Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>Ok. Delete all your code and start all over.</p> <p>The default approach to WPF (regardless of the application type, a game in this case) is something called <a href="https://stackoverflow.com/questions/14381402/wpf-programming-methodology/14382137#14382137">MVVM</a> which I will go as far as to say you must learn before you ever write a single line of code or XAML in WPF.</p> <p>This is my take on what you described:</p> <pre><code>&lt;Window x:Class="MiscSamples.WhackAMole" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="WhackAMole" Height="300" Width="300"&gt; &lt;ItemsControl ItemsSource="{Binding Moles}"&gt; &lt;ItemsControl.ItemsPanel&gt; &lt;ItemsPanelTemplate&gt; &lt;UniformGrid Rows="3" Columns="3" IsItemsHost="True"/&gt; &lt;/ItemsPanelTemplate&gt; &lt;/ItemsControl.ItemsPanel&gt; &lt;ItemsControl.ItemTemplate&gt; &lt;DataTemplate&gt; &lt;Image x:Name="Mole" Height="0" Width="100" Source="/Images/Mole.Png" Stretch="Fill" VerticalAlignment="Bottom"/&gt; &lt;DataTemplate.Triggers&gt; &lt;DataTrigger Binding="{Binding IsUp}" Value="True"&gt; &lt;DataTrigger.EnterActions&gt; &lt;BeginStoryboard&gt; &lt;Storyboard TargetName="Mole"&gt; &lt;DoubleAnimation Storyboard.TargetProperty="Height" From="0" To="77" Duration="00:00:00.3"/&gt; &lt;/Storyboard&gt; &lt;/BeginStoryboard&gt; &lt;/DataTrigger.EnterActions&gt; &lt;DataTrigger.ExitActions&gt; &lt;BeginStoryboard&gt; &lt;Storyboard TargetName="Mole"&gt; &lt;DoubleAnimation Storyboard.TargetProperty="Height" From="77" To="0" Duration="00:00:00.3"/&gt; &lt;/Storyboard&gt; &lt;/BeginStoryboard&gt; &lt;/DataTrigger.ExitActions&gt; &lt;/DataTrigger&gt; &lt;/DataTemplate.Triggers&gt; &lt;/DataTemplate&gt; &lt;/ItemsControl.ItemTemplate&gt; &lt;/ItemsControl&gt; &lt;/Window&gt; </code></pre> <p>Code Behind:</p> <pre><code>public partial class WhackAMole : Window { public WhackAMole() { InitializeComponent(); DataContext = new WhackAMoleViewModel(); } } </code></pre> <p>ViewModel:</p> <pre><code>public class WhackAMoleViewModel: PropertyChangedBase { private List&lt;Mole&gt; _moles; public List&lt;Mole&gt; Moles { get { return _moles; } } private System.Threading.Timer timer; private System.Random random = new Random(); public WhackAMoleViewModel() { _moles = Enumerable.Range(1, 9).Select(x =&gt; new Mole()).ToList(); timer = new Timer(x =&gt; RaiseRandomMole(), null, 0, 300); } private void RaiseRandomMole() { //If random number is less than 5 skip this iteration if (random.Next(1, 10) &gt; 5) return; //Choose a random mole var mole = Moles[random.Next(0, 8)]; //If it's already raised, do nothing if (mole.IsUp) return; //Raise it mole.IsUp = true; //Then Get it down somewhere between 1 and 2 seconds after Task.Factory.StartNew(() =&gt; Thread.Sleep(random.Next(1000, 2000))) .ContinueWith(x =&gt; mole.IsUp = false); } } </code></pre> <p>Data Item:</p> <pre><code>public class Mole: PropertyChangedBase { private bool _isUp; public bool IsUp { get { return _isUp; } set { _isUp = value; OnPropertyChanged("IsUp"); } } } </code></pre> <p>PropertyChangedBase class (MVVM helper):</p> <pre><code>public class PropertyChangedBase:INotifyPropertyChanged { public event PropertyChangedEventHandler PropertyChanged; protected virtual void OnPropertyChanged(string propertyName) { Application.Current.Dispatcher.BeginInvoke((Action) (() =&gt; { PropertyChangedEventHandler handler = PropertyChanged; if (handler != null) handler(this, new PropertyChangedEventArgs(propertyName)); })); } } </code></pre> <p>Result:</p> <p><img src="https://i.stack.imgur.com/XAi79.png" alt="enter image description here"></p> <ul> <li>Notice that I'm using WPF's animations capabitilites to show / hide the moles.</li> <li>Also notice that there's not a single line of code in my example that references or manipulates any UI elements. The UI is done in XAML and it reacts to changes in the model / ViewModel via <a href="http://msdn.microsoft.com/en-us/library/ms752347.aspx" rel="nofollow noreferrer">DataBinding</a></li> <li>I made a basic example, it doesn't support clicking on the moles, you will have to use a <a href="http://wpftutorial.net/DelegateCommand.html" rel="nofollow noreferrer"><code>DelegateCommand</code></a> for that.</li> <li>Build on my example and follow my logic (which is the right one). Don't manipulate UI elements in code.</li> </ul>
    singulars
    1. This table or related slice is empty.
    1. POImages in Stack Panel not being Displayed
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USCommunity
    1. USFederico Berasategui
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POImages in Stack Panel not being Displayed
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTAcceptedByOriginator
    1. COWow, thank you so much for doing this, you are AMAZING!
      singulars
      1. PO
      1. USAndrew
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload