一个无刷新仿google波形扭曲彩色Asp.net验证码,源代码来自51aspx

由于转载自网上也不详细说了,呵呵我也是只是把code复制过来测试了一下效果而已的。

主要有三个文件

VerifyCode.cs是生成验证码的类库文件,核心

VerifyCodes.aspx:调用上面的类库来生成验证码的页面文件

Index.aspx:前台显示验证码的页面文件

下面就是全部的代码

1.VerifyCode.cs文件

using System;

using System.Data;

using System.Configuration;

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;

///<summary>

/// VerifyCode 的摘要说明

///</summary>

publicclassVerifyCode

{

    #region验证码长度(默认6个验证码的长度)

    int length = 6;

    publicint 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;

    publicint FontSize

    {

        get { return fontSize; }

        set { fontSize = value; }

    }

    #endregion

    #region边框补(默认1像素)

    int padding = 2;

    publicint Padding

    {

        get { return padding; }

        set { padding = value; }

    }

    #endregion

    #region是否输出燥点(默认不输出)

    bool chaos = true;

    publicbool Chaos

    {

        get { return chaos; }

        set { chaos = value; }

    }

    #endregion

    #region输出燥点的颜色(默认灰色)

    Color chaosColor = Color.LightGray;

    publicColor ChaosColor

    {

        get { return chaosColor; }

        set { chaosColor = value; }

    }

    #endregion

    #region自定义背景色(默认白色)

    Color backgroundColor = Color.White;

    publicColor 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 };

    publicColor[] Colors

    {

        get { return colors; }

        set { colors = value; }

    }

    #endregion

    #region自定义字体数组

    string[] fonts = { "Arial", "Georgia", "courier new" };

    publicstring[] 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";

    publicstring CodeSerial

    {

        get { return codeSerial; }

        set { codeSerial = value; }

    }

    #endregion

    #region产生波形滤镜效果

    privateconstdouble PI = 3.1415926535897932384626433832795;

    privateconstdouble 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="nMultValue">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 = newBitmap(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(newSolidBrush(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

    publicBitmap 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 = newRandom();

        //给背景添加随机生成的燥点

        if (this.Chaos)

        {

            Pen pen = newPen(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(newPen(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

    publicvoid 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

    publicstring CreateVerifyCode(int codeLen)

    {

        if (codeLen == 0)

        {

            codeLen = Length;

        }

        string[] arr = CodeSerial.Split(',');

        string code = "";

        int randValue = -1;

        Random rand = newRandom(unchecked((int)DateTime.Now.Ticks));

        for (int i = 0; i < codeLen; i++)

        {

            randValue = rand.Next(0, arr.Length - 1);

            code += arr[randValue];

        }

        return code;

    }

    publicstring CreateVerifyCode()

    {

        return CreateVerifyCode(0);

    }

    #endregion

}

2.VerifyCodes.aspx.cs代码(只要一个Page_Load事件其余的什么也没有了)

Page_Load事件:

VerifyCode v = newVerifyCode();

        string code = v.CreateVerifyCode(4);//验证码长度

        v.CreateImageOnPage(code, this.Context);

        Session["ver"] = code;

3.Verify.aspx代码

<div>

        <img id="imgVerify" alt="看不清?点击更换" onclick="this.src=this.src+'?'" src="VerifyCodes.aspx?"/><br/>

        <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button"/>

        <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>

        <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label></div>

4.Verify.aspx.cs代码:

protectedvoid Button1_Click(object sender, EventArgs e)

    {

        if (TextBox1.Text == Session["ver"].ToString())

        {

            this.Label1.Text = "OKKKKKKKKK";

        }

        else

        {

            this.Label1.Text = "Error";

        }

    }

posted on 2008-01-21 17:12 lunar 阅读(...) 评论(...) 编辑 收藏