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copied!<p>Assuming you're talking about the WPF Toolkit DataGrid control, you need only set <a href="http://msdn.microsoft.com/en-us/library/system.windows.controls.datagrid.canusersortcolumns(VS.100,default).aspx" rel="noreferrer">the CanUserSortColumns property</a> to true and then set <a href="http://msdn.microsoft.com/en-us/library/system.windows.controls.datagridcolumn.sortmemberpath(VS.100).aspx" rel="noreferrer">the SortMemberPath property</a> of each DataGridColumn in the DataGrid.</p> <p>As far as sorting the collection initially, you must use a CollectionViewSource and set the sort on that and then assign that as the ItemsSource of your DataGrid. If you're doing this in XAML then it would be as easy as:</p> <pre><code><Window.Resources> <CollectionViewSource x:Key="MyItemsViewSource" Source="{Binding MyItems}"> <CollectionViewSource.SortDescriptions> <scm:SortDescription PropertyName="MyPropertyName"/> </CollectionViewSource.SortDescriptions> </CollectionViewSource> </Window.Resources> <DataGrid ItemsSource="{StaticResource MyItemsViewSource}"> </DataGrid> </code></pre> <p><strong>NOTE:</strong> the "scm" namespace prefix maps to System.ComponentModel where the SortDescription class lives.</p> <pre><code>xmlns:scm="clr-namespace:System.ComponentModel;assembly=WindowsBase" </code></pre> <p><strong>EDIT:</strong> I think enough people got help from this post, that this upvoted comment should be included in this answer:</p> <p>I had to use this to get it to work:</p> <pre><code><DataGrid ItemsSource="{Binding Source={StaticResource MyItemsViewSource}}"> </code></pre>

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