I am having a datetime control in sharepoint custom webpart


I want to call a js as well as server side function on date changed. I have done as above but, client side function does not execute. Can anyone help me in order to get this working wherein if a date is changed than both js on client side and onchange server side event should work.

In my case only server side is getting fired.

Thank you in advance.


3 Answers 3


Ok i got the solution to this.

I removed AutoPostBack="true" and in javascript i used __doPostBack('<%= txtUKdtofAdm.Controls[0].ClientID %>', ''); which forces a postback which inturn fires OnDateChanged="txtUKdtofAdm_OnDateChanged"

Thank You


I think you should remove the ; from the end of validateControlsUK(); and it will work. So your call should be like this: OnValueChangeClientScript="validateControlsUK()". Also, be aware, that Javascript is case sensitive. I don't know what is the function name in your javascript, but there is a difference between ValidateControlsUK and validateControlsUK. :) If that didn't work, here are some advice, how to troubleshoot: 1. You could try this line, to see if it's even a valid event you are trying to catch: OnValueChangeClientScript="javascript:alert('Date changed');" 2. If step 1 succeeds, you should put in your function, validateControlsUK, at the very beginning of it, a similar alert as above. This way you will know at least that your client side validation is triggered, but it's ill-performing for other reasons.

I hope this helped.

  • Sorry that did not work.
    – Ishan
    Commented Jul 7, 2012 at 6:27

I used like this work for me EX:

<SharePoint:DateTimeControl ID="txtstartdate" AutoPostBack="true" CssClassTextBox="h25" DateOnly="true" runat="server" OnDateChanged="dateDateBorrowed_OnDateChanged" />SharePoint:DateTimeControl CssClassTextBox="h25"  AutoPostBack="true" ID="txttodate" DateOnly="true" runat="server" OnDateChanged="dateDateBorrowed_OnDateChanged" />

CS File

protected void dateDateBorrowed_OnDateChanged(object sender, EventArgs e)
        if (txtstartdate != null)
            //lblMessage.Text = "Hello";
            if (txtstartdate.SelectedDate > txttodate.SelectedDate)
                txttodate.SelectedDate = Convert.ToDateTime(txtstartdate.SelectedDate);
            }else if(txttodate.SelectedDate < txtstartdate.SelectedDate )
                txtstartdate.SelectedDate = Convert.ToDateTime(txttodate.SelectedDate);

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