C# udp packet based on a structure

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Hello

I want to send a data to the printer via udp port. I have a structure of that udp packet but have no idea how to build it.

The structure

Does anyone have an idea?

What I have tried:

UdpClient udpClient = new UdpClient();
            udpClient.Connect("192.168.0.99", 47545);
            Byte[] senddata = Encoding.ASCII.GetBytes("id_val_operation_acquire_records2");
            udpClient.Send(senddata, senddata.Length);

Posted 8-Mar-17 3:25am

Member 13046160

Updated 8-Mar-17 3:42am

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Jochen Arndt · Answer 1 · 2017-03-08T03:42:00

Create a C# structure that corresponds to the structure definition. This structure must not contain padding bytes (Pack = 1) and use members with fixed width (use byte, UInt16, UInt32 according to the length of the fields). See StructLayoutAttribute.Pack Field (System.Runtime.InteropServices)[^].

Then create an instance of this structure, fill it, and send it. Sending requires converting the structure to a byte array which is a common task; just search for "c# structure to byte array".