CODEWITHSUNDEEP
vb.netstringinteger
jman
jman

Reputation: 405

Is there a function to convert a string to an integer in vb.net?

I would like to convert for example the string "98" to the integer 98. Also, is there a way to specify that the value contained in the string is in hexadecimal and that "98" gets converted to 152?

Upvotes: 3

Views: 295

Answers (5)

Maxi
Maxi

Reputation: 79

To convert string "98" to the integer 98, use CInt function. For example:

Dim MyString As String = "98"
Dim MyInteger As Integer

MyInteger = CInt(MyString)

Now MyInteger = 98

Upvotes: 1

Brian Gideon
Brian Gideon

Reputation: 48949

To convert using decimal notation (base-10):

Dim value = Convert.ToInt32("98")

or

Dim value = Integer.Parse("98")

or

Dim value As Integer
If Integer.TryParse("98", value) Then
  Console.WriteLine(value)
End If

To convert using hexadecimal notation (base-16):

Dim value = Convert.ToInt32("98", 16)

or

Dim value = Integer.Parse("98", NumberStyles.HexNumber)

or

Dim value As Integer
If Integer.TryParse("98", NumberStyles.HexNumber, Nothing, value) Then
  Console.WriteLine(value)
End If

The NumberStyles enumeration is in the System.Globalization namespace.

Upvotes: 0

Meta-Knight
Meta-Knight

Reputation: 17845

You would convert the value to Integer with the Parse method:

Dim intValue As Integer = Integer.Parse("98")

To convert an hexadecimal value you can use the AllowHexSpecifier option:

Dim intValueFromHex As Integer = Integer.Parse("98", Globalization.NumberStyles.AllowHexSpecifier)

You can also use the TryParse method if the input value can be in the wrong format:

Dim intValue as integer
If Integer.TryParse("98", intValue)
    Console.WriteLine(intValue)
Else
    Console.WriteLine("Not an integer value")
End If

Upvotes: 1

davisoa
davisoa

Reputation: 5439

I've always been a fan of Integer.TryParse The docs for .NET 4 are here. This method accepts an Integer variable by reference, and returns a Boolean indicating whether the conversion was successful, so you don't have to do any error handling when calling TryParse.

If you use the overload that accepts NumberStyle, you can specify that the string contains a hexadecimal number. Here is the overload.

Upvotes: 3

Jeow Li Huan
Jeow Li Huan

Reputation: 3796

Convert.ToInt32("98")
Convert.ToInt32("98", 16)

Upvotes: 7

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