67 lines
2.6 KiB
C#
67 lines
2.6 KiB
C#
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using System;
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using System.Linq;
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namespace DeviceRepair.Models
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{
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/// <summary>
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/// 随机字符串对象
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/// </summary>
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public class RandomString
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{
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///<summary>
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///生成随机字符串
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///</summary>
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///<param name="length">目标字符串的长度</param>
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///<param name="useNum">是否包含数字，1=包含，默认为包含</param>
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///<param name="useLow">是否包含小写字母，1=包含，默认为包含</param>
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///<param name="useUpp">是否包含大写字母，1=包含，默认为包含</param>
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///<param name="useSpe">是否包含特殊字符，1=包含，默认为不包含</param>
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///<param name="custom">要包含的自定义字符，直接输入要包含的字符列表</param>
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///<returns>指定长度的随机字符串</returns>
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public static string GetRandomString(int length, bool useNum = true, bool useLow = true, bool useUpp = true, bool useSpe = false, string custom = "")
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{
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byte[] b = new byte[4];
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new System.Security.Cryptography.RNGCryptoServiceProvider().GetBytes(b);
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Random r = new Random(BitConverter.ToInt32(b, 0));
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string s = null, str = custom;
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if (useNum == true) { str += "0123456789"; }
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if (useLow == true) { str += "abcdefghijklmnopqrstuvwxyz"; }
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if (useUpp == true) { str += "ABCDEFGHIJKLMNOPQRSTUVWXYZ"; }
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if (useSpe == true) { str += "!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~"; }
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for (int i = 0; i < length; i++)
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{
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s += str.Substring(r.Next(0, str.Length - 1), 1);
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}
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return s;
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}
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public static string RandomChangeStringSequence(string originalString)
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{
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char[] vOriginalChars = originalString.ToArray();
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char[] vCharTmp = new char[vOriginalChars.Length];
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for (int i = 0; i < vCharTmp.Length; i++)
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{
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vCharTmp[i] = vOriginalChars[i];
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}
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//打乱数组中元素顺序
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Random rand = new Random(DateTime.Now.Millisecond);
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for (int i = 0; i < vCharTmp.Length; i++)
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{
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int x, y;
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x = rand.Next(0, vCharTmp.Length);
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do
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{
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y = rand.Next(0, vCharTmp.Length);
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} while (y == x);
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var t = vCharTmp[x];
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vCharTmp[x] = vCharTmp[y];
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vCharTmp[y] = t;
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}
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return new string(vCharTmp);
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}
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}
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}
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