How to determine the number of bytes in a string

[Ole]

By converting a string in a textbox to a byte array I'll need the byte size
of the string - how to determine that?

Thanks
Ole

 

[Bruno Jouhier]

Encoding.GetByteCount(str) should do the job.

For example, if you chose the UTF8 encoding for the byte representation (the
result depends on the encoding), you can write:

int len = System.Text.Encoding.UTF8.GetByteCount(str);

Bruno

 

[Barry Kelly]

By converting a string in a textbox to a byte array I'll need the byte size
of the string - how to determine that?

What method are you using to convert? Every char in the string is two
bytes in size, so if you are just converting the chars directly and not
using any particular encoding, the answer is string.Length * 2.

However, if you are using an encoding, you can either call
Encoding.GetByteCount() or simply call one of the Encoding.GetBytes()
overloads which returns an array of the right length. E.g.:

---8<---
byte[] bytes = Encoding.UTF8.GetBytes("foo");
--->8---

-- Barry