Thread-safe calls to windows forms controls c#

Good article Donsw 2-Dec This is a good article, Although the portnames does show all the ports, when you try to open them they may not be valid, There must be an issue with what names are there and if they really do exists. Also I have a virtual com4 for my RIM it can not be opened.

But overall a good article. Dear sir when I try to open port in vb. Help me please! I start in C. I used the demo to communicate with another PC serial port. Have you idea on what is happening? Re: failed receiving data j.

How to update form easliy after received data? How to design the delegate callback function if I have many controls need to be update after receive data form rs ? Re: How to update form easliy after received data? Cant get recieve event to fire in vb. I have search internet for several weaks trying programs written in vb. Most of them use timers or just a user event to read port.

Im working with a PLC that return a packet in responce to packet sent. Can you help me I would like to use the new serial port control kingkhong gmail. NET issue or not an issue please comment sanong 1-Jul I have implemented serial. It seems that when I minimized application to trayicon,it seem to be slow to receive data, compare to when we open application.

Q: When minimize, Call back function such as "DataReceieved" will get effected? Closing Form bbivans Apr When I close this program using the Close Box X , it hangs. I've tried closing the port using Form Closing Event. It still locks up. Hello, i was using this program for testing and it's not working. When I send data throught null modem cable to another computer I am only getting zeros three zeroes per one letter on transmiter side. The BackgroundWorker component uses an event-driven model for multithreading.

Programming Windows Forms user interfaces is quite straightforward as long as you do not use multiple threads. But whenever your application has some actual work to do, it it becomes necessary to use threading to ensure the responsiveness of the UI. This is where Windows Forms programming can get quite complex. Access to Windows Forms controls is not inherently thread safe.

If you have two or more threads manipulating the state of a control, it is possible to force the control into an inconsistent state.

Other thread-related bugs are possible, such as race conditions and deadlocks. It is important to make sure that access to your controls is performed in a thread-safe way.

As you know, Windows Forms is not thread safe in general. For example, it is not safe to get or set a property on a Windows. Forms control from any thread except the thread that handles the message queue. It is absolutely essential that you only make modifications to your Windows Forms controls from the message queue thread.

A simple example of using this is to create a new form, add a textbox and a button to it. Call the textbox myTextBox. At the top of the code file add another using statement for the threading library. ThreadProcUnsafe ; th. Start ; myTextBox. Now add this code to the form:. Sleep ; this. The complete form1. Threading; using System. I have no experience with threads on C.

Can you show me how to apply it in my case? Add a comment. Active Oldest Votes. You need to use Invoke method in order to execute the code in UI thread: button. Start ;. Improve this answer. Mehrzad Chehraz Mehrzad Chehraz 5, 2 2 gold badges 15 15 silver badges 26 26 bronze badges. Sign up or log in Sign up using Google.

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