winform CheckedListBox实现全选/全不选

/全选

        private void button3_Click(object sender, EventArgs e)

        {

            for (int i = 0; i < this.checkedListBox1.Items.Count; i++)

            {

                this.checkedListBox1.SetItemChecked(i, true);

            }

}

        //反选

        private void button4_Click(object sender, EventArgs e)

        {

            for (int i = 0; i < checkedListBox1.Items.Count; i++)

            {

                if (checkedListBox1.GetItemChecked(i))

                {

                    checkedListBox1.SetItemChecked(i, false);

                }

                else

                {

                    checkedListBox1.SetItemChecked(i, true);

                }

            }