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WPF C# Tutorial – Create a space battle shooter game in Visual Studio

MainWindow Function –

This is a default function of the WPF projects. This function will load first by default so we can put our own instructions to load with it, this way when the game is debugged it will load of the default settings for this game. Below is the code inside of the main window function.

wpf c# space shooter tutorial main window function code

Start adding the code under the initialize components line. This function is reserved for the default settings for the WPF function such as rectangles, canvas and other things we need for this game to work. Under that line add our own code to it. Lets do this

gameTimer.Interval = TimeSpan.FromMilliseconds(20); this line is setting up the game timer, we want this timer to run every 20 milliseconds. This way we will have a smooth frame rate for this game.

gameTimer.Tick += gameEngine; this line is linking the game timer tick event to the game engine event we made earlier.

gameTimer.Start(); this line is starting the game timer.

MyCanvas.Focus(); this line will focus on the canvas we made in the xaml code. Without this the key down and key up function won’t be working for this game.

The lines below are setting up the background for this game. These will assigned to the main canvas so we can see the starry background on the canvas.

ImageBrush bg = new ImageBrush(); this line is creating a new image brush that will load the image we have downloaded for the background.

bg.ImageSource = new BitmapImage(new Uri(“pack://application:,,,/images/purple.png”)); image brush bg has a image source property which can be used to load the purple.png file from inside of the images folder. The new BitmapImage is allowing us to navigate to the images folder and load the purple.png file to this bg image brush.

bg.TileMode = TileMode.Tile; image brush bg has a tile mode and here we are setting up the background as a repeated tile image for the canvas. The purple.png file is a seamless texture file which means if it repeats over and over it will look seamless on the background.

bg.Viewport = new Rect(0, 0, 0.15, 0.15); this line is setting up the size for the tiles for the background. Inside the new rect we have 0,0 which is the left and top of the background that’s set to 0 and the other 0.15, 0.15 section is set up the height and width of the image.

bg.ViewportUnits = BrushMappingMode.RelativeToBoundingBox; set up the binding of this image to the binding box so it will placed next to each other on the background.

MyCanvas.Background = bg; finally assign the bg image brush to the MyCanvas background property.

Now we assign the image to the player rectangle.

ImageBrush playerImage = new ImageBrush(); we are making a new instance of an image brush class called playerImage.

playerImage.ImageSource = new BitmapImage(new Uri(“pack://application:,,,/images/player.png”)); navigate the player png same way we have done the bg image brush earlier.

player.Fill = playerImage; now assign the player image to the player rectangle using the fill property on the rectangles. This will assign the playerImage image brush to the player rectangle background. The rectangles do not have a background option so we use the fill option.

Selectable codes for the main window are below double check the code when you are entering in the main window function.

Go to the next page for key down and up function codes.




3 responses to “WPF C# Tutorial – Create a space battle shooter game in Visual Studio”

  1. Daniel Rymes says:

    Having difficulties with URI definition. The original version failed during the build. Code compiled fine after replacing with relative version: new Uri(@"../images/player.png", UriKind.Relative). However, app is breaking, because it can’t find the image in …\bin\Debug\images\purple.png.

    Wondering if the issue could be related to URI syntax of if something’s wrong with the build process (e.g. missing/wrong item csproj). Any fix suggestions?

  2. Anhar Ali says:

    Hi Daniel, you made the images folder inside the debug folder. This folder needs to be in the main application directory. In page 1 of the tutorial it shows how to make the folder inside the solutions explorer, and then you can import the images into it.

  3. David Macák says:

    Thank you for this tutorial. I am new to C# and WPF and just found your fantastic web and your tutorials. I like this style of tutorials where you actually make something useful and fun. I made this and learned a lot by writing the code myself rather than ctrl+v.

    Also after limit = 20; it gets much harder 😀

Comment on this tutorial and let us know how you got on -

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