Panel Autoscroll not working

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In my C# 4.0 Forms program I am trying to approximate a list box with labels and buttons on each item.
I am using a main panel, with autoscroll = true, and programmatically adding sub panels to the main panel.
The sub panels are almost as wide as the main panel and located below each other so that the vertical scroll is used to see all the sub panels (like a list box).
Each time the main panel is shown (visibility = true) the Panel.Contols.Clear function is called then sub panels are added as needed. This works fine the first time!
Problem is if the main panel is scrolled down at all when its visibility is set to false next time the main panel is shown the sub panels that were scrolled off the top will not show.
I have tried setting autoscroll to false then back to true.

Chris

Posted 11-Feb-14 7:54am

Running Fool

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Dave Kreskowiak · Answer 1 · 2014-02-11T08:22:00

Solution 1

As far as I can see, Autoscroll has nothing to do with this.

Try enumerating the Controls collection and setting the Visible property on all the sub-panels to True.

Posted 11-Feb-14 8:22am

Dave Kreskowiak

Running Fool · Answer 2 · 2014-02-13T01:50:00

I added setting Vericalscroll.Value = 0
So code goes something like this.

myScrollablePanel.Vericalscroll.Value = 0; // this is the fix
myScrollablePanel.Controls.Clear();
for(...)
{
...
myScrollablePanel.Controls.Add(m_MySubPanels[i]);
...
}

Now always shows top of myScrollablePanel, the vertical scroll if appropriate and my upper sub panels

Note: Each time myScrollablePanel is made visible it has a new set of controls on it.

Thanks
Chris