CHECKBOXLIST全选，反选，取消，设置和取值

   ///<summary>
        ///初始化CheckBoxList中哪些是选中了的
        ///</summary>
        ///<param name="checkList">CheckBoxList</param>
        ///<param name="selval">选中了的值</param>
        ///<param name="separator">分隔符</param>
        public static string SetChecked(CheckBoxList checkList, string selval, string separator)
        {
            selval = separator + selval + separator;
            for (int i = 0; i < checkList.Items.Count; i++)
            {
                checkList.Items[i].Selected = false;
                string val = separator + checkList.Items[i].Value + separator;
                if (selval.IndexOf(val) != -1)
                {
                    checkList.Items[i].Selected = true;
                    selval = selval.Replace(val, separator);
                    if (selval == separator)
                    {
                        selval += separator;
                    }
                }
            }
            selval = selval.Substring(1, selval.Length - 2);
            return selval;
        }

        ///<summary>
        ///得到CheckBoxList中选中的值
        ///</summary>
        ///<param name="checkList">CheckBoxList</param>
        ///<param name="separator">分隔符</param>
        public static string GetChecked(CheckBoxList checkList, string separator)
        {
            string selval = "";
            for (int i = 0; i < checkList.Items.Count; i++)
            {
                if (checkList.Items[i].Selected)
                {
                    selval += checkList.Items[i].Value + separator;
                }


            } if (selval.Length > 1)
            {
                selval = selval.Substring(0, selval.Length - 1);
            } return selval;
        }

        public static void FanChoose(CheckBoxList checkList)
        {
            foreach (ListItem item in checkList.Items)
            {
                if (item.Selected)
                {
                    item.Selected = false;
                }
                else
                {
                    item.Selected = true;
                }
            }
        }
        public static void QuanChoose(CheckBoxList checkList)
        {
            foreach (ListItem item in checkList.Items)
            {
                item.Selected = true;
            }
        }
        public static void CannelChoose(CheckBoxList checkList)
        {
            foreach (ListItem item in checkList.Items)
            {
                item.Selected = false;
            }
        }