Why I can't update textbox.text with the received message?

[fralurbe]

My textbox text doesn't change.

private void Server_DataReceived(object sender, SimpleTCP.Message message) { textBoxReceived.Text = message.MessageString; }

[BrandonPotter]

Probably because that event is coming from another thread, and all UI updates must happen on the main thread. See this q for how to update a forms control from another thread.

http://stackoverflow.com/questions/661561/how-to-update-the-gui-from-another-thread-in-c

[fralurbe]

Thank you. Working now using this code, extracted from your link to stack overflow. private void Server_DataReceived(object sender, SimpleTCP.Message message) { ModifyText(message.MessageString); } private void ModifyText(string message) { if (textBoxRecibido.InvokeRequired) { Action a = () => ModifyText(message) ); Invoke(a); } else textBoxReceived.Text = message) ; }

[BrandonPotter]

Awesome!