C# random helper class

 

项目中经常需要模拟些假数据，来做测试。这个随机生成数据的helper类就应用而生：

using System; using System.Text; using System.Windows.Media;namespace WpfApplication1.Helper {public static class RandomHelper{private static Random randomSeed = new Random();/// <summary>/// Generates a random string with the given length/// </summary>/// <param name="size">Size of the string</param>/// <param name="lowerCase">If true, generate lowercase string</param>/// <returns>Random string</returns>public static string RandomString(int size, bool lowerCase){// StringBuilder is faster than using strings (+=)StringBuilder RandStr = new StringBuilder(size);// Ascii start position (65 = A / 97 = a)int Start = (lowerCase) ? 97 : 65;// Add random charsfor (int i = 0; i < size; i++)RandStr.Append((char)(26 * randomSeed.NextDouble() + Start));return RandStr.ToString();}public static int RandomInt(int min, int max){return randomSeed.Next(min, max);}public static double RandomDouble(){return randomSeed.NextDouble();}public static double RandomNumber(int min, int max, int digits){return Math.Round(randomSeed.Next(min, max - 1) + randomSeed.NextDouble(), digits);}public static bool RandomBool(){return (randomSeed.NextDouble() > 0.5);}public static DateTime RandomDate(){return RandomDate(new DateTime(1900, 1, 1), DateTime.Now);}public static DateTime RandomDate(DateTime from, DateTime to){TimeSpan range = new TimeSpan(to.Ticks - from.Ticks);return from + new TimeSpan((long)(range.Ticks * randomSeed.NextDouble()));}public static Color RandomColor(){return Color.FromRgb((byte)randomSeed.Next(255), (byte)randomSeed.Next(255), (byte)randomSeed.Next(255));}} }

转载于:https://www.cnblogs.com/HQFZ/p/4120360.html

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