Question

How to check if a string is an integer in VB.NET

Answer 1

Imports System

Public Class Program
	Public Shared Sub Main()
		Dim str As String = "2356"
        Dim n As Integer

        If Integer.TryParse(str, n) Then
            Console.Write("yes")
        Else
            Console.Write("no")
        End If
    End Sub
End Class



' run:
'
' yes
'

 

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Answer 2

Imports System

Public Class Program
	Public Shared Sub Main()
		Dim str As String = "2356"

        If Integer.TryParse(str, Nothing) Then
            Console.Write("yes")
        Else
            Console.Write("no")
        End If
    End Sub
End Class



' run:
'
' yes
'

 

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