这是验证码那个页面的cs代码:
private string createValidateCode()
{
string str = "";
string str2 = "0123456789";
Random random = new Random();
for (int i = 0; i < this.codeLen; i++)
{
str = str + str2[random.Next(0, 9)].ToString();
}
this.Session["CImageCode"] = str;
return str;
} private void disturbBitmap(Bitmap bitmap)
{
Random random = new Random();
Color color = new Color();
color = ColorTranslator.FromHtml("#63a2e9");
for (int i = 0; i < bitmap.Width; i++)
{
for (int j = 0; j < bitmap.Height; j++)
{
if (random.Next(100) <= this.fineness)
{
bitmap.SetPixel(i, j, color);
}
}
}
} private void drawValidateCode(Bitmap bitmap, string validateCode)
{
Graphics graphics = Graphics.FromImage(bitmap);
Font font = new Font(this.fontFamily, (float) this.fontSize, this.getFontStyle());
graphics.DrawString(validateCode, font, Brushes.White, (float) this.posX, (float) this.posY);
} private FontStyle getFontStyle()
{
if (this.fontStyle == 1)
{
return FontStyle.Bold;
}
if (this.fontStyle == 2)
{
return FontStyle.Italic;
}
if (this.fontStyle == 3)
{
return (FontStyle.Italic | FontStyle.Bold);
}
return FontStyle.Regular;
}这是登录页面Login.apsx调用验证码页面的代码:
public bool TestValidateCode(string ValidateCode, string ManageType)
{
if (ManageType == "1")
{
return (ValidateCode == Assessment.Number.CityValidateCode);
}
return ((ManageType == "2") && (ValidateCode == this.Session["CImageCode"].ToString()));
}
private string createValidateCode()
{
string str = "";
string str2 = "0123456789";
Random random = new Random();
for (int i = 0; i < this.codeLen; i++)
{
str = str + str2[random.Next(0, 9)].ToString();
}
this.Session["CImageCode"] = str;
return str;
} private void disturbBitmap(Bitmap bitmap)
{
Random random = new Random();
Color color = new Color();
color = ColorTranslator.FromHtml("#63a2e9");
for (int i = 0; i < bitmap.Width; i++)
{
for (int j = 0; j < bitmap.Height; j++)
{
if (random.Next(100) <= this.fineness)
{
bitmap.SetPixel(i, j, color);
}
}
}
} private void drawValidateCode(Bitmap bitmap, string validateCode)
{
Graphics graphics = Graphics.FromImage(bitmap);
Font font = new Font(this.fontFamily, (float) this.fontSize, this.getFontStyle());
graphics.DrawString(validateCode, font, Brushes.White, (float) this.posX, (float) this.posY);
} private FontStyle getFontStyle()
{
if (this.fontStyle == 1)
{
return FontStyle.Bold;
}
if (this.fontStyle == 2)
{
return FontStyle.Italic;
}
if (this.fontStyle == 3)
{
return (FontStyle.Italic | FontStyle.Bold);
}
return FontStyle.Regular;
}这是登录页面Login.apsx调用验证码页面的代码:
public bool TestValidateCode(string ValidateCode, string ManageType)
{
if (ManageType == "1")
{
return (ValidateCode == Assessment.Number.CityValidateCode);
}
return ((ManageType == "2") && (ValidateCode == this.Session["CImageCode"].ToString()));
}
解决方案 »
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using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.IO;
using System.Drawing;
using System.Drawing.Imaging;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
CreateCheckCodeImage(GenerateCheckCode());
}
private string GenerateCheckCode()
{
int number;
char code;
string checkCode = String.Empty;
System.Random random = new Random(); for (int i = 0; i < 4; i++)
{
number = random.Next(); if (number % 2 == 0)
code = (char)('0' + (char)(number % 10));
else
code = (char)('A' + (char)(number % 26)); checkCode += code.ToString();
}
//Response.Cookies.Add(new HttpCookie("CheckCode", checkCode));
Session.Add("CheckCode", checkCode); return checkCode;
} private void CreateCheckCodeImage(string checkCode)
{
if (checkCode == null || checkCode.Trim() == String.Empty)
return;
System.Drawing.Bitmap image = new System.Drawing.Bitmap((int)Math.Ceiling((checkCode.Length * 12.5)), 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);
//画图片的背景噪音线
for (int i = 0; i < 2; 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.Black), x1, y1, x2, y2);
}
Font font = new System.Drawing.Font("Arial", 12, (System.Drawing.FontStyle.Bold | System.Drawing.FontStyle.Italic));
System.Drawing.Drawing2D.LinearGradientBrush brush = new System.Drawing.Drawing2D.LinearGradientBrush(new Rectangle(0, 0, image.Width, image.Height), Color.Blue, Color.DarkRed, 1.2f, true);
g.DrawString(checkCode, font, brush, 2, 2);
//画图片的前景噪音点
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);
System.IO.MemoryStream ms = new System.IO.MemoryStream();
image.Save(ms, System.Drawing.Imaging.ImageFormat.Gif);
Response.ClearContent();
Response.ContentType = "image/Gif";
Response.BinaryWrite(ms.ToArray());
}
finally
{
g.Dispose();
image.Dispose();
}
}
}
然后在建一个页面取名lo.aspx
其中前台源文件HTML中TEXTBOX后的代码
也就相当于 当登陆lo.aspx是自动加载图片<img src="Default.aspx" alt="验证码" />就相当于登陆了Default.aspx
<img src="Default.aspx" alt="验证码" />
<asp:RequiredFieldValidator ID="RequiredFieldValidator3" runat="server" ControlToValidate="txtCheckCode"
ErrorMessage="校验码必填"></asp:RequiredFieldValidator>拉一个按钮!
CS文件中代码为
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;public partial class lo : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{ }
protected void Button1_Click(object sender, EventArgs e)
{
if (Session["CheckCode"].ToString() == txtCheckCode.Text)
{
Response.Redirect("Default2.aspx");
}
else
{
Response.Write("<script>alert('输入错误,请从新输入')</script>");
}
}
}