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");
}
}
}