C# 随机数生成

using System;using System.Collections.Generic;using System.Text;namespace CreateRandomNo{ class RandomCreate { /// <summary> /// 生成数字随机数 /// </summary> /// <param name="numCount"></param> /// <returns></returns> public static string GetNumPwd(int numCount) { string allNumers = "0123456789"; StringBuilder sb = new StringBuilder(); for (int i = 0; i < numCount; i++) { sb.Append(allNumers[new Random(Guid.NewGuid().GetHashCode()).Next(0, allNumers.Length - 1)]); } return sb.ToString(); } /// <summary> /// 生成大写字母随机数 /// </summary> /// <param name="abcCount"></param> public static string GetABCPwd(int abcCount) { string allWords = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"; StringBuilder sb = new StringBuilder(); for (int i = 0; i < abcCount; i++) { sb.Append(allWords[new Random(Guid.NewGuid().GetHashCode()).Next(0, allWords.Length - 1)]); } return sb.ToString(); } /// <summary> /// 生成小写字母随机数 /// </summary> /// <param name="abcCount"></param> public static string GetabcPwd(int abcCount) { string allWords = "abcdefghijklmnopqrstuvwxyz"; StringBuilder sb = new StringBuilder(); for (int i = 0; i < abcCount; i++) { sb.Append(allWords[new Random(Guid.NewGuid().GetHashCode()).Next(0, allWords.Length - 1)]); } return sb.ToString(); } /// <summary> /// 生成混合随机数 /// </summary> /// <param name="allCount"></param> /// <returns></returns> public static string GetMixPwd(int allCount)//生成混合随机数 { string allNumWord = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"; StringBuilder sb = new StringBuilder(); for (int i = 0; i < allCount; i++) { sb.Append(allNumWord[new Random(Guid.NewGuid().GetHashCode()).Next(0, allNumWord.Length - 1)]); } return sb.ToString(); } /// <summary> /// 自己控制输入的符号和随机生成的位数 /// </summary> /// <param name="refValue">输入的符号</param> /// <param name="refRandomCount">随机生成的位数</param> /// <returns></returns> public static string GetRandomNo(string refValue,int refRandomCount) { string value = refValue; int randomCount = refRandomCount; StringBuilder sb = new StringBuilder(); for (int i = 0; i < randomCount; i++) { sb.Append(value[new Random(Guid.NewGuid().GetHashCode()).Next(0, value.Length - 1)]); } return sb.ToString(); } }}本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/zhvsby/archive/2009/07/10/4335758.aspx