Inserting XAML programmatically in application

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I have this cute little astronomy program that was supposed to be a week of coding for my own pleasure; which now have become a nightmare!

I simply have a piece of XAML:

<Ellipse Canvas.Left="15.38676905655"
                Canvas.Top="11.784944134632"
                Height="5px" Width="5px" Fill="Red"
                Panel.ZIndex="-800"
                Cursor="Hand">
        <Ellipse.RenderTransform>
            <TranslateTransform X="-2" Y="-2" />
        </Ellipse.RenderTransform>
        <Ellipse.ToolTip>
            <ToolTip>
                <StackPanel>
                    <TextBlock>Proxima Centauri</TextBlock>
                    <TextBlock>-1,538676906;-1,178494413;-3,752088504</TextBlock>
                </StackPanel>
            </ToolTip>
        </Ellipse.ToolTip>
    </Ellipse>

That I want to add during runtime to the canvas "starfield". I'm getting the data from a database, (I have no intention of typing in 45'000 stars to create a starmap manually), I however have met some issues.

Adding:

<Ellipse Canvas.Left="15.38676905655" Canvas.Top="11.784944134632" Height="5px" Width="5px" Fill="Red" Panel.ZIndex="-800" Cursor="Hand"/>

Is no problem, I got 3 different ways of doing that. But its the things nested inside the "Ellipse" that's the problem.

anyone got a fix for this??

thank you!

-Frank

Posted 12-Jun-12 9:02am

Frank R. Haugen

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2 solutions

Solution 2

You can also do things in XAML, and there are cases where this is better. Maybe not in this case, but some things just do not work well programatically:

XML

string Xaml= @"<SolidColorBrush xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" Color="AliceBlue"/>;
          StringReader stringReader = new StringReader(Xaml);
          System.Xml.XmlReader xmlReader = new System.Xml.XmlTextReader(stringReader);
          Brush rslt = XamlReader.Load(xmlReader) as Brush;

Posted 12-Jun-12 10:43am

Clifford Nelson

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Steve Maier · Accepted Answer · 2012-06-12T10:10:00

What about adding all of the Ellipse programatically instead of in a xaml file? Then you can just fill in the details from the database.

C#

var tool = new StackPanel();
tool.Children.Add(new TextBlock() { Text = "Proxima Centauri" });
tool.Children.Add(new TextBlock() { Text = "-1,538676906;-1,178494413;-3,752088504" });

var star = new Ellipse
{
    Height = 5,
    Width = 5,
    Fill = Brushes.Red,
    RenderTransform = new TranslateTransform(-2, -2),
    ToolTip = tool,
    Cursor = Cursors.Hand
};
star.SetValue(Canvas.LeftProperty, 15.38676905655);
star.SetValue(Canvas.TopProperty, 11.784944134632);
star.SetValue(Canvas.ZIndexProperty, -800);

parentCanvas.Children.Add(star);