Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>Do you need to instantiate Tags?</p> <p>I'm guessing it's a null reference exception, you set your items source as Tags in your constructor, but you have not instantiated Tags.</p> <pre><code>public TagCloudControl() { Tags = new ObservableCollection&lt;Tags&gt;(); ItemsSource = Tags; ... } </code></pre> <p>Edit:</p> <p>After playing around with code... I'm thinking that Tags might not need to be a DependencyProperty. It appears you want to Bind the ItemsSource to Tags... but you could just make Tags a simple property, and in it, set the ItemsSource to the value passed in:</p> <pre><code>public TagCloudControl() { //this is now empty. } public IEnumerable&lt;Tag&gt; Tags { get { return (this.ItemsSource as IEnumerable&lt;Tag&gt;); } set { this.ItemsSource = value; } } </code></pre> <p>Also I think your Style might want to be more like this:</p> <pre><code>&lt;Style TargetType="{x:Type local:TagCloudControl}"&gt; &lt;Setter Property="ItemTemplate"&gt; &lt;Setter.Value&gt; &lt;DataTemplate DataType="{x:Type local:Tag}"&gt; &lt;TextBlock Text="{Binding Name}" FontSize="{Binding ItemCount, Converter={StaticResource CountToBrushConverter}}" Foreground="{Binding ItemCount, Converter={StaticResource CountToFontSizeConverter}}"&gt; &lt;/DataTemplate&gt; &lt;/Setter.Value&gt; &lt;/Setter&gt; &lt;Setter Property="Template"&gt; &lt;Setter.Value&gt; &lt;ControlTemplate TargetType="{x:Type local:TagCloudControl}"&gt; &lt;Grid&gt; &lt;WrapPanel Orientation="Horizontal" Margin="2" IsItemsHost="True"&gt; &lt;/WrapPanel&gt; &lt;/Grid&gt; &lt;/ControlTemplate&gt; &lt;/Setter.Value&gt; &lt;/Setter&gt; &lt;/Style&gt; </code></pre> <p>And finally, I think you might be missing ItemCount in your 'Tag' Class.</p>
    singulars
    1. This table or related slice is empty.
    1. POWPF Error: Could not create an instance of type... when creating custom control
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USScott
    1. USScott
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POWPF Error: Could not create an instance of type... when creating custom control
      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. VTAcceptedByOriginator
    1. COAh how would I do this?
      singulars
      1. PO
      1. USBen
    2. COThanks, I got the error "a new expression requires () after type"
      singulars
      1. PO
      1. USBen
    3. COYeah... I forgot the ()... I edited to update. (Also, you'll want to remove the '**'s as well). And it can't be just IEnumerable. It'd have to be a specific Type that implements IEnumerable.
      singulars
      1. PO
      1. USScott
 

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