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POWPF DataGrid is filled except when I use LINQ to filter its items
 

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  1. POWPF DataGrid is filled except when I use LINQ to filter its items
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    <p>I've got a simple WPFToolkit <code>DataGrid</code>:</p> <pre><code>&lt;Grid&gt; &lt;dg:DataGrid Name="theDataGrid"/&gt; &lt;/Grid&gt; </code></pre> <p>And in code behind a simple <code>Contact</code> class:</p> <pre><code>public class Contact { public string FirstName { get; set; } public string LastName { get; set; } public Contact(string firstName, string lastName) { this.FirstName = firstName; this.LastName = lastName; } } </code></pre> <p>In my main constructor in code behind, I build a <code>List</code> collection and bind it to my <code>DataGrid</code>:</p> <pre><code>List&lt;Contact&gt; contacts = new List&lt;Contact&gt;(); contacts.Add(new Contact("John", "Tester")); contacts.Add(new Contact("Jill", "Tester")); contacts.Add(new Contact("Joe", "Tester")); contacts.Add(new Contact("Jimmy", "Nontester")); theDataGrid.ItemsSource = contacts; </code></pre> <p>and that works fine, but if I filter these contacts with LINQ like this:</p> <pre><code>List&lt;Contact&gt; contacts = new List&lt;Contact&gt;(); contacts.Add(new Contact("John", "Tester")); contacts.Add(new Contact("Jill", "Tester")); contacts.Add(new Contact("Joe", "Tester")); contacts.Add(new Contact("Jimmy", "Nontester")); var filteredContacts = contacts.Where(contact =&gt; contact.LastName.StartsWith("T")); theDataGrid.ItemsSource = filteredContacts; </code></pre> <p>Then my <code>DataGrid</code> is populated, but the fields are all empty (!). For example, in the above case, my <code>DataGrid</code> has three rows which are all empty. Strangely when debugging, <code>filteredContacts</code> contains four items.</p> <p>How can I use LINQ to filter my custom objects AND get them to display in my <code>DataGrid</code>?</p>
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    1. USDave Clemmer
    1. USEdward Tanguay
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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.

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