How to convert a int to 4 byte (DWORD) hex values

[Roger Cauvin]

A graphics company requires that the byte count of a string I need to be build be included in the message sent to it. I am building the message like this..

string StartBytes = "" + (char)STX + (char)0x00 + (char)0x00 + (char)0x00 + (char)TotalByteCount + (char)Command;
string EndBytes = "" + (char)0x00 + (char)0x00 + (char)0x00 + (char)TotalByteCount + (char)ETX;
 
string SendMsg = StartBytes.Trim() + ObjectList.Trim() + EndBytes.Trim();

The four chars after the STX needs to represent the total byte count.
In documentation, they show this as ...

BC (Byte Count): Packet total size including Start Code and End Code
Transmit in DWORD (4byte) type

Ex) Packet size = 0x00001234
0x00
0x00
0x12
0x34

I am building this all as a string and using the following to convert to bytes..

byte[] bytesSendMsg = new byte[SendMsg.Length];
bytesSendMsg = ASCIIEncoding.ASCII.GetBytes(SendMsg);

SendMsg is my string that I build...

Appreciate any help any one can provide.

[Frinavale]

What exactly is the problem?
Are you experiencing errors?
Is the output not as you expect it?

-Frinny