listbox的全选，反选和全不选

http://zwkufo.blog.163.com/blog/static/25882512009102334056128/

 

//全选方法一private void SelectAll(ListBox ListBox){         for (int i = 0; i < ListBox.Items.Count; i++)        {        ListBox.SelectedIndex = i;    }   }//全选方法一和全不选private void SelectAll(ListBox ListBox,bool b){        for (int i = 0; i < ListBox.Items.Count; i++)    {        ListBox.SetSelected(i, b);    }}//反选private void unSelectAll(ListBox ListBox){    bool b;        for (int i = 0; i < ListBox.Items.Count; i++)    {        b = !ListBox.GetSelected(i);        ListBox.SetSelected(i, b);    }}