C#生成漂亮验证码完整代码类
话不多说，请看代码：
usingSystem;
usingSystem.Web;
usingSystem.Drawing;
usingSystem.Security.Cryptography;
namespaceDotNet.Utilities
{
///
///验证码类
///
publicclassRand
{
#region生成随机数字
///
///生成随机数字
///
///生成长度
publicstaticstringNumber(intLength)
{
returnNumber(Length,false);
}
///
///生成随机数字
///
///生成长度
///是否要在生成前将当前线程阻止以避免重复
publicstaticstringNumber(intLength,boolSleep)
{
if(Sleep)System.Threading.Thread.Sleep(3);
stringresult="";
System.Randomrandom=newRandom();
for(inti=0;i
///生成随机字母与数字
///
///生成长度
publicstaticstringStr(intLength)
{
returnStr(Length,false);
}
///
///生成随机字母与数字
///
///生成长度
///是否要在生成前将当前线程阻止以避免重复
publicstaticstringStr(intLength,boolSleep)
{
if(Sleep)System.Threading.Thread.Sleep(3);
char[]Pattern=newchar[]{'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'};
stringresult="";
intn=Pattern.Length;
System.Randomrandom=newRandom(~unchecked((int)DateTime.Now.Ticks));
for(inti=0;i
///生成随机纯字母随机数
///
///生成长度
publicstaticstringStr_char(intLength)
{
returnStr_char(Length,false);
}
///
///生成随机纯字母随机数
///
///生成长度
///是否要在生成前将当前线程阻止以避免重复
publicstaticstringStr_char(intLength,boolSleep)
{
if(Sleep)System.Threading.Thread.Sleep(3);
char[]Pattern=newchar[]{'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'};
stringresult="";
intn=Pattern.Length;
System.Randomrandom=newRandom(~unchecked((int)DateTime.Now.Ticks));
for(inti=0;i
///验证图片类
///
publicclassYZMHelper
{
#region私有字段
privatestringtext;
privateBitmapimage;
privateintletterCount=4;//验证码位数
privateintletterWidth=16;//单个字体的宽度范围
privateintletterHeight=20;//单个字体的高度范围
privatestaticbyte[]randb=newbyte[4];
privatestaticRNGCryptoServiceProviderrand=newRNGCryptoServiceProvider();
privateFont[]fonts=
{
newFont(newFontFamily("TimesNewRoman"),10+Next(1),System.Drawing.FontStyle.Regular),
newFont(newFontFamily("Georgia"),10+Next(1),System.Drawing.FontStyle.Regular),
newFont(newFontFamily("Arial"),10+Next(1),System.Drawing.FontStyle.Regular),
newFont(newFontFamily("ComicSansMS"),10+Next(1),System.Drawing.FontStyle.Regular)
};
#endregion
#region公有属性
///
///验证码
///
publicstringText
{
get{returnthis.text;}
}
///
///验证码图片
///
publicBitmapImage
{
get{returnthis.image;}
}
#endregion
#region构造函数
publicYZMHelper()
{
HttpContext.Current.Response.Expires=0;
HttpContext.Current.Response.Buffer=true;
HttpContext.Current.Response.ExpiresAbsolute=DateTime.Now.AddSeconds(-1);
HttpContext.Current.Response.AddHeader("pragma","no-cache");
HttpContext.Current.Response.CacheControl="no-cache";
this.text=Rand.Number(4);
CreateImage();
}
#endregion
#region私有方法
///
///获得下一个随机数
///
///最大值
privatestaticintNext(intmax)
{
rand.GetBytes(randb);
intvalue=BitConverter.ToInt32(randb,0);
value=value%(max+1);
if(value<0)value=-value;
returnvalue;
}
///
///获得下一个随机数
///
///最小值
///最大值
privatestaticintNext(intmin,intmax)
{
intvalue=Next(max-min)+min;
returnvalue;
}
#endregion
#region公共方法
///
///绘制验证码
///
publicvoidCreateImage()
{
intint_ImageWidth=this.text.Length*letterWidth;
Bitmapimage=newBitmap(int_ImageWidth,letterHeight);
Graphicsg=Graphics.FromImage(image);
g.Clear(Color.White);
for(inti=0;i<2;i++)
{
intx1=Next(image.Width-1);
intx2=Next(image.Width-1);
inty1=Next(image.Height-1);
inty2=Next(image.Height-1);
g.DrawLine(newPen(Color.Silver),x1,y1,x2,y2);
}
int_x=-12,_y=0;
for(intint_index=0;int_index
///字体随机颜色
///
publicColorGetRandomColor()
{
RandomRandomNum_First=newRandom((int)DateTime.Now.Ticks);
System.Threading.Thread.Sleep(RandomNum_First.Next(50));
RandomRandomNum_Sencond=newRandom((int)DateTime.Now.Ticks);
intint_Red=RandomNum_First.Next(180);
intint_Green=RandomNum_Sencond.Next(180);
intint_Blue=(int_Red+int_Green>300)?0:400-int_Red-int_Green;
int_Blue=(int_Blue>255)?255:int_Blue;
returnColor.FromArgb(int_Red,int_Green,int_Blue);
}
///
///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)
publicSystem.Drawing.BitmapTwistImage(BitmapsrcBmp,boolbXDir,doubledMultValue,doubledPhase)
{
doublePI=6.283185307179586476925286766559;
BitmapdestBmp=newBitmap(srcBmp.Width,srcBmp.Height);
Graphicsgraph=Graphics.FromImage(destBmp);
graph.FillRectangle(newSolidBrush(Color.White),0,0,destBmp.Width,destBmp.Height);
graph.Dispose();
doubledBaseAxisLen=bXDir?(double)destBmp.Height:(double)destBmp.Width;
for(inti=0;i=0&&nOldX=0&&nOldY
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