using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Web;

namespace Planet.OrcaPos.Common
{
public class ValidateCode
{
//需要导入System.Web与System.Drawing
public ValidateCode()
{
}
///

/// 验证码的最大长度 ///

public int MaxLength
{
get { return 10; }
}
///

/// 验证码的最小长度 ///

public int MinLength
{
get { return 1; }
}
///

/// 生成验证码 ///

/// 指定验证码的长度
///
public string CreateValidateCode(int length)
{
int[] randMembers = new int[length];
int[] validateNums = new int[length];
string validateNumberStr = "";
//生成起始序列值
int seekSeek = unchecked((int)DateTime.Now.Ticks);
Random seekRand = new Random(seekSeek);
int beginSeek = (int)seekRand.Next(0, Int32.MaxValue - length * 10000);
int[] seeks = new int[length];
for (int i = 0; i < length; i++)
{
beginSeek += 10000;
seeks[i] = beginSeek;
}
//生成随机数字
for (int i = 0; i < length; i++)
{
Random rand = new Random(seeks[i]);
int pownum = 1 * (int)Math.Pow(10, length);
randMembers[i] = rand.Next(pownum, Int32.MaxValue);
}
//抽取随机数字
for (int i = 0; i < length; i++)
{
string numStr = randMembers[i].ToString();
int numLength = numStr.Length;
Random rand = new Random();
int numPosition = rand.Next(0, numLength - 1);
validateNums[i] = Int32.Parse(numStr.Substring(numPosition, 1));
}
//生成验证码
for (int i = 0; i < length; i++)
{
validateNumberStr += validateNums[i].ToString();
}
return validateNumberStr;
}

    /// <summary>  
    /// 创建验证码的图片  
    /// </summary>  
    /// <param name="containsPage">要输出到的page对象</param>  
    /// <param name="validateNum">验证码</param>  
    public void CreateValidateGraphic(string validateCode, HttpContext context)  
    {  
        Bitmap image = new Bitmap((int)Math.Ceiling(validateCode.Length \* 12.0), 22);  
        Graphics g = Graphics.FromImage(image);  
        try  
        {  
            //生成随机生成器  
            Random random = new Random();  
            //清空图片背景色  
            g.Clear(Color.White);  
            //画图片的干扰线  
            for (int i = 0; i < 25; i++)  
            {  
                int x1 = random.Next(image.Width);  
                int x2 = random.Next(image.Width);  
                int y1 = random.Next(image.Height);  
                int y2 = random.Next(image.Height);  
                g.DrawLine(new Pen(Color.Silver), x1, y1, x2, y2);  
            }  
            Font font = new Font("Arial", 12, (FontStyle.Bold | FontStyle.Italic));  
            //渐变.  
            LinearGradientBrush brush = new LinearGradientBrush(new Rectangle(0, 0, image.Width, image.Height),  
             Color.Blue, Color.DarkRed, 1.2f, true);  
            g.DrawString(validateCode, font, brush, 3, 2);

            //画图片的前景干扰点  
            for (int i = 0; i < 100; i++)  
            {  
                int x = random.Next(image.Width);  
                int y = random.Next(image.Height);  
                image.SetPixel(x, y, Color.FromArgb(random.Next()));  
            }  
            //画图片的边框线  
            g.DrawRectangle(new Pen(Color.Silver), 0, 0, image.Width - 1, image.Height - 1);  
            //保存图片数据  
            MemoryStream stream = new MemoryStream();  
            image.Save(stream, ImageFormat.Jpeg);  
            //输出图片流  
            context.Response.Clear();  
            context.Response.ContentType = "image/jpeg";  
            context.Response.BinaryWrite(stream.ToArray());  
        }  
        finally  
        {  
            g.Dispose();  
            image.Dispose();  
        }  
    }  
    /// <summary>  
    /// 得到验证码图片的长度  
    /// </summary>  
    /// <param name="validateNumLength">验证码的长度</param>  
    /// <returns></returns>  
    public static int GetImageWidth(int validateNumLength)  
    {  
        return (int)(validateNumLength \* 12.0);  
    }  
    /// <summary>  
    /// 得到验证码的高度  
    /// </summary>  
    /// <returns></returns>  
    public static double GetImageHeight()  
    {  
        return 22.5;  
    }  
}  

}

using System;
using System.Collections;
using System.IO;
using System.Drawing;
using System.Drawing.Imaging;
using System.Drawing.Drawing2D;

namespace Planet.OrcaPos.Common
{
public class ImageClass
{
//需要导入System.Drawing
public ImageClass()
{ }

    #region 缩略图  
    /// <summary>  
    /// 生成缩略图  
    /// </summary>  
    /// <param name="originalImagePath">源图路径（物理路径）</param>  
    /// <param name="thumbnailPath">缩略图路径（物理路径）</param>  
    /// <param name="width">缩略图宽度</param>  
    /// <param name="height">缩略图高度</param>  
    /// <param name="mode">生成缩略图的方式</param>  
    public static void MakeThumbnail(string originalImagePath, string thumbnailPath, int width, int height, string mode)  
    {  
        System.Drawing.Image originalImage = System.Drawing.Image.FromFile(originalImagePath);

        int towidth = width;  
        int toheight = height;

        int x = 0;  
        int y = 0;  
        int ow = originalImage.Width;  
        int oh = originalImage.Height;

        switch (mode)  
        {  
            case "HW":  //指定高宽缩放（可能变形）  
                break;  
            case "W":   //指定宽，高按比例  
                toheight = originalImage.Height \* width / originalImage.Width;  
                break;  
            case "H":   //指定高，宽按比例  
                towidth = originalImage.Width \* height / originalImage.Height;  
                break;  
            case "Cut": //指定高宽裁减（不变形）  
                if ((double)originalImage.Width / (double)originalImage.Height > (double)towidth / (double)toheight)  
                {  
                    oh = originalImage.Height;  
                    ow = originalImage.Height \* towidth / toheight;  
                    y = 0;  
                    x = (originalImage.Width - ow) / 2;  
                }  
                else  
                {  
                    ow = originalImage.Width;  
                    oh = originalImage.Width \* height / towidth;  
                    x = 0;  
                    y = (originalImage.Height - oh) / 2;  
                }  
                break;  
            default:  
                break;  
        }

        //新建一个bmp图片  
        System.Drawing.Image bitmap = new System.Drawing.Bitmap(towidth, toheight);

        //新建一个画板  
        System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmap);

        //设置高质量插值法  
        g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;

        //设置高质量,低速度呈现平滑程度  
        g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;

        //清空画布并以透明背景色填充  
        g.Clear(System.Drawing.Color.Transparent);

        //在指定位置并且按指定大小绘制原图片的指定部分  
        //第一个：对哪张图片进行操作。  
        //二：画多么大。  
        //三：画那块区域。  
        g.DrawImage(originalImage, new System.Drawing.Rectangle(0, 0, towidth, toheight), new System.Drawing.Rectangle(x, y, ow, oh), System.Drawing.GraphicsUnit.Pixel);

        try  
        {  
            //以jpg格式保存缩略图  
            bitmap.Save(thumbnailPath, System.Drawing.Imaging.ImageFormat.Jpeg);  
        }  
        catch (System.Exception e)  
        {  
            throw e;  
        }  
        finally  
        {  
            originalImage.Dispose();  
            bitmap.Dispose();  
            g.Dispose();  
        }  
    }  
    #endregion

    #region 图片水印  
    /// <summary>  
    /// 图片水印处理方法  
    /// </summary>  
    /// <param name="path">需要加载水印的图片路径（绝对路径）</param>  
    /// <param name="waterpath">水印图片（绝对路径）</param>  
    /// <param name="location">水印位置（传送正确的代码）</param>  
    public static string ImageWatermark(string path, string waterpath, string location)  
    {  
        string kz\_name = Path.GetExtension(path);  
        if (kz\_name == ".jpg" || kz\_name == ".bmp" || kz\_name == ".jpeg")  
        {  
            DateTime time = DateTime.Now;  
            string filename = "" + time.Year.ToString() + time.Month.ToString() + time.Day.ToString() + time.Hour.ToString() + time.Minute.ToString() + time.Second.ToString() + time.Millisecond.ToString();  
            Image img = Bitmap.FromFile(path);  
            Image waterimg = Image.FromFile(waterpath);  
            Graphics g = Graphics.FromImage(img);  
            ArrayList loca = GetLocation(location, img, waterimg);  
            g.DrawImage(waterimg, new Rectangle(int.Parse(loca\[0\].ToString()), int.Parse(loca\[1\].ToString()), waterimg.Width, waterimg.Height));  
            waterimg.Dispose();  
            g.Dispose();  
            string newpath = Path.GetDirectoryName(path) + filename + kz\_name;  
            img.Save(newpath);  
            img.Dispose();  
            File.Copy(newpath, path, true);  
            if (File.Exists(newpath))  
            {  
                File.Delete(newpath);  
            }  
        }  
        return path;  
    }

    /// <summary>  
    /// 图片水印位置处理方法  
    /// </summary>  
    /// <param name="location">水印位置</param>  
    /// <param name="img">需要添加水印的图片</param>  
    /// <param name="waterimg">水印图片</param>  
    private static ArrayList GetLocation(string location, Image img, Image waterimg)  
    {  
        ArrayList loca = new ArrayList();  
        int x = 0;  
        int y = 0;

        if (location == "LT")  
        {  
            x = 10;  
            y = 10;  
        }  
        else if (location == "T")  
        {  
            x = img.Width / 2 - waterimg.Width / 2;  
            y = img.Height - waterimg.Height;  
        }  
        else if (location == "RT")  
        {  
            x = img.Width - waterimg.Width;  
            y = 10;  
        }  
        else if (location == "LC")  
        {  
            x = 10;  
            y = img.Height / 2 - waterimg.Height / 2;  
        }  
        else if (location == "C")  
        {  
            x = img.Width / 2 - waterimg.Width / 2;  
            y = img.Height / 2 - waterimg.Height / 2;  
        }  
        else if (location == "RC")  
        {  
            x = img.Width - waterimg.Width;  
            y = img.Height / 2 - waterimg.Height / 2;  
        }  
        else if (location == "LB")  
        {  
            x = 10;  
            y = img.Height - waterimg.Height;  
        }  
        else if (location == "B")  
        {  
            x = img.Width / 2 - waterimg.Width / 2;  
            y = img.Height - waterimg.Height;  
        }  
        else  
        {  
            x = img.Width - waterimg.Width;  
            y = img.Height - waterimg.Height;  
        }  
        loca.Add(x);  
        loca.Add(y);  
        return loca;  
    }  
    #endregion

    #region 文字水印  
    /// <summary>  
    /// 文字水印处理方法  
    /// </summary>  
    /// <param name="path">图片路径（绝对路径）</param>  
    /// <param name="size">字体大小</param>  
    /// <param name="letter">水印文字</param>  
    /// <param name="color">颜色</param>  
    /// <param name="location">水印位置</param>  
    public static string LetterWatermark(string path, int size, string letter, Color color, string location)  
    {  
        #region

        string kz\_name = Path.GetExtension(path);  
        if (kz\_name == ".jpg" || kz\_name == ".bmp" || kz\_name == ".jpeg")  
        {  
            DateTime time = DateTime.Now;  
            string filename = "" + time.Year.ToString() + time.Month.ToString() + time.Day.ToString() + time.Hour.ToString() + time.Minute.ToString() + time.Second.ToString() + time.Millisecond.ToString();  
            Image img = Bitmap.FromFile(path);  
            Graphics gs = Graphics.FromImage(img);  
            ArrayList loca = GetLocation(location, img, size, letter.Length);  
            Font font = new Font("宋体", size);  
            Brush br = new SolidBrush(color);  
            gs.DrawString(letter, font, br, float.Parse(loca\[0\].ToString()), float.Parse(loca\[1\].ToString()));  
            gs.Dispose();  
            string newpath = Path.GetDirectoryName(path) + filename + kz\_name;  
            img.Save(newpath);  
            img.Dispose();  
            File.Copy(newpath, path, true);  
            if (File.Exists(newpath))  
            {  
                File.Delete(newpath);  
            }  
        }  
        return path;

        #endregion  
    }

    /// <summary>  
    /// 文字水印位置的方法  
    /// </summary>  
    /// <param name="location">位置代码</param>  
    /// <param name="img">图片对象</param>  
    /// <param name="width">宽(当水印类型为文字时,传过来的就是字体的大小)</param>  
    /// <param name="height">高(当水印类型为文字时,传过来的就是字符的长度)</param>  
    private static ArrayList GetLocation(string location, Image img, int width, int height)  
    {  
        #region

        ArrayList loca = new ArrayList();  //定义数组存储位置  
        float x = 10;  
        float y = 10;

        if (location == "LT")  
        {  
            loca.Add(x);  
            loca.Add(y);  
        }  
        else if (location == "T")  
        {  
            x = img.Width / 2 - (width \* height) / 2;  
            loca.Add(x);  
            loca.Add(y);  
        }  
        else if (location == "RT")  
        {  
            x = img.Width - width \* height;  
        }  
        else if (location == "LC")  
        {  
            y = img.Height / 2;  
        }  
        else if (location == "C")  
        {  
            x = img.Width / 2 - (width \* height) / 2;  
            y = img.Height / 2;  
        }  
        else if (location == "RC")  
        {  
            x = img.Width - height;  
            y = img.Height / 2;  
        }  
        else if (location == "LB")  
        {  
            y = img.Height - width - 5;  
        }  
        else if (location == "B")  
        {  
            x = img.Width / 2 - (width \* height) / 2;  
            y = img.Height - width - 5;  
        }  
        else  
        {  
            x = img.Width - width \* height;  
            y = img.Height - width - 5;  
        }  
        loca.Add(x);  
        loca.Add(y);  
        return loca;

        #endregion  
    }  
    #endregion

    #region 调整光暗  
    /// <summary>  
    /// 调整光暗  
    /// </summary>  
    /// <param name="mybm">原始图片</param>  
    /// <param name="width">原始图片的长度</param>  
    /// <param name="height">原始图片的高度</param>  
    /// <param name="val">增加或减少的光暗值</param>  
    public Bitmap LDPic(Bitmap mybm, int width, int height, int val)  
    {  
        Bitmap bm = new Bitmap(width, height);//初始化一个记录经过处理后的图片对象  
        int x, y, resultR, resultG, resultB;//x、y是循环次数，后面三个是记录红绿蓝三个值的  
        Color pixel;  
        for (x = 0; x < width; x++)  
        {  
            for (y = 0; y < height; y++)  
            {  
                pixel = mybm.GetPixel(x, y);//获取当前像素的值  
                resultR = pixel.R + val;//检查红色值会不会超出\[0, 255\]  
                resultG = pixel.G + val;//检查绿色值会不会超出\[0, 255\]  
                resultB = pixel.B + val;//检查蓝色值会不会超出\[0, 255\]  
                bm.SetPixel(x, y, Color.FromArgb(resultR, resultG, resultB));//绘图  
            }  
        }  
        return bm;  
    }  
    #endregion

    #region 反色处理  
    /// <summary>  
    /// 反色处理  
    /// </summary>  
    /// <param name="mybm">原始图片</param>  
    /// <param name="width">原始图片的长度</param>  
    /// <param name="height">原始图片的高度</param>  
    public Bitmap RePic(Bitmap mybm, int width, int height)  
    {  
        Bitmap bm = new Bitmap(width, height);//初始化一个记录处理后的图片的对象  
        int x, y, resultR, resultG, resultB;  
        Color pixel;  
        for (x = 0; x < width; x++)  
        {  
            for (y = 0; y < height; y++)  
            {  
                pixel = mybm.GetPixel(x, y);//获取当前坐标的像素值  
                resultR = 255 - pixel.R;//反红  
                resultG = 255 - pixel.G;//反绿  
                resultB = 255 - pixel.B;//反蓝  
                bm.SetPixel(x, y, Color.FromArgb(resultR, resultG, resultB));//绘图  
            }  
        }  
        return bm;  
    }  
    #endregion

    #region 浮雕处理  
    /// <summary>  
    /// 浮雕处理  
    /// </summary>  
    /// <param name="oldBitmap">原始图片</param>  
    /// <param name="Width">原始图片的长度</param>  
    /// <param name="Height">原始图片的高度</param>  
    public Bitmap FD(Bitmap oldBitmap, int Width, int Height)  
    {  
        Bitmap newBitmap = new Bitmap(Width, Height);  
        Color color1, color2;  
        for (int x = 0; x < Width - 1; x++)  
        {  
            for (int y = 0; y < Height - 1; y++)  
            {  
                int r = 0, g = 0, b = 0;  
                color1 = oldBitmap.GetPixel(x, y);  
                color2 = oldBitmap.GetPixel(x + 1, y + 1);  
                r = Math.Abs(color1.R - color2.R + 128);  
                g = Math.Abs(color1.G - color2.G + 128);  
                b = Math.Abs(color1.B - color2.B + 128);  
                if (r > 255) r = 255;  
                if (r < 0) r = 0;  
                if (g > 255) g = 255;  
                if (g < 0) g = 0;  
                if (b > 255) b = 255;  
                if (b < 0) b = 0;  
                newBitmap.SetPixel(x, y, Color.FromArgb(r, g, b));  
            }  
        }  
        return newBitmap;  
    }  
    #endregion

    #region 拉伸图片  
    /// <summary>  
    /// 拉伸图片  
    /// </summary>  
    /// <param name="bmp">原始图片</param>  
    /// <param name="newW">新的宽度</param>  
    /// <param name="newH">新的高度</param>  
    public static Bitmap ResizeImage(Bitmap bmp, int newW, int newH)  
    {  
        try  
        {  
            Bitmap bap = new Bitmap(newW, newH);  
            Graphics g = Graphics.FromImage(bap);  
            g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;  
            g.DrawImage(bap, new Rectangle(0, 0, newW, newH), new Rectangle(0, 0, bap.Width, bap.Height), GraphicsUnit.Pixel);  
            g.Dispose();  
            return bap;  
        }  
        catch  
        {  
            return null;  
        }  
    }  
    #endregion

    #region 滤色处理  
    /// <summary>  
    /// 滤色处理  
    /// </summary>  
    /// <param name="mybm">原始图片</param>  
    /// <param name="width">原始图片的长度</param>  
    /// <param name="height">原始图片的高度</param>  
    public Bitmap FilPic(Bitmap mybm, int width, int height)  
    {  
        Bitmap bm = new Bitmap(width, height);//初始化一个记录滤色效果的图片对象  
        int x, y;  
        Color pixel;

        for (x = 0; x < width; x++)  
        {  
            for (y = 0; y < height; y++)  
            {  
                pixel = mybm.GetPixel(x, y);//获取当前坐标的像素值  
                bm.SetPixel(x, y, Color.FromArgb(0, pixel.G, pixel.B));//绘图  
            }  
        }  
        return bm;  
    }  
    #endregion

    #region 左右翻转  
    /// <summary>  
    /// 左右翻转  
    /// </summary>  
    /// <param name="mybm">原始图片</param>  
    /// <param name="width">原始图片的长度</param>  
    /// <param name="height">原始图片的高度</param>  
    public Bitmap RevPicLR(Bitmap mybm, int width, int height)  
    {  
        Bitmap bm = new Bitmap(width, height);  
        int x, y, z; //x,y是循环次数,z是用来记录像素点的x坐标的变化的  
        Color pixel;  
        for (y = height - 1; y >= 0; y--)  
        {  
            for (x = width - 1, z = 0; x >= 0; x--)  
            {  
                pixel = mybm.GetPixel(x, y);//获取当前像素的值  
                bm.SetPixel(z++, y, Color.FromArgb(pixel.R, pixel.G, pixel.B));//绘图  
            }  
        }  
        return bm;  
    }  
    #endregion

    #region 上下翻转  
    /// <summary>  
    /// 上下翻转  
    /// </summary>  
    /// <param name="mybm">原始图片</param>  
    /// <param name="width">原始图片的长度</param>  
    /// <param name="height">原始图片的高度</param>  
    public Bitmap RevPicUD(Bitmap mybm, int width, int height)  
    {  
        Bitmap bm = new Bitmap(width, height);  
        int x, y, z;  
        Color pixel;  
        for (x = 0; x < width; x++)  
        {  
            for (y = height - 1, z = 0; y >= 0; y--)  
            {  
                pixel = mybm.GetPixel(x, y);//获取当前像素的值  
                bm.SetPixel(x, z++, Color.FromArgb(pixel.R, pixel.G, pixel.B));//绘图  
            }  
        }  
        return bm;  
    }  
    #endregion

    #region 压缩图片  
    /// <summary>  
    /// 压缩到指定尺寸  
    /// </summary>  
    /// <param name="oldfile">原文件</param>  
    /// <param name="newfile">新文件</param>  
    public bool Compress(string oldfile, string newfile)  
    {  
        try  
        {  
            System.Drawing.Image img = System.Drawing.Image.FromFile(oldfile);  
            System.Drawing.Imaging.ImageFormat thisFormat = img.RawFormat;  
            Size newSize = new Size(100, 125);  
            Bitmap outBmp = new Bitmap(newSize.Width, newSize.Height);  
            Graphics g = Graphics.FromImage(outBmp);  
            g.CompositingQuality = CompositingQuality.HighQuality;  
            g.SmoothingMode = SmoothingMode.HighQuality;  
            g.InterpolationMode = InterpolationMode.HighQualityBicubic;  
            g.DrawImage(img, new Rectangle(0, 0, newSize.Width, newSize.Height), 0, 0, img.Width, img.Height, GraphicsUnit.Pixel);  
            g.Dispose();  
            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;  
            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;  
                }  
            img.Dispose();  
            if (jpegICI != null) outBmp.Save(newfile, System.Drawing.Imaging.ImageFormat.Jpeg);  
            outBmp.Dispose();  
            return true;  
        }  
        catch  
        {  
            return false;  
        }  
    }  
    #endregion

    #region 图片灰度化  
    public Color Gray(Color c)  
    {  
        int rgb = Convert.ToInt32((double)(((0.3 \* c.R) + (0.59 \* c.G)) + (0.11 \* c.B)));  
        return Color.FromArgb(rgb, rgb, rgb);  
    }  
    #endregion

    #region 转换为黑白图片  
    /// <summary>  
    /// 转换为黑白图片  
    /// </summary>  
    /// <param name="mybt">要进行处理的图片</param>  
    /// <param name="width">图片的长度</param>  
    /// <param name="height">图片的高度</param>  
    public Bitmap BWPic(Bitmap mybm, int width, int height)  
    {  
        Bitmap bm = new Bitmap(width, height);  
        int x, y, result; //x,y是循环次数，result是记录处理后的像素值  
        Color pixel;  
        for (x = 0; x < width; x++)  
        {  
            for (y = 0; y < height; y++)  
            {  
                pixel = mybm.GetPixel(x, y);//获取当前坐标的像素值  
                result = (pixel.R + pixel.G + pixel.B) / 3;//取红绿蓝三色的平均值  
                bm.SetPixel(x, y, Color.FromArgb(result, result, result));  
            }  
        }  
        return bm;  
    }  
    #endregion

    #region 获取图片中的各帧  
    /// <summary>  
    /// 获取图片中的各帧  
    /// </summary>  
    /// <param name="pPath">图片路径</param>  
    /// <param name="pSavePath">保存路径</param>  
    public void GetFrames(string pPath, string pSavedPath)  
    {  
        Image gif = Image.FromFile(pPath);  
        FrameDimension fd = new FrameDimension(gif.FrameDimensionsList\[0\]);  
        int count = gif.GetFrameCount(fd); //获取帧数(gif图片可能包含多帧，其它格式图片一般仅一帧)  
        for (int i = 0; i < count; i++)    //以Jpeg格式保存各帧  
        {  
            gif.SelectActiveFrame(fd, i);  
            gif.Save(pSavedPath + "\\\\frame\_" + i + ".jpg", ImageFormat.Jpeg);  
        }  
    }  
    #endregion  
}  

}

using System;using System.Collections.Generic;using System.Drawing;using System.Drawing.Drawing2D;using System.Drawing.Imaging;using System.IO;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Web;
namespace Planet.OrcaPos.Common{    public class ValidateCode    {//需要导入System.Web与System.Drawing        public ValidateCode()        {        }        ///

        /// 验证码的最大长度        ///

        public int MaxLength        {            get { return 10; }        }        ///

        /// 验证码的最小长度        ///

        public int MinLength        {            get { return 1; }        }        ///

        /// 生成验证码        ///

        /// 指定验证码的长度        ///         public string CreateValidateCode(int length)        {            int[] randMembers = new int[length];            int[] validateNums = new int[length];            string validateNumberStr = "";            //生成起始序列值            int seekSeek = unchecked((int)DateTime.Now.Ticks);            Random seekRand = new Random(seekSeek);            int beginSeek = (int)seekRand.Next(0, Int32.MaxValue - length * 10000);            int[] seeks = new int[length];            for (int i = 0; i < length; i++)            {                beginSeek += 10000;                seeks[i] = beginSeek;            }            //生成随机数字            for (int i = 0; i < length; i++)            {                Random rand = new Random(seeks[i]);                int pownum = 1 * (int)Math.Pow(10, length);                randMembers[i] = rand.Next(pownum, Int32.MaxValue);            }            //抽取随机数字            for (int i = 0; i < length; i++)            {                string numStr = randMembers[i].ToString();                int numLength = numStr.Length;                Random rand = new Random();                int numPosition = rand.Next(0, numLength - 1);                validateNums[i] = Int32.Parse(numStr.Substring(numPosition, 1));            }            //生成验证码            for (int i = 0; i < length; i++)            {                validateNumberStr += validateNums[i].ToString();            }            return validateNumberStr;        }
        ///

        /// 创建验证码的图片        ///

        /// 要输出到的page对象        /// 验证码        public void CreateValidateGraphic(string validateCode, HttpContext context)        {            Bitmap image = new Bitmap((int)Math.Ceiling(validateCode.Length * 12.0), 22);            Graphics g = Graphics.FromImage(image);            try            {                //生成随机生成器                Random random = new Random();                //清空图片背景色                g.Clear(Color.White);                //画图片的干扰线                for (int i = 0; i < 25; i++)                {                    int x1 = random.Next(image.Width);                    int x2 = random.Next(image.Width);                    int y1 = random.Next(image.Height);                    int y2 = random.Next(image.Height);                    g.DrawLine(new Pen(Color.Silver), x1, y1, x2, y2);                }                Font font = new Font("Arial", 12, (FontStyle.Bold | FontStyle.Italic));                //渐变.                LinearGradientBrush brush = new LinearGradientBrush(new Rectangle(0, 0, image.Width, image.Height),                 Color.Blue, Color.DarkRed, 1.2f, true);                g.DrawString(validateCode, font, brush, 3, 2);                               //画图片的前景干扰点                for (int i = 0; i < 100; i++)                {                    int x = random.Next(image.Width);                    int y = random.Next(image.Height);                    image.SetPixel(x, y, Color.FromArgb(random.Next()));                }                //画图片的边框线                g.DrawRectangle(new Pen(Color.Silver), 0, 0, image.Width - 1, image.Height - 1);                //保存图片数据                MemoryStream stream = new MemoryStream();                image.Save(stream, ImageFormat.Jpeg);                //输出图片流                context.Response.Clear();                context.Response.ContentType = "image/jpeg";                context.Response.BinaryWrite(stream.ToArray());            }            finally            {                g.Dispose();                image.Dispose();            }        }        ///

        /// 得到验证码图片的长度        ///

        /// 验证码的长度        ///         public static int GetImageWidth(int validateNumLength)        {            return (int)(validateNumLength * 12.0);        }        ///

        /// 得到验证码的高度        ///

        ///         public static double GetImageHeight()        {            return 22.5;        }    }}