Databases
StackOverflow2013
Postsdbo
POWPF: using Commands bound in a UserControl
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POWPF: using Commands bound in a UserControl
    primarykey
    data
    text
    <p>I'm doing a sample with MVVM and have a problem with commands. I have an Article class (with ID, Name, Price, etc.), an ArticleViewModel that represents the view model, and a user control (ArticleControl) that allows to input the data for the article, with bindings to the properties of the ArticleViewModel. This user control has a biding for a save command.</p> <pre><code> &lt;UserControl.CommandBindings&gt; &lt;CommandBinding x:Name="saveCmd" Command="local:Commands.Save" CanExecute="CommandBinding_CanExecute" Executed="CommandBinding_Executed"/&gt; &lt;/UserControl.CommandBindings&gt; </code></pre> <p>This is how the command is defined:</p> <pre><code> public class Commands { private static RoutedUICommand _save; public static RoutedUICommand Save { get { return _save; } } static Commands() { InputGestureCollection saveInputs = new InputGestureCollection(); saveInputs.Add(new KeyGesture(Key.S, ModifierKeys.Control, "Ctrl+S")); _save = new RoutedUICommand( "Save", "Save", typeof(Commands), saveInputs); } } </code></pre> <p>And the command binding handlers:</p> <pre><code> private void CommandBinding_CanExecute(object sender, CanExecuteRoutedEventArgs e) { double baseprice = 0; double.TryParse(ArticleBasePrice.Text, out baseprice); e.CanExecute = !string.IsNullOrEmpty(ArticleID.Text) &amp;&amp; !string.IsNullOrEmpty(ArticleName.Text) &amp;&amp; !string.IsNullOrEmpty(ArticleDescription.Text) &amp;&amp; baseprice &gt; 0; } private void CommandBinding_Executed(object sender, ExecutedRoutedEventArgs e) { ArticleViewModel avm = (ArticleViewModel)DataContext; if (avm != null &amp;&amp; avm.Save()) { ArticleID.Text = String.Empty; ArticleName.Text = String.Empty; ArticleDescription.Text = String.Empty; ArticleBasePrice.Text = String.Empty; } } </code></pre> <p>Now, I put this user control on a window. When I hit Ctrl+S the command is executed. However, I also put a Save button on that window, next to this user control. When I click it I want to execute the same command (and I don't want to do another command binding in the window where the user control is hosted).</p> <pre><code> &lt;StackPanel&gt; &lt;local:ArticleControl x:Name="articleControl" /&gt; &lt;Button Name="btnSave" Content="Save" Width="100" HorizontalAlignment="Left" Command="{???}"/&gt; &lt;!-- what should I put here? --&gt; &lt;/StackPanel&gt; </code></pre> <p>But I do not know how to refer that saveCmd defined in the user control. I tried different things, some are completely wrong (they throw exception when running the app), some don't have any effect.</p> <pre><code>Command="{StaticResource saveCmd}" Command="{StaticResource local:ArticleControl.saveCmd}" Command="{x:Static local:Commands.Save}" </code></pre> <p>Any help is appreciated. Thank you.</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USDave Clemmer
    1. USMarius Bancila
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    3. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POWPF: using Commands bound in a UserControl
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POWPF: using Commands bound in a UserControl
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. POWPF: using Commands bound in a UserControl
      1. This table or related slice is empty.
      1. VTUpMod
    1. This table or related slice is empty.
 

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