Question

嗨，我在将字符串转换为int时收到此错误

string oneamount = "1200.12366";
string twoamount = "121.11";
int x=Int32.Parse(oneamount);
int y = Int32.Parse(twoamount);

      
            if (x > y)
            {
                Console.WriteLine("okay");
            }

错误输入的字符串格式不正确

Answer 1

请尝试使用Int32.TryParse函数。它将数字的字符串表示形式转换为其等效的32位带符号整数。返回值指示操作是否成功。

Int32.TryParse Method

签名为：

public static bool TryParse (string s, out int result);

示例：

using System;

public class Example
{
   public static void Main()
   {
      String[] values = { null, "160519", "9432.0", "16,667",
                          "   -322   ", "+4302", "(100);", "01FA" };
      foreach (var value in values)
      {
         int number;

         bool success = Int32.TryParse(value, out number);
         if (success)
         {
            Console.WriteLine("Converted '{0}' to {1}.", value, number);
         }
         else
         {
            Console.WriteLine("Attempted conversion of '{0}' failed.",
                               value ?? "<null>");
         }
      }
   }
}
// The example displays the following output:
//       Attempted conversion of '<null>' failed.
//       Converted '160519' to 160519.
//       Attempted conversion of '9432.0' failed.
//       Attempted conversion of '16,667' failed.
//       Converted '   -322   ' to -322.
//       Converted '+4302' to 4302.
//       Attempted conversion of '(100);' failed.
//       Attempted conversion of '01FA' failed.

一旦整数中的值正确，就可以将它们进行比较以查看操作是否成功。

string oneamount = "1200.12366";
int oneAmountInt32;
string twoamount = "121.11";
int twoAmountInt32;
Int32.TryParse(oneamount, out oneAmountInt32);
Int32.TryParse(twoamount, out twoAmountInt32);

      
if (oneAmountInt32 > twoAmountInt32)
{
    Console.WriteLine("okay");
}

Answer 2

阐述@MichaelRandall的评论。

整数是整数/无小数位。如果要与十进制进行比较，请使用double, float, decimal

出于精确的目的，您可以将string的值转换为decimal

string oneamount = "1200.12366";
string twoamount = "121.11";
var x = Convert.ToDecimal(oneamount);
var y = Convert.ToDecimal(twoamount);

      
            if (x > y)
            {
                Console.WriteLine("okay");
            }

C＃字符串转换为整数并进行比较

2 个答案: