Problem wiht FlowLayoutPanel - changing AutoScroll and WrapContens

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How can I control the FlowLayoutPanel that I get a horizontal scrollbar when I change WrapContents=true at runtime?

The situation:
In the FlowLayoutPanel are several equal-sized elements.
Flow Direction is TopDown.

Default is WrapContens to false, all elements are displayed below each other, and when the panel size is too small, I get a vertical scrollbar.

The task:
If the width of the FlowLayoutPanel is changed and >= 2 * element width, set WrapContents=true.

The problem:
If I set WrapContens=true at runtime, and the wrap creates more than 2 columns, I get no horizontal scrollbar.

But if WrapContens=true is set at design time, then I get the horizontal scroll bar in the running program.

Thanks for any idea.

Posted 19-Mar-14 2:21am

BlackMilan

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BlackMilan · Accepted Answer · 2014-04-07T03:42:00

Now I found a solution myself, playing around with the FlowLayoutPanel.

The AutoScroll must set to false while changing the WrapContents:

C#

this.AutoScroll = false;
this.WrapContents = this.Width >= this.Controls[0].Width * 2;
this.AutoScroll = true;

Then the correct scroll bars will be displayed.

The behavior is not documented anywhere. Very mysterious.