init lserp cs 5.0

2026-07-10 15:25:05 +08:00
commit 90f3fda86a
3799 changed files with 976868 additions and 0 deletions
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+using System.Security.Cryptography;
+
+namespace Zhaizj.Framework.Utils
+{
+	/// <summary>
+	/// 随机数实用类
+	/// </summary>
+	public static class RandomHelper
+	{
+		/// <summary>
+		/// 获取随机字节序列
+		/// </summary>
+		/// <param name="length">字节序列的长度</param>
+		/// <returns>字节序列</returns>
+		public static byte[] GetRandomBytes(int length) {
+			if(length <= 0) {
+				return new byte[0];
+			}
+			RNGCryptoServiceProvider rng = new RNGCryptoServiceProvider();
+			byte[] ret = new byte[length];
+			rng.GetNonZeroBytes(ret);
+			return ret;
+		}
+
+		/// <summary>
+		/// 缺省的字符串取值范围
+		/// </summary>
+		public const string DEFAULT_CHARLIST = "!\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~";
+		/// <summary>
+		/// 可读的字符串取值范围,数字与字母
+		/// </summary>
+		public const string READ_CHARLIST  = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
+
+		/// <summary>
+		/// 获取随机字符串
+		/// </summary>
+		/// <param name="length">字符串长度</param>
+		/// <param name="charList">字符串取值范围（如果为Null或为空，则返回空字符串）</param>
+		/// <returns>随机字符串</returns>
+		public static string GetRandomString(int length, string charList) {
+			if(length <= 0 || Checker.CheckEmptyString("charList", charList, false)) {
+				return string.Empty;
+			}
+			int num = charList.Length;
+			char[] ret = new char[length];
+			byte[] rnd = GetRandomBytes(length);
+			for(int i = 0; i < rnd.Length; i++) {
+				ret[i] = charList[rnd[i] % num];
+			}
+			return new string(ret);
+		}
+
+		/// <summary>
+		/// 获取随机字符串
+		/// </summary>
+		/// <param name="length">字符串长度</param>
+		/// <returns>随机字符串</returns>
+		/// <remarks>
+		/// 缺省使用ASCII从33到126共94个字符作为取值范围
+		/// </remarks>
+		public static string GetRandomString(int length) {
+			return GetRandomString(length, DEFAULT_CHARLIST);
+		}
+	}
+}