Question

Why cant I do this in wpf?

    button1Click.Content = "Hover over me";

or

    ToolTip t = new ToolTip();
    t.Content = "Something helpful";
    button1Click.Tooltip = t;

I populate my widow with populate buttons on initialization I then have a foreach loop that adds buttons like so:

     foreach (var routedEventHandler in new RoutedEventHandler[] { button1Click, button2Click, button3_Click })`

Now in this area I apply styles to the buttons all in one go like so:

public void populateButtons()
        {
            double xPos;
            double yPos;


            Random ranNum = new Random();
            foreach (var routedEventHandler in new RoutedEventHandler[] { button1Click, button2Click, button3_Click })
            {

                Button foo = new Button();



                Style buttonStyle = Window.Resources["CurvedButton"] as Style;
                int sizeValue = 100;

                foo.Width = sizeValue;
                foo.Height = sizeValue;

                xPos = ranNum.Next(200);
                yPos = ranNum.Next(250);


                foo.HorizontalAlignment = HorizontalAlignment.Left;
                foo.VerticalAlignment = VerticalAlignment.Top;
                foo.Margin = new Thickness(xPos, yPos, 0, 0);
                foo.Style = buttonStyle;

                foo.Click += routedEventHandler;

                LayoutRoot.Children.Add(foo);
            }
        }
    }
}

But when I try this:

    private void button3_Click(object sender, RoutedEventArgs e)
    {
        ((Button)sender).ToolTip = t;
    }

It only activates when a button is pressed? (Thanks @H.B)

However when I paste the tooltip code in my populate buttons:

        Random ranNum = new Random();
        foreach (var routedEventHandler in new RoutedEventHandler[] { button1Click, button2Click, button3_Click })
        {

            Button foo = new Button();
            ToolTip t = new ToolTip();
            t.Content = "Something helpful";
            foo.ToolTip = t;

It works? But the problem is that doing it this way sets all buttons with the same tooltip and or button content! which I dont want, but I cant find a way around it?

So to summarize I can either set all buttons with the same tooltip message or button content within “populateButtons()” or I can only set tooltips and button content when the button has been pressed.

Is there no method possible that can add content to a named button?

Like my initial attempt:

button1Click.Content = "Home Button";

or

button1Click.ToolTip = "Hover over me";

Why on earth cant you set content and tooltips for specific buttons on initialization?

Answer 1

If you want to go this route then you can add a handler for Loaded event:

foo.Click += routedEventHandler;
foo.Loaded += routedEventHandler;

And then you have something like:

void button2Click(object sender, RoutedEventArgs e)
    {
        if (e.RoutedEvent == FrameworkElement.LoadedEvent)
        {
            ToolTip t = new ToolTip();
            t.Content = "Something helpful";
            ((Button)sender).ToolTip = t;
            return;
        }
        //Logic for handling button clicks goes here
        MessageBox.Show("action 2");
    }