Question

I have an application page (in a SharePoint application, if that is relevant) with a JQuery datepicker widget registered:

<script type="text/javascript">
    // Create JQuery calendar
    $(document).ready(function () {
        $('#<%=TextBoxDato.ClientID %>').datepicker({ altField: "#<%=TextBoxDato.ClientID %>",
            altFormat: 'dd/mm/yy'
        });

        $.datepicker.setDefaults($.datepicker.regional['no']);
    });
</script>


<asp:TextBox ID="TextBoxDato" runat="server" />
<asp:Button ID="ButtonSubmit" runat="server" text="Do it" />

In the code-behind, on page load I add a small client-side script to validate the filename and then populate the text box with today’s date:

// Add client-side script to check for existing file names
ButtonSubmit.Attributes.Add("onclick", "javascript:return checkFile()");

// Fill date box with today's date
DateTime now = DateTime.Now;

…then, in the event handler for a click to ButtonSubmit, I try to read out the value that the user selected:

DateTime now = DateTime.Parse(TextBoxDato.Text, new CultureInfo("fr-FR"));

My problem is that when clicking ButtonSubmit, the date that the user selected seems to be ignored in the code-behind – the value of ‘now’ is always today’s date. When running a debugger, the checkFilename() JavaScript method is able to access the picked date, but the code-behind is not. Does anyone see what I’m doing wrong?

Answer 1

You say

In the code-behind, on page load I add a small client-side script to
validate the filename and then populate the text box with today’s
date:

You are settings the TextBox value with the current date on page load. Put in some extra code on the Page_Load method

VB

If Not Page.IsPostBack Then
    '' assign the textbox value here
End If

c#

if (!Page.IsPosBack) {
     // assign the textbox value here
}

Otherwise everytime you click the button, the value will reset to the page load value