随机生成汉字、字母、数字的方法

/// <summary> /// 替换变量 /// </summary> /// <param name="content"></param> /// <returns></returns> public static string replaceBianLiang(string content) { content = content.Replace("{当前时间}", DateTime.Now.TimeOfDay.ToString()); string[] bianliang = new string[] { "{随机字母}", "{随机数字}", "{随机汉字}" }; Regex r; int count; string readstr=""; foreach(string str in bianliang){ count = (content.Length - content.Replace(str, "").Length) / str.Length; if (str == "{随机汉字}") readstr = RandChina(count); if (str == "{随机数字}") readstr = GenerateCheckCodeNum(count); if (str == "{随机字母}") readstr = GenerateRandomNumber(count); if (count > readstr.Length) count = readstr.Length; r = new Regex(str.Replace("{", "\{").Replace("}", "\}")); for (int i = 0; i < count;i++ ) { content = r.Replace(content, readstr.Substring(i,1), 1); } } return content; } /// <summary> /// 随机生成字符串 /// </summary> /// <param name="Length"></param> /// <returns></returns> public static string GenerateRandomNumber(int Length) { StringBuilder newRandom = new StringBuilder(62); Random rd = new Random(); for (int i = 0; i < Length; i++) { newRandom.Append(constant[rd.Next(62)]); } return newRandom.ToString(); } /// <summary> /// 随机生成数字 /// </summary> /// <param name="codeCount"></param> /// <returns></returns> public static string GenerateCheckCodeNum(int codeCount) { int rep = 0; string str = string.Empty; long num2 = DateTime.Now.Ticks + rep; rep++; Random random = new Random(((int)(((ulong)num2) & 0xffffffffL)) | ((int)(num2 >> rep))); for (int i = 0; i < codeCount; i++) { int num = random.Next(); str = str + ((char)(0x30 + ((ushort)(num % 10)))).ToString(); } return str; } /// <summary> /// 此函数为生成指定数目的汉字 /// </summary> /// <param name="charLen">汉字数目</param> /// <returns>所有汉字</returns> public static string RandChina(int charLen) { int area, code;//汉字由区位和码位组成(都为0-94,其中区位16-55为一级汉字区,56-87为二级汉字区,1-9为特殊字符区) StringBuilder strtem = new StringBuilder(); Random rand = new Random(); for (int i = 0; i < charLen; i++) { area = rand.Next(16, 88); if (area == 55)//第55区只有89个字符 { code = rand.Next(1, 90); } else { code = rand.Next(1, 94); } strtem.Append(Encoding.GetEncoding("GB2312").GetString(new byte[] { Convert.ToByte(area + 160), Convert.ToByte(code + 160) })); } return strtem.ToString(); }