In C#, How to convert a hexdecimal string to int?

Question

How do I convert the following string:

6F

for example, to a normal int? It's hexdecimal value.

Thanks.

See http://stackoverflow.com/questions/1214980/convert-a-single-hex-character-to-its-byte-value-in-c/1215076#1215076 — almog.ori, Aug 02 '09 at 01:43

score 11 · Answer 1 · answered Aug 02 '09 at 00:10

11

string s = "6F";
int i = Int32.Parse(s, NumberStyles.AllowHexSpecifier);
Console.WriteLine(i); // prints "111" to the console

For details on NumberStyles, see MSDN.

answered Aug 02 '09 at 00:10

jason

2

It would actually be better to use int.Parse, rather than int32. – womp Aug 02 '09 at 00:18
5

Just a style recommendation. If you're declaring your variable as "int", then you should use "int.Parse()". If you're using Int32, then use Int32.Parse(). You should really follow a standard usage, whichever one you pick. – womp Aug 02 '09 at 00:23
2

@womp, I actually prefer the style Jason used, for some reason it feels more natural it's like saying declare a primitive int and call the method Parse on Int32 class. – Pop Catalin Aug 02 '09 at 01:56

score 5 · Answer 2 · edited Aug 02 '09 at 00:42

5

 int num = Int32.Parse(strValue, System.Globalization.NumberStyles.HexNumber);

edited Aug 02 '09 at 00:42

Andreas Grech

answered Aug 02 '09 at 00:32

Travis

score 2 · Answer 3 · answered Aug 02 '09 at 01:44

2

Convert.ToInt32(stringValue,16);

Where last param is base of 16

answered Aug 02 '09 at 01:44

almog.ori

3 Answers3