生成随机字符串

/// <summary>
/// 获取随机字符串
/// </summary>
/// <param name="Length">字符串长度</param>
/// <param name="Seed">随机函数种子值</param>
/// <returns>指定长度的随机字符串</returns>
public static string RndString( int Length, params int[] Seed )
{
string strSep = ",";
char[] chrSep = strSep.ToCharArray();

//这里定义字符集
string strChar = "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,W,X,Y,Z";

string[] aryChar= strChar.Split( chrSep, strChar.Length );

string strRandom = string.Empty;
Random Rnd;
if( Seed != null && Seed.Length > 0 )
{
Rnd = new Random( Seed[0] );
}
else
{
Rnd = new Random();
}

//生成随机字符串
for( int i=0; i < strLength; i++ )
{
strRandom += aryChar[Rnd.Next( aryChar.Length )];
}

return strRandom;
}