C＃| 使用String.Format（）方法将小数点后的数字四舍五入

To round the digits after the decimal point, we can use String.Format() method, here is the example.

为了将小数点后的数字四舍五入，我们可以使用String.Format()方法，这里是示例。

using System;

namespace ConsoleApplication1
{
     
    class Program
    {
     
        static void Main(string[] args)
        {
     
            //Only two decimal points
            Console.WriteLine("Two digits after decimal point");
            Console.WriteLine(String.Format("{0:0.00}", 512.4246));     
            Console.WriteLine(String.Format("{0:0.00}", 512.4));        
            Console.WriteLine(String.Format("{0:0.00}", 512.0));

            Console.WriteLine("\n\nThree digits after decimal point");
            Console.WriteLine(String.Format("{0:0.000}", 512.4246));
            Console.WriteLine(String.Format("{0:0.000}", 512.4));
            Console.WriteLine(String.Format("{0:0.000}", 512.0));

            Console.WriteLine();  
        }
    }
}

Output

输出量

Two digits after decimal point
512.42
512.40
512.00


Three digits after decimal point
512.425
512.400
512.000

翻译自: https://www.includehelp.com/dot-net/rounding-digits-after-decimal-point-using-string-format-method.aspx