给图片添加水印代码,Asp.NET代码库,德仔网

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【Asp.NET】给图片添加水印
作者:朝贵 / 发布于2016/7/28/ 549
using System;  
using System.Data;  
using System.Configuration;  
using System.Web;  
using System.Web.Security;  
using System.Web.UI;  
using System.Web.UI.WebControls;  
using System.Web.UI.WebControls.WebParts;  
using System.Web.UI.HtmlControls;  
using System.Drawing;  
using System.IO;  
using System.Drawing.Imaging;  
  
/// <summary>  
///ImgWater 的摘要说明  
/// </summary>  
public class ImgWater  
{  
    public ImgWater()  
    {  
        //  
        //TODO: 在此处添加构造函数逻辑  
        //  
    }  
  
      
    /// <summary>  
    /// 图片水印  
    /// </summary>  
    /// <param name="ImgFile">原图文件地址</param>  
    /// <param name="WaterImg">水印图片地址</param>  
    /// <param name="sImgPath">水印图片保存地址</param>  
    /// <param name="Alpha">水印透明度设置</param>  
    /// <param name="iScale">水印图片在原图上的显示比例</param>  
    /// <param name="intDistance">水印图片在原图上的边距确定,以图片的右边和下边为准,当设定的边距超过一定大小后参数会自动失效</param>  
    public bool zzsImgWater(  
         string ImgFile  
        , string WaterImg  
        , string sImgPath  
        , float Alpha  
        , float iScale  
        , int intDistance  
        )  
     {  
        try  
        {  
  
            //装载图片  
  
  
            FileStream fs = new FileStream(ImgFile, FileMode.Open);  
            BinaryReader br = new BinaryReader(fs);  
            byte[] bytes = br.ReadBytes((int)fs.Length);  
            br.Close();  
            fs.Close();  
            MemoryStream ms = new MemoryStream(bytes);  
  
            System.Drawing.Image imgPhoto = System.Drawing.Image.FromStream(ms);  
  
  
  
            //System.Drawing.Image imgPhoto = System.Drawing.Image.FromFile(ImgFile);  
  
  
  
            int imgPhotoWidth = imgPhoto.Width;  
            int imgPhotoHeight = imgPhoto.Height;  
  
            System.Drawing.Image imgWatermark = new Bitmap(WaterImg);  
            int imgWatermarkWidth = imgWatermark.Width;  
            int imgWatermarkHeight = imgWatermark.Height;  
  
  
            //计算水印图片尺寸  
  
            decimal aScale = Convert.ToDecimal(iScale);  
            decimal pScale = 0.05M;  
            decimal MinScale = aScale - pScale;  
            decimal MaxScale = aScale + pScale;  
  
            int imgWatermarkWidthNew = imgWatermarkWidth;  
            int imgWatermarkHeightNew = imgWatermarkHeight;  
  
            if (imgPhotoWidth >= imgWatermarkWidth && imgPhotoHeight >= imgWatermarkHeight && imgPhotoWidth >= imgPhotoHeight)  
                if (imgWatermarkWidth > imgWatermarkHeight)  
  
                    if ((MinScale <= Math.Round((Convert.ToDecimal(imgWatermarkWidth) / Convert.ToDecimal(imgPhotoWidth)), 7)) && (Math.Round((Convert.ToDecimal(imgWatermarkWidth) / Convert.ToDecimal(imgPhotoWidth)), 7) <= MaxScale))  
                     {  
  
                    }  
                    else  
                     {  
                        imgWatermarkWidthNew = Convert.ToInt32(imgPhotoWidth * aScale);  
                        imgWatermarkHeightNew = Convert.ToInt32((imgPhotoWidth * aScale / imgWatermarkWidth) * imgWatermarkHeight);  
                    }  
                else  
                    if ((MinScale <= Math.Round((Convert.ToDecimal(imgWatermarkHeight) / Convert.ToDecimal(imgPhotoHeight)), 7)) && (Math.Round((Convert.ToDecimal(imgWatermarkHeight) / Convert.ToDecimal(imgPhotoHeight)), 7) <= MaxScale))  
                    {  
  
                    }  
                    else  
                     {  
                        imgWatermarkHeightNew = Convert.ToInt32(imgPhotoHeight * aScale);  
                        imgWatermarkWidthNew = Convert.ToInt32((imgPhotoHeight * aScale / imgWatermarkHeight) * imgWatermarkWidth);  
                    }  
            if (imgWatermarkWidth >= imgPhotoWidth && imgWatermarkHeight >= imgPhotoHeight && imgWatermarkWidth >= imgWatermarkHeight)  
             {  
                imgWatermarkWidthNew = Convert.ToInt32(imgPhotoWidth * aScale);  
                imgWatermarkHeightNew = Convert.ToInt32(((imgPhotoWidth * aScale) / imgWatermarkWidth) * imgWatermarkHeight);  
            }  
  
            if (imgWatermarkWidth >= imgPhotoWidth && imgWatermarkHeight <= imgPhotoHeight && imgPhotoWidth >= imgPhotoHeight)  
             {  
                imgWatermarkWidthNew = Convert.ToInt32(imgPhotoWidth * aScale);  
                imgWatermarkHeightNew = Convert.ToInt32(((imgPhotoWidth * aScale) / imgWatermarkWidth) * imgWatermarkHeight);  
            }  
  
            if (imgWatermarkWidth <= imgPhotoWidth && imgWatermarkHeight >= imgPhotoHeight && imgPhotoWidth >= imgPhotoHeight)  
             {  
                imgWatermarkHeightNew = Convert.ToInt32(imgPhotoHeight * aScale);  
                imgWatermarkWidthNew = Convert.ToInt32(((imgPhotoHeight * aScale) / imgWatermarkHeight) * imgWatermarkWidth);  
            }  
  
            if (imgPhotoWidth >= imgWatermarkWidth && imgPhotoHeight >= imgWatermarkHeight && imgPhotoWidth <= imgPhotoHeight)  
                if (imgWatermarkWidth > imgWatermarkHeight)  
                    if ((MinScale <= Math.Round((Convert.ToDecimal(imgWatermarkWidth) / Convert.ToDecimal(imgPhotoWidth)), 7)) && (Math.Round((Convert.ToDecimal(imgWatermarkWidth) / Convert.ToDecimal(imgPhotoWidth)), 7) <= MaxScale))  
                     {  
  
                    }  
                    else  
                     {  
                        imgWatermarkWidthNew = Convert.ToInt32(imgPhotoWidth * aScale);  
                        imgWatermarkHeightNew = Convert.ToInt32(((imgPhotoWidth * aScale) / imgWatermarkWidth) * imgWatermarkHeight);  
                    }  
                else  
                    if ((MinScale <= Math.Round((Convert.ToDecimal(imgWatermarkHeight) / Convert.ToDecimal(imgPhotoHeight)), 7)) && (Math.Round((Convert.ToDecimal(imgWatermarkHeight) / Convert.ToDecimal(imgPhotoHeight)), 7) <= MaxScale))  
                     {  
  
                    }  
                    else  
                     {  
                        imgWatermarkHeightNew = Convert.ToInt32(imgPhotoHeight * aScale);  
                        imgWatermarkWidthNew = Convert.ToInt32(((imgPhotoHeight * aScale) / imgWatermarkHeight) * imgWatermarkWidth);  
                    }  
  
            if (imgWatermarkWidth >= imgPhotoWidth && imgWatermarkHeight >= imgPhotoHeight && imgWatermarkWidth <= imgWatermarkHeight)  
             {  
                imgWatermarkHeightNew = Convert.ToInt32(imgPhotoHeight * aScale);  
                imgWatermarkWidthNew = Convert.ToInt32(((imgPhotoHeight * aScale) / imgWatermarkHeight) * imgWatermarkWidth);  
            }  
  
            if (imgWatermarkWidth >= imgPhotoWidth && imgWatermarkHeight <= imgPhotoHeight && imgPhotoWidth <= imgPhotoHeight)  
             {  
                imgWatermarkWidthNew = Convert.ToInt32(imgPhotoWidth * aScale);  
                imgWatermarkHeightNew = Convert.ToInt32(((imgPhotoWidth * aScale) / imgWatermarkWidth) * imgWatermarkHeight);  
            }  
  
            if (imgWatermarkWidth <= imgPhotoWidth && imgWatermarkHeight >= imgPhotoHeight && imgPhotoWidth <= imgPhotoHeight)  
             {  
                imgWatermarkHeightNew = Convert.ToInt32(imgPhotoHeight * aScale);  
                imgWatermarkWidthNew = Convert.ToInt32(((imgPhotoHeight * aScale) / imgWatermarkHeight) * imgWatermarkWidth);  
            }  
  
  
            //将原图画出来  
  
            Bitmap bmPhoto = new Bitmap(imgPhotoWidth, imgPhotoHeight, System.Drawing.Imaging.PixelFormat.Format24bppRgb);  
            bmPhoto.SetResolution(72, 72);  
            Graphics gbmPhoto = Graphics.FromImage(bmPhoto);  
  
            gbmPhoto.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;  
            gbmPhoto.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;  
            gbmPhoto.Clear(Color.White);  
            gbmPhoto.DrawImage(  
                  imgPhoto  
                , new Rectangle(0, 0, imgPhotoWidth, imgPhotoHeight)  
                , 0  
                , 0  
                , imgPhotoWidth  
                , imgPhotoHeight  
                , GraphicsUnit.Pixel  
                );  
  
  
  
            Bitmap bmWatermark = new Bitmap(bmPhoto);  
            bmWatermark.SetResolution(imgPhoto.HorizontalResolution, imgPhoto.VerticalResolution);  
  
            Graphics gWatermark = Graphics.FromImage(bmWatermark);  
  
            //指定高质量显示水印图片质量  
            gWatermark.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;  
            gWatermark.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;  
  
  
             ImageAttributes imageAttributes = new  ImageAttributes();  
  
            //设置两种颜色,达到合成效果  
  
            ColorMap colorMap = new ColorMap();  
  
            colorMap.OldColor = Color.FromArgb(255, 0, 255, 0);  
            colorMap.NewColor = Color.FromArgb(0, 0, 0, 0);  
  
            ColorMap[] remapTable = { colorMap };  
  
            imageAttributes.SetRemapTable(remapTable, System.Drawing.Imaging.ColorAdjustType.Bitmap);  
  
                    //用矩阵设置水印图片透明度  
            float[][] colorMatrixElements = {   
               new float[]  {1.0f,  0.0f,  0.0f,  0.0f, 0.0f},  
               new float[]  {0.0f,  1.0f,  0.0f,  0.0f, 0.0f},  
               new float[]  {0.0f,  0.0f,  1.0f,  0.0f, 0.0f},  
               new float[]  {0.0f,  0.0f,  0.0f,  Alpha, 0.0f},  
               new float[]  {0.0f,  0.0f,  0.0f,  0.0f, 1.0f}  
            };  
  
  
            System.Drawing.Imaging.ColorMatrix wmColorMatrix = new System.Drawing.Imaging.ColorMatrix(colorMatrixElements);  
  
            imageAttributes.SetColorMatrix(wmColorMatrix, System.Drawing.Imaging.ColorMatrixFlag.Default, System.Drawing.Imaging.ColorAdjustType.Bitmap);  
  
            //确定水印边距  
            int xPos = imgPhotoWidth - imgWatermarkWidthNew;  
            int yPos = imgPhotoHeight - imgWatermarkHeightNew;  
            int xPosOfWm = 0;  
            int yPosOfWm = 0;  
  
            if (xPos > intDistance)  
                xPosOfWm = xPos - intDistance;  
            else  
                xPosOfWm = xPos;  
  
            if (yPos > intDistance)  
                yPosOfWm = yPos - intDistance;  
            else  
                yPosOfWm = yPos;  
  
            gWatermark.DrawImage(  
                  imgWatermark  
                , new Rectangle(xPosOfWm, yPosOfWm, imgWatermarkWidthNew, imgWatermarkHeightNew)  
                , 0  
                , 0  
                , imgWatermarkWidth  
                , imgWatermarkHeight  
                , GraphicsUnit.Pixel  
                , imageAttributes  
                );  
  
            imgPhoto = bmWatermark;  
  
  
  
            //以jpg格式保存图片  
            imgPhoto.Save(sImgPath, System.Drawing.Imaging.ImageFormat.Jpeg);  
  
            //销毁对象  
            gbmPhoto.Dispose();  
            gWatermark.Dispose();  
  
            imgPhoto.Dispose();  
            imgWatermark.Dispose();  
  
            return true;  
  
        }  
        catch  
        {  
            return false ;  
        }  
    }  
  
  
    /**//// <summary>  
    /// 文字水印  
    /// </summary>  
    /// <param name="ImgFile">原图文件地址</param>  
    /// <param name="TextFont">水印文字</param>  
    /// <param name="sImgPath">文字水印图片保存地址</param>  
    /// <param name="hScale">高度位置</param>  
    /// <param name="widthFont">文字块在图片中所占宽度比例</param>  
    /// <param name="Alpha">文字透明度 其数值的范围在0到255</param>  
  
    public bool zzsTextWater(  
          string ImgFile  
        , string TextFont  
        , string sImgPath  
        , float hScale  
        , float widthFont  
        , int Alpha  
        )  
       {  
        try  
        {  
  
            FileStream fs = new FileStream(ImgFile, FileMode.Open);  
            BinaryReader br = new BinaryReader(fs);  
            byte[] bytes = br.ReadBytes((int)fs.Length);  
            br.Close();  
            fs.Close();  
            MemoryStream ms = new MemoryStream(bytes);  
  
            System.Drawing.Image imgPhoto = System.Drawing.Image.FromStream(ms);  
  
  
  
            //System.Drawing.Image imgPhoto = System.Drawing.Image.FromFile(ImgFile);  
  
            int imgPhotoWidth = imgPhoto.Width;  
            int imgPhotoHeight = imgPhoto.Height;  
  
            Bitmap bmPhoto = new Bitmap(imgPhotoWidth, imgPhotoHeight, System.Drawing.Imaging.PixelFormat.Format24bppRgb);  
            bmPhoto.SetResolution(72, 72);  
            Graphics gbmPhoto = Graphics.FromImage(bmPhoto);  
  
            gbmPhoto.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;  
            gbmPhoto.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;  
  
            gbmPhoto.DrawImage(  
                  imgPhoto  
                , new Rectangle(0, 0, imgPhotoWidth, imgPhotoHeight)  
                , 0  
                , 0  
                , imgPhotoWidth  
                , imgPhotoHeight  
                , GraphicsUnit.Pixel  
                );  
  
            //建立字体大小的数组,循环找出适合图片的水印字体  
  
            //int[] sizes = new int[] { 1000, 800, 700, 650, 600, 560, 540, 500, 450, 400, 380, 360, 340, 320, 300, 280, 260, 240, 220, 200, 180, 160, 140, 120, 100, 80, 72, 64, 48, 32, 28, 26, 24, 20, 28, 16, 14, 12, 10, 8, 6, 4, 2 };  
            int[] sizes = new int[] {  28, 26, 24, 20, 16, 14, 12 };  
              
            System.Drawing.Font crFont = null;  
            System.Drawing.SizeF crSize = new SizeF();  
            for (int i = 0; i < 7; i++)  
            {  
                crFont = new Font("微软雅黑", sizes[i], FontStyle.Bold);  
                crSize = gbmPhoto.MeasureString(TextFont, crFont);  
  
                if ((ushort)crSize.Width < (ushort)imgPhotoWidth * widthFont)  
                    break;  
            }  
  
            //设置水印字体的位置  
            //int yPixlesFromBottom = (int)(imgPhotoHeight * hScale);  
            //float yPosFromBottom = ((imgPhotoHeight - yPixlesFromBottom) - (crSize.Height / 2));  
            //float xCenterOfImg = (imgPhotoWidth * 1 / 2);  
            float yPosFromBottom = imgPhotoHeight *0.85f;  
            float xCenterOfImg = imgPhotoWidth * 0.8f;  
  
            //if (xCenterOfImg<crSize.Height)  
            //    xCenterOfImg = (imgPhotoWidth * (1 - (crSize.Height)/ imgPhotoWidth));  
  
            System.Drawing.StringFormat StrFormat = new System.Drawing.StringFormat();  
            StrFormat.Alignment = System.Drawing.StringAlignment.Center;  
  
            //  
            System.Drawing.SolidBrush semiTransBrush2 = new System.Drawing.SolidBrush(Color.FromArgb(Alpha, 0, 0, 0));  
  
            gbmPhoto.DrawString(  
                  TextFont  
                , crFont  
                , semiTransBrush2  
                , new System.Drawing.PointF(xCenterOfImg + 1, yPosFromBottom + 1)  
                , StrFormat  
                );  
  
            System.Drawing.SolidBrush semiTransBrush = new System.Drawing.SolidBrush(Color.FromArgb(Alpha, 255, 255, 255));  
  
            //gbmPhoto.FillRectangle(semiTransBrush2, new RectangleF(new PointF(xCenterOfImg - crSize.Width / 2, yPosFromBottom - 4), crSize));  
  
            gbmPhoto.DrawString(  
                  TextFont  
                , crFont  
                , semiTransBrush  
                , new System.Drawing.PointF(xCenterOfImg, yPosFromBottom)  
                , StrFormat  
                );  
  
            bmPhoto.Save(sImgPath, System.Drawing.Imaging.ImageFormat.Jpeg);  
  
            gbmPhoto.Dispose();  
            imgPhoto.Dispose();  
            bmPhoto.Dispose();  
            return true;  
        }  
        catch    
        {  
            return false;  
        }  
    }  
  
  
    /**//// <summary>  
    /// 文字和Logo图片水印  
    /// </summary>  
    /// <param name="ImgFile">原图文件地址</param>  
    /// <param name="WaterImg">水印图片地址</param>  
    /// <param name="TextFont">水印文字信息</param>  
    /// <param name="sImgPath">生存水印图片后的保存地址</param>  
    /// <param name="ImgAlpha">水印图片的透明度</param>  
    /// <param name="imgiScale">水印图片在原图上的显示比例</param>  
    /// <param name="intimgDistance">水印图片在原图上的边距确定,以图片的右边和下边为准,当设定的边距超过一定大小后参数会自动失效</param>  
    /// <param name="texthScale">水印文字高度位置,从图片底部开始计算，0－1</param>  
    /// <param name="textwidthFont">文字块在图片中所占宽度比例 0－1</param>  
    /// <param name="textAlpha">文字透明度 其数值的范围在0到255</param>  
    public void zzsImgTextWater(  
          string ImgFile  
        , string WaterImg  
        , string TextFont  
        , string sImgPath  
        , float ImgAlpha  
        , float imgiScale  
        , int intimgDistance  
        , float texthScale  
        , float textwidthFont  
        , int textAlpha  
        )  
       {  
        try  
        {  
  
            FileStream fs = new FileStream(ImgFile, FileMode.Open);  
            BinaryReader br = new BinaryReader(fs);  
            byte[] bytes = br.ReadBytes((int)fs.Length);  
            br.Close();  
            fs.Close();  
            MemoryStream ms = new MemoryStream(bytes);  
  
            System.Drawing.Image imgPhoto = System.Drawing.Image.FromStream(ms);  
  
  
  
            //System.Drawing.Image imgPhoto = System.Drawing.Image.FromFile(ImgFile);  
  
  
            int imgPhotoWidth = imgPhoto.Width;  
            int imgPhotoHeight = imgPhoto.Height;  
  
            Bitmap bmPhoto = new Bitmap(imgPhotoWidth, imgPhotoHeight, System.Drawing.Imaging.PixelFormat.Format24bppRgb);  
            bmPhoto.SetResolution(72, 72);  
            Graphics gbmPhoto = Graphics.FromImage(bmPhoto);  
  
            gbmPhoto.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;  
            gbmPhoto.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;  
  
            gbmPhoto.DrawImage(  
                  imgPhoto  
                , new Rectangle(0, 0, imgPhotoWidth, imgPhotoHeight)  
                , 0  
                , 0  
                , imgPhotoWidth  
                , imgPhotoHeight  
                , GraphicsUnit.Pixel  
                );  
  
  
            //建立字体大小的数组,循环找出适合图片的水印字体  
  
            int[] sizes = new int[]  { 1000, 800, 700, 650, 600, 560, 540, 500, 450, 400, 380, 360, 340, 320, 300, 280, 260, 240, 220, 200, 180, 160, 140, 120, 100, 80, 72, 64, 48, 32, 28, 26, 24, 20, 28, 16, 14, 12, 10, 8, 6, 4, 2 };  
            System.Drawing.Font crFont = null;  
            System.Drawing.SizeF crSize = new SizeF();  
            for (int i = 0; i < 43; i++)  
            {  
                crFont = new Font("arial", sizes[i], FontStyle.Bold);  
                crSize = gbmPhoto.MeasureString(TextFont, crFont);  
  
                if ((ushort)crSize.Width < (ushort)imgPhotoWidth * textwidthFont)  
                    break;  
            }  
  
            //设置水印字体的位置  
            int yPixlesFromBottom = (int)(imgPhotoHeight * texthScale);  
            float yPosFromBottom = ((imgPhotoHeight - yPixlesFromBottom) - (crSize.Height / 2));  
            float xCenterOfImg = (imgPhotoWidth * 1 / 2);  
  
            System.Drawing.StringFormat StrFormat = new System.Drawing.StringFormat();  
            StrFormat.Alignment = System.Drawing.StringAlignment.Center;  
  
            //  
            System.Drawing.SolidBrush semiTransBrush2 = new System.Drawing.SolidBrush(Color.FromArgb(textAlpha, 0, 0, 0));  
  
            gbmPhoto.DrawString(  
                  TextFont  
                , crFont  
                , semiTransBrush2  
                , new System.Drawing.PointF(xCenterOfImg + 1, yPosFromBottom + 1)  
                , StrFormat  
                );  
  
            System.Drawing.SolidBrush semiTransBrush = new System.Drawing.SolidBrush(Color.FromArgb(textAlpha, 255, 255, 255));  
  
            gbmPhoto.DrawString(  
                  TextFont  
                , crFont  
                , semiTransBrush  
                , new System.Drawing.PointF(xCenterOfImg, yPosFromBottom)  
                , StrFormat  
                );  
  
  
            System.Drawing.Image imgWatermark = new Bitmap(WaterImg);  
            int imgWatermarkWidth = imgWatermark.Width;  
            int imgWatermarkHeight = imgWatermark.Height;  
  
  
            //计算水印图片尺寸  
  
            decimal aScale = Convert.ToDecimal(imgiScale);  
            decimal pScale = 0.05M;  
            decimal MinScale = aScale - pScale;  
            decimal MaxScale = aScale + pScale;  
  
            int imgWatermarkWidthNew = imgWatermarkWidth;  
            int imgWatermarkHeightNew = imgWatermarkHeight;  
  
            if (imgPhotoWidth >= imgWatermarkWidth && imgPhotoHeight >= imgWatermarkHeight && imgPhotoWidth >= imgPhotoHeight)  
                if (imgWatermarkWidth > imgWatermarkHeight)  
  
                    if ((MinScale <= Math.Round((Convert.ToDecimal(imgWatermarkWidth) / Convert.ToDecimal(imgPhotoWidth)), 7)) && (Math.Round((Convert.ToDecimal(imgWatermarkWidth) / Convert.ToDecimal(imgPhotoWidth)), 7) <= MaxScale))  
                    {  
  
                    }  
                    else  
                    {  
                        imgWatermarkWidthNew = Convert.ToInt32(imgPhotoWidth * aScale);  
                        imgWatermarkHeightNew = Convert.ToInt32((imgPhotoWidth * aScale / imgWatermarkWidth) * imgWatermarkHeight);  
                    }  
                else  
                    if ((MinScale <= Math.Round((Convert.ToDecimal(imgWatermarkHeight) / Convert.ToDecimal(imgPhotoHeight)), 7)) && (Math.Round((Convert.ToDecimal(imgWatermarkHeight) / Convert.ToDecimal(imgPhotoHeight)), 7) <= MaxScale))  
                    {  
  
                    }  
                    else  
                    {  
                        imgWatermarkHeightNew = Convert.ToInt32(imgPhotoHeight * aScale);  
                        imgWatermarkWidthNew = Convert.ToInt32((imgPhotoHeight * aScale / imgWatermarkHeight) * imgWatermarkWidth);  
                    }  
            if (imgWatermarkWidth >= imgPhotoWidth && imgWatermarkHeight >= imgPhotoHeight && imgWatermarkWidth >= imgWatermarkHeight)  
            {  
                imgWatermarkWidthNew = Convert.ToInt32(imgPhotoWidth * aScale);  
                imgWatermarkHeightNew = Convert.ToInt32(((imgPhotoWidth * aScale) / imgWatermarkWidth) * imgWatermarkHeight);  
            }  
  
            if (imgWatermarkWidth >= imgPhotoWidth && imgWatermarkHeight <= imgPhotoHeight && imgPhotoWidth >= imgPhotoHeight)  
            {  
                imgWatermarkWidthNew = Convert.ToInt32(imgPhotoWidth * aScale);  
                imgWatermarkHeightNew = Convert.ToInt32(((imgPhotoWidth * aScale) / imgWatermarkWidth) * imgWatermarkHeight);  
            }  
  
            if (imgWatermarkWidth <= imgPhotoWidth && imgWatermarkHeight >= imgPhotoHeight && imgPhotoWidth >= imgPhotoHeight)  
            {  
                imgWatermarkHeightNew = Convert.ToInt32(imgPhotoHeight * aScale);  
                imgWatermarkWidthNew = Convert.ToInt32(((imgPhotoHeight * aScale) / imgWatermarkHeight) * imgWatermarkWidth);  
            }  
  
            if (imgPhotoWidth >= imgWatermarkWidth && imgPhotoHeight >= imgWatermarkHeight && imgPhotoWidth <= imgPhotoHeight)  
                if (imgWatermarkWidth > imgWatermarkHeight)  
                    if ((MinScale <= Math.Round((Convert.ToDecimal(imgWatermarkWidth) / Convert.ToDecimal(imgPhotoWidth)), 7)) && (Math.Round((Convert.ToDecimal(imgWatermarkWidth) / Convert.ToDecimal(imgPhotoWidth)), 7) <= MaxScale))  
                    {  
  
                    }  
                    else  
                    {  
                        imgWatermarkWidthNew = Convert.ToInt32(imgPhotoWidth * aScale);  
                        imgWatermarkHeightNew = Convert.ToInt32(((imgPhotoWidth * aScale) / imgWatermarkWidth) * imgWatermarkHeight);  
                    }  
                else  
                    if ((MinScale <= Math.Round((Convert.ToDecimal(imgWatermarkHeight) / Convert.ToDecimal(imgPhotoHeight)), 7)) && (Math.Round((Convert.ToDecimal(imgWatermarkHeight) / Convert.ToDecimal(imgPhotoHeight)), 7) <= MaxScale))  
                    {  
  
                    }  
                    else  
                    {  
                        imgWatermarkHeightNew = Convert.ToInt32(imgPhotoHeight * aScale);  
                        imgWatermarkWidthNew = Convert.ToInt32(((imgPhotoHeight * aScale) / imgWatermarkHeight) * imgWatermarkWidth);  
                    }  
  
            if (imgWatermarkWidth >= imgPhotoWidth && imgWatermarkHeight >= imgPhotoHeight && imgWatermarkWidth <= imgWatermarkHeight)  
            {  
                imgWatermarkHeightNew = Convert.ToInt32(imgPhotoHeight * aScale);  
                imgWatermarkWidthNew = Convert.ToInt32(((imgPhotoHeight * aScale) / imgWatermarkHeight) * imgWatermarkWidth);  
            }  
  
            if (imgWatermarkWidth >= imgPhotoWidth && imgWatermarkHeight <= imgPhotoHeight && imgPhotoWidth <= imgPhotoHeight)  
            {  
                imgWatermarkWidthNew = Convert.ToInt32(imgPhotoWidth * aScale);  
                imgWatermarkHeightNew = Convert.ToInt32(((imgPhotoWidth * aScale) / imgWatermarkWidth) * imgWatermarkHeight);  
            }  
  
            if (imgWatermarkWidth <= imgPhotoWidth && imgWatermarkHeight >= imgPhotoHeight && imgPhotoWidth <= imgPhotoHeight)  
            {  
                imgWatermarkHeightNew = Convert.ToInt32(imgPhotoHeight * aScale);  
                imgWatermarkWidthNew = Convert.ToInt32(((imgPhotoHeight * aScale) / imgWatermarkHeight) * imgWatermarkWidth);  
            }  
  
  
            //将原图画出来  
  
  
            Bitmap bmWatermark = new Bitmap(bmPhoto);  
            bmWatermark.SetResolution(imgPhoto.HorizontalResolution, imgPhoto.VerticalResolution);  
  
            Graphics gWatermark = Graphics.FromImage(bmWatermark);  
  
            //指定高质量显示水印图片质量  
            gWatermark.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;  
            gWatermark.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;  
  
  
            System.Drawing.Imaging.ImageAttributes imageAttributes = new System.Drawing.Imaging.ImageAttributes();  
  
            //设置两种颜色,达到合成效果  
  
            System.Drawing.Imaging.ColorMap colorMap = new System.Drawing.Imaging.ColorMap();  
            colorMap.OldColor = Color.FromArgb(255, 0, 255, 0);  
            colorMap.NewColor = Color.FromArgb(0, 0, 0, 0);  
  
            System.Drawing.Imaging.ColorMap[] remapTable =  { colorMap };  
  
            imageAttributes.SetRemapTable(remapTable, System.Drawing.Imaging.ColorAdjustType.Bitmap);  
  
            //用矩阵设置水印图片透明度  
            float[][] colorMatrixElements =  {   
               new float[]  {1.0f,  0.0f,  0.0f,  0.0f, 0.0f},  
               new float[]  {0.0f,  1.0f,  0.0f,  0.0f, 0.0f},  
               new float[]  {0.0f,  0.0f,  1.0f,  0.0f, 0.0f},  
               new float[]  {0.0f,  0.0f,  0.0f,  ImgAlpha, 0.0f},  
               new float[]  {0.0f,  0.0f,  0.0f,  0.0f, 1.0f}  
            };  
  
  
            System.Drawing.Imaging.ColorMatrix wmColorMatrix = new System.Drawing.Imaging.ColorMatrix(colorMatrixElements);  
  
            imageAttributes.SetColorMatrix(wmColorMatrix, System.Drawing.Imaging.ColorMatrixFlag.Default, System.Drawing.Imaging.ColorAdjustType.Bitmap);  
  
            //确定水印边距  
            int xPos = imgPhotoWidth - imgWatermarkWidthNew;  
            int yPos = imgPhotoHeight - imgWatermarkHeightNew;  
            int xPosOfWm = 0;  
            int yPosOfWm = 0;  
  
            if (xPos > intimgDistance)  
                xPosOfWm = xPos - intimgDistance;  
            else  
                xPosOfWm = xPos;  
  
            if (yPos > intimgDistance)  
                yPosOfWm = yPos - intimgDistance;  
            else  
                yPosOfWm = yPos;  
  
            gWatermark.DrawImage(  
                  imgWatermark  
                , new Rectangle(xPosOfWm, yPosOfWm, imgWatermarkWidthNew, imgWatermarkHeightNew)  
                , 0  
                , 0  
                , imgWatermarkWidth  
                , imgWatermarkHeight  
                , GraphicsUnit.Pixel  
                , imageAttributes  
                );  
  
            imgPhoto = bmWatermark;  
  
            //以jpg格式保存图片  
            imgPhoto.Save(sImgPath, System.Drawing.Imaging.ImageFormat.Jpeg);  
  
            //销毁对象  
            gbmPhoto.Dispose();  
            gWatermark.Dispose();  
            bmPhoto.Dispose();  
            imgPhoto.Dispose();  
            imgWatermark.Dispose();  
        }  
        catch    
        {  
        }  
    }  
  
    /**//// <summary>  
    /// 缩略图  
    /// </summary>  
    /// <param name="ImgFile">原图文件地址</param>  
    /// <param name="sImgPath">缩略图保存地址</param>  
    /// <param name="ResizeWidth">缩略图宽度</param>  
    /// <param name="ResizeHeight">缩略图高度</param>  
    /// <param name="BgColor">缩略图背景颜色,注意,背景颜色只能指定KnownColor中的值,如blue,red,green等</param>  
  
    public bool zzsResizeImg( string ImgFile , string sImgPath , int ResizeWidth , int ResizeHeight , string BgColor  )  
       {  
        try  
        {  
            FileStream fs = new FileStream(ImgFile, FileMode.Open);  
            BinaryReader br = new BinaryReader(fs);  
            byte[] bytes = br.ReadBytes((int)fs.Length);  
            br.Close();  
            fs.Close();  
            MemoryStream ms = new MemoryStream(bytes);  
  
            System.Drawing.Image imgPhoto = System.Drawing.Image.FromStream(ms);  
  
  
  
            //System.Drawing.Image imgPhoto = System.Drawing.Image.FromFile(ImgFile);  
  
  
            int imgPhotoWidth = imgPhoto.Width;  
            int imgPhotoHeight = imgPhoto.Height;  
            int startX = 0;  
            int StartY = 0;  
            int NewWidth = 0;  
            int NewHeight = 0;  
  
            if (imgPhotoWidth >= ResizeWidth && imgPhotoHeight >= ResizeHeight)  
            {  
                NewWidth = ResizeWidth;  
                NewHeight = Convert.ToInt32(imgPhotoHeight * Math.Round(Convert.ToDecimal(ResizeWidth) / Convert.ToDecimal(imgPhotoWidth), 10));  
                startX = 0;  
                StartY = (ResizeHeight - NewHeight) / 2;  
            }  
  
            if (ResizeWidth > imgPhotoWidth && ResizeHeight < imgPhotoHeight)  
            {  
                NewHeight = ResizeHeight;  
                NewWidth = Convert.ToInt32(imgPhotoWidth * Math.Round(Convert.ToDecimal(ResizeHeight) / Convert.ToDecimal(imgPhotoHeight), 10));  
                startX = (ResizeWidth - NewWidth) / 2;  
                StartY = 0;  
            }  
  
            if (ResizeWidth < imgPhotoWidth && ResizeHeight > imgPhotoHeight)  
            {  
                NewWidth = ResizeWidth;  
                NewHeight = Convert.ToInt32(imgPhotoHeight * Math.Round(Convert.ToDecimal(ResizeWidth) / Convert.ToDecimal(imgPhotoWidth), 10));  
                startX = 0;  
                StartY = (ResizeHeight - NewHeight) / 2;  
            }  
  
            if (imgPhotoWidth < ResizeWidth && imgPhotoHeight < ResizeHeight)  
            {  
                NewWidth = imgPhotoWidth;  
                NewHeight = imgPhotoHeight;  
                startX = (ResizeWidth - imgPhotoWidth) / 2;  
                StartY = (ResizeHeight - imgPhotoHeight) / 2;  
            }  
  
            //计算缩放图片尺寸  
  
  
  
            Bitmap bmPhoto = new Bitmap(ResizeWidth, ResizeHeight, System.Drawing.Imaging.PixelFormat.Format24bppRgb);  
            bmPhoto.SetResolution(72, 72);  
            Graphics gbmPhoto = Graphics.FromImage(bmPhoto);  
            gbmPhoto.Clear(Color.FromName(BgColor));  
            gbmPhoto.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;  
            gbmPhoto.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;  
  
            gbmPhoto.DrawImage(  
                  imgPhoto  
                , new Rectangle(startX, StartY, NewWidth, NewHeight)  
                , new Rectangle(0, 0, imgPhotoWidth, imgPhotoHeight)  
                , GraphicsUnit.Pixel  
                );  
            bmPhoto.Save(sImgPath, System.Drawing.Imaging.ImageFormat.Jpeg);  
            imgPhoto.Dispose();  
            gbmPhoto.Dispose();  
            bmPhoto.Dispose();  
            ms.Close();  
            return true;  
  
        }  
        catch   
        {  
            return false;  
        }  
    }  
  
    /**//// <summary>  
    /// 图片剪切  
    /// </summary>  
    /// <param name="ImgFile">原图文件地址</param>  
    /// <param name="sImgPath">缩略图保存地址</param>  
    /// <param name="PointX">剪切起始点 X坐标</param>  
    /// <param name="PointY">剪切起始点 Y坐标</param>  
    /// <param name="CutWidth">剪切宽度</param>  
    /// <param name="CutHeight">剪切高度</param>  
  
    public bool zzsCutImg(string ImgFile, string sImgPath, int PointX, int PointY, int CutWidth, int CutHeight)  
    {  
        FileStream fs = new FileStream(ImgFile, FileMode.Open);  
        BinaryReader br = new BinaryReader(fs);  
        try  
        {  
            byte[] bytes = br.ReadBytes((int)fs.Length);  
            br.Close();  
            fs.Close();  
            MemoryStream ms = new MemoryStream(bytes);  
              
            System.Drawing.Image imgPhoto = System.Drawing.Image.FromStream(ms);  
  
            //System.Drawing.Image imgPhoto = System.Drawing.Image.FromFile(ImgFile);  
            //此处只能用filestream，用 System.Drawing.Image则会报多过进程访问文件的错误，会锁定文件  
            Bitmap bmPhoto = new Bitmap(CutWidth, CutHeight, System.Drawing.Imaging.PixelFormat.Format24bppRgb);  
            bmPhoto.SetResolution(72, 72);  
            Graphics gbmPhoto = Graphics.FromImage(bmPhoto);  
            gbmPhoto.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;  
            gbmPhoto.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;  
  
            gbmPhoto.DrawImage(  
                  imgPhoto  
                , new Rectangle(0, 0, CutWidth, CutHeight)  
                , new Rectangle(PointX, PointY, CutHeight, CutHeight)  
                , GraphicsUnit.Pixel  
                );  
            bmPhoto.Save(sImgPath, System.Drawing.Imaging.ImageFormat.Jpeg);  
            imgPhoto.Dispose();  
            gbmPhoto.Dispose();  
            bmPhoto.Dispose();  
              
              
              
            ms.Close();  
  
  
            return true;  
  
  
        }  
        catch  
        {  
            return false;  
        }  
        finally  
        {  
        }  
    }  
  
  
}
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