C#判断整数、小数位数的限定

public static bool IsInteger(string s)
{
    string pattern = @"^\d*$";
    return Regex.IsMatch(s,pattern);
}
///
/// 判断一个字符串是否为合法数字(0-32整数)
///
/// 字符串
///
public static bool IsNumber(string s)
{
    return IsNumber(s,32,0);
}
///
/// 判断一个字符串是否为合法数字(指定整数位数和小数位数)
///
/// 字符串
/// 整数位数
/// 小数位数
///
public static bool IsNumber(string s,int precision,int scale)
{
    if((precision == 0)&&(scale == 0))
    {
        return false;
    }
    string pattern = @"(^\d{1,"+precision+"}";
    if(scale>0)
    {
        pattern += @"\.\d{0,"+scale+"}$)|"+pattern;
    }
    pattern += "$)";
    return Regex.IsMatch(s,pattern);
}