随机数_随机字符串
/// <summary> /// 获取随机字符串 /// </summary> /// <param name="Length">长度</param> /// <returns></returns> public static string GenerateRandom(int Length) { long tick = DateTime.Now.Ticks; var seed = (int)(tick & 0xffffffffL) | (int)(tick >> 32); //var seed = GetRandomSeed(); Random rd = new Random(seed); return GenerateRandom(rd, Length); } /// <summary> /// 获取随机字符串 /// </summary> /// <param name="Length">长度</param> /// <returns></returns> public static string GenerateRandom(Random rd, int Length) { string strSep = ","; char[] chrSep = strSep.ToCharArray(); 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,V,W,X,Y,Z"; string[] aryChar = strChar.Split(chrSep, strChar.Length); StringBuilder newRandom = new StringBuilder(52); for (int i = 0; i < Length; i++) { newRandom.Append(aryChar[rd.Next(aryChar.Length)]); } return newRandom.ToString(); } /// <summary> /// 产生随机种子 /// </summary> /// <returns></returns> static int GetRandomSeed() { byte[] bytes = new byte[4]; System.Security.Cryptography.RNGCryptoServiceProvider rng = new System.Security.Cryptography.RNGCryptoServiceProvider(); rng.GetBytes(bytes); return BitConverter.ToInt32(bytes, 0); }
