Question

我在C＃中有这个号码

Double a = 1.2345678

我想要的是将它制成字符串后看起来像这样：

1.23456

Answer 1

首先，将其转换为字符串。例如，字符串定义为S。然后应用此方法：

S.Remove(S.Length -2);

Answer 2

您可以通过多种方式实现这一目标：

代码：

using System;
using System.Linq;
using System.Text;

namespace RemovingLastTwoNumber
{
    class Program
    {
        static void Main(string[] args)
        {
            // Method 1.
            double number = 1.2345678;
            string numberInStringFormat = number.ToString();
            string TargetNumber = numberInStringFormat.Substring(0, numberInStringFormat.Length - 2);

            Console.WriteLine(number);
            Console.WriteLine(TargetNumber);

            // Method 2.
            string _TargetNumber = Math.Round(number, 5).ToString();
            Console.WriteLine(_TargetNumber);

            // Method 3.
            var characters = number.ToString().ToArray();
            var __Characters = characters.Take(7);
            StringBuilder __targetNumber = new StringBuilder();

            foreach (var character in __Characters)
            {
                __targetNumber.Append(character);
            }

            Console.WriteLine(__targetNumber);

        }
    }
}

如何在将其设为字符串之前从双精度数中删除最后两个数字？

2 个答案: