How to add a list of path to a stackpanel?

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I know how to add one Path to a StackPanel, but how can I add a List<Path> to a StackPanel?

What I have tried:

C#

foreach (var onePath in drawThisList)
 {
  myStack.Children.Add(onePath);
 }

But it is not working.

Posted 28-Apr-19 3:23am

Mazin78

Updated 28-Apr-19 6:00am

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[no name] 28-Apr-19 9:50am

Should work. You're obviously missing some "details".

phil.o 28-Apr-19 10:30am

Please define 'not working'.

Mazin78 28-Apr-19 11:03am

I get this error {"Specified Visual is already a child of another Visual or the root of a CompositionTarget."}. I traced the foreach loop, and this error happens at the second pass. I don't know how to fix it. Please notice that I am new in programming.

phil.o 28-Apr-19 11:21am

What is the type of elements in the drawThisList list?

Mazin78 28-Apr-19 14:39pm

It is:
List<path> drawThisList = new List<path>();

Mazin78 28-Apr-19 10:32am

@Gerry Schmitz I get this error {"Specified Visual is already a child of another Visual or the root of a CompositionTarget."}, and I don't know how to fix it.

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Maciej Los · Answer 1 · 2019-04-28T06:00:00

Solution 1

Seems, you're using WPF...

Check this:
wpf - Specified Visual is already a child of another Visual or the root of a CompositionTarget - Stack Overflow[^]
Specified Visual is already a child of another Visual or the root of a CompositionTarget.[^]

Good luck!

Posted 28-Apr-19 6:00am

Maciej Los

Comments

Mazin78 28-Apr-19 15:04pm

Thank you Maciej, both the solutions suggest removing previous children before adding a new one. I need to keep the old children and add new ones.

Maciej Los 28-Apr-19 15:11pm

I think you're still in Windows Forms...
I'd suggest to read these:
How to: Use the WPF Tree Visualizer - Visual Studio | Microsoft Docs[^]
Trees in WPF | Microsoft Docs[^]