Keeping a Div Visable after postback

I'm having issues with figuring out a way to keep a div visible after a post back.

I have a button on the form, when clicking the button a div that was style="visibility:hidden;" is set to style="visibility:visible" via java script.

Inside of this div is a asp.net Calender control, when I switch months the control posts back and the div is hidden again. How do I keep the div visible until a date is selected on the calender?

Thanks,


Bradley

If your div is built as a server control (i.e. <div id="myDiv" runat="server") then you can do a check on the page's Load event for a post back:

Code:

---

If IsPostBack Then
  'whatever checks to see if it should still be visible
End If

---

Okay I have tried to Check if the visibility is set or not on the pageload

Code:

---

        if Page.IsPostBack then
                'DCalStart is the Div id
                If DCalStart.Style.Value.Contains("visible") Then
                    DCalStart.Style.Value = "display: inline; visibility: visible;"
                Else
                    DCalStart.Style.Value = "display: none; visibility: hidden;"
                End If
        End If

---

But no matter when I check it, it always comes back as being hidden. Am I checking the wrong place?

I'd suggest monitoring progress with session variables or something similar. If the page is set to load with visibility:hidden, then that's what'll always return. Page values aren't a good thing to monitor progress with.

Well that's a funny thing, right now they are set to load with visibility set to visible, and they still show up as hidden after any post back. I'll give the Session variable a try and see if I get better results with that approach.

-Bradley

Can you show me a brief example of this or point me to a good reference of how to accomplish this? I thought I understood Session variables but I guess I don't. How do I a session variable to remember if a Div is visible or not? I understand how to access the value, but how do I set it on the client before the post back?

If it's a step-by-step operation that the user is being led through, just track how far they've come with an int or something like that.

Why use Session variables? If the Calendar control causes the Postback a Calendar event will fire. Since the user was able to click the calendar, the Div is visible. Set the style in the Calendar event...

Thanks brucevde that solution worked like I was hoping it would. I don't know why I didn't think of that. Guess I was trying to make it harder than it needed to be.

:D

-Bradley

You already have an answer but I'll post it anyway

You might want to build a simple pop up calendar control.
Pop & size it & position it. Then use window.opener.forms(0).... to set the date where you want it.

There are several examples listed on various sites, unfortunately most constipatingly (should be a word:) ) complex (or in C#)

I'll post some code if that's what your trying to do.