Why jquery pop up calendar does not work before postback ?

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I am using jquery plugin for pop up calendar in asp.net page. When the page loads, it does not fires on focus event of corresponding textbox.

But, after postback the jquery calendar pop up works finely.

Please tell me the reason and solution for this.

What I have tried:

<script src="Scripts/jquery-3.1.1.js" type="text/javascript"></script>
<script src="Scripts/jquery-ui.js" type="text/javascript"></script>
<link href="Scripts/jquery-ui.css" rel="stylesheet" type="text/css" />

<script type="text/javascript">

$(document).ready(function () {
$("#txtDob").focus(function () {
$("#txtDob").datepicker({
dateFormat: "dd/mm/yy", changeMonth: true, changeYear: true
});
});
});
</script>

<asp:TextBox ID="txtDob" runat="server"></asp:TextBox>

Posted 5-Apr-17 18:11pm

jayesh_n

Updated 5-Apr-17 18:55pm

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2 solutions

Solution 1

try

<script type="text/javascript">

       $(document).ready(function () {
           $("#txtDob").datepicker({
               dateFormat: "dd/mm/yy", changeMonth: true, changeYear: true
           });
           $("#txtDob").focus();
       });
   </script>

Posted 5-Apr-17 18:54pm

Karthik_Mahalingam

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Bryian Tan · Accepted Answer · 2017-04-05T18:55:00

Solution 2

Why do you need the focus event? This should do the trick

JavaScript

<script type="text/javascript">
    $(document).ready(function () {
       // $("#txtDob").focus(function () {
            $("#txtDob").datepicker({
                dateFormat: "dd/mm/yy", changeMonth: true, changeYear: true
            });
      //  });
    });
</script>

I see maybe you want the datepicker to show on page load by set a focus on the textbox?
How to start jquery datepicker with focus - Stack Overflow[^]

Posted 5-Apr-17 18:55pm

Bryian Tan

Updated 5-Apr-17 18:58pm

v2

Comments

jayesh_n 7-Apr-17 12:48pm

Hi Bryian,

How does the above script work properly after removing focus event ? Please explain

Bryian Tan 7-Apr-17 16:42pm

I'm not sure, I'm guessing the dynamically generated datepicker didn't get initialize correctly inside the focus function event. Another trick you can do is, explicitly call the datepicker show method after the initialization.

$("#txtDob").focus(function () {
    $("#txtDob").datepicker({
        dateFormat: "dd/mm/yy", changeMonth: true, changeYear: true
    });
    $('#txtDob').datepicker('show');
});