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// ***********************************************************************
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// Assembly : FairUtility
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// Author : Yubao Li
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// Created : 10-13-2015
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//
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// Last Modified By : Yubao Li
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// Last Modified On : 10-13-2015
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// ***********************************************************************
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// <copyright file="GenerateId.cs" company="">
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// Copyright (c) . All rights reserved.
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// </copyright>
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// <summary>创建唯一ID</summary>
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// ***********************************************************************
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using System;
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using System.Security.Cryptography;
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namespace Infrastructure
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{
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public class GenerateId
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{
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public static string GetGuidHash()
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{
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return Guid.NewGuid().ToString().GetHashCode().ToString("x");
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}
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/// <summary>
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/// 生成一个长整型，可以转成19字节长的字符串
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/// </summary>
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/// <returns>System.Int64.</returns>
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public static long GenerateLong()
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{
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byte[] buffer = Guid.NewGuid().ToByteArray();
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return BitConverter.ToInt64(buffer, 0);
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}
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/// <summary>
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/// 生成16个字节长度的数据与英文组合串
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/// </summary>
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public static string GenerateStr()
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{
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long i = 1;
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foreach (byte b in Guid.NewGuid().ToByteArray())
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{
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i *= ((int)b + 1);
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}
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return String.Format("{0:x}", i - DateTime.Now.Ticks);
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}
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/// <summary>
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/// 创建11位的英文与数字组合
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/// </summary>
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/// <returns>System.String.</returns>
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public static string ShortStr()
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{
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return Convert(GenerateLong());
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}
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/// <summary>
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/// 唯一订单号生成
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/// </summary>
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/// <returns></returns>
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public static string GenerateOrderNumber()
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{
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string strDateTimeNumber = DateTime.Now.ToString("yyyyMMddHHmmssffff");
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string strRandomResult = NextRandom(1000, 1).ToString("0000");
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return strDateTimeNumber + strRandomResult;
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}
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#region private
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/// <summary>
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/// 参考：msdn上的RNGCryptoServiceProvider例子
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/// </summary>
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/// <param name="numSeeds"></param>
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/// <param name="length"></param>
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/// <returns></returns>
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private static int NextRandom(int numSeeds, int length)
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{
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// Create a byte array to hold the random value.
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byte[] randomNumber = new byte[length];
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// Create a new instance of the RNGCryptoServiceProvider.
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RNGCryptoServiceProvider rng = new RNGCryptoServiceProvider();
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// Fill the array with a random value.
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rng.GetBytes(randomNumber);
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// Convert the byte to an uint value to make the modulus operation easier.
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uint randomResult = 0x0;
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for (int i = 0; i < length; i++)
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{
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randomResult |= ((uint) randomNumber[i] << ((length - 1 - i)*8));
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}
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return (int) (randomResult%numSeeds) + 1;
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}
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static string Seq = "s9LFkgy5RovixI1aOf8UhdY3r4DMplQZJXPqebE0WSjBn7wVzmN2Gc6THCAKut";
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/// <summary>
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/// 10进制转换为62进制
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/// </summary>
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/// <param name="id"></param>
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/// <returns></returns>
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private static string Convert(long id)
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{
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if (id < 62)
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{
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return Seq[(int) id].ToString();
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}
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int y = (int) (id%62);
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long x = (long) (id/62);
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return Convert(x) + Seq[y];
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}
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#endregion
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}
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} |