使用C＃中的Convert.ToInt32（）将十进制，八进制，十六进制字符串转换为整数

Convert.ToInt32()方法 (Convert.ToInt32() Method)

Convert.ToInt32() is a predefined method in C#, which returns an integer value (in 32 bits) from given various types of values.

Convert.ToInt32()是C＃中的预定义方法，它从给定的各种类型的值中返回一个整数值(32位)。

Here, we will go with some of the conversion…

在这里，我们将进行一些转换…

Syntax:

句法：

    Convert.ToInt32(input, base);

Here,

这里，

• input is the input string that may contain variable format’s value like decimal/number value, octal value or hexadecimal value.

  输入是可能包含可变格式的值(例如十进制/数字值，八进制值或十六进制值)的输入字符串。

• base is the number system base like, 10 for decimal (which we do not need to write while calling the function), 8 for octal and 16 for the hexadecimal value.

  base是一个数字系统的基数，例如10代表十进制 (调用函数时不需要写)， 8代表八进制 ， 16代表十六进制值 。

Code:

码：

using System;
using System.Text;

namespace Test
{
   
   
    class Program
    {
   
   
        static void Main(string[] args)
        {
   
   
            string input = "";
            int num = 0;
            try
            {
   
   
                input = "12345"; //value is a decimal formatted number
                num = Convert.ToInt32(input); //base is an optional if string contains decimal value 
                Console.WriteLine("num (decimal string to integer) :" + num);
                //we can also provide the base of the input - it is decimal value 
                //so, 10 can be used as base 
                num = Convert.ToInt32(input, 10);
                Console.WriteLine("num (decimal string to integer) :" + num);

                //convert octal string to integer
                input = "30071";
                num = Convert.ToInt32(input, 8);
                Console.WriteLine("num (octal string to integer) :" + num);

                //convert hex string to integer
                input = "3039ACFE";
                num = Convert.ToInt32(input, 16);
                Console.WriteLine("num (hex string to integer) :" + num);                
            }
            catch (Exception ex)
            {
   
   
                Console.WriteLine(ex.ToString());
            }

            //hit ENTER to exit
            Console.ReadLine();
        }
    }
}

Output

输出量

num (decimal string to integer) :12345
num (decimal string to integer) :12345
num (octal string to integer) :12345
num (hex string to integer) :809086206

翻译自: https://www.includehelp.com/dot-net/converting-decimal-octal-hexadecimal-string-to-integer-using-Convert-ToInt32-in-c-sharp.aspx