Why does Calendar re-render after TimeRangeSelected event fires?

If you use TimeRangeSelectedHandling="JavaScript" it will only execute the the JavaScript defined in TimeRangeSelectedJavaScript (onTimeRangeSelected on the client side).

The server-side TimeRangeSelected event is only fired if you call dpc.timeRangeSelectedCallBack() or dpc.timeRangeSelectedPostBack() in TimeRangeSelectedJavaScript.

Dan, I am not refering to JavaScript. I have the TimeRangeSelectedHandling set to "PostBack", which is what I want it to do. My question is, why does the calendar re-render after this event is triggered? I don't understand why the postback requires the calendar to re-render instead of remaining as-is via Viewstate.

Thanks

• VG

I see.

The BeforeEventRender event is called during data binding. If you avoid calling DataBind() the ViewState will be used instead. Note that calling DataBind() on the page will cascade to children as well.

Hi Dan, I do NOT call DataBind at all. As my original post indicated, "The TimeRangeSelected event causes a textbox outside of the calendar to become visible and that's it." So essentially txtExternalTexbox.Visible = True is all that the TimeRangeSelected event handler does. No databind. No databind called from Page_Load either. I even put a breakpoint in the databinding event - it never gets hit - but the BeforeEventRender event handler DOES get hit. Do you know why the calendar would re-render when there is no databinding? Could there be any other property that might cause the calendar to re-render every time a postback occurs?

Thanks

• VG

Sorry for the confusion. You are right, it has nothing to do with DataBind().

You can see in the source code that BeforeEventRender is called from Render(). This method is called during initial page load and after every PostBack. This is how WebForms works.

The events themselves are stored in ViewState but they are always rendered.

You might be prevent Render from being called using a combination of UpdatePanels (one for DayPilotCalendar, one for the TextBox). Set UpdateMode to Conditional.

OK, I'll give that a try. Thank you for your help.