验证码源代码实现c#谢谢阿！！
using System;
using System。Web;
using System。Drawing;
using System。Drawing。Drawing2D;
///
/// Summary description for yanzhengma
///
public class Yanzhengma
{
private string GetRandom()
{
int number;
char charCode;
string strCode = string。 Empty;
System。Random random = new System。Random();
for (i...全部
using System;
using System。Web;
using System。Drawing;
using System。Drawing。Drawing2D;
///
/// Summary description for yanzhengma
///
public class Yanzhengma
{
private string GetRandom()
{
int number;
char charCode;
string strCode = string。
Empty;
System。Random random = new System。Random();
for (int i = 1; i <= 5; i++)
{
number = random。
Next();
if (number % 2 == 0)
{
charCode = (char)('0' + (char)(number % 10));
}
else
{
charCode = (char)('A' + (char)(number % 26));
}
strCode += charCode。
ToString();
}
// System。Web。HttpContext。Current。Response。Cookies
HttpContext。
Current。Response。Cookies。Add(new HttpCookie("codebycookies", strCode));
return strCode;
}
public void DrawRandom()
{
string strCode = GetRandom();
Bitmap image = new Bitmap(100, 30);
Graphics huatu = Graphics。
FromImage(image);
try
{
//生成随机生成器
Random random = new Random();
//清空图片背景色
huatu。
Clear(Color。White);
//画图片的背景噪音线
int x1, x2, y1, y2;
for (int i = 0; i < 10; i++)
{
x1 = random。
Next(image。Width);
x2 = random。Next(image。Width);
y1 = random。
Next(image。Height);
y2 = random。Next(image。Height);
huatu。DrawLine(new Pen(Color。
Silver), x1, y1, x2, y2);
}
Font font = new Font("Arial", 20, (FontStyle。
Bold | System。Drawing。FontStyle。Italic));
LinearGradientBrush brush = new LinearGradientBrush(new Rectangle(0, 0, image。
Width, image。Height), Color。Blue, Color。DarkRed, 1。2f, true);
huatu。DrawString(strCode, 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
huatu。DrawRectangle(new Pen(Color。
Silver), 0, 0, image。Width, image。Height);
System。IO。MemoryStream ms = new System。IO。
MemoryStream();
image。Save(ms, System。Drawing。Imaging。ImageFormat。Bmp);
HttpContext。
Current。Response。ClearContent();
HttpContext。Current。Response。BinaryWrite(ms。ToArray());
}
finally
{
huatu。
Dispose();
image。Dispose();
}
}
}。收起
