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[ASP.net教程]csharp:VerifyCode in winform or webform


winform:

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;using System.Drawing.Drawing2D;using System.Web;namespace PrintLetterspacing{  /// <summary>  ///   /// </summary>  public partial class Form4 : Form  {    public string code = "";     /// <summary>    ///     /// </summary>    public Form4()    {      InitializeComponent();    }    /// <summary>    ///     /// </summary>    /// <param name="sender"></param>    /// <param name="e"></param>    private void Form4_Load(object sender, EventArgs e)    {      code = CreateVerifyCode();        //取随机码      //1.win      System.IO.MemoryStream ms = new System.IO.MemoryStream();      Bitmap image = this.CreateImageCode(code);      this.pictureBox1.Image = image;      //2.web      //CreateImageOnPage(code, this.Context);    // 输出图片      //Response.Cookies.Add(new HttpCookie("CheckCode", code.ToUpper()));// 使用Cookies取验证码的    }    /// <summary>    /// 生成验证码    /// </summary>    /// <param name="sender"></param>    /// <param name="e"></param>    private void button1_Click(object sender, EventArgs e)    {      code = CreateVerifyCode();        //取随机码      //1.win      System.IO.MemoryStream ms = new System.IO.MemoryStream();      Bitmap image = this.CreateImageCode(code);      this.pictureBox1.Image = image;    }    /// <summary>    /// 验证验证码    /// </summary>    /// <param name="sender"></param>    /// <param name="e"></param>    private void button2_Click(object sender, EventArgs e)    {      if (txtUserCode.Text.Trim().Equals(code.ToLower()))      {        MessageBox.Show("ok");      }      else      {        MessageBox.Show("failure");      }     }    #region 验证码长度(默认4个验证码的长度)    int length = 4;    public int Length    {      get { return length; }      set { length = value; }    }    #endregion    #region 验证码字体大小(为了显示扭曲效果,默认40像素,可以自行修改)    int fontSize = 40;    public int FontSize    {      get { return fontSize; }      set { fontSize = value; }    }    #endregion    #region 边框补(默认1像素)    int padding = 2;    public int Padding    {      get { return padding; }      set { padding = value; }    }    #endregion    #region 是否输出燥点(默认不输出)    bool chaos = true;    public bool Chaos    {      get { return chaos; }      set { chaos = value; }    }    #endregion    #region 输出燥点的颜色(默认灰色)    Color chaosColor = Color.LightGray;    public Color ChaosColor    {      get { return chaosColor; }      set { chaosColor = value; }    }    #endregion    #region 自定义背景色(默认白色)    Color backgroundColor = Color.White;    public Color BackgroundColor    {      get { return backgroundColor; }      set { backgroundColor = value; }    }    #endregion    #region 自定义随机颜色数组    Color[] colors = { Color.Black, Color.Red, Color.DarkBlue, Color.Green, Color.Orange, Color.Brown, Color.DarkCyan, Color.Purple };    public Color[] Colors    {      get { return colors; }      set { colors = value; }    }    #endregion    #region 自定义字体数组    string[] fonts = { "Arial", "Georgia" };    public string[] Fonts    {      get { return fonts; }      set { fonts = value; }    }    #endregion    #region 自定义随机码字符串序列(使用逗号分隔)    //string codeSerial = "0,1,2,3,4,5,6,7,8,9,a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z,A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z";    string codeSerial = "阿,保,持,的,法,规,和,东,三,省,问,我,惹,你,诶,没,改,变,揍,屁,股,吧,涂,聚,文,中,国";    public string CodeSerial    {      get { return codeSerial; }      set { codeSerial = value; }    }    #endregion    #region 产生波形滤镜效果    private const double PI = 3.1415926535897932384626433832795;    private const double PI2 = 6.283185307179586476925286766559;    /// <summary>    /// 正弦曲线Wave扭曲图片(Edit By 51aspx.com)    /// </summary>    /// <param name="srcBmp">图片路径</param>    /// <param name="bXDir">如果扭曲则选择为True</param>    /// <param name="dMultValue">波形的幅度倍数,越大扭曲的程度越高,一般为3</param>    /// <param name="dPhase">波形的起始相位,取值区间[0-2*PI)</param>    /// <returns></returns>    public System.Drawing.Bitmap TwistImage(Bitmap srcBmp, bool bXDir, double dMultValue, double dPhase)    {      System.Drawing.Bitmap destBmp = new Bitmap(srcBmp.Width, srcBmp.Height);      // 将位图背景填充为白色      System.Drawing.Graphics graph = System.Drawing.Graphics.FromImage(destBmp);      graph.FillRectangle(new SolidBrush(System.Drawing.Color.White), 0, 0, destBmp.Width, destBmp.Height);      graph.Dispose();      double dBaseAxisLen = bXDir ? (double)destBmp.Height : (double)destBmp.Width;      for (int i = 0; i < destBmp.Width; i++)      {        for (int j = 0; j < destBmp.Height; j++)        {          double dx = 0;          dx = bXDir ? (PI2 * (double)j) / dBaseAxisLen : (PI2 * (double)i) / dBaseAxisLen;          dx += dPhase;          double dy = Math.Sin(dx);          // 取得当前点的颜色          int nOldX = 0, nOldY = 0;          nOldX = bXDir ? i + (int)(dy * dMultValue) : i;          nOldY = bXDir ? j : j + (int)(dy * dMultValue);          System.Drawing.Color color = srcBmp.GetPixel(i, j);          if (nOldX >= 0 && nOldX < destBmp.Width           && nOldY >= 0 && nOldY < destBmp.Height)          {            destBmp.SetPixel(nOldX, nOldY, color);          }        }      }      return destBmp;    }    #endregion    #region 生成校验码图片    public Bitmap CreateImageCode(string code)    {      int fSize = FontSize;      int fWidth = fSize + Padding;      int imageWidth = (int)(code.Length * fWidth) + 30 + Padding * 2;      int imageHeight = fSize * 2 + Padding;      System.Drawing.Bitmap image = new System.Drawing.Bitmap(imageWidth, imageHeight);      Graphics g = Graphics.FromImage(image);      g.Clear(BackgroundColor);      Random rand = new Random();      //给背景添加随机生成的燥点      if (this.Chaos)      {        Pen pen = new Pen(ChaosColor, 0);        int c = Length * 10;        for (int i = 0; i < c; i++)        {          int x = rand.Next(image.Width);          int y = rand.Next(image.Height);          g.DrawRectangle(pen, x, y, 1, 1);        }      }      int left = 0, top = 0, top1 = 1, top2 = 1;      int n1 = (imageHeight - FontSize - Padding * 2);      int n2 = n1 / 4;      top1 = n2;      top2 = n2 * 2;      Font f;      Brush b;      int cindex, findex;      //随机字体和颜色的验证码字符      for (int i = 0; i < code.Length; i++)      {        cindex = rand.Next(Colors.Length - 1);        findex = rand.Next(Fonts.Length - 1);        f = new System.Drawing.Font(Fonts[findex], fSize, System.Drawing.FontStyle.Bold);        b = new System.Drawing.SolidBrush(Colors[cindex]);        if (i % 2 == 1)        {          top = top2;        }        else        {          top = top1;        }        left = i * fWidth;        g.DrawString(code.Substring(i, 1), f, b, left, top);      }      //画一个边框 边框颜色为Color.Gainsboro      g.DrawRectangle(new Pen(Color.Gainsboro, 0), 0, 0, image.Width - 1, image.Height - 1);      g.Dispose();      //产生波形(Add By 51aspx.com)      image = TwistImage(image, true, 8, 4);      return image;    }    #endregion    #region 将创建好的图片输出到页面    /// <summary>    ///     /// </summary>    /// <param name="code"></param>    /// <param name="context"></param>    public void CreateImageOnPage(string code, HttpContext context)    {      System.IO.MemoryStream ms = new System.IO.MemoryStream();      Bitmap image = this.CreateImageCode(code);      image.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);      context.Response.ClearContent();      context.Response.ContentType = "image/Jpeg";      context.Response.BinaryWrite(ms.GetBuffer());      ms.Close();      ms = null;      image.Dispose();      image = null;    }    #endregion    #region 生成随机字符码    public string CreateVerifyCode(int codeLen)    {      if (codeLen == 0)      {        codeLen = Length;      }      string[] arr = CodeSerial.Split(',');      string code = "";      int randValue = -1;      Random rand = new Random(unchecked((int)DateTime.Now.Ticks));      for (int i = 0; i < codeLen; i++)      {        randValue = rand.Next(0, arr.Length - 1);        code += arr[randValue];      }      return code;    }    public string CreateVerifyCode()    {      return CreateVerifyCode(0);    }    #endregion  }}

  webform:

 

using System;using System.Data;using System.Configuration;using System.Collections;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.Text;using System.Drawing.Drawing2D;namespace WebVerificationCode{  /// <summary>  /// C#生成中文汉字验证码源码  /// </summary>  public partial class codepng : System.Web.UI.Page  {    string gif = "";    /// <summary>    ///     /// </summary>    /// <param name="sender"></param>    /// <param name="e"></param>    protected void Page_Load(object sender, EventArgs e)    {      switch (Request.QueryString["code"])      {        case "1":          gif = stxt(5);          Session["gif"] = gif;// stxt(5);          break;        case "2":          gif = GetRandomint(4);          Session["gif"] = gif;// GetRandomint(4);          break;        case "3":          gif = CreateRandomCode(4);          Session["gif"] = gif;// CreateRandomCode(4);          break;        default:          gif = CreateRandomCode(4);          Session["gif"] = gif;// CreateRandomCode(4);          break;      }      CreateImage(Session["gif"].ToString());    }    /// <summary>    ///     /// </summary>    /// <param name="codeCount"></param>    /// <returns></returns>    private String GetRandomint(int codeCount)    {      Random random = new Random();      string min = "";      string max = "";      for (int i = 0; i < codeCount; i++)      {        min += "1";        max += "9";      }      return (random.Next(Convert.ToInt32(min), Convert.ToInt32(max)).ToString());    }    /**/    /*  此函数在汉字编码范围内随机创建含两个元素的十六进制字节数组,每个字节数组代表一个汉字,并将  四个字节数组存储在object数组中。  参数:strlength,代表需要产生的汉字个数  */    /// <summary>    ///     /// </summary>    /// <param name="strlength"></param>    /// <returns></returns>    public static object[] CreateRegionCode(int strlength)    {      //定义一个字符串数组储存汉字编码的组成元素      string[] rBase = new String[16] { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f" };      Random rnd = new Random();      //定义一个object数组用来      object[] bytes = new object[strlength];      /**/      /*每循环一次产生一个含两个元素的十六进制字节数组,并将其放入bject数组中    每个汉字有四个区位码组成    区位码第1位和区位码第2位作为字节数组第一个元素    区位码第3位和区位码第4位作为字节数组第二个元素    */      for (int i = 0; i < strlength; i++)      {        //区位码第1位        int r1 = rnd.Next(11, 14);        string str_r1 = rBase[r1].Trim();        //区位码第2位        rnd = new Random(r1 * unchecked((int)DateTime.Now.Ticks) + i);//更换随机数发生器的种子避免产生重复值        int r2;        if (r1 == 13)        {          r2 = rnd.Next(0, 7);        }        else        {          r2 = rnd.Next(0, 16);        }        string str_r2 = rBase[r2].Trim();        //区位码第3位        rnd = new Random(r2 * unchecked((int)DateTime.Now.Ticks) + i);        int r3 = rnd.Next(10, 16);        string str_r3 = rBase[r3].Trim();        //区位码第4位        rnd = new Random(r3 * unchecked((int)DateTime.Now.Ticks) + i);        int r4;        if (r3 == 10)        {          r4 = rnd.Next(1, 16);        }        else if (r3 == 15)        {          r4 = rnd.Next(0, 15);        }        else        {          r4 = rnd.Next(0, 16);        }        string str_r4 = rBase[r4].Trim();        //定义两个字节变量存储产生的随机汉字区位码        byte byte1 = Convert.ToByte(str_r1 + str_r2, 16);        byte byte2 = Convert.ToByte(str_r3 + str_r4, 16);        //将两个字节变量存储在字节数组中        byte[] str_r = new byte[] { byte1, byte2 };        //将产生的一个汉字的字节数组放入object数组中        bytes.SetValue(str_r, i);      }      return bytes;    }    /// <summary>    ///     /// </summary>    /// <param name="num"></param>    /// <returns></returns>    private string stxt(int num)    {      Encoding gb = Encoding.GetEncoding("gb2312");      //调用函数产生10个随机中文汉字编码      object[] bytes = CreateRegionCode(num);      string strtxt = "";      //根据汉字编码的字节数组解码出中文汉字      for (int i = 0; i < num; i++)      {                strtxt += gb.GetString((byte[])Convert.ChangeType(bytes[i], typeof(byte[])));      }      return strtxt;    }    /// <summary>    /// 这个是使用字母,数字混合    /// </summary>    /// <param name="VcodeNum"></param>    /// <returns></returns>    private string CreateRandomCode(int codeCount)    {      string allChar = "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,W,X,Y,Z,a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z";      string[] allCharArray = allChar.Split(',');      string randomCode = "";      int temp = -1;      Random rand = new Random();      for (int i = 0; i < codeCount; i++)      {        if (temp != -1)        {          rand = new Random(i * temp * ((int)DateTime.Now.Ticks));        }        int t = rand.Next(61);        if (temp == t)        {          return CreateRandomCode(codeCount);        }        temp = t;        randomCode += allCharArray[t];      }      return randomCode;    }    /// <summary>    ///     /// </summary>    /// <param name="checkCode"></param>    private void CreateImage(string checkCode)    {      int iwidth = (int)(checkCode.Length * 20);      //1      //System.Drawing.Bitmap image = new System.Drawing.Bitmap(iwidth, 25);      //Graphics g = Graphics.FromImage(image);      //Font f = new System.Drawing.Font("Arial", 10, System.Drawing.FontStyle.Bold);      //Brush b = new System.Drawing.SolidBrush(Color.White);      ////g.FillRectangle(new System.Drawing.SolidBrush(Color.Blue),0,0,image.Width, image.Height);        //g.Clear(Color.Black);      //g.DrawString(checkCode, f, b, 3, 3);      //Pen blackPen = new Pen(Color.Black, 0);      //Random rand = new Random();      ////for (int i=0;i<5;i++)        ////{          ////  int y = rand.Next(image.Height);       ////  g.DrawLine(blackPen,0,y,image.Width,y);      ////}        //System.IO.MemoryStream ms = new System.IO.MemoryStream();      //image.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);      //Response.ClearContent();      //Response.ContentType = "image/Jpeg";      //Response.BinaryWrite(ms.ToArray());           //g.Dispose();      //image.Dispose();      //2      //Response.Clear();      //Bitmap imgOutput = new Bitmap(iwidth, 50);            //Graphics gic = Graphics.FromImage(imgOutput);      //gic.Clear(Color.BlueViolet);      //gic.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;      //gic.DrawString(checkCode, new Font("黑体", 16, FontStyle.Italic), new SolidBrush(Color.White), new PointF(2, 2));      //gic.FillRectangle(new System.Drawing.Drawing2D.LinearGradientBrush(new Point(0, 0), new Point(100, 50), Color.FromArgb(0, 0, 0, 0),Color.FromArgb(255, 255, 255, 255)), 0, 0, 100, 50);      //imgOutput.Save(Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg);      //gic.Dispose();      //imgOutput.Dispose();      //Response.End();       //3      System.Drawing.Bitmap image = CreateImageCode(checkCode);      System.IO.MemoryStream ms = new System.IO.MemoryStream();      image.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);      Response.ClearContent();      Response.ContentType = "image/Jpeg";      Response.BinaryWrite(ms.ToArray());      //g.Dispose();      image.Dispose();    }    #region 产生波形滤镜效果    private const double PI = 3.1415926535897932384626433832795;    private const double PI2 = 6.283185307179586476925286766559;    /// <summary>    /// 正弦曲线Wave扭曲图片(Edit By 51aspx.com)    /// </summary>    /// <param name="srcBmp">图片路径</param>    /// <param name="bXDir">如果扭曲则选择为True</param>    /// <param name="dMultValue">波形的幅度倍数,越大扭曲的程度越高,一般为3</param>    /// <param name="dPhase">波形的起始相位,取值区间[0-2*PI)</param>    /// <returns></returns>    public System.Drawing.Bitmap TwistImage(Bitmap srcBmp, bool bXDir, double dMultValue, double dPhase)    {      System.Drawing.Bitmap destBmp = new Bitmap(srcBmp.Width, srcBmp.Height);      // 将位图背景填充为白色      System.Drawing.Graphics graph = System.Drawing.Graphics.FromImage(destBmp);      graph.FillRectangle(new SolidBrush(System.Drawing.Color.White), 0, 0, destBmp.Width, destBmp.Height);      graph.Dispose();      double dBaseAxisLen = bXDir ? (double)destBmp.Height : (double)destBmp.Width;      for (int i = 0; i < destBmp.Width; i++)      {        for (int j = 0; j < destBmp.Height; j++)        {          double dx = 0;          dx = bXDir ? (PI2 * (double)j) / dBaseAxisLen : (PI2 * (double)i) / dBaseAxisLen;          dx += dPhase;          double dy = Math.Sin(dx);          // 取得当前点的颜色          int nOldX = 0, nOldY = 0;          nOldX = bXDir ? i + (int)(dy * dMultValue) : i;          nOldY = bXDir ? j : j + (int)(dy * dMultValue);          System.Drawing.Color color = srcBmp.GetPixel(i, j);          if (nOldX >= 0 && nOldX < destBmp.Width           && nOldY >= 0 && nOldY < destBmp.Height)          {            destBmp.SetPixel(nOldX, nOldY, color);          }        }      }      return destBmp;    }    #endregion    #region 生成校验码图片    /// <summary>    ///     /// </summary>    /// <param name="code"></param>    /// <returns></returns>    public Bitmap CreateImageCode(string code)    {      int fSize = FontSize;      int fWidth = fSize + Padding;      int imageWidth = (int)(code.Length * fWidth) + 30 + Padding * 2;      int imageHeight = fSize * 2 + Padding;      System.Drawing.Bitmap image = new System.Drawing.Bitmap(imageWidth, imageHeight);      Graphics g = Graphics.FromImage(image);      g.Clear(BackgroundColor);      Random rand = new Random();      //给背景添加随机生成的燥点      if (this.Chaos)      {        Pen pen = new Pen(ChaosColor, 0);        int c = Length * 10;        for (int i = 0; i < c; i++)        {          int x = rand.Next(image.Width);          int y = rand.Next(image.Height);          g.DrawRectangle(pen, x, y, 1, 1);        }      }      int left = 0, top = 0, top1 = 1, top2 = 1;      int n1 = (imageHeight - FontSize - Padding * 2);      int n2 = n1 / 4;      top1 = n2;      top2 = n2 * 2;      Font f;      Brush b;      int cindex, findex;      //随机字体和颜色的验证码字符      for (int i = 0; i < code.Length; i++)      {        cindex = rand.Next(Colors.Length - 1);        findex = rand.Next(Fonts.Length - 1);        f = new System.Drawing.Font(Fonts[findex], fSize, System.Drawing.FontStyle.Bold);        b = new System.Drawing.SolidBrush(Colors[cindex]);        if (i % 2 == 1)        {          top = top2;        }        else        {          top = top1;        }        left = i * fWidth;        g.DrawString(code.Substring(i, 1), f, b, left, top);      }      //画一个边框 边框颜色为Color.Gainsboro      g.DrawRectangle(new Pen(Color.Gainsboro, 0), 0, 0, image.Width - 1, image.Height - 1);      g.Dispose();      //产生波形(Add By 51aspx.com)      image = TwistImage(image, true, 8, 4);      return image;    }    #endregion    #region 验证码长度(默认4个验证码的长度)    int length = 4;    public int Length    {      get { return length; }      set { length = value; }    }    #endregion    #region 验证码字体大小(为了显示扭曲效果,默认40像素,可以自行修改)    int fontSize = 40;    public int FontSize    {      get { return fontSize; }      set { fontSize = value; }    }    #endregion    #region 边框补(默认1像素)    int padding = 2;    public int Padding    {      get { return padding; }      set { padding = value; }    }    #endregion    #region 是否输出燥点(默认不输出)    bool chaos = true;    public bool Chaos    {      get { return chaos; }      set { chaos = value; }    }    #endregion    #region 输出燥点的颜色(默认灰色)    Color chaosColor = Color.LightGray;    public Color ChaosColor    {      get { return chaosColor; }      set { chaosColor = value; }    }    #endregion    #region 自定义背景色(默认白色)    Color backgroundColor = Color.White;    public Color BackgroundColor    {      get { return backgroundColor; }      set { backgroundColor = value; }    }    #endregion    #region 自定义随机颜色数组    Color[] colors = { Color.Black, Color.Red, Color.DarkBlue, Color.Green, Color.Orange, Color.Brown, Color.DarkCyan, Color.Purple };    public Color[] Colors    {      get { return colors; }      set { colors = value; }    }    #endregion    #region 自定义字体数组    string[] fonts = { "Arial", "Georgia" };    public string[] Fonts    {      get { return fonts; }      set { fonts = value; }    }    #endregion    #region 自定义随机码字符串序列(使用逗号分隔)    //string codeSerial = "0,1,2,3,4,5,6,7,8,9,a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z,A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z";    string codeSerial = "阿,保,持,的,法,规,和,东,三,省,问,我,惹,你,诶,没,改,变,揍,屁,股,吧,涂,聚,文,中,国";    public string CodeSerial    {      get { return codeSerial; }      set { codeSerial = value; }    }    #endregion  }}

  测试

using System;using System.Data;using System.Configuration;using System.Collections;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;namespace WebVerificationCode{  /// <summary>  ///   /// </summary>  public partial class _Default : System.Web.UI.Page  {    /// <summary>    ///     /// </summary>    /// <param name="sender"></param>    /// <param name="e"></param>    protected void Page_Load(object sender, EventArgs e)    {    }    /// <summary>    ///     /// </summary>    /// <param name="sender"></param>    /// <param name="e"></param>    protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)    {      switch (DropDownList1.SelectedValue)      {        case "1":          Image1.ImageUrl = "codepng.aspx?code=1";          break;        case "2":          Image1.ImageUrl = "codepng.aspx?code=2";          break;        case "3":          Image1.ImageUrl = "codepng.aspx?code=3";          break;      }    }    /// <summary>    ///     /// </summary>    /// <param name="sender"></param>    /// <param name="e"></param>    protected void Button2_Click(object sender, EventArgs e)    {      if (TextBox1.Text == Session["gif"].ToString())        Response.Write("OK,正确");      else        Response.Write("验证码不符合");    }  }}