首先我們用RadioButtonList控制元件，且必須包含OnSelectedIndexChanged事件和AutoPostBack=‘true’屬性，

<f:RadioItem Text="全選" Value="0" />
<f:RadioItem Text="取消全選" Value="1" />

然後在OnSelectedIndexChanged事件裡寫如下程式碼：

 　　　　if (checkboxlistName.Items[0].Selected == true)
            {
                for
 
 (int i = 0; i < checkboxlistName.Items.Count; i++)
                {
                    checkboxlistName.Items[i].Selected = true;
                }
            }
            else
            {
                for (int i = 0; i < checkboxlistName.Items.Count; i++)
                {
                    checkboxlistName.Items[i].Selected 
 
= false;
                }
            }

 ok，完成！