Cant access any object in the playerio void

gaberilde · 2016-04-23 22:17:51

I cant access any object inside the void OnMessage(object sender, PlayerIOClient.Message m)
I can access all objects fine if the code is not in it.
this does not happen with if's

if (button_name.Text == "hi")

it only happens if you try to set any of the object proprieties.
example:

button_name.Text = "anything";

If you do that like i said this will exception will happen:

Exception thrown: 'System.InvalidOperationException' in System.Windows.Forms.dll

Additional information: Cross-thread operation not valid: Control 'button_name' accessed from a thread other than the thread it was created on.

If there is a handler for this exception, the program may be safely continued.

ewoke · 2016-04-23 22:19:07

what exactly are you trying to do

after actually reading, you cant cross thread that way, you have to invoke to change controlls

dirty fix = checkForIllegalCrossthreads = false;//can contain typos

gaberilde · 2016-04-23 22:26:34

is the void OnMessage(object sender, PlayerIOClient.Message m) accutly on a diffrent thread to say private void buttonlolao_Click(object sender, EventArgs e) ?
if so how can i make them on the same thread?

ewoke wrote:

what exactly are you trying to do
after actually reading, you cant cross thread that way, you have to invoke to change controlls
dirty fix = checkForIllegalCrossthreads = false;//can contain typos

ewoke · 2016-04-23 22:30:15

a quick and dirty fix for this is to:

CheckForIllegalCrossThreadCalls = false;
in the constructor

SirJosh3917 · 2016-04-23 23:47:46

pls no make it right

button_name.Invoke((MethodInvoker) (() => button_name.Text = "hi"));

ewoke

Xfrogman43 · 2016-04-24 00:03:26

ninjasupeatsninja wrote:

pls no make it right
button_name.Invoke((MethodInvoker) (() => button_name.Text = "hi"));

Wouldn't you have to do this for every control you're trying to change? That's kind of annoying

Tomahawk

SirJosh3917 · 2016-04-24 00:07:09

Xfrogman43 wrote:

ninjasupeatsninja wrote:
pls no make it right
button_name.Invoke((MethodInvoker) (() => button_name.Text = "hi"));
Wouldn't you have to do this for every control you're trying to change? That's kind of annoying

moar propers

den3107 · 2016-04-24 11:22:29

Method that I like to use:

MethodInvoker mi = delegate
{
     // Do GUI stuff here
};
if (InvokeRequired)
{
     BeginInvoke(mi);
}
else
{
     mi.Invoke();
}

Until you learn what exactly invoking is and what delegates are, just use this. You don't have to know what it does, just copy paste it and replace the comment with the GUI stuff.

Multithreading is a b*tch, and sadly you can't really get around it with EE bots, hence why I personally don't think that EE bots are a good place to start learning C#, since you'll just learn yourself ugly quick methods you found on the internet, and will eventually think they're good not-ugly methods of doing so.
But let's not discuss that, there're already a couple dozen other threads where that happened.

Official Everybody Edits Forums

#1 2016-04-23 22:17:51, last edited by gaberilde (2016-04-23 22:18:16)

Cant access any object in the playerio void

#2 2016-04-23 22:19:07, last edited by ewoke (2016-04-23 22:20:48)

Re: Cant access any object in the playerio void

#3 2016-04-23 22:26:34

Re: Cant access any object in the playerio void

#4 2016-04-23 22:30:15

Re: Cant access any object in the playerio void

#5 2016-04-23 23:47:46

Re: Cant access any object in the playerio void

#6 2016-04-24 00:03:26

Re: Cant access any object in the playerio void

#7 2016-04-24 00:07:09

Re: Cant access any object in the playerio void

#8 2016-04-24 11:22:29, last edited by den3107 (2016-04-24 11:23:05)

Re: Cant access any object in the playerio void

Board footer