如何以编程方式添加用户控件

Question

I am trying to programmatically add a UserControl every time a button is clicked. The first time it works but after that I can see the number of controls increasing but not being displayed.

private void AddRecord()
    {
        StackPanel wrp = (this.Content as Grid).Children[0] as StackPanel;
        wrp.Children.Clear();
        for (int i = 0; i < m_viewModel.RecordTimeConfig.Count; i++)
        {
            wrp.Children.Add(m_viewModel.RecordTimeConfig[i]);
        } 
    }

Every time I click the button m_viewModel.RecordTimeConfig is increased. The stackpanel has no set height and width.

Answer 1

this is your problem

wrp.Children.Clear();

You're removing all the controls in your stack panel each time you press the key, so you are adding a new control but you are also removing the one that's already there.

Answer 2

I've found the problem.

It was due to the size of the user control it was larger than the size of the window.

Thank you all for your help