CheckBox与CheckedBoxList结合应用

代码如下：

　　　

        private void checkBox1_CheckedChanged(object sender, EventArgs e)
        {
            if (checkBox1.Checked == true)
            {
                checkedListBox1.Visible = true;

                CheckAll(checkedListBox1);
            }
            else
            {
                checkedListBox1.Visible = false;
                CheckAllEsce(checkedListBox1);
            }

            // end block 
        }

        //全部选中方法，参数传控件名称name 属性值

        public void CheckAll(object chckList)
        {
            if (chckList.GetType().ToString() == "System.Windows.Forms.CheckedListBox")
            {
                CheckedListBox ckl = (CheckedListBox)chckList;
                for (int i = 0; i < ckl.Items.Count; i++)
                { ckl.SetItemCheckState(i, CheckState.Checked); }
            }

            // end block if 
        }

        //end mehtod block 


        //全部取选中方法，参数传控件名称name 属性值 
        public void CheckAllEsce(object chckList)
        {
            if (chckList.GetType().ToString() == "System.Windows.Forms.CheckedListBox")
            {
                CheckedListBox ckl = (CheckedListBox)chckList;
                for (int i = 0; i < ckl.Items.Count; i++)
                { ckl.SetItemCheckState(i, CheckState.Unchecked); }
            }

            // end block if 
        }

        private void button2_Click(object sender, EventArgs e)
        {   
            string strCkl = "选择信息如下:" + "\n";
            if (checkBox1.Visible == true)
            {

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

                    strCkl += checkedListBox1.CheckedItems[i].ToString() + "\n";
                }
            }

            // end block if
            MessageBox.Show(strCkl,"你选择的项有：");
        }

运行结果：