/// <summary>
/// 获取随机字符串
/// </summary>
/// <param name="length">长度</param>
/// <param name="prefix">前缀</param>
/// <param name="suffix">后缀</param>
/// <param name="seedType">StringSeedTypeEnum</param>
/// <param name="caseType">StringCaseTypeEnum</param>
/// <returns></returns>
public static string GetRandomCode(int length, string prefix = "", string suffix = "", StringSeedTypeEnum seedType = StringSeedTypeEnum.Number, StringCaseTypeEnum caseType = StringCaseTypeEnum.Normal)
{
char[] seedList = null;
if (seedType == StringSeedTypeEnum.Number)
{
seedList = NUMBER_SEED_LIST;
}
else if (seedType == StringSeedTypeEnum.Char)
{
seedList = CHAR_SEED_LIST;
}
else
{
seedList = NUMBER_CHAR_SEED_LIST;
}
int seedLength = seedList.Length;
Random random = new Random();
StringBuilder stringBuilder = new StringBuilder();
if (!string.IsNullOrEmpty(prefix))
{
stringBuilder.Append(prefix);
}
for (int index = 0; index < length; index++)
{
stringBuilder.Append(seedList[random.Next(0, seedLength)]);
}
if (!string.IsNullOrEmpty(suffix))
{
stringBuilder.Append(suffix);
}
if (caseType == StringCaseTypeEnum.Lower)
{
return(stringBuilder.ToString().ToLower());
}
else if (caseType == StringCaseTypeEnum.Upper)
{
return(stringBuilder.ToString().ToUpper());
}
return(stringBuilder.ToString());
}
/// <summary>
/// 获取日期字符串
/// </summary>
/// <param name="length">长度</param>
/// <param name="prefix">前缀</param>
/// <param name="suffix">后缀</param>
/// <param name="seedType">StringSeedTypeEnum</param>
/// <param name="caseType">StringCaseTypeEnum</param>
/// <returns></returns>
public static string GetDateCode(int length, string prefix = "", string suffix = "", StringSeedTypeEnum seedType = StringSeedTypeEnum.Number, StringCaseTypeEnum caseType = StringCaseTypeEnum.Normal)
{
string code = DateTime.Now.ToString("yyyyMMddHHmmssfff");
if (length <= code.Length)
{
return(code.Substring(0, length));
}
int subLength = length - code.Length;
if (!string.IsNullOrEmpty(prefix))
{
if (subLength <= prefix.Length)
{
prefix = prefix.Substring(0, prefix.Length - subLength);
}
code = prefix + code;
subLength -= prefix.Length;
}
if (subLength > 0)
{
string randomCode = GetRandomCode(subLength, "", "", seedType, caseType);
code += randomCode;
subLength -= randomCode.Length;
}
if (!string.IsNullOrEmpty(suffix))
{
if (subLength <= suffix.Length)
{
suffix = suffix.Substring(0, suffix.Length - subLength);
}
code += suffix;
subLength -= suffix.Length;
}
return(code);
}
