Easy Hex string "0x1234" to integer conversion?

[Ed Sutton]

Is there an easy conversion from a hex string, for example "0x1234" to an
int?

I have written my own many times in other languages, I was just wondering if
there might be something already available for doing this.

-Ed

[Drebin]

Off the top of my head, couldn't you do this:

int intMyVal = int.Parse(0x1234);

?

"Ed Sutton" <es*****@nomadics.com> wrote in message
news:u3**************@TK2MSFTNGP11.phx.gbl...

Is there an easy conversion from a hex string, for example "0x1234" to an
int?

I have written my own many times in other languages, I was just wondering if there might be something already available for doing this.

-Ed

[Lars Hansen]

Maybe something like this?

System.Int32.Parse(hexString, System.Globalization.NumberStyles.HexNumber)

Lars

"Ed Sutton" <es*****@nomadics.com> skrev i en meddelelse
news:u3**************@TK2MSFTNGP11.phx.gbl...

Is there an easy conversion from a hex string, for example "0x1234" to an
int?

I have written my own many times in other languages, I was just wondering if there might be something already available for doing this.

-Ed

[Ed Sutton]

Thanks Lars!

Maybe something like this?

System.Int32.Parse(hexString,
System.Globalization.NumberStyles.HexNumber)

This threw an exception until I read that it did not support the "0x"
prefix.
hexString="55AA00" works great!

Thanks again,

-Ed

[Ed Sutton]

Thank you Otis. Very good.

Here is the answer:
uint i = Convert.ToUInt32("0xabc", 16);

So now I have two methods to convert a hex string to an int:

1 - The Convert class supports an optional "0x" or "0X" prefix. For
example, it will convert "0x64", "0X64", and "64" to decimal value of 100.
It does not tolerate leading or trailing white-space.

2 - The System.Int32.Parse approach tolerates white-space, but does not
support the "0x" or "0X" prefix. This approach will convert "64", " 64",
and "64 " to decimal value of 100.

So with C#, I can use the Convert class in conjunction with a string Trim.
I no longer have any reason to write my own hexString-to-int functions.

uint i = Convert.ToUInt32(hexString.Trim(), 16);

Thanks again!

-Ed