How to avoid freezing of GUI?

Question

i have a code which is like this : ``` private void testToolStripMenuItem_Click(object sender, EventArgs e) { toolStripStatusLabel1.Text = " Device Testing..."; positive = false; clearsensors_gui(); datarec = false; cmd = 04; datarec = serialport_FT(0, 1); if (datarec) { char ab = Convert.ToChar(rec_data[1]); //MessageBox.Show("
" + ab + "
"); int cab = Convert.ToInt16(ab); int cabc1 = cab & 1; int cabc2 = cab & 2; int cabc3 = cab & 4; int cabc4 = cab & 8; int cabc5 = cab & 16; int cabc6 = cab & 32; if (cabc1 == 1) ovalShape1.FillColor = Color.Green; else ovalShape1.FillColor = Color.Red; if (cabc2 == 2) ovalShape2.FillColor = Color.Green; else ovalShape2.FillColor = Color.Red; if (cabc3 == 4) ovalShape3.FillColor = Color.Green; else ovalShape3.FillColor = Color.Red; if (cabc4 == 8) ovalShape4.FillColor = Color.Green; else ovalShape4.FillColor = Color.Red; if (cabc5 == 16) ovalShape5.FillColor = Color.Green; else ovalShape5.FillColor = Color.Red; if (cabc6 == 32) ovalShape6.FillColo…

Accepted Answer

You could do something like this:

```
toolStripStatusLabel1.Text = " Device Testing...";
positive = false;
clearsensors_gui();
datarec = false;
cmd = 04;

BackgroundWorker worker = new BackgroundWorker();

worker.DoWork += delegate(object s, DoWorkEventArgs args)
{
    // Will be run on background thread
    args.Result = serialport_FT(0, 1);
};

worker.RunWorkerCompleted += delegate(object s, RunWorkerCompletedEventArgs args)
{
    bool result = (bool)args.Result;

if (result)
    {
        // Do your UI updates here
    }
};

worker.RunWorkerAsync();
```

One improvement could be to combine `datarec` and `rec_data` as a Tuple in args.Result.

How to avoid freezing of GUI?

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