图片添加水印代码,CSharp代码库,德仔网

代码语言
代码分类
【CSharp】图片添加水印
作者:天楚 / 发布于2015/10/8/ 940

	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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