以静态方法获取项目CheckState-GetitemCheckStateinastaticmethod

I made an extension method to swap places of two items in a CheckedListBox. The method is put in a static Utilities class. The problem is that the CheckState doesn't travel. So if I move a checked item up in the list, the checkbox state will stay and the moved item will take over the CheckState from the item it's replacing.

我做了一个扩展方法来交换CheckedListBox中两个项目的位置。该方法放在静态Utilities类中。问题是CheckState不会移动。因此，如果我在列表中移动已检查的项目，则复选框状态将保留，移动的项目将从其替换的项目接管CheckState。

My code looks like this:

我的代码如下所示：

public static System.Windows.Forms.CheckedListBox.ObjectCollection Swap(this System.Windows.Forms.CheckedListBox.ObjectCollection lstBoxItems, int indexA, int indexB)
{
    if (indexB > -1 && indexB 

public static System.Windows.Forms.CheckedListBox.ObjectCollection Swap(this System.Windows.Forms.CheckedListBox.ObjectCollection lstBoxItems, int indexA, int indexB)
{
    if (indexB > -1 && indexB 

myCheckedListBox.Items.Swap(selectedIndex, targetIndex);

public static System.Windows.Forms.CheckedListBox Swap(this System.Windows.Forms.CheckedListBox listBox, int indexA, int indexB)
{
    var lstBoxItems = listBox.Items;
    if (indexB > -1 && indexB 

myCheckedListBox.Swap(selectedIndex, targetIndex);