如何避免冻结GUI？

Question

我有一个代码是这样的:

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("\n" + ab + "\n");
        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.FillColor = Color.Green;
        else
            ovalShape6.FillColor = Color.Red;

        toolStripStatusLabel1.Text = " Device Tested";
    }
    else
    {
        toolStripStatusLabel1.Text = "Try Again or Communication With Device Failure....";
    }
}

上面的代码是读取传感器,即datarec = serialport_FT(0,1); 功能为我提供了GUI侧的传感器输出,稍后将用红色\绿色ovalShapeX(1-6)进行描述

问题:datarec = serialport_FT(0, 1);此函数需要liltime,因此GUI冻结到那个时候如何避免这种情况？

我尝试使用后台工作程序,但是当它转到ovalShape并更改其属性时,没有得到这个整个过程也遇到了交叉线程操作错误.

我没有得到在后台使用的函数的哪个部分以及何时何地回到第一个线程

如果我必须使用线程,请帮助我使用backgroundworker或使用invoke

Answer 1

你可以这样做:

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();

一个改进可能是结合datarec并rec_data作为args.Result中的元组.