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Participating Frequently
September 29, 2006
Question

Using CFINPUT dateField with onChange

  • September 29, 2006
  • 10 replies
  • 10590 views
I imagine this is easy, but have tried to search here as well as Google it and have come up empty.

I have a CFINPUT dateField control that is OK when my form loads, but then I want the control to capture a new date selection from the user and update the form. I believe the onChange event is used to process this, but I don't know how to code it so that it will refresh the form using the new date and keep the user's date selection.
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    10 replies

    May 17, 2014

    Not a very elegant solution also, but it works

    Use an JavaScript onclick event in the cfform tag.

    Check if the old value is not the same as the new value and execute your code:

        <cfform name="form1" format="html" skin="haloBlue" style="display:inline;"
         onclick="if(document.getElementById('startdate').value != '' && oldval != document.getElementById('startdate').value)
         {alert('changed')}">

        <cfinput type="dateField" name="startdate" id="startdate"  style="width: 65px" mask="DD.MM.YYYY"  value="#mydate#">

        </cfform>

        <script type="text/javascript">
         var oldval = document.getElementById('startdate').value;

        </script>

    regards

    rene

    Participant
    June 7, 2012

    This may not be the most elegant solution out there, but it works okay.

    ====== Javascript Code ======

    i = 0;

    function doSubmit(caldate) {

    i++;

    if (i>1) {

    window.location = "index.cfm?caldate=" + document.getElementById('caldate').value;

         }

    }

    =====CFML Code ======

    <cfform ... typical code here ....>

    <cfinput type="datetime" id="caldate" ...typical code here .... />

    <cfajaxproxy bind="javaScript:doSubmit({caldate})">

    </cfform>

    What this does is fires doSubmit each time the form controls are touched or the value is modified.  When this happens, it will increment i.  You will fire doSubmit twice (once to open the calendar and then once when a date is actually selected).  So you want to fire when i = 2 or when i > 1.

    Inspiring
    October 20, 2006
    Why don't you just use:

    <cfinput type="date..." name="test" onchange="{_root.formfieldtochange.text=_root.test.text;}">
    <cfinput type="text" name="formfieldtochange">

    Whenever you update the datepicker, it will automatically change the value in the other field.
    August 29, 2010

    The onChange event doesn't work with cfinput type datefield using CFML in a plain HTML form.

    In Flash form and flex, the onChange event works perfectly, i.e. whenever you choose a new date, the event fires.

    In HTML form, when you choose a new date from the datefield, the event doesn't fire. You have to select the new date, then click into the textbox and hit the enter key. Then only it fires the onChange event. Very strange indeed!

    Any ideas how to get this feature working or is it a bug in CF itself?

    Thanks.

    Inspiring
    August 29, 2010

    From my reading of the HTML spec, it's not a bug, it's how the onchange event works.  The spec says:

    The onchange event occurs when a control loses the input focus and its value has been modified since gaining focus

    (My emphasis).

    (http://www.w3.org/TR/html401/interact/scripts.html#adef-onchange)

    When changing the control's value via script, the control never gets the focus, so implicitly never loses the focus, which is a prereq for the onchange event to fire.

    The same thing happens if one changes a normal form input control via script.  No event fires.

    --

    Adam

    DLAHAuthor
    Participating Frequently
    September 29, 2006
    I think I'm almost there with:
    <CFINPUT NAME="currdate"
    ONCHANGE="getURL('index2.cfm?CurrDate=' + currdate.selectedDate, '_self')"
    TYPE="datefield"
    VALUE="#newCurrDate#" />

    But it returns the value in the wrong format like:
    index2.cfm?CurrDate=Thu%20Sep%2014%2000:00:00%20GMT-0700%202000

    How do I format/simplify the "currdate.selectedDate"?
    DLAHAuthor
    Participating Frequently
    October 4, 2006
    Further to this issue, consider the following basic code that works with handling a selectedDate:

    <!--- Set initial dates.--->
    <cfparam name="Form.selectdate" default="#dateformat(now(), 'mm/dd/yyyy')#">

    <!--- Display the current date value. --->
    <cfif isDefined("Form.submitit")>
    <cfoutput><b>You selected #Form.selectDate#</b><br><br></cfoutput>
    <cfelse>
    <cfoutput><b>Form date is #Form.selectDate#</b><br><br></cfoutput>
    </cfif>

    <b>Please select a date on the calendar and click Save.</b><br>
    <br>
    <cfform name="form1" format="Flash" skin="haloBlue" width="375" height="350" >
    <cfinput type="dateField"
    name="selectdate"
    label="Initial date"
    width="100"
    value="#Form.selectdate#" >
    <cfinput type="Submit" name="submitit" value="Save" width="100">
    </cfform>

    I would like to accomplish the same thing but use onChange instead of a submit.