C#设置选项卡导致冻结

Question

每当我设置选定的选项卡

tcTabs.SelectedTab = secondTab;

整个应用程序冻结,没有任何错误消息.我怎样才能解决这个问题？

一些代码

    private void downloadThread()
    {
        WebClient wc;


        wc = new WebClient();

        lbStatus.Text = "Creating directory";
        System.IO.Directory.CreateDirectory("C:\\Program Files\\foo");

        pbMain.Value = 33;
        Thread.Sleep(1000);

        lbStatus.Text = "Downloading files";
        wc.DownloadFile("http://website.net/foo.exe", "C:\\Program Files\\foo\\foo.exe");

        Thread.Sleep(1000);
        pbMain.Value = 66;

        lbStatus.Text = "Creating shortcuts";
        appShortcutToDesktop("C:\\Program Files\\foo\\foo.exe", "foo");

        pbMain.Value = 100;
        Thread.Sleep(1000);

        tcMain.Width = 186;
        tcMain.Height = 122;
        this.Width = 186;
        this.Height = 122;

        tcMain.SelectedTab = tpName;

        while (tcMain.SelectedTab != tpAddWebsites)
            Thread.Sleep(1000);

        tcMain.Width = 218;
        tcMain.Height = 147;
        this.Width = 218;
        this.Height =  147;
    }

selectedtab设置为tpName后的应用程序图片 http://segnosis.net/screenshots/b1ktn5.png

Answer 1

如果要在线程中切换选项卡,则需要使用Form.Invoke:

void SetSecondTab()
{
    tcTabs.SelectedTab = secondTab;
}

void SwitchTabsFromThread()
{
    this.Invoke(new Action(() => { SetSecondTab(); }));
}