Parsing hex values from strings.

[wyrd]

How can I parse a hex string into an integer value?

 

Example.

 

You can this for hex values:

int i = 0x00112233;

 

But this throws an error:

string str = "0x00112233";

int i = int.Parse(str);

 

Any ideas? Thanks in advance.

 

Update:

I've tried using \x00112233 instead, and also (int) and Convert.ToInt32 for conversions (for both type of string values). Nothing has yet to work.

Edited October 26, 2003 by wyrd

[wyrd]

Found solution:

 

Had to change 0x00112233 to 00112233 and then use System.Globalization.NumberStyles.HexNumber:

 

string str = "00112233";

int i = int.Parse(str, System.Globalization.NumberStyles.HexNumber);

[Nerseus]

You can also use Convert.ToInt32(str, 16). The 16 is the "fromBase" parameter, 16 for hex.

 

-Ner

[wyrd]

Hmm.. cool.

[dynamic_sysop]

have you tried replacing the 0x parts with &H ? eg:

   Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
       '/// try replacing the 0x with &H
       Dim x As Integer = (&H112233) '/// the 2 zeros will disappear
       '/// or as a string
       Dim s As String = "&H00112233" '/// same as &H112233
       Dim i As Integer = s '/// no need to Parse.
       '/// check the values returned...
       MessageBox.Show("the integer x looks like this >>> " & x & Environment.NewLine & "  the integer i looks like this >>> " & i)

   End Sub

[wyrd]

Hmm.. didn't try that, no. I'll stick with what I have, it's more clear on what the code is doing and self documenting (as the actual hex value is in a file, not in the code). Thanks anyway though.