生成随机字符串
/// <summary>
/// 生成随机字符串
/// </summary>
/// <param name="length">目标字符串的长度</param>
/// <param name="useNum">是否包含数字，true=包含</param>
/// <param name="useLow">是否包含小写字母，true=包含</param>
/// <param name="useUpp">是否包含大写字母，true=包含</param>
/// <param name="useSpe">是否包含特殊字符，true=包含</param>
/// <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>
/// <returns>指定长度的随机字符串</returns>
internal static string GetRnd(int length, bool useNum, bool useLow, bool useUpp, bool useSpe, string custom)
{
byte[] b = new byte[4];
new RNGCryptoServiceProvider().GetBytes(b);
Random r = new Random(BitConverter.ToInt32(b, 0));
string s = null, str = custom;
if (useNum == true) { str += "0123456789"; }
if (useLow == true) { str += "abcdefghijklmnopqrstuvwxyz"; }
if (useUpp == true) { str += "ABCDEFGHIJKLMNOPQRSTUVWXYZ"; }
if (useSpe == true) { str += "!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~"; }
for (int i = 0; i < length; i++) { s += str.Substring(r.Next(0, str.Length - 1), 1); }
return s;
}
posted on
2010-11-25 15:57
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转载于:https://www.cnblogs.com/wangzb/archive/2010/11/25/1887750.html
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