[Solved] Button Click event called multiple times on Datepicker selection in ASP.Net

hello,

i have this code, its strange behave, when user select dates from textbox thru javascript button click even fires but its insert the data in table 3 times not sure why

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-datepicker/1.7.1/css/bootstrap-datepicker3.min.css" />
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-datepicker/1.7.1/js/bootstrap-datepicker.min.js"></script>
<script type="text/javascript">
    $(function () {
        var selectedDates = [];
        datePicker = $('[id*=txtdate]').datepicker({
            startDate: new Date(),
            minDate: 0,
            multidate: true,
            format: "mm/dd/yyyy",
            daysOfWeekHighlighted: "5,6",
            language: 'en',
            daysOfWeekDisabled: [0, 6]
        });
        datePicker.on('changeDate', function (e) {
            if (e.dates.length <= 3) {
                selectedDates = e.dates;
                setTimeout(function () {
                    document.getElementById("<%=Button1.ClientID %>").click();
                }, 3000);
            } else {
                datePicker.data('datepicker').setDates(selectedDates);
                alert('You can only select 3 dates.');
            }
        });
    });
</script>
<asp:TextBox ID="txtdate" runat="server" AutoCompleteType="Disabled" ></asp:TextBox>
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
<asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" />

            string values = txtdate.Text;
            foreach (string value in values.Split(','))
            {
                PetWalkDateTime df = new PetWalkDateTime();
                Guid id = Guid.Parse("1382f89c-fb25-4924-998a-a4277f5457a1");

                df.ServiceBookingGUIDID = id;
                df.PetWalkdate = DateTime.Parse(value.ToString());
                df.PetWalkTime = "0";
                db.PetWalkDateTimes.Add(df);
                db.SaveChanges();
                //crud(id, DateTime.Parse(value.ToString()), "0");
                //do something with individual value
                Label1.Text += value;
            }