Hide ListView on Button Click

Question

In my asp.net 4.5 webforms, I am trying to hide a ListView on a button click.  have a LinkButton to Show/Hide the LinkView. But somw how the ListView's Visible state is not changed only, it's always visible. Here's my code :

          <asp:LinkButton runat="server" Visible="true" ID="collapseFloorList" Text="Hide" OnClick="collapseFloorList_Click"></asp:LinkButton>

        

        <asp:Panel ID="floorPanel" runat="server" >

        <asp:ListView runat="server" ID="floorList" 

             ItemType="VincitoreCRMApplication.Models.FloorPattern"

             UpdateMethod="floorList_UpdateItem" DeleteMethod="floorList_DeleteItem"

             SelectMethod="floorList_GetData" DataKeyNames="FloorPatternId" 

             Visible='<%# ShowFloorList %>' >

In Code behind, I have a Property in PAge named ShowFloorList :

        public bool ShowFloorList { get; set; }

        protected void Page_Init(object sender, EventArgs e)

        {

            if (!IsPostBack)

            {

                ShowFloorList = true;

            }

           

        }

        protected void collapseFloorList_Click(object sender, EventArgs e)

        {

            System.Diagnostics.Debug.WriteLine("COLLAPSE FLOOR BTN Click Floor List State = " + floorList.Visible + "  BTN TEXT = " + collapseFloorList.Text );

            if (collapseFloorList.Text == "Hide") // Requesting to Hide i.e. Visible to make false

            {

                System.Diagnostics.Debug.WriteLine("INSIDE HIDE");

                ShowFloorList = false;

                System.Diagnostics.Debug.WriteLine("SHOWFLOOR LIST = " + ShowFloorList);

            }

            else

                ShowFloorList = true;

            /*

            if (ShowFloorList == false)

            {

                collapseFloorList.Text = "Show";

                ShowFloorList = false;

                //floorPanel.Visible = false;

                //floorList.Visible = false;

            }

            {

                collapseFloorList.Text = "Hide";

                ShowFloorList = true;

                floorPanel.Visible = true;

                //floorList.Visible = true;

            } */

        }

Logs on Execution :

     COLLAPSE FLOOR BTN Click Floor List State = True  BTN TEXT = Hide

     INSIDE HIDE

     SHOWFLOOR LIST = False

I tried making the floorLsit directly visible to false, adding it in a panel & making panel visible, and now alos thru property but Nothing works. Also tried changing ListButton to asp:Button, but yet same results. The button click event is fired, the value of ShowFloorList property is being changed to false, but the visibility of ListView doesn't change. It is visible always.

Can you tell me why am not able to hide the Listview ??
Any help is highly appreciated.

Thanks