C# 多选功能(checkedListBox控件)

　　　　　// 全选;

        private void btn_allSelected_Click(object sender, EventArgs e)

        {

            //this.CheckedListBox1.CheckOnClick = true;

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

            {

                this.checkedListBox1.SetItemChecked(i, true);

            }

        }

        // 全消;

        private void btn_allCancle_Click(object sender, EventArgs e)

        {

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

            {

                this.checkedListBox1.SetItemChecked(i, false);

            }

        }

        // 反选

        private void btn_Unselected_Click(object sender, EventArgs e)

        {

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

            {

                if (checkedListBox1.GetItemChecked(i))

                {

                    this.checkedListBox1.SetItemChecked(i, false);

                }

                else

                {

                    this.checkedListBox1.SetItemChecked(i, true);         

                }         

              

            }

        }