/// <summary>
/// 返回一个固定长度随机字符串。
/// </summary>
/// <param name="length">随机字符串的长度。</param>
/// <param name="type">随机字符串的类型。</param>
/// <returns>固定长度的随机字符串。</returns>
public string NextString(int length, CharacterType type = CharacterType.Default)
{
if (length < 1)
{
throw new ArgumentOutOfRangeException(nameof(length));
}
char[] chars = new char[length];
List <char> charsArray = new List <char>(40);
if (type.HasFlag(CharacterType.UpperCase))
{
charsArray.AddRange(UpperCaseCharacters);
}
if (type.HasFlag(CharacterType.LowerCase))
{
charsArray.AddRange(LowerCaseCharacters);
}
if (type.HasFlag(CharacterType.Numeric))
{
charsArray.AddRange(NumericCharacters);
}
if (type.HasFlag(CharacterType.Special))
{
charsArray.AddRange(SpecialCharacters);
}
for (int i = 0; i < length; i++)
{
chars[i] = charsArray[this.Next(0, charsArray.Count)];
}
return(new string(chars));
}
private IEnumerable <Range <byte> > GetCharacterRanges(CharacterType characterType)
{
IEnumerable <Range <byte> > characterRangeList = Array.Empty <Range <byte> >();
if (characterType.HasFlag(CharacterType.Lowercase))
{
characterRangeList = characterRangeList.Append(_rangeSwitch.Case(CharacterType.Lowercase));
}
if (characterType.HasFlag(CharacterType.Uppercase))
{
characterRangeList = characterRangeList.Append(_rangeSwitch.Case(CharacterType.Uppercase));
}
if (characterType.HasFlag(CharacterType.Numerics))
{
characterRangeList = characterRangeList.Append(_rangeSwitch.Case(CharacterType.Numerics));
}
if (characterType.HasFlag(CharacterType.Symbols))
{
characterRangeList = characterRangeList.Append(_rangeSwitch.Case(CharacterType.Symbols));
}
return(characterRangeList);
}
/// <summary>
/// 返回一个固定长度随机字符串。
/// </summary>
/// <param name="length">随机字符串的长度。</param>
/// <param name="type">随机字符串的类型。</param>
/// <returns>一个固定长度的随机字符串。</returns>
public string NextString(int length, CharacterType type = CharacterType.Default)
{
if(length < 1) throw new ArgumentOutOfRangeException(nameof(length));
char[] chars = new char[length];
List<char> charsArray = new List<char>(40);
if(type.HasFlag(CharacterType.UpperCase)) charsArray.AddRange(UpperCaseCharacters);
if(type.HasFlag(CharacterType.LowerCase)) charsArray.AddRange(LowerCaseCharacters);
if(type.HasFlag(CharacterType.Numeric)) charsArray.AddRange(NumericCharacters);
if(type.HasFlag(CharacterType.Special)) charsArray.AddRange(SpecialCharacters);
for(int i = 0; i < length; i++)
{
chars[i] = charsArray[this.Next(0, charsArray.Count)];
}
return new string(chars);
}