我要评论一个小小的随机数生成
/// <summary> /// lou 2019-9-25 15:14:02 生成随机字符串 /// </summary> /// <param name="length">返回值的长度</param> /// <param name="type">返回值类型，1：纯数字；2：小写字母；3：大写字母；4：大小写字母混合；5：小写字母和数字混合；6：大写字母和数字混合；7：大小写字母和数字混合</param> /// <returns></returns> public static string getcode(int length, int type) { string str = "0123456789abcdefghigklmnopqrstuvwxyzabcdefghigklmnopqrstuvwxyz"; string retstr = ""; random rnd = new random(getrandomseed()); for (int i = 0; i < length; i++) { switch (type) { case 1: retstr += rnd.next(10).tostring(); break; case 2: retstr += str.substring(10 + rnd.next(26), 1); break; case 3: retstr += str.substring(36 + rnd.next(26), 1); break; case 4: retstr += str.substring(10 + rnd.next(52), 1); break; case 5: retstr += str.substring(0 + rnd.next(36), 1); break; case 6: retstr += str.substring(0 + rnd.next(36), 1).toupper(); break; case 7: retstr += str.substring(0 + rnd.next(61), 1); break; } } if (retstr == "") { retstr = getcode(length, type); } return retstr; } /// <summary> /// 描 述:创建加密随机数生成器 生成强随机种子 /// </summary> /// <returns></returns> private static int getrandomseed() { byte[] bytes = new byte[4]; rngcryptoserviceprovider rng = new rngcryptoserviceprovider(); rng.getbytes(bytes); return bitconverter.toint32(bytes, 0); }
您可能感兴趣的文章:
如您对本文有疑问或者有任何想说的，请 点击进行留言回复，万千网友为您解惑！
网友评论