c# - 如何从 C# 中的字符串中提取负整数和正整数

Question

当我需要显示错误信息时，代码会显示十

int _userInt = 0;
string _checkForNumbers = "Mitchell, -10";
var _intInput = string.Join("", _checkForNumbers.Where(char.IsDigit));
int.TryParse(_intInput, out _userInt);
if(_userInt < 0)
{
  Console.WriteLine("Please only enter positive numbers");
  Console.ReadKey(true);
}
else
{
  Console.Write($"{_userInt}");
  Console.ReadKey(true);
}

Answer 1

尝试用正则表达式提取数字

public static decimal[] intRemover (string input)
{
    int n=0;
    MatchCollection matches=Regex.Matches(input,@"[+-]?\d+(\.\d+)?");
    decimal[] decimalarray = new decimal[matches.Count];

    foreach (Match m in matches) 
    {
            decimalarray[n] = decimal.Parse (m.Value);
            n++;
    }
    return decimalarray;
}

Number extraction from strings using Regex