string to 20 char byte array

[PeterOcean]

I have a string value such as the following 881872241251009144651431267159882071681471608600
that I have to convert to a 20 character byte array and I am completely lost.

 

[JohnYingling]

See System.Text.AsciiEncoding

using System;
using System.Text;

class ASCIIEncodingExample {
public static void Main() {
Byte[] bytes;
String chars = "ASCII Encoding Example";

ASCIIEncoding ascii = new ASCIIEncoding();

int byteCount = ascii.GetByteCount(chars.ToCharArray(), 6, 8);
bytes = new Byte[byteCount];
int bytesEncodedCount = ascii.GetBytes(chars, 6, 8, bytes, 0);

Console.WriteLine(
"{0} bytes used to encode string.", bytesEncodedCount
);

Console.Write("Encoded bytes: ");
foreach (Byte b in bytes) {
Console.Write("[{0}]", b);
}
Console.WriteLine();
}
}

[C++]
#using <mscorlib.dll>
using namespace System;
using namespace System::Text;
using namespace System::Collections;

int main()
{
Byte bytes[];
String * chars = S"ASCII Encoding Example";

ASCIIEncoding* ascii = new ASCIIEncoding();

int byteCount = ascii -> GetByteCount(chars -> ToCharArray(), 6, 8);
bytes = new Byte[byteCount];
int bytesEncodedCount = ascii -> GetBytes(chars, 6, 8, bytes, 0);

Console::WriteLine(S" {0} bytes used to encode String*.", __box(bytesEncodedCount));

Console::Write(S"Encoded bytes: ");
IEnumerator* myEnum = bytes->GetEnumerator();
while (myEnum->MoveNext())
{
Byte b = *__try_cast<Byte __gc*>(myEnum->Current);
Console::Write(S"[{0}]", __box(b));
}

Console::WriteLine();
}

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