产生62位内任意数字大小写字母的随机数
private static char[] constant=
{
'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','V','W','X','Y','Z'
};
public static string GenerateRandom(int Length)
{
System.Text.StringBuilder newRandom = new System.Text.StringBuilder(62);
Random rd= new Random();
for(int i=0;i<Length;i++)
{
newRandom.Append(constant[rd.Next(62)]);
}
return newRandom.ToString();
}
private void Page_Load(object sender, System.EventArgs e)
{
string VNum = "";
VNum = this.RndNum(6);//验证码
Session["checkCode"] = VNum;
}
public string RndNum(int i)
{
string VNum = "";
Random Rnd = new Random();
string Vchar = "0,1,2,3,4,5,6,7,8,9,a,s,d,f,g,h,j,k,l,q,w,e,r,t,y,u,i,o,p,z,x,c,v,b,n,m,Q,W,E,R,T,Y,U,I,O,P,A,S,D,F,G,H,J,K,L,Z,X,C,V,B,N,M";
string[] Vc = Vchar.Split(',');
for(int k =0;k<i;k++)
{
//VNum = VNum + Vc[Rnd.Next(0,61)];
VNum = VNum + Vc[Rnd.Next(0,10)];
}
return VNum;
}