Object does not match target type

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4.00/5 (1 vote)

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Hi

I have a few DLLs which I'm referencing in two test applications, UEClientTest and UEServerTest. The references are UEGameClient.dll and UEGameServer.dll.

In UEClientTest and UEServerTest, there is the following method in class Main:

public void logPacket(PacketDirection direction, string name)
{
    if (InvokeRequired)
    {
        Invoke(new logPacketDelegate(logPacket), direction, name);
    }
    else
    {
        listBox1.Items.Add((direction == PacketDirection.SEND ? "To" : "From") + " client: " + name);
    }
}

private delegate void logPacketDelegate(PacketDirection direction, string name);

That method is called from UEGameClient.dll and UEGameServer.dll respectively, from another thread, hence the delegate and invocation.

The issue is that when I try to use this method, I get the error "Object does not match target type". Example usage:

main.GetType().GetMethod("logPacket").Invoke(main, PacketDirection.SEND, packet.GetType().Name);

Here, "main" is a Form parameter which is passed to this class upon construction.

What I have tried:

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Posted 3-Dec-17 14:36pm

User 13204940

Updated 4-Dec-17 1:54am

v2

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________________ 4-Dec-17 2:02am

The first stupid question:
Is the enum (?) PacketDirection defined only once? Sometimes in big projects simple things could be duplicated, and so, in run time it will not be same type.

1 solution

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User 13204940 · Accepted Answer · 2017-12-04T01:54:00

Solution 1

Solution:

Turns out there’s a weird bug with Visual Studio Professional 2017 which allowed me to build the DLLs even though they had syntax errors, which meant any project which depended on them experienced this strange error.

Several tabs from other projects opened in the wrong projects’ window, so I closed all tabs in every projects, closed all projects, reopened them and saw I had several syntax errors which the editor didn’t detect before.

Posted 4-Dec-17 1:54am

User 13204940

Comments

CHill60 4-Dec-17 8:37am

Please stop posting questions just so that you can answer them yourself.
Reputation point farming is frowned upon and can lead to your account being suspended. If these are genuine cases of you finally finding the answer out for yourself then I suggest you wait a little longer before posting here

[no name] 4-Dec-17 8:39am

I have no interest in reputation farming, nor have I ever heard of it. When I ask a question, I still try to solve the problem myself. In a few cases, I've managed to solve the problem, so I post the solution in case anyone else is having the same issue. As for your 1-star vote, I couldn't care less.

CHill60 4-Dec-17 8:51am

1. "a few cases" ... all bar one of the recent solutions I bothered to look at were your own questions, all accepted, no other solutions also accepted. It was this behaviour that led to my comment.
2. Whereas it is good that you have found a solution, other people are unlikely to have the same issue as most of your questions are very specific. The fact you are answering such a high volume of your own questions is suspect behaviour. As I said in my original comment - that behaviour is frowned upon here regardless of what you might call it.
3) The downvote here was indeed from me, although you have no way of knowing that. However, the multitude of other downvotes your solutions have already received were not from me.
4) You will note that I offered a suggestion on how you could avoid the perception of rep-point farming. That advice was offered in good faith, but it is entirely up you whether or not you heed it. I personally don't care either way

[no name] 4-Dec-17 9:00am

I have nothing to 'fear', if you could call it that, by simply answering some of my own questions. When I ask a question, it's usually because I've tried to solve it by myself for several hours prior. Even though, most of the time these are project-blocking issues, so I ask a question and carry on trying myself to maximise my chances of finding a solution. Some people ask questions without having tried, or give up once they've asked a question and hope for the best. I'm better than that, but apparently it makes you suspicious. I have 340 rep, do you really think boosting it is on my life priorities list? I literally only use this forum when I have no other choice due to how many toxic comments I get and the fact that a bot/basement-dwelling creature is consistently 1-star-voting my questions regardless how much I explain myself and prove my efforts to solve it myself. I know other people are unlikely to have the same problem, but I've always been nagged by higher-ranking members to post the solution and accept it.

[no name] 4-Dec-17 8:48am

As for "wait a little longer", I posted the question 12 hours ago. It seems you're the kind of person to believe in "guilty until proven innocent" - there's a reason that's not the way most of the world works.

CHill60 4-Dec-17 8:56am

However, you have responded to some of your other questions in less than 5 minutes. My comment was not based on a single event, rather on a build up of evidence.
And the (unamended) phrase should be "innocent unless proven guilty" - this allows for the possibility of innocence not the inevitability of guilt.

[no name] 4-Dec-17 9:02am

Yes, naturally the amount of time it takes to solve a problem varies drastically depending on a variety of factors. Perhaps it's the case that taking time away from the project to write the question gives me enough time to clear my head and therefore when I've finished writing the question, I manage to solve it relatively quickly.

[no name] 4-Dec-17 10:33am

As I've explained that I'm not rep farming and my solution was indeed accurate, care to remove the 1-star vote? That's used if the solution is inaccurate or poorly-explained.

CHill60 4-Dec-17 11:43am

AFAIK I can't remove the 1-star vote. That has already been raised in the Bugs & Sugs forum.
The 1-star vote is not used if a solution is inaccurate or poorly-explained - there is a reporting mechanism for that. The star system is there for people to express an opinion on a solution. You claim there is a weird bug in VS but do not back that up with any evidence (e.g. a link to the website where you found that information), so my opinion of your solution is poor. Someone else may come along with a different opinion and vote accordingly - it's how the system works.

[no name] 4-Dec-17 12:00pm

I know there's a bug because I've experienced it. The editor not detecting syntax errors is a bug.

Richard Deeming 5-Dec-17 11:00am

Tools ⇒ Options ⇒ Projects and Solutions ⇒ Build and Run
Make sure "On Run, when build or deployment errors occur" is set to "Do not launch".

[no name] 5-Dec-17 11:04am

Thanks, I'll make sure to have that set for the future.