hello

i am trying to use bootstrap required="" in my code with ASP:Linkbutton but linkbutton not respond to this validation

how to use this required="" with linkbutton or if any other option because ASP:button not support my css

<div class="page-header">
</div>
<div class="page-content">
    <div class="panel border border-primary">
        <div class="panel-body container-fluid">
            <h1 class="page-title">
                Add Customer</h1>
            <div class="row row-lg">
                <div class="col-md-12">
                    <!-- Example Basic Form (Form grid) -->
                    <div class="example-wrap">
                        <h4 class="example-title">
                        </h4>
                        <div class="example">
                            <form autocomplete="off">
                            <div class="row">
                                <div class="col-md-4">
                                    <div class="form-group">
                                        <div class="form-line focused">
                                            <asp:Label ID="lblhospitalname" CssClass="label-font-bold" runat="server" Text="Firm Name"></asp:Label>
                                            <asp:TextBox ID="txthospitalname" runat="server" class="form-control" required=""></asp:TextBox>
                                            <ajaxToolkit:AutoCompleteExtender ServiceMethod="SearchHSN" MinimumPrefixLength="1"
                                                CompletionInterval="100" EnableCaching="false" CompletionSetCount="10" TargetControlID="txthospitalname"
                                                ID="AutoCompleteExtender1" runat="server" FirstRowSelected="true">
                                            </ajaxToolkit:AutoCompleteExtender>
                                        </div>
                                    </div>
                                </div>
                                <div class="col-md-4">
                                    <div class="form-group">
                                        <div class="form-line focused">
                                            <asp:Label ID="lblhospitaltype" CssClass="label-font-bold" runat="server" Text="Type Of Firm"
                                                required=""></asp:Label>
                                            <asp:DropDownList ID="drophospitaltype" data-plugin="select2" runat="server" class="form-control">
                                            </asp:DropDownList>
                                        </div>
                                    </div>
                                </div>
                                <div class="col-md-4">
                                    <div class="form-group">
                                        <div class="form-line focused">
                                            <asp:Label ID="lblhospitaladd" CssClass="label-font-bold" runat="server" Text="Firm Address"></asp:Label>
                                            <asp:TextBox ID="txthaddress" runat="server" class="form-control" required=""></asp:TextBox>
                                        </div>
                                    </div>
                                </div>
                            </div>
                            <div class="row clearfix">
                                <div class="col-md-4">
                                </div>
                                <div class="form-group form-material col-md-8">
                                    <asp:LinkButton ID="btncustomerSubmit" runat="server" CssClass="btn btn-primary m-t-15 waves-effect"
                                        OnClick="btncustomerSubmit_Click">Add</asp:LinkButton>
                                    <asp:LinkButton ID="btnReset" runat="server" CssClass="btn btn-primary m-t-15 waves-effect"
                                        OnClick="btncustomerReset_Click">Reset</asp:LinkButton>
                                </div>
                            </div>
                            </form>
                        </div>
                    </div>
                    <%--</form>--%>
                </div>
            </div>
        </div>
    </div>
</div>