JS刷新验证码5.docx

ASP.NET中的无刷新验证码的开发(完整代.本站整理 互联网 2010-11-15 点击： 933 我要评论 -复制代码 代码如下: 无标题页 function DoFresh() document.getElementById(Image1).src = VerifyCode.aspx; 验证码： 看不清? using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; public partial class Login : System.Web.UI.Page protected void Page_Load(object sender, EventArgs e) if (!Page.IsPostBack) Image1.ImageUrl = VerifyCode.aspx; protected void btnSubmit_Click(object sender, EventArgs e) if (SessionValidateCode != null) string outputValidateCode = SessionValidateCode as string; string inputValidateCode = txtValidateCode.Text.Trim(); if (string.Compare(outputValidateCode, inputValidateCode, true) != 0) /Response.Write(javascript:alert(输入的验证码错误！);); litErrorMsg.Text = 输入的验证码错误！; else /Response.Write(javascript:alert(输入的验证码正确！);); litErrorMsg.Text = 输入的验证码正确！; #region 调用下面的方法实现客户端保存Cookie验证模式 private void ValidateMethod() if (Request.CookiesCheckCode = null) litErrorMsg.Text = 您的浏览器设置已被禁用 Cookies，您必须设置浏览器允许使用 Cookies 选项后才能使用本系统。; litErrorMsg.Visible = true; return; if (String.Compare(Request.CookiesCheckCode.Value, TextBox1.Text.ToString().Trim(), true) != 0) litErrorMsg.Text = 对不起，验证码错误！; litErrorMsg.Visible = true; return; else litErrorMsg.Text = 恭喜，验证码输入正确！; litErrorMsg.Visible = true; #endregion /VerifyCode.aspx为默认生成的代码 复制代码 代码如下: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.WebParts; using System.Web.UI.HtmlControls; using System.Drawing; using System.Drawing.Imaging; using System.Drawing.Drawing2D; using System.IO; public partial class VerifyCode : System.Web.UI.Page protected void Page_Load(object sender, EventArgs e) /GenerateValidateCode(); GenerateVerifyImage(4);/GenerateVerifyImage(int length) #region 【无刷新仿google波形扭曲彩色】验证码样式0_GenerateValidateCode() private void GenerateValidateCode() this.Length = this.length; this.FontSize = this.fontSize; this.Chaos = this.chaos; this.BackgroundColor = this.backgroundColor; this.ChaosColor = this.chaosColor; this.CodeSerial = this.codeSerial; this.Colors = this.colors; this.Fonts = this.fonts; this.Padding = this.padding; string VNum = this.CreateVerifyCode(); /取随机码 SessionValidateCode = VNum.ToUpper();/取得验证码，以便后来验证 this.CreateImageOnPage(VNum, this.Context); / 输出图片 /Cookie验证模式， 使用Cookies取验证码的值 /Response.Cookies.Add(new HttpCookie(CheckCode, code.ToUpper(); #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 = 22; 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; 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; / / 正弦曲线Wave扭曲图片 / / 图片路径 / 如果扭曲则选择为True / 波形的幅度倍数，越大扭曲的程度越高，一般为3 / 波形的起始相位，取值区间0-2*PI) / public Bitmap TwistImage(Bitmap srcBmp, bool bXDir, double dMultValue, double dPhase) Bitmap destBmp = new Bitmap(srcBmp.Width, srcBmp.Height); / 将位图背景填充为白色 System.Drawing.Graphics graph = Graphics.FromImage(destBmp); graph.FillRectangle(new SolidBrush(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 = 0 & nOldX = 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) + 4 + 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(Fontsfindex, fSize, System.Drawing.FontStyle.Bold); b = new System.Drawing.SolidBrush(Colorscindex); 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 51） image = TwistImage(image, true, 4, 4); return image; #endregion #region 将创建好的图片输出到页面 public void CreateImageOnPage(string code, HttpContext context) Response.BufferOutput = true; /特别注意 Response.Cache.SetExpires(DateTime.Now.AddMilliseconds(-1);/特别注意 Response.Cache.SetCacheability(HttpCacheability.NoCache);/特别注意 Response.AppendHeader(Pragma, No-Cache); /特别注意 MemoryStream ms = new MemoryStream(); Bitmap image = this.CreateImageCode(code); image.Save(ms, ImageFormat.Jpeg); Response.ClearContent(); Response.ContentType = image/JPEG; Response.BinaryWrite(ms.ToArray(); Response.End(); 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 += arrrandValue; return code; public string CreateVerifyCode() return CreateVerifyCode(0); #endregion #region 另一种验证码样式 GenerateVerifyImage(int length) / / 将创建好的图片输出到页面 / public void GenerateVerifyImage(int nLen) string validateCode = ;/生成的验证码 int nBmpWidth = GetImagewidth(nLen); int nBmpHeight = GetImageHeight(); System.Drawing.Bitmap bmp = new System.Drawing.Bitmap(nBmpWidth, nBmpHeight); /对图像进行弯曲 TwistImage(bmp, true, 12, 2); / 1. 生成随机背景颜色 int nRed, nGreen, nBlue; / 背景的三元色 System.Random rd = new Random(int)System.DateTime.Now.Ticks); nRed = rd.Next(255) % 128 + 128; nGreen = rd.Next(255) % 128 + 128; nBlue = rd.Next(255) % 128 + 128; / 2. 填充位图背景 System.Drawing.Graphics graph = System.Drawing.Graphics.FromImage(bmp); graph.FillRectangle(new SolidBrush(System.Drawing.Color.FromArgb(nRed, nGreen, nBlue) , 0 , 0 , nBmpWidth , nBmpHeight); / 3. 绘制干扰线条，采用比背景略深一些的颜色 int nLines = 3; System.Drawing.Pen pen = new System.Drawing.Pen(System.Drawing.Color.FromArgb(nRed - 17, nGreen - 17, nBlue - 17), 2); for (int a = 0; a nLines; a+) int x1 = rd.Next() % nBmpWidth; int y1 = rd.Next() % nBmpHeight; int x2 = rd.Next() % nBmpWidth; int y2 = rd.Next() % nBmpHeight; graph.DrawLine(pen, x1, y1, x2, y2); / 采用的字符集，可以随即拓展，并可以控制字符出现的几率 string strCode = 0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ; / 4. 循环取得字符，并绘制 for (int i = 0; i nLen; i+) int x = (i * 13 + rd.Next(3); int y = rd.Next(4) + 1; / 确定字体 System.Drawing.Font font = new System.Drawing.Font(Courier New,/文字字体类型 12 + rd.Next() % 4,/文字字体大小 System.Drawing.FontStyle.Bold);/文字字体样式 char c = strCoderd.Next(strCode.Length); / 随机获取字符 validat