Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>maulkye,</p> <p>There is something going wrong if you have to refresh your <code>ObservableCollection</code>. Usually, you should not need it because the <code>ObservableCollection</code> will notify about item changes.</p> <p>Never do this:</p> <pre><code>FruitBasket = new ObservableCollection&lt;Fruit&gt;(FruitBasket); </code></pre> <p>Your <code>public ObservableCollection&lt;Fruit&gt; FruitBasket</code> should have <strong>no public setter</strong>, it should be read only. Just <code>Add</code> or <code>Remove</code> Items to/from the list.</p> <p>If you want to handle multiple selections, you will probably need an extended <code>CollectionView</code> which can handle this, get more hints <a href="http://grokys.blogspot.com/2010/07/mvvm-and-multiple-selection-part-iii.html" rel="nofollow">here</a>.</p> <p>I hope this helps a little bit, even if I probably didn't answer all questions : )</p> <p><strong>EDIT:</strong> Ok, I guess i got some things wrong. Now i guess i fully understand what you're trying to accomplish. You are <strong>not</strong> getting notified when your property is changed, right? Well, for this reason, we've adapted "<a href="http://bindablelinq.codeplex.com" rel="nofollow">BindableLinq</a>" in one of our projects, which you can compile in Silverlight without problems. (there are similar solutions available, called <a href="http://clinq.codeplex.com/" rel="nofollow">Continuous Linq</a> or <a href="http://obtics.codeplex.com/" rel="nofollow">Obtics</a>, make your choice).</p> <p>Using <strong>BindableLinq</strong>, you can transform your <code>ObservableCollection</code> to a <code>BindableCollection</code> using one single extension method. The <code>BindableCollection</code> will then reflect all changes properly. Give it a try.</p> <p><strong>EDIT2:</strong> To implement a <strong>proper</strong> ViewModel, Please consider the following Changes.</p> <p>1) <code>Fruit</code> is your <strong>Model</strong>. Since it doesn't implement <code>INotifyPropertyChanged</code>, it won't propagate any changes. Create a <code>FruitViewModel</code>, embedding your <code>Fruit</code> Model and invoke <code>RaisePropertyChanged</code> for each property setter.</p> <p>2) Change your <code>FruitBasket</code> to be an <code>ObservableCollection</code> of <code>FruitViewModel</code>. Slowly it starts to make sense :)</p> <p>3) <code>SelectedFruit</code> has to be a <code>FruitViewModel</code> as well. Now it makes even more sense.</p> <p>4) Now it already works for me, even without <code>BindableLinq</code>. Did you have any success?</p> <p>HTH</p> <p>best regards,<br> thomas</p>
    singulars
    1. This table or related slice is empty.
    1. POMVVM Listbox Update Content Maintain Selected Item Silverlight
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USthmshd
    1. USthmshd
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POMVVM Listbox Update Content Maintain Selected Item Silverlight
      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
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. COWell, that does help, but it leaves me in the situation of not knowing how to get the bound control to update properly. Bear in mind that I am not adding or removing items (that works perfectly without the extra code). My problem occurs when I'm updating a property on one of the objects that is in the ObservableCollection.
      singulars
      1. PO
      1. USmaulkye
    2. COHmmmm, though you got me thinking. I could just remove the selected item, update it, and then add it back to get the automatic updates to work. Although I'm not sure how that will impact sorting.
      singulars
      1. PO
      1. USmaulkye
    3. COCheck my EDIT, there is another track you could follow :)
      singulars
      1. PO
      1. USthmshd
 

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