自定义控件未更新C＃

Question

I cannot for the life of me get a custom control updating itself. In the below example, "test label1" works and outputs as expected. However when I try and get it to do the same thing later on, it will not. I've tried calling Update and Invalidate, but still nothing. Am I missing something?

Swapping the points around doesn't work either, so it doesn't look like it's just off screen for example.

public partial class AdvancedListControl : UserControl
{
    public void createAnotherLabel()
    {
        Controls.Add(new Label { Location = new Point(14, 14), AutoSize = true, Text = "test label2 - test" }); // this won't create
        // me.Controls.Add(new Label { Location = new Point(14, 14), AutoSize = true, Text = "test label2 - test" });
        // Update();
        // Invalidate();
    }

    private AdvancedListControl me;

    public AdvancedListControl()
    {
        InitializeComponent();

        me = this;
        Controls.Add(new Label { Location = new Point(26, 26), AutoSize = true, Text = "test label1" });
    }
}

Thanks.

Answer 1

该控制方法必须由最终用户操作（如按钮的事件处理程序）驱动的控件调用，从而导致页面回发，这将导致该控件触发该方法并以更新控件状态呈现页面。

Answer 2

Meh! Noob mistake. I did the same as Jashaszun and created a new project, and yes it did work. Turns out I had two copies of the advanced control on a form, and the one that was hiding was the one I was hitting. It's been a long day. ;-)