfile, sy, "");             else                 CreateSmallPhoto(filename, nWidth, nHeight, destfile, "", sy);         }         #endregion           #region 生成缩略图         /// <summary>         /// 生成缩略图         /// </summary>         /// <param name="filename">源文件</param>         /// <param name="nWidth">缩略图宽度</param>         /// <param name="nHeight">缩略图高度</param>         /// <param name="destfile">缩略图保存位置</param>         /// <param name="png">图片水印</param>         /// <param name="text">文本水印</param>         public void CreateSmallPhoto(string filename, int nWidth, int nHeight, string destfile, string png, string text)         {             Image img = Image.FromFile(filename);             ImageFormat thisFormat = img.RawFormat;               Size CutSize = CutRegion(nWidth, nHeight, img);             Bitmap outBmp = new Bitmap(nWidth, nHeight);             Graphics g = Graphics.FromImage(outBmp);             g.Clear(Color.White);               // 设置画布的描绘质量             g.CompositingQuality = CompositingQuality.HighQuality;             g.SmoothingMode = SmoothingMode.HighQuality;             g.InterpolationMode = InterpolationMode.HighQualityBicubic;               int nStartX = (img.Width - CutSize.Width) / 2;             int nStartY = (img.Height - CutSize.Height) / 2;               g.DrawImage(img, new Rectangle(0, 0, nWidth, nHeight),                 nStartX, nStartY, CutSize.Width, CutSize.Height, GraphicsUnit.Pixel);             g.Dispose();               // 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] = 100;               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 x = 0; x < arrayICI.Length; x++)             {                 if (arrayICI[x].FormatDescription.Equals("JPEG"))                 {                     jpegICI = arrayICI[x];//设置JPEG编码                     break;                 }             }               if (jpegICI != null)             {                 outBmp.Save(destfile, jpegICI, encoderParams);             }             else             {                 outBmp.Save(destfile, thisFormat);             }               img.Dispose();             outBmp.Dispose();               if (!string.IsNullOrEmpty(png))                 AttachPng(png, destfile);               if (!string.IsNullOrEmpty(text))                 AttachText(text, destfile);         }             public void CreateSmallPhoto(string filename, int nWidth, int nHeight, string destfile, string png, string text, CutMode cMode)         {             Image img = Image.FromFile(filename);               if (nWidth <= 0)                 nWidth = img.Width;             if (nHeight <= 0)                 nHeight = img.Height;               int towidth = nWidth;             int toheight = nHeight;               switch (cMode)             {                 case CutMode.CutWH://指定高宽缩放（可能变形）                                   break;                 case CutMode.CutW://指定宽，高按比例                                       toheight = img.Height * nWidth / img.Width;                     break;                 case CutMode.CutH://指定高，宽按比例                     towidth = img.Width * nHeight / img.Height;                     break;                 case CutMode.CutNo: //缩放不剪裁                     int maxSize = (nWidth >= nHeight ? nWidth : nHeight);                     if (img.Width >= img.Height)                     {                         towidth = maxSize;                         toheight = img.Height * maxSize / img.Width;                     }                     else                     {                         toheight = maxSize;                         towidth = img.Width * maxSize / img.Height;                     }                     break;                 default:                     break;             }             nWidth = towidth;             nHeight = toheight;               ImageFormat thisFormat = img.RawFormat;               Size CutSize = new Size(nWidth, nHeight);             if (cMode != CutMode.CutNo)                 CutSize = CutRegion(nWidth, nHeight, img);               Bitmap outBmp = new Bitmap(CutSize.Width, CutSize.Height);               Graphics g = Graphics.FromImage(outBmp);             g.Clear(Color.White);               // 设置画布的描绘质量             g.CompositingQuality = CompositingQuality.HighQuality;             g.SmoothingMode = SmoothingMode.HighQuality;             g.InterpolationMode = InterpolationMode.HighQualityBicubic;               int nStartX = (img.Width - CutSize.Width) / 2;             int nStartY = (img.Height - CutSize.Height) / 2;               //int x1 = (outBmp.Width - nWidth) / 2;             //int y1 = (outBmp.Height - nHeight) / 2;               if (cMode != CutMode.CutNo)                 g.DrawImage(img, new Rectangle(0, 0, nWidth, nHeight),                     nStartX, nStartY, CutSize.Width, CutSize.Height, GraphicsUnit.Pixel);             else                 g.DrawImage(img, new Rectangle(0, 0, nWidth, nHeight),                 0, 0, img.Width, img.Height, GraphicsUnit.Pixel);             g.Dispose();               // 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] = 100;               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 x = 0; x < arrayICI.Length; x++)             {                 if (arrayICI[x].FormatDescription.Equals("JPEG"))                 {                     jpegICI = arrayICI[x];//设置JPEG编码                     break;                 }             }               if (jpegICI != null)             {                 outBmp.Save(destfile, jpegICI, encoderParams);             }             else             {                 outBmp.Save(destfile, thisFormat);             }               img.Dispose();             outBmp.Dispose();               if (!string.IsNullOrEmpty(png))                 AttachPng(png, destfile);               if (!string.IsNullOrEmpty(text))                 AttachText(text, destfile);         }         #endregion           #endregion           #region 添加文字水印         public void AttachText(string text, string file)         {             if (string.IsNullOrEmpty(text))                 return;               if (!System.IO.File.Exists(file))                 return;               System.IO.FileInfo oFile = new System.IO.FileInfo(file);             string strTempFile = System.IO.Path.Combine(oFile.DirectoryName, Guid.NewGuid().ToString() + oFile.Extension);             oFile.CopyTo(strTempFile);               Image img = Image.FromFile(strTempFile);             ImageFormat thisFormat = img.RawFormat;               int nHeight = img.Height;             int nWidth = img.Width;               Bitmap outBmp = new Bitmap(nWidth, nHeight);             Graphics g = Graphics.FromImage(outBmp);             g.Clear(Color.White);               // 设置画布的描绘质量             g.CompositingQuality = CompositingQuality.HighQuality;             g.SmoothingMode = SmoothingMode.HighQuality;             g.InterpolationMode = InterpolationMode.HighQualityBicubic;               g.DrawImage(img, new Rectangle(0, 0, nWidth, nHeight),                 0, 0, nWidth, nHeight, GraphicsUnit.Pixel);               int[] sizes = new int[] { 16, 14, 12, 10, 8, 6, 4 };               Font crFont = null;             SizeF crSize = new SizeF();               //通过循环这个数组，来选用不同的字体大小             //如果它的大小小于图像的宽度，就选用这个大小的字体             for (int i = 0; i < 7; i++)             {                 //设置字体，这里是用arial，黑体                 crFont = new Font("arial", sizes[i], FontStyle.Bold);                 //Measure the Copyright string in this Font                 crSize = g.MeasureString(text, crFont);                   if ((ushort)crSize.Width < (ushort)nWidth)                     break;             }               //因为图片的高度可能不尽相同, 所以定义了             //从图片底部算起预留了5%的空间             int yPixlesFromBottom = (int)(nHeight * .08);               //现在使用版权信息字符串的高度来确定要绘制的图像的字符串的y坐标               float yPosFromBottom = ((nHeight - yPixlesFromBottom) - (crSize.Height / 2));               //计算x坐标             float xCenterOfImg = (nWidth / 2);               //把文本布局设置为居中             StringFormat StrFormat = new StringFormat();             StrFormat.Alignment = StringAlignment.Center;               //通过Brush来设置黑色半透明             SolidBrush semiTransBrush2 = new SolidBrush(Color.FromArgb(153, 0, 0, 0));               //绘制版权字符串             g.DrawString(text,                 //版权字符串文本                 crFont,                                   //字体                 semiTransBrush2,                           //Brush                 new PointF(xCenterOfImg + 1, yPosFromBottom + 1),  //位置                 StrFormat);               //设置成白色半透明             SolidBrush semiTransBrush = new SolidBrush(Color.FromArgb(153, 255, 255, 255));               //第二次绘制版权字符串来创建阴影效果             //记住移动文本的位置1像素             g.DrawString(text,                 //版权文本                 crFont,                                   //字体                 semiTransBrush,                           //Brush                 new PointF(xCenterOfImg, yPosFromBottom),  //位置                 StrFormat);               g.Dispose();               // 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] = 100;               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 x = 0; x < arrayICI.Length; x++)             {                 if (arrayICI[x].FormatDescription.Equals("JPEG"))                 {                     jpegICI = arrayICI[x];//设置JPEG编码                     break;                 }             }               if (jpegICI != null)             {                 outBmp.Save(file, jpegICI, encoderParams);             }             else             {                 outBmp.Save(file, thisFormat);             }               img.Dispose();             outBmp.Dispose();               System.IO.File.Delete(strTempFile);         }         #endregion           #region 添加图片水印         ///<summary>         /// 添加图片水印         /// </summary>         /// <param name="png">水印图片</param>         /// <param name="file">原文件</param>         /// <param name="position">水印图片的位置 0居中、1左上角、2右上角、3左下角、4右下角</param>         public void AttachPng(string png, string file)         {             if (string.IsNullOrEmpty(png))                 return;               if (!System.IO.File.Exists(png))                 return;               if (!System.IO.File.Exists(file))                 return;               System.IO.FileInfo oFile = new System.IO.FileInfo(file);             string strTempFile = System.IO.Path.Combine(oFile.DirectoryName, Guid.NewGuid().ToString() + oFile.Extension);             oFile.CopyTo(strTempFile);               Image img = Image.FromFile(strTempFile);             ImageFormat thisFormat = img.RawFormat;             int nHeight = img.Height;             int nWidth = img.Width;               Bitmap outBmp = new Bitmap(nWidth, nHeight);             Graphics g = Graphics.FromImage(outBmp);               // 设置画布的描绘质量             g.CompositingQuality = CompositingQuality.HighQuality;             g.SmoothingMode = SmoothingMode.HighQuality;             g.InterpolationMode = InterpolationMode.HighQualityBicubic;               g.DrawImage(img, new Rectangle(0, 0, nWidth, nHeight),                 0, 0, nWidth, nHeight, GraphicsUnit.Pixel);               img.Dispose();               img = Image.FromFile(png);               //Bitmap bmpPng = new Bitmap(img);               //ImageAttributes imageAttr = new ImageAttributes();             //Color bg = Color.Green;             //imageAttr.SetColorKey(bg, bg);               Size pngSize = NewSize(nWidth, nHeight, img);             int nx = 0;             int ny = 0;             int padding = 10;             if (SetPositionWater == 0)             {                 nx = (nWidth - pngSize.Width) / 2;                 ny = (nHeight - pngSize.Height) / 2;             }             else if (SetPositionWater == 1)             {                 nx = padding;                 ny = padding;             }             else if (SetPositionWater == 2)             {                 nx = (nWidth - pngSize.Width) - padding;                 ny = padding;             }             else if (SetPositionWater == 3)             {                 nx = padding;                 ny = (nHeight - pngSize.Height) - padding;             }             else             {                 nx = (nWidth - pngSize.Width) - padding;                 ny = (nHeight - pngSize.Height) - padding;             }             g.DrawImage(img, new Rectangle(nx, ny, pngSize.Width, pngSize.Height),                 0, 0, img.Width, img.Height, GraphicsUnit.Pixel);               g.Dispose();               // 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] = 100;               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 x = 0; x < arrayICI.Length; x++)             {                 if (arrayICI[x].FormatDescription.Equals("JPEG"))                 {                     jpegICI = arrayICI[x];//设置JPEG编码                     break;                 }             }               if (jpegICI != null)             {                 outBmp.Save(file, jpegICI, encoderParams);             }             else             {                 outBmp.Save(file, thisFormat);             }               img.Dispose();             outBmp.Dispose();               System.IO.File.Delete(strTempFile);         }         #endregion           #region 得到指定mimeType的ImageCodecInfo         /// <summary>         /// 保存JPG时用         /// </summary>         /// <param name="mimeType"> </param>         /// <returns>得到指定mimeType的ImageCodecInfo </returns>         private ImageCodecInfo GetCodecInfo(string mimeType)         {             ImageCodecInfo[] CodecInfo = ImageCodecInfo.GetImageEncoders();             foreach (ImageCodecInfo ici in CodecInfo)             {                 if (ici.MimeType == mimeType) return ici;             }             return null;         }         #endregion           #region 保存为JPEG格式，支持压缩质量选项         /// <summary>         /// 保存为JPEG格式，支持压缩质量选项         /// </summary>         /// <param name="SourceFile"></param>         /// <param name="FileName"></param>         /// <param name="Qty"></param>         /// <returns></returns>         public bool KiSaveAsJPEG(string SourceFile, string FileName, int Qty)         {             Bitmap bmp = new Bitmap(SourceFile);               try             {                 EncoderParameter p;                 EncoderParameters ps;                   ps = new EncoderParameters(1);                   p = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, Qty);                 ps.Param[0] = p;                   bmp.Save(FileName, GetCodecInfo("image/jpeg"), ps);                   bmp.Dispose();                   return true;             }             catch             {                 bmp.Dispose();                 return false;             }           }         #endregion           #region 将图片压缩到指定大小         /// <summary>         /// 将图片压缩到指定大小         /// </summary>         /// <param name="FileName">待压缩图片</param>         /// <param name="size">期望压缩后的尺寸</param>         public void CompressPhoto(string FileName, int size)         {             if (!System.IO.File.Exists(FileName))                 return;               int nCount = 0;             System.IO.FileInfo oFile = new System.IO.FileInfo(FileName);             long nLen = oFile.Length;             while (nLen > size * 1024 && nCount < 10)             {                 string dir = oFile.Directory.FullName;                 string TempFile = System.IO.Path.Combine(dir, Guid.NewGuid().ToString() + "." + oFile.Extension);                 oFile.CopyTo(TempFile, true);                   KiSaveAsJPEG(TempFile, FileName, 70);                   try                 {                     System.IO.File.Delete(TempFile);                 }                 catch { }                   nCount++;                   oFile = new System.IO.FileInfo(FileName);                 nLen = oFile.Length;             }         }         #endregion           #endregion             #region common method           /// <summary>         /// 图片上传错误编码         /// </summary>         /// <param name="code"></param>         /// <returns></returns>         private string GetCodeMessage(int code)         {             var dic = new Dictionary<int, string>(){         {0,"系统配置错误"},         {1,"上传图片成功"},         {2,string.Format( "对不起，上传格式错误！请上传{0}格式图片",SetAllowFormat)},         {3,string.Format("超过文件上传大小,不得超过{0}M",SetAllowSize)},         {4,"未上传文件"},         {5,""},         {6,"缩略图长度和宽度配置错误"},         {7,"检测图片宽度限制"}          };             return dic[code];         }         private void TryError(ResponseMessage rm, int code)         {             rm.IsError = true;             rm.Message = GetCodeMessage(code);         }         private void TryError(ResponseMessage rm, string message)         {             rm.IsError = true;             rm.Message = message;         }         #endregion           #region models         public enum CutMode         {             /// <summary>             /// 根据高宽剪切             /// </summary>             CutWH = 1,             /// <summary>             /// 根据宽剪切             /// </summary>             CutW = 2,             /// <summary>             /// 根据高剪切             /// </summary>             CutH = 3,             /// <summary>             /// 缩放不剪裁             /// </summary>             CutNo = 4         }         public class ResponseMessage         {             /// <summary>             /// 是否遇到错误             /// </summary>             public bool IsError { get; set; }             /// <summary>             /// web路径             /// </summary>             public string WebPath { get; set; }             /// <summary>             /// 文件物理路径             /// </summary>             public string filePath { get; set; }             /// <summary>             /// 反回消息             /// </summary>             public string Message { get; set; }             /// <summary>             /// 文件大小             /// </summary>             public double Size { get; set; }             /// <summary>             /// 图片名             /// </summary>             public string FileName { get; set; }             /// <summary>             /// 图片目录             /// </summary>             public string Directory             {                 get                 {                     if (WebPath == null) return null;                     return WebPath.Replace(FileName, "");                 }             }             /// <summary>             /// 缩略图路径             /// </summary>             public string SmallPath(int index)             {                 return string.Format("{0}{1}_{2}{3}", Directory, Path.GetFileNameWithoutExtension(FileName), index, Path.GetExtension(FileName));             }         }         #endregion     }   }