CODEWITHSUNDEEP
c#arraysfunctionstructdelegates
Jamey Diepbrink
Jamey Diepbrink

Reputation: 61

using delegates in an array initialization

I'm coding a server and I've set up a TCP connection with all the clients. Now, when a Client sends a packet I check the opcode of the packet so I can process it.

At the moment, I have an OpcodeHandler struct that currently contains String name but I also want it to have a C++-typed function pointer that calls another function, so that when I create an array with the struct as type and I initialize the array like this:

opcodes = new OpcodeHandler[max_opcodes] 
{
  new OpcodeHandler("someopcodenamehere", Somefunctionname);
  // more new's..
}

That the function named in the second argument of the constructor : 'Somefunctionname' gets called when calling the function pointer. I've heard that this is possible with delegates since they behave just like function pointers in C++, but all of my tries were useless.

Upvotes: 1

Views: 775

Answers (2)

void
void

Reputation: 881

You said you have a struct OpcodeHandler that you want to create an array of.

Now I don't know what else the OpcodeHandler does, but I'll suggest something simpler:

Dictionary<string, Action<PacketData>> OpcodeHandlers = new Dictionary<string, Action<PacketData>>();

This is a dictionary of delegates.

You can add functions to it like so:

OpcodeHandlers["someopcodenamehere"] = Somefunctionname;

and call the functions like so:

OpcodeHandlers["someopcodenamehere"](packetData);


Edit:
You can also fill the Dictionary like this:

Dictionary<string, Action<PacketData>> OpcodeHandlers = new Dictionary<string, Action<PacketData>>
{
  { "functionName1", function1 },
  { "functionName2", function2 }
};

Upvotes: 1

Keith Payne
Keith Payne

Reputation: 3082

new OpcodeHandler("someopcodenamehere", packetData => 
        Somefunctionname(packetData))

Upvotes: 1

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