Only change a ListViewItem's Checked state if the checkbox is clicked

问题

By default, double-clicking a ListViewItem toggles its Checked state. I only want the Checked state to be changed by clicking an the item's checkbox or pressing the space bar while an item is highlighted. Is this easy to do?

回答1:

The solution involves 3 events and one state variable of type bool:

private bool inhibitAutoCheck;

private void listView1_MouseDown(object sender, MouseEventArgs e) {
    inhibitAutoCheck = true;
}

private void listView1_MouseUp(object sender, MouseEventArgs e) {
    inhibitAutoCheck = false;
}

private void listView1_ItemCheck(object sender, ItemCheckEventArgs e) {
    if (inhibitAutoCheck)
        e.NewValue = e.CurrentValue;
}

The item check enables to avoid the transition to another check state (called before the ItemChecked event). The solution is simple and sure.

To find it out I made a small test with different events:

When clicking:

1. MouseDown <------------- inhibited region
2. Click
3. MouseClick
4. MouseUp ------------->
5. ItemCheck (outside inhibited region)
6. ItemChecked

When double clicking:

1. MouseDown <------------- inhibited region
2. ItemSelectionChanged
3. SelectedIndexChanged
4. Click
5. MouseClick
6. MouseUp ------------->
7. MouseDown <------------- inhibited region
8. ItemCheck (inside inhibited region)
9. ItemActivate
10. DoubleClick
11. MouseDoubleClick
12. MouseUp ------------->

来源：https://stackoverflow.com/questions/1406887/only-change-a-listviewitems-checked-state-if-the-checkbox-is-clicked