private static string numandletChar = "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,i,s,t,u,v,w,x,y,z"; //数字加字母
/// <summary>
/// 随机产生验证码的数据
/// 创建人：孙佳杰 时间：2015.1.19
/// </summary>
/// <param name="codeNum">长度</param>
/// <param name="mode">模式选择(0,1,2)</param>
/// <returns>验证码的数据</returns>
public static string RandomCode(int codeNum, StringRadomType mode)
{
string[] VcArray = null;
//模式选择
switch (mode)
{
case StringRadomType.SingleNumber: VcArray = numChar.Split(','); break;
case StringRadomType.SingleLetter: VcArray = letChar.Split(','); break;
case StringRadomType.NumberAndLetter: VcArray = numandletChar.Split(','); break;
default: return("模式选择错误");
}
//定义随机器
Random rand = new Random();
int temp = -1;
string returnStr = "";//由于字符很短所以不适用stringbuilder
for (int i = 0; i < codeNum; i++)
{
if (temp != -1)
{
int ranSeed = i * temp *unchecked ((int)DateTime.Now.Ticks); //进行随机的种子公式
rand = new Random(ranSeed);
}
int t = rand.Next(VcArray.Length); //产生随机字符
temp = t;
//定义公式是否将字符大写
if (t % 2 != 0 && t > 9)
{
returnStr += VcArray[t];
}
else
{
returnStr += VcArray[t].ToUpper();
}
}
return(returnStr);
}
private static string numandletChar = "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,i,s,t,u,v,w,x,y,z"; //数字加字母
/// <summary>
/// 随机产生验证码的数据
/// 创建人：孙佳杰 时间：2015.1.19
/// </summary>
/// <param name="codeNum">长度</param>
/// <param name="mode">模式选择(0,1,2)</param>
/// <returns>验证码的数据</returns>
public static string RandomCode(int codeNum, StringRadomType mode)
{
string[] VcArray = null;
//模式选择
switch (mode)
{
case StringRadomType.SingleNumber: VcArray = numChar.Split(','); break;
case StringRadomType.SingleLetter: VcArray = letChar.Split(','); break;
case StringRadomType.NumberAndLetter: VcArray = numandletChar.Split(','); break;
default: return "模式选择错误";
}
//定义随机器
Random rand = new Random();
int temp = -1;
string returnStr = "";//由于字符很短所以不适用stringbuilder
for (int i = 0; i < codeNum; i++)
{
if (temp != -1)
{
int ranSeed = i * temp * unchecked((int)DateTime.Now.Ticks); //进行随机的种子公式
rand = new Random(ranSeed);
}
int t = rand.Next(VcArray.Length); //产生随机字符
temp = t;
//定义公式是否将字符大写
if (t % 2 != 0 && t > 9)
{
returnStr += VcArray[t];
}
else
{
returnStr += VcArray[t].ToUpper();
}
}
return returnStr;
}
