/// <summary>
/// 指定字符串转换为指定进制的数字形式
/// </summary>
/// <param name="str">字符串</param>
/// <param name="characters">进制格式</param>
/// <param name="customCharacter">自定义进制字符串</param>
/// <returns>结果</returns>
public static long ToNumberLong(this string str, Characters characters = Characters.DECIMAL, string customCharacter = CHARS_PUREUPPERCHAR)
{
string DisplayText = characters.DisplayText();
if (characters == Characters.Custom && !customCharacter.IsNullOrEmpty())
{
DisplayText = customCharacter;
}
long result = 0;
int j = 0;
foreach (var ch in new string(str.ToCharArray().Reverse().ToArray()))
{
if (!DisplayText.Contains(ch))
{
continue;
}
result += DisplayText.IndexOf(ch) * ((long)Math.Pow(DisplayText.Length, j));
j++;
}
return(result);
}