How to use jQuery datepicker as a control parameter for SqlDataSource?

I have the need to display a date in this format: dd/mm/yyyy. This is actuall开发者_运维问答y being stored in an ASP.NET textbox and being used as a control parameter for a select on the GridView. When the query is run, though, the date format should change to 'd M y' (for Oracle). It is not working. Can someone tell me what I'm doing wrong? Right now I am pushing the "new" format to a invisible label and using the label as my control param:

$(document).ready(function() {
            //datepicker for query, shown traditionally but holding an Oracle-needed format
            $('[id$=txtBeginDate]').datepicker({ minDate: -7 , altFormat: 'd M y' });
            //get alt format
            var altFormat = $('[id$=txtBeginDate]').datepicker("option", "altFormat");
            //set date to be altformat
            $('[id$=lblActualDate]').datepicker("option", "altFormat", 'd M y');
        });

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why not do the formatting on the server-side when building your Oracle query?

System.DateTime dt = DateTime.Parse(txtBeginDate.Text);
dt.ToString("dd MM yyyy")

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SqlDataSource can only use server-side asp.net controls for ControlParameters. To use your jQuery datepicker, you'll have to get a little fancy.

Put a plain Parameter and then handle the SqlDataSource's Selecting event to set the value for the parameter from the Request object (with suitable validation and formatting) by hand.