C#随机字符串

今天整理以前一个项目源码，发现两个随机生成不重复字符串的方法，觉得用起来挺方便的，在此贴出来，方便以后查阅。方法一：随机生成不重复数字字符串  private int rep=0;

/// /// 生成随机数字字符串 /// /// 待生成的位数 /// 生成的数字字符串 private string GenerateCheckCodeNum(int codeCount) { string str = string.Empty; long num2 = DateTime.Now.Ticks + this.rep; this.rep++; Random random = new Random(((int)(((ulong)num2) & 0xffffffffL)) | ((int)(num2 >> this.rep))); for (int i = 0; i < codeCount; i++) { int num = random.Next(); str = str + ((char)(0x30 + ((ushort)(num % 10)))).ToString(); } return str; }

方法二：随机生成字符串（数字和字母混和）
/// 生成随机字母字符串(数字字母混和) /// /// 待生成的位数 /// 生成的字母字符串 private string GenerateCheckCode(int codeCount) { string str = string.Empty; long num2 = DateTime.Now.Ticks + this.rep; this.rep++; Random random = new Random(((int)(((ulong)num2) & 0xffffffffL)) | ((int)(num2 >> this.rep))); for (int i = 0; i < codeCount; i++) { char ch; int num = random.Next(); if ((num % 2) == 0) { ch = (char)(0x30 + ((ushort)(num % 10))); } else { ch = (char)(0x41 + ((ushort)(num % 0x1a))); } str = str + ch.ToString(); } return str; }