ASP.NET(C#)图片加文字、图片水印
http://blog.csdn.net/wonsoft/archive/2009/04/29/4136711.aspx
ASP.NET(C#)图片加文字、图片水印
一、图片上加文字:
- //using System.Drawing;
- //using System.IO;
- //using System.Drawing.Imaging;
- private void AddTextToImg(string fileName,string text)
- {
- if(!File.Exists(MapPath(fileName)))
- {
- throw new FileNotFoundException("The file don't exist!");
- }
- if( text == string.Empty )
- {
- return;
- }
- //还需要判断文件类型是否为图像类型,这里就不赘述了
- System.Drawing.Image image = System.Drawing.Image.FromFile(MapPath(fileName));
- Bitmap bitmap = new Bitmap(image,image.Width,image.Height);
- Graphics g = Graphics.FromImage(bitmap);
- float fontSize = 12.0f; //字体大小
- float textWidth = text.Length*fontSize; //文本的长度
- //下面定义一个矩形区域,以后在这个矩形里画上白底黑字
- float rectX = 0;
- float rectY = 0;
- float rectWidth = text.Length*(fontSize+8);
- float rectHeight = fontSize+8;
- //声明矩形域
- RectangleF textArea = new RectangleF(rectX,rectY,rectWidth,rectHeight);
- Font font = new Font("宋体",fontSize); //定义字体
- Brush whiteBrush = new SolidBrush(Color.White); //白笔刷,画文字用
- Brush blackBrush = new SolidBrush(Color.Black); //黑笔刷,画背景用
- g.FillRectangle(blackBrush,rectX,rectY,rectWidth,rectHeight);
- g.DrawString(text,font,whiteBrush,textArea);
- MemoryStream ms = new MemoryStream( );
- //保存为Jpg类型
- bitmap.Save(ms,ImageFormat.Jpeg);
- //输出处理后的图像,这里为了演示方便,我将图片显示在页面中了
- Response.Clear();
- Response.ContentType = "image/jpeg";
- Response.BinaryWrite( ms.ToArray() );
- g.Dispose();
- bitmap.Dispose();
- image.Dispose();
- }
二、图片上加水印:
- //using System;
- //using System.Web;
- //using System.Drawing;
- //using System.Drawing.Drawing2D;
- //using System.Drawing.Imaging;
- //using System.IO;
- //using System.Reflection;
- /// <summary>
- /// 给图片上水印
- /// </summary>
- /// <param name="filePath">原图片地址</param>
- /// <param name="waterFile">水印图片地址</param>
- public void MarkWater(string filePath,string waterFile)
- {
- //GIF不水印
- int i = filePath.LastIndexOf(".");
- string ex = filePath.Substring(i,filePath.Length - i);
- if(string.Compare(ex,".gif",true) == 0)
- {
- return;
- }
- string ModifyImagePath = BasePath + filePath;//修改的图像路径
- int lucencyPercent=25;
- Image modifyImage=null;
- Image drawedImage=null;
- Graphics g=null;
- try
- {
- //建立图形对象
- modifyImage=Image.FromFile(ModifyImagePath,true);
- drawedImage=Image.FromFile(BasePath + waterFile,true);
- g=Graphics.FromImage(modifyImage);
- //获取要绘制图形坐标
- int x=modifyImage.Width-drawedImage.Width;
- int y=modifyImage.Height-drawedImage.Height;
- //设置颜色矩阵
- float[][] matrixItems ={
- new float[] {1, 0, 0, 0, 0},
- new float[] {0, 1, 0, 0, 0},
- new float[] {0, 0, 1, 0, 0},
- new float[] {0, 0, 0, (float)lucencyPercent/100f, 0},
- new float[] {0, 0, 0, 0, 1}};
- ColorMatrix colorMatrix = new ColorMatrix(matrixItems);
- ImageAttributes imgAttr=new ImageAttributes();
- imgAttr.SetColorMatrix(colorMatrix,ColorMatrixFlag.Default,ColorAdjustType.Bitmap);
- //绘制阴影图像
- g.DrawImage(drawedImage,new Rectangle(x,y,drawedImage.Width,drawedImage.Height),10,10,drawedImage.Width,drawedImage.Height,GraphicsUnit.Pixel,imgAttr);
- //保存文件
- string[] allowImageType={".jpg",".gif",".png",".bmp",".tiff",".wmf",".ico"};
- FileInfo fi=new FileInfo(ModifyImagePath);
- ImageFormat imageType=ImageFormat.Gif;
- switch(fi.Extension.ToLower())
- {
- case ".jpg": imageType=ImageFormat.Jpeg; break;
- case ".gif": imageType=ImageFormat.Gif; break;
- case ".png": imageType=ImageFormat.Png; break;
- case ".bmp": imageType=ImageFormat.Bmp; break;
- case ".tif": imageType=ImageFormat.Tiff; break;
- case ".wmf": imageType=ImageFormat.Wmf; break;
- case ".ico": imageType=ImageFormat.Icon; break;
- default: break;
- }
- MemoryStream ms=new MemoryStream();
- modifyImage.Save(ms,imageType);
- byte[] imgData=ms.ToArray();
- modifyImage.Dispose();
- drawedImage.Dispose();
- g.Dispose();
- FileStream fs=null;
- File.Delete(ModifyImagePath);
- fs=new FileStream(ModifyImagePath,FileMode.Create,FileAccess.Write);
- if(fs!=null)
- {
- fs.Write(imgData,0,imgData.Length);
- fs.Close();
- }
- }
- finally
- {
- try
- {
- drawedImage.Dispose();
- modifyImage.Dispose();
- g.Dispose();
- }
- catch
- {
- }
- }
- }
四、C#图片水印生成类(图片、文字、透明水印)
- /*
- * Class:WaterImage
- * Use for add a water Image to the picture both words and image
- * 2007.07.23 create the file
- *
- * http://www.freeatom.com/ 欢迎您的来访
- *
- * 使用说明:
- * 建议先定义一个WaterImage实例
- * 然后利用实例的属性,去匹配需要进行操作的参数
- * 然后定义一个WaterImageManage实例
- * 利用WaterImageManage实例进行DrawImage(),印图片水印
- * DrawWords()印文字水印
- *
- -*/
- using System;
- using System.Drawing;
- using System.Drawing.Imaging;
- using System.Drawing.Drawing2D;
- using System.IO;
- /// <summary>
- /// 图片位置
- /// </summary>
- public enum ImagePosition
- {
- LeftTop, //左上
- LeftBottom, //左下
- RightTop, //右上
- RigthBottom, //右下
- TopMiddle, //顶部居中
- BottomMiddle, //底部居中
- Center //中心
- }
- /// <summary>
- /// 水印图片的操作管理 Design by Gary Gong From Demetersoft.com
- /// </summary>
- public class WaterImageManage
- {
- /// <summary>
- /// 生成一个新的水印图片制作实例
- /// </summary>
- public WaterImageManage ()
- {
- //
- // TODO: Add constructor logic here
- //
- }
- /// <summary>
- /// 添加图片水印
- /// </summary>
- /// <param name="sourcePicture">源图片文件名</param>
- /// <param name="waterImage">水印图片文件名</param>
- /// <param name="alpha">透明度(0.1-1.0数值越小透明度越高)</param>
- /// <param name="position">位置</param>
- /// <param name="PicturePath" >图片的路径</param>
- /// <returns>返回生成于指定文件夹下的水印文件名</returns>
- public string DrawImage(string sourcePicture,
- string waterImage,
- float alpha,
- ImagePosition position,
- string PicturePath )
- {
- //
- // 判断参数是否有效
- //
- if (sourcePicture == string.Empty || waterImage == string.Empty || alpha == 0.0 || PicturePath == string.Empty)
- {
- return sourcePicture;
- }
- //
- // 源图片,水印图片全路径
- //
- string sourcePictureName = PicturePath + sourcePicture;
- string waterPictureName = PicturePath + waterImage;
- string fileSourceExtension = System.IO.Path.GetExtension(sourcePictureName).ToLower();
- string fileWaterExtension = System.IO.Path.GetExtension(waterPictureName).ToLower();
- //
- // 判断文件是否存在,以及类型是否正确
- //
- if (System.IO.File.Exists(sourcePictureName) == false ||
- System.IO.File.Exists(waterPictureName) == false ||(
- fileSourceExtension != ".gif" &&
- fileSourceExtension != ".jpg" &&
- fileSourceExtension != ".png") || (
- fileWaterExtension != ".gif" &&
- fileWaterExtension != ".jpg" &&
- fileWaterExtension != ".png")
- )
- {
- return sourcePicture;
- }
- //
- // 目标图片名称及全路径
- //
- string targetImage = sourcePictureName.Replace ( System.IO.Path.GetExtension(sourcePictureName),"") + "_1101.jpg";
- //
- // 将需要加上水印的图片装载到Image对象中
- //
- Image imgPhoto = Image.FromFile(sourcePictureName);
- //
- // 确定其长宽
- //
- int phWidth = imgPhoto.Width;
- int phHeight = imgPhoto.Height;
- //
- // 封装 GDI+ 位图,此位图由图形图像及其属性的像素数据组成。
- //
- Bitmap bmPhoto = new Bitmap(phWidth, phHeight, PixelFormat.Format24bppRgb);
- //
- // 设定分辨率
- //
- bmPhoto.SetResolution(imgPhoto.HorizontalResolution, imgPhoto.VerticalResolution);
- //
- // 定义一个绘图画面用来装载位图
- //
- Graphics grPhoto = Graphics.FromImage(bmPhoto);
- //
- //同样,由于水印是图片,我们也需要定义一个Image来装载它
- //
- Image imgWatermark = new Bitmap(waterPictureName);
- //
- // 获取水印图片的高度和宽度
- //
- int wmWidth = imgWatermark.Width;
- int wmHeight = imgWatermark.Height;
- //SmoothingMode:指定是否将平滑处理(消除锯齿)应用于直线、曲线和已填充区域的边缘。
- // 成员名称 说明
- // AntiAlias 指定消除锯齿的呈现。
- // Default 指定不消除锯齿。
- // HighQuality 指定高质量、低速度呈现。
- // HighSpeed 指定高速度、低质量呈现。
- // Invalid 指定一个无效模式。
- // None 指定不消除锯齿。
- grPhoto.SmoothingMode = SmoothingMode.AntiAlias;
- //
- // 第一次描绘,将我们的底图描绘在绘图画面上
- //
- grPhoto.DrawImage(imgPhoto,
- new Rectangle(0, 0, phWidth, phHeight),
- 0,
- 0,
- phWidth,
- phHeight,
- GraphicsUnit.Pixel);
- //
- // 与底图一样,我们需要一个位图来装载水印图片。并设定其分辨率
- //
- Bitmap bmWatermark = new Bitmap(bmPhoto);
- bmWatermark.SetResolution(imgPhoto.HorizontalResolution, imgPhoto.VerticalResolution);
- //
- // 继续,将水印图片装载到一个绘图画面grWatermark
- //
- Graphics grWatermark = Graphics.FromImage(bmWatermark);
- //
- //ImageAttributes 对象包含有关在呈现时如何操作位图和图元文件颜色的信息。
- //
- ImageAttributes imageAttributes = new ImageAttributes();
- //
- //Colormap: 定义转换颜色的映射
- //
- ColorMap colorMap = new ColorMap();
- //
- //我的水印图被定义成拥有绿色背景色的图片被替换成透明
- //
- colorMap.OldColor = Color.FromArgb(255, 0, 255, 0);
- colorMap.NewColor = Color.FromArgb(0, 0, 0, 0);
- ColorMap[] remapTable = { colorMap };
- imageAttributes.SetRemapTable(remapTable, ColorAdjustType.Bitmap);
- float[][] colorMatrixElements = {
- new float[] {1.0f, 0.0f, 0.0f, 0.0f, 0.0f}, // red红色
- new float[] {0.0f, 1.0f, 0.0f, 0.0f, 0.0f}, //green绿色
- new float[] {0.0f, 0.0f, 1.0f, 0.0f, 0.0f}, //blue蓝色
- new float[] {0.0f, 0.0f, 0.0f, alpha, 0.0f}, //透明度
- new float[] {0.0f, 0.0f, 0.0f, 0.0f, 1.0f}};//
- // ColorMatrix:定义包含 RGBA 空间坐标的 5 x 5 矩阵。
- // ImageAttributes 类的若干方法通过使用颜色矩阵调整图像颜色。
- ColorMatrix wmColorMatrix = new ColorMatrix(colorMatrixElements);
- imageAttributes.SetColorMatrix(wmColorMatrix, ColorMatrixFlag.Default,
- ColorAdjustType.Bitmap);
- //
- //上面设置完颜色,下面开始设置位置
- //
- int xPosOfWm;
- int yPosOfWm;
- switch (position)
- {
- case ImagePosition .BottomMiddle :
- xPosOfWm = (phWidth-wmWidth ) / 2 ;
- yPosOfWm = phHeight- wmHeight -10;
- break ;
- case ImagePosition .Center :
- xPosOfWm = (phWidth - wmWidth) / 2;
- yPosOfWm = (phHeight-wmHeight ) / 2;
- break ;
- case ImagePosition .LeftBottom :
- xPosOfWm = 10;
- yPosOfWm = phHeight - wmHeight - 10;
- break ;
- case ImagePosition .LeftTop :
- xPosOfWm = 10;
- yPosOfWm = 10;
- break;
- case ImagePosition .RightTop :
- xPosOfWm = phWidth - wmWidth - 10;
- yPosOfWm = 10;
- break ;
- case ImagePosition .RigthBottom :
- xPosOfWm = phWidth - wmWidth - 10;
- yPosOfWm = phHeight - wmHeight - 10;
- break ;
- case ImagePosition.TopMiddle :
- xPosOfWm = (phWidth - wmWidth) / 2;
- yPosOfWm = 10;
- break ;
- default:
- xPosOfWm = 10;
- yPosOfWm = phHeight - wmHeight - 10;
- break;
- }
- //
- // 第二次绘图,把水印印上去
- //
- grWatermark.DrawImage(imgWatermark,
- new Rectangle(xPosOfWm,
- yPosOfWm,
- wmWidth,
- wmHeight),
- 0,
- 0,
- wmWidth,
- wmHeight,
- GraphicsUnit.Pixel,
- imageAttributes);
- imgPhoto = bmWatermark;
- grPhoto.Dispose();
- grWatermark.Dispose();
- //
- // 保存文件到服务器的文件夹里面
- //
- imgPhoto.Save(targetImage, ImageFormat.Jpeg);
- imgPhoto.Dispose();
- imgWatermark.Dispose();
- return targetImage.Replace (PicturePath,"");
- }
- /// <summary>
- /// 在图片上添加水印文字
- /// </summary>
- /// <param name="sourcePicture">源图片文件</param>
- /// <param name="waterWords">需要添加到图片上的文字</param>
- /// <param name="alpha">透明度</param>
- /// <param name="position">位置</param>
- /// <param name="PicturePath">文件路径</param>
- /// <returns></returns>
- public string DrawWords(string sourcePicture,
- string waterWords,
- float alpha,
- ImagePosition position,
- string PicturePath)
- {
- //
- // 判断参数是否有效
- //
- if (sourcePicture == string.Empty || waterWords == string.Empty || alpha == 0.0 || PicturePath == string.Empty)
- {
- return sourcePicture;
- }
- //
- // 源图片全路径
- //
- string sourcePictureName = PicturePath + sourcePicture;
- string fileExtension = System.IO.Path.GetExtension(sourcePictureName).ToLower();
- //
- // 判断文件是否存在,以及文件名是否正确
- //
- if (System.IO.File.Exists(sourcePictureName) == false || (
- fileExtension != ".gif" &&
- fileExtension != ".jpg" &&
- fileExtension != ".png" ))
- {
- return sourcePicture;
- }
- //
- // 目标图片名称及全路径
- //
- string targetImage = sourcePictureName.Replace(System.IO.Path.GetExtension(sourcePictureName), "") + "_0703.jpg";
- //创建一个图片对象用来装载要被添加水印的图片
- Image imgPhoto = Image.FromFile(sourcePictureName);
- //获取图片的宽和高
- int phWidth = imgPhoto.Width;
- int phHeight = imgPhoto.Height;
- //
- //建立一个bitmap,和我们需要加水印的图片一样大小
- Bitmap bmPhoto = new Bitmap(phWidth, phHeight, PixelFormat.Format24bppRgb);
- //SetResolution:设置此 Bitmap 的分辨率
- //这里直接将我们需要添加水印的图片的分辨率赋给了bitmap
- bmPhoto.SetResolution(imgPhoto.HorizontalResolution, imgPhoto.VerticalResolution);
- //Graphics:封装一个 GDI+ 绘图图面。
- Graphics grPhoto = Graphics.FromImage(bmPhoto);
- //设置图形的品质
- grPhoto.SmoothingMode = SmoothingMode.AntiAlias;
- //将我们要添加水印的图片按照原始大小描绘(复制)到图形中
- grPhoto.DrawImage(
- imgPhoto, // 要添加水印的图片
- new Rectangle(0, 0, phWidth, phHeight), // 根据要添加的水印图片的宽和高
- 0, // X方向从0点开始描绘
- 0, // Y方向
- phWidth, // X方向描绘长度
- phHeight, // Y方向描绘长度
- GraphicsUnit.Pixel); // 描绘的单位,这里用的是像素
- //根据图片的大小我们来确定添加上去的文字的大小
- //在这里我们定义一个数组来确定
- int[] sizes = new int[] { 16, 14, 12, 10, 8, 6, 4 };
- //字体
- Font crFont = null;
- //矩形的宽度和高度,SizeF有三个属性,分别为Height高,width宽,IsEmpty是否为空
- SizeF crSize = new SizeF();
- //利用一个循环语句来选择我们要添加文字的型号
- //直到它的长度比图片的宽度小
- for (int i = 0; i < 7; i++)
- {
- crFont = new Font("arial", sizes[i], FontStyle.Bold);
- //测量用指定的 Font 对象绘制并用指定的 StringFormat 对象格式化的指定字符串。
- crSize = grPhoto.MeasureString(waterWords, crFont);
- // ushort 关键字表示一种整数数据类型
- if ((ushort)crSize.Width < (ushort)phWidth)
- break;
- }
- //截边5%的距离,定义文字显示(由于不同的图片显示的高和宽不同,所以按百分比截取)
- int yPixlesFromBottom = (int)(phHeight * .05);
- //定义在图片上文字的位置
- float wmHeight = crSize.Height;
- float wmWidth = crSize .Width ;
- float xPosOfWm;
- float yPosOfWm;
- switch (position)
- {
- case ImagePosition .BottomMiddle :
- xPosOfWm = phWidth / 2 ;
- yPosOfWm = phHeight- wmHeight -10;
- break ;
- case ImagePosition .Center :
- xPosOfWm = phWidth / 2;
- yPosOfWm = phHeight / 2;
- break ;
- case ImagePosition .LeftBottom :
- xPosOfWm = wmWidth;
- yPosOfWm = phHeight - wmHeight - 10;
- break ;
- case ImagePosition .LeftTop :
- xPosOfWm = wmWidth/2 ;
- yPosOfWm = wmHeight / 2;
- break;
- case ImagePosition .RightTop :
- xPosOfWm = phWidth - wmWidth - 10;
- yPosOfWm = wmHeight;
- break ;
- case ImagePosition .RigthBottom :
- xPosOfWm = phWidth - wmWidth - 10;
- yPosOfWm = phHeight - wmHeight - 10;
- break ;
- case ImagePosition.TopMiddle :
- xPosOfWm = phWidth / 2;
- yPosOfWm = wmWidth;
- break ;
- default:
- xPosOfWm = wmWidth;
- yPosOfWm = phHeight - wmHeight - 10;
- break;
- }
- //封装文本布局信息(如对齐、文字方向和 Tab 停靠位),显示操作(如省略号插入和国家标准 (National) 数字替换)和 OpenType 功能。
- StringFormat StrFormat = new StringFormat();
- //定义需要印的文字居中对齐
- StrFormat.Alignment = StringAlignment.Center;
- //SolidBrush:定义单色画笔。画笔用于填充图形形状,如矩形、椭圆、扇形、多边形和封闭路径。
- //这个画笔为描绘阴影的画笔,呈灰色
- int m_alpha = Convert .ToInt32 ( 256 * alpha);
- SolidBrush semiTransBrush2 = new SolidBrush(Color.FromArgb(m_alpha, 0, 0, 0));
- //描绘文字信息,这个图层向右和向下偏移一个像素,表示阴影效果
- //DrawString 在指定矩形并且用指定的 Brush 和 Font 对象绘制指定的文本字符串。
- grPhoto.DrawString(waterWords, //string of text
- crFont, //font
- semiTransBrush2, //Brush
- new PointF(xPosOfWm + 1, yPosOfWm + 1), //Position
- StrFormat);
- //从四个 ARGB 分量(alpha、红色、绿色和蓝色)值创建 Color 结构,这里设置透明度为153
- //这个画笔为描绘正式文字的笔刷,呈白色
- SolidBrush semiTransBrush = new SolidBrush(Color.FromArgb(153, 255, 255, 255));
- //第二次绘制这个图形,建立在第一次描绘的基础上
- grPhoto.DrawString(waterWords, //string of text
- crFont, //font
- semiTransBrush, //Brush
- new PointF(xPosOfWm, yPosOfWm), //Position
- StrFormat);
- //imgPhoto是我们建立的用来装载最终图形的Image对象
- //bmPhoto是我们用来制作图形的容器,为Bitmap对象
- imgPhoto = bmPhoto;
- //释放资源,将定义的Graphics实例grPhoto释放,grPhoto功德圆满
- grPhoto.Dispose();
- //将grPhoto保存
- imgPhoto.Save(targetImage, ImageFormat.Jpeg);
- imgPhoto.Dispose();
- return targetImage.Replace(PicturePath, "");
- }
- }
- /// <summary>
- /// 装载水印图片的相关信息
- /// </summary>
- public class WaterImage
- {
- public WaterImage ()
- {
- }
- private string m_sourcePicture;
- /// <summary>
- /// 源图片地址名字(带后缀)
- /// </summary>
- public string SourcePicture
- {
- get { return m_sourcePicture; }
- set { m_sourcePicture = value; }
- }
- private string m_waterImager;
- /// <summary>
- /// 水印图片名字(带后缀)
- /// </summary>
- public string WaterPicture
- {
- get { return m_waterImager; }
- set { m_waterImager = value; }
- }
- private float m_alpha;
- /// <summary>
- /// 水印图片文字的透明度
- /// </summary>
- public float Alpha
- {
- get { return m_alpha; }
- set { m_alpha = value; }
- }
- private ImagePosition m_postition;
- /// <summary>
- /// 水印图片或文字在图片中的位置
- /// </summary>
- public ImagePosition Position
- {
- get { return m_postition; }
- set { m_postition = value; }
- }
- private string m_words;
- /// <summary>
- /// 水印文字的内容
- /// </summary>
- public string Words
- {
- get { return m_words; }
- set { m_words = value; }
- }
- }
三、 图片+水印(透明)函数
- <summary>
- /// 添加图片水印
- /// </summary>
- /// <param name="path">原图片绝对地址</param>
- /// <param name="Ext">文件后缀</param>
- public static string addWaterMark(string path,string fileExt)
- {
- System.Drawing.Image image = System.Drawing.Image.FromFile(path);
- Bitmap b = new Bitmap(image.Width, image.Height,System.Drawing.Imaging.PixelFormat.Format24bppRgb);
- Graphics g = Graphics.FromImage(b);
- g.Clear(Color.White);
- g.DrawImage(image, 0, 0, image.Width, image.Height);
- Image watermark = new Bitmap(ConfigurationSettings.AppSettings["PersonalPath"] + @"images\logo.jpg");
- System.Drawing.Imaging.ImageAttributes imageAttributes = new System.Drawing.Imaging.ImageAttributes();
- 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);
- 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, 0.3f, 0.0f},
- new float[] {0.0f, 0.0f, 0.0f, 0.0f, 1.0f}
- };
- System.Drawing.Imaging.ColorMatrix colorMatrix = new System.Drawing.Imaging.ColorMatrix(colorMatrixElements);
- imageAttributes.SetColorMatrix(colorMatrix, System.Drawing.Imaging.ColorMatrixFlag.Default, System.Drawing.Imaging.ColorAdjustType.Bitmap);
- int xpos = 0;
- int ypos = 0;
- xpos = ((image.Width - watermark.Width) - 10);
- ypos = image.Height - watermark.Height - 10;
- g.DrawImage(watermark, new Rectangle(xpos, ypos, watermark.Width, watermark.Height), 0, 0, watermark.Width, watermark.Height, GraphicsUnit.Pixel, imageAttributes);
- watermark.Dispose();
- imageAttributes.Dispose();
- //保存加水印过后的图片,删除原始图片
- Random ro=new Random((int)DateTime.Now.Ticks);
- string temppath = System.DateTime.Now.ToString("yyyy") + "\\" + System.DateTime.Now.ToString("MMdd");
- string fileName = temppath + "\\" + DateTime.Now.ToString("yyyyMMddHHmmss") + ro.Next(10000) + fileExt;
- string filepath = Functions.GetUserFactPath(User.GetUserFromSession().Adddate,User.GetUserFromSession().UserId) + "3\\";
- b.Save(filepath + fileName);
- b.Dispose();
- image.Dispose();
- if(File.Exists(path))
- {
- File.Delete(path);
- }
- return fileName;
- }