Avoid Page refresh

Hi I'm using the two RadDateTimePickers for start and enddates in my asp.net application. I'm implemeting the selecteddatechanged events. Because If both dates selected I will enable button.

Whenever I selected the date e开发者_Go百科very time page is refreshing. So I'm loosing the previous. result. I have placed the whole code in asp updatepanel but page result is not showing. How can I solve this?

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Check the AutoPostBackControl property to see if you are posting back.

It looks like you are trying to use a server side event.

I don't fully understand your scenario but It looks like you would be better served using a client-side event. RadDateTimePicker has OnDateSelected. On the most recent version of RadControls

 ClientEvents-OnDateSelected

you could then have both pickers run javascript to check if both pickers have a selected date.

<script type="text/javascript">

    function StartPicker_DateSelected(s, e) {
        checkDates();
    }

    function EndPicker_DateSelected(s, e) {
        checkDates();
    }

    function checkDates() {
        var start = $find('<%= startPicker.ClientID %>').get_selectedDate();
        var end = $find('<%= endPicker.ClientID %>').get_selectedDate();

        if (start && end) {
            //enable Button
            alert('button enabled');
        }

    }
</script>

    <telerik:RadDateTimePicker ID="startPicker" runat="server" ClientEvents-OnDateSelected="StartPicker_DateSelected">
    </telerik:RadDateTimePicker>
    <telerik:RadDateTimePicker ID="endPicker" runat="server" ClientEvents-OnDateSelected="EndPicker_DateSelected">
    </telerik:RadDateTimePicker>