Convert string to integer in vb.net

You can easily convert string to integer value by using Convet.ToInt32 (string) method or int.Parse (string) method both work similar but there is difference in both of them.

Convert.ToInt32 (string): System namespace provide Convert class. It takes object as an argument and it does not through ArgumentNullException when its argument is null value. It will give output 0. It is slower than int.Parse (string).


int.Parse (string):  It is faster then Convert.ToInt32 (string). It returns ArgumentNullException when its argument is null value.

Code:

Module Module1
    Sub Main()

        ' First way to convert string to integer
        ' Convert a string to an integer
        Dim text As String = "99"
        Dim stringToInteger As Integer = Convert.ToInt32(text)
        Console.WriteLine("Convert string using Convert.ToInt32(string) : " & stringToInteger & vbLf)

        ' Second way to convert string to integer
        ' Convert string to number.
        Dim text1 As String = "1919"
        Dim stringToInteger1 As Integer = Integer.Parse(text1)
        Console.WriteLine("Convert string using int.Parse(string) : " & stringToInteger1 & vbLf)

        ' Convert a string to a decimal
        Dim stringToDecimal As Decimal = Convert.ToDecimal("19.19")
        Console.WriteLine("Convert decimal using Convert.ToDecimal(string) : " & stringToDecimal & vbLf)

        ' Booleans can be converted too
        Dim stringToBoolean As Boolean = Convert.ToBoolean("true")
        Console.WriteLine("Boolean value : " & stringToBoolean & vbLf)
        Console.ReadLine()
    End Sub
End Module

Output: