分享:我的C#随机字符串类

using System; namespace Yes1000.Str {     public class RandStr     {         private string framerStr = null;         private string numStr = "0123456789";         private string upperStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";         private string lowerStr = "abcdefghijklmnopqrstuvwxyz";         private string markStr = @"`-=[];'\,./~!@#$%^&*()_+{}:""|<>?";         private static Random myRandom = new Random();         /// <summary>         /// 如未提供参数构造,则默认由数字+小写字母构成         /// </summary>         public RandStr()         {             framerStr = numStr + lowerStr;         }         /// <summary>         /// 构造函数,可指定构成的字符         /// </summary>         /// <param name="useNum">是否使用数字</param>         /// <param name="useUpper">是否使用大写字母</param>         /// <param name="useLower">是否使用小写字母</param>         /// <param name="useMark">是否使用符号</param>         public RandStr(bool useNum,bool useUpper,bool useLower,bool useMark)         {             // 如果试图构造不包含任何组成字符的类,则抛出异常             if (!useNum && !useUpper && !useLower && !useMark)             {                 throw new ArgumentException("必须至少使用一种构成字符!");             }             else             {                 if (useNum)                     framerStr += numStr;                 if (useUpper)                     framerStr += upperStr;                 if (useLower)                     framerStr += lowerStr;                 if (useMark)                     framerStr += markStr;             }         }         /// <summary>         /// 使用自定义的组成字符构造         /// </summary>         /// <param name="userStr">自定义字符</param>         public RandStr(string userStr)         {             // 如果试图用空字符串构造类,则抛出异常             if (userStr.Length == 0)             {                 throw new ArgumentException("请至少使用一个字符!");             }             else             {                 framerStr = userStr;             }         }         /// <summary>         /// 取得一个随机字符串         /// </summary>         /// <param name="length">取得随机字符串的长度</param>         /// <returns>返回的随机字符串</returns>         public string GetRandStr(int length)         {             // 获取的长度不能为0个或者负数个             if (length < 1)             {                 throw new ArgumentException("字符长度不能为0或者负数!");             }             else             {                 // 如果只是获取少量随机字符串,                 // 这样没有问题.                 // 但如果需要短时间获取大量随机字符串的话,                 // 这样可能性能不高.                 // 可以改用StringBuilder类来提高性能,                 // 需要的可以自己改一下 ^o^                 string tempStr = null;                 for (int i = 0; i < length; i++)                 {                     int randNum = myRandom.Next(framerStr.Length);                     tempStr += framerStr[randNum];                 }                 return tempStr;             }         }     } }     

貌似BLOG的语法高亮功能会把缩进搞没~而且复制后连换行都没了 - -!!
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此源码为随机字符串生成小工具的核心源码,需要此工具可以访问: