Show Hide Label on Bootstrap DropDownList selection using jQuery in ASP.Net

Hi nedash,

Check this example. Now please take its reference and correct your code.

HTML

<div class="dropdown">
    <button class="btn btn-secondary dropdown-toggle" type="button" id="dropdownMenuButton"
        data-toggle="dropdown" aria-haspopup="true" aria-expanded="false" style="width: 190px !important;">
        متراژ را انتخاب نمایید
    </button>
    <div class="dropdown-menu" aria-labelledby="dropdownMenuButton">
        <asp:Repeater ID="Rmetraj" runat="server">
            <ItemTemplate>
                <li><a target="_blank" class="dropdown-item" id="btnsystem" runat="server" commandargument='<%# Eval("metraj") %>'>
                    <%# Eval("metraj") %></a></li>
            </ItemTemplate>
        </asp:Repeater>
    </div>
</div>
<br />
<asp:Label ID="TH5L1L" runat="server" Text="TH5L1L" /><br />
<asp:Label ID="TH5L1LA" runat="server" Text="TH5L1LA" /><br />
<asp:Label ID="TH5L1LP" runat="server" Text="TH5L1LP" />
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.2/css/bootstrap.min.css" />
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<script type="text/javascript" src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.2/js/bootstrap.min.js"></script>
<script type="text/javascript">
    $(function () {
        $('.dropdown-menu a').click(function () {
            $('#TH5L1L').show();
            $('#TH5L1LA').show();
            $('#TH5L1LP').show();
            var metraj = $.trim($(this).html());
            switch (metraj) {
                case "Sell":
                case "Rent":
                    $('#TH5L1L').hide();
                    $('#TH5L1LA').hide();
                    break;
                case "Buy":
                    $('#TH5L1LP').hide();
                    break;
                default:
            }
        });
    });
</script>

Code

C#

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        System.Data.DataTable dt = new System.Data.DataTable();
        dt.Columns.AddRange(new System.Data.DataColumn[] { new System.Data.DataColumn("metraj") });
        dt.Rows.Add("Sell");
        dt.Rows.Add("Rent");
        dt.Rows.Add("Buy");
        Rmetraj.DataSource = dt;
        Rmetraj.DataBind();
    }
}

VB.Net

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
    If Not Me.IsPostBack Then
        Dim dt As System.Data.DataTable = New System.Data.DataTable()
        dt.Columns.AddRange(New System.Data.DataColumn() {New System.Data.DataColumn("metraj")})
        dt.Rows.Add("Sell")
        dt.Rows.Add("Rent")
        dt.Rows.Add("Buy")
        Rmetraj.DataSource = dt
        Rmetraj.DataBind()
    End If
End Sub

Screenshot