Question

我正在编写一个程序来检查用户是否输入了一个整数，此时它对小数点以外的所有内容起作用。尽管我已将其声明为整数，但try语句并未捕获小数作为异常。我该如何解决这个问题？

Sub Main()
  Dim Test As Integer
      Do
  Console.WriteLine("Enter a whole number")
     Try
        Test = Console.ReadLine()
        Exit Do
         Catch ex As Exception
              Console.WriteLine("You must enter a whole number")
              Console.WriteLine()
              Exit Try
        End Try
      Loop
   Console.ReadLine()
End Sub

Answer 1

使用TryParse

   Dim number As Integer
   Dim result As Boolean = Int32.TryParse(Test, number)
   If result Then
        Console.WriteLine("You entered {0}.", number)
     Else
        Console.WriteLine("You must enter a whole number")
     End If

使用整数数据类型

1 个答案: