asp.net全選反選並對所選擇的進行操作

html代碼

<input type="checkbox" name="nId" id="nId" value="值自己寫" class="np" />

<asp:CheckBox ID="chkall" runat="server" Text="全選" οnclick="checkAll(this.checked,'input','nId')" />
<asp:CheckBox ID="chkothers" runat="server" Text="反選" οnclick="checkOthers('input','nId')" />

 <select name="Action" id="Action">
          <option value="Pass">審覈</option>
          <option value="NoPass">取消審覈</option>
          <option value="Commend">推薦</option>
          <option value="NoCommend">取消推薦</option>
          <option value="Del">刪除</option>
        </select>

<asp:Button ID="btnSbm"  runat="server" Text="執行" OnClientClick="return confirm('確定要執行此操作？')" OnClick="btnSbm_Click" CssClass="btn" />

js全選反選

function checkAll(bool,tagname,name)
{
	var checkboxArray;checkboxArray=getElementsByName(tagname,name)
	for (var i=0;i<checkboxArray.length;i++){checkboxArray[i].checked = bool;}
}

function checkOthers(tagname,name)
{
	var checkboxArray;checkboxArray=getElementsByName(tagname,name)
	for (var i=0;i<checkboxArray.length;i++){
		if (checkboxArray[i].checked == false){
			checkboxArray[i].checked = true;
		}else if (checkboxArray[i].checked == true){
			checkboxArray[i].checked = false;
		}
	}
}

單機按鈕後臺事件代碼

        /// <summary>
        /// 執行按鈕
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        protected void btnSbm_Click(object sender, EventArgs e)
        {
            string action = Request.Form["Action"].ToString();//獲取下拉款的值
            string nid = Request.Form["nId"];//獲取所選擇的複選框

            if (nid != "" && nid != null)
            {
                string[] arr = nid.Split(",".ToCharArray());

                switch (action)
                {
                    case "Pass":
                        for (int i = 0; i < arr.Length; i++)
                        {
                            所要執行的操作;
                        }
                        break;
                    case "NoPass":
                        for (int i = 0; i < arr.Length; i++)
                        {
                            所要執行的操作;
                        }
                        break;
                    case "Commend":
                        for (int i = 0; i < arr.Length; i++)
                        {
                            所要執行的操作;
                        }
                        break;
                    case "NoCommend":
                        for (int i = 0; i < arr.Length; i++)
                        {
                            所要執行的操作;
                        }
                        break;
                    case "Del":
                        for (int i = 0; i < arr.Length; i++)
                        {
                            所要執行的操作;
                        }
                        break;
                }
            }
        }