多线程更新UI 武胜

private delegate object GetButtonTagDelegate(ref Button b);

private object GetButtonTag(ref Button b)
        {
            if (InvokeRequired)
            {
                return Invoke(new GetButtonTagDelegate(GetButtonTag), new object[] {b});
            }

            return b.Tag;
        }

private delegate int GetComboBoxSelectedIndexDelegate(ref ComboBox cb);

private int GetComboBoxSelectedIndex(ref ComboBox cb)
        {
            if (InvokeRequired)
            {
                return (int) Invoke(new GetComboBoxSelectedIndexDelegate(GetComboBoxSelectedIndex), new object[] {cb});
            }

            return cb.SelectedIndex;
        }

private delegate void ButtonPerformClickDelegate(ref Button b);

private void ButtonPerformClick(ref Button b)
        {
            if (InvokeRequired)
            {
                Invoke(new ButtonPerformClickDelegate(ButtonPerformClick), new object[] {b});
            }
            else
            {
                b.PerformClick();
            }
        }

private delegate void UpdateCountdownProgressBarDelegate(ref ProgressBar pb, int delay, int elapsed);

private void UpdateCountdownProgressBar(ref ProgressBar pb, int delay, int elapsed)
        {
            if (InvokeRequired)
            {
                Invoke(new UpdateCountdownProgressBarDelegate(UpdateCountdownProgressBar), new object[] {pb, delay, elapsed});
            }
            else
            {
                pb.Minimum = 0;
                pb.Maximum = delay;

                if (elapsed < delay)
                {
                    pb.Value = delay - elapsed;
                }
                else
                {
                    pb.Value = 0;
                }
            }
        }

private delegate bool GetCheckBoxCheckedDelegate(ref CheckBox cb);

private bool GetCheckBoxChecked(ref CheckBox cb)
        {
            if (InvokeRequired)
            {
                return Convert.ToBoolean(Invoke(new GetCheckBoxCheckedDelegate(GetCheckBoxChecked), new object[] {cb}));
            }

            return cb.Checked;
        }

private delegate void AddComboBoxItemDelegate(ref ComboBox cb, string item);

private void AddComboBoxItem(ref ComboBox cb, string item)
        {
            if (InvokeRequired)
            {
                Invoke(new AddComboBoxItemDelegate(AddComboBoxItem), new object[] {cb, item});
            }
            else
            {
                cb.Items.Add(item);
            }
        }