Hi, I hope someone can help me out with this one!
Step 1: I get a struct from unmanaged code looking like this.
public unsafe struct KEY
{
public UInt16 idkey_len;
public byte* idkey;
}
I get the struct after unmanaged code has filled it with values, I can not change the unmanaged code. The byte * idkey indicates the start of a key I want to store, and the indkey_len is the length.
I observe through debugger that the first value is 96.... (where the pointer poitns to), and the length is 21.
Step 2: I work in C#, so I want to store this using other data structures.
byte[] idKey = new byte[key.idkey_len];
for (i = 0; i < idKey.Length; i++)
idKey[i] = *(key.idkey + i);
Debugging show that the resulting byte array begins with { 96, 0, 0...}, this is good, 9600 was above! Lenth of the array is 21 too.
Step 3:
I convert it to a string and store it in a .txt
foreach (byte b in idKey)
textwriter.Writ e(b);
The result begins with 9600..... Still good, the original started with 9600 as mentioned. There are 52 numbers in total.
Step 4: NOW it messes up. I want to load this and convert it back to the original struct, so first I read the numbers as a string, and I make a byte array out of it.
I use this for conversion:
System.Text.ASC IIEncoding encoding = new System.Text.ASC IIEncoding();
return encoding.GetByt es(str);
The resulting byte array have totally different numbers, respectively { 57, 54, 48 48... } and the length, well, I just set it to 21 cause I didn't know what else I could do.
In order to process it right I have to be able to reconstruct the struct mentioned in step one. That is, a byte pointer to the start of the whole thing! I don't have a way to come around it, as I said I cannot change the unmanaged code.
Please, I would GREATLY appreciate any help.
all the best
Bendik Mjaaland
3 4386 Plater 7,872
Recognized Expert Expert
0x00 is not a valid string byte and will be removed when you do string conversions. The same applies for many other byte values.
If you really want them stored as a string, store them as a HEX string:
"96 00 00 " etc
{ 57, 54, 48 48... } IS the byte values for "9600".
Thanks for answering!
But with hex string, will that really help me out? I want the result of a byte string with values {96, 0, 0, ....}, not {96, 00,....}
I am sure you know what you are talking about, if you could be more precise to someone a bit less experienced I would really appreciate it :).
PS! I also read about Base64 conversion of some kind, but when I tried Convert.FromBas e64String (or something) I got a formaterror, supposedly the length of the string must be fixed to an even number of 8! Ideas?
Thank you
Plater 7,872
Recognized Expert Expert
Ok so we need to clear things up.
You receive these byte values:
0x96 0x00 0x00
Correct?
And you wish to save them as a textual string?
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