CODEWITHSUNDEEP
c#multithreadingbackgrounduser-controls
Luke Zhang
Luke Zhang

Reputation: 343

c# Background thread gets an error when run in UserControl

Right now in my UserControl, I have a button click event that starts a thread. I've since moved on from using Abort(), and trying to convert my thread to a background process so that they shut down when I close the parent form. My code is:

public Thread t;
private void btnInitiate_Click(object sender, EventArgs e)
    {
        UDPListener myListiner = new UDPListener(this);
        t.IsBackground = true;
        t = new Thread(() => myListiner.SpreadValue(myCurrentPort, firstTicker, secondTicker, myBeta));
        t.Start();
    }

But when I run the application, I get an error from t.IsBackground=true where it says "Object reference not set to an instance of an object". I'm wondering where I am going wrong in this case.

Upvotes: 1

Views: 106

Answers (1)

MaKCbIMKo
MaKCbIMKo

Reputation: 2820

You just need to change row order in your code:

...
t = new Thread(() => myListiner.SpreadValue(myCurrentPort, firstTicker, secondTicker, myBeta));
t.IsBackground = true;
...

Because you need to instantiate your thread and only then use it.

Upvotes: 1

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