產生隨機數

来源：互联网发布：中指数据库编辑：程序博客网时间：2024/06/03 07:40

private string RndNum(int VcodeNum)
        {
            string Vchar = "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,h,e,l,l,o,h,i,l,l";
            string[] VcArray = Vchar.Split(',');
            string VNum = "";
            Random rdm = new Random(unchecked((int)DateTime.Now.Ticks));
            for (int i = 0; i < VcodeNum; i++)
            {
                VNum += VcArray[rdm.Next(0, 61)];
            }
            return VNum;
        }

Split(',')用，分隔

VcodeNum 為產生的位數

Ticks為long型

Random(unchecked((int)DateTime.Now.Ticks)) // long型轉換為int型，因為會報錯，所以用unchecked不檢查

rdm.Next(0, 61) 從第0個到第61個隨即取數，即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

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