Databases
StackOverflow2013
Postsdbo
POImplementing INotifyCollectionChanged interface
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POImplementing INotifyCollectionChanged interface
    primarykey
    data
    text
    <p>I need to implement a collection with special capabilities. In addition, I want to bind this collection to a ListView, Therefore I ended up with the next code (I omitted some methods to make it shorter here in the forum):</p> <pre><code>public class myCollection&lt;T&gt; : INotifyCollectionChanged { private Collection&lt;T&gt; collection = new Collection&lt;T&gt;(); public event NotifyCollectionChangedEventHandler CollectionChanged; public void Add(T item) { collection.Insert(collection.Count, item); OnCollectionChange(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Add, item)); } protected virtual void OnCollectionChange(NotifyCollectionChangedEventArgs e) { if (CollectionChanged != null) CollectionChanged(this, e); } } </code></pre> <p>I wanted to test it with a simple data class:</p> <pre><code>public class Person { public string GivenName { get; set; } public string SurName { get; set; } } </code></pre> <p>So I created an instance of myCollection class as follows:</p> <pre><code>myCollection&lt;Person&gt; _PersonCollection = new myCollection&lt;Person&gt;(); public myCollection&lt;Person&gt; PersonCollection { get { return _PersonCollection; } } </code></pre> <p>The problem is that the ListView does not update when the collection updates although I implemented the INotifyCollectionChanged interface.</p> <p>I know that my binding is fine (in XAML) because when I use the ObservableCollecion class instead of myCollecion class like this:</p> <pre><code> ObservableCollection&lt;Person&gt; _PersonCollection = new ObservableCollection&lt;Person&gt;(); public ObservableCollection&lt;Person&gt; PersonCollection { get { return _PersonCollection; } } </code></pre> <p>the ListView updates</p> <p>What is the problem?</p>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USAhmad
    1. USlibi
    plurals
    1. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POImplementing INotifyCollectionChanged interface
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POImplementing INotifyCollectionChanged interface
      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