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copied!<p>I've rarely used a <code>DataGrid</code> and know nothing about its ability to add rows, but coming from a WPF/MVVM point of view, you don't need that anyway. Generally in WPF/MVVM, we manipulate data rather than UI controls, so the solution is easy. First we <code>Bind</code> our collection of data (in whatever shape we chose) to the <code>DataGrid.ItemsSource</code> property:</p> <pre><code>public ObservableCollection<DataItem> SomeDataCollection { get; set; } ... <DataGrid ItemsSource="{Binding SomeDataCollection}" ... /> </code></pre> <p>Now, if we want to add a new item to the bottom of the <code>DataGrid</code> we can do this in the code behind/view model:</p> <pre><code>SomeDataCollection.Add(new DataItem()); </code></pre> <p>Then if we want to add a new item to the start of the collection, we can just do this:</p> <pre><code>SomeDataCollection.Insert(0, new DataItem()); </code></pre> <p>Of course, you'll need to implement the <code>INotifyPropertyChanged</code> interface in your code behind/view model to make this work, but (hopefully) you'll be doing that anyway.</p> <hr> <p>UPDATE >>></p> <p>Sorry, I misunderstood you. I found a <a href="http://msdn.microsoft.com/en-us/library/system.componentmodel.newitemplaceholderposition.aspx" rel="nofollow noreferrer"><code>NewItemPlaceholderPosition</code> Enumeration</a> on MSDN that is used by an <a href="http://msdn.microsoft.com/en-us/library/cc491085%28v=vs.110%29.aspx" rel="nofollow noreferrer"><code>ItemCollection.IEditableCollectionView.NewItemPlaceholderPosition</code> Property</a>. Unfortunately, those linked pages don't have an code examples, so I found one in the <a href="https://stackoverflow.com/questions/2314458/in-wpf-datagrid-how-to-get-the-blank-row-on-top">in wpf datagrid how to get the blank row on top?</a> post here on StackOverflow. From the answer by @woodyiii in that post:</p> <pre><code>var view = CollectionView.GetDefaultCollectionView(EmployeeList) as IEditableCollectionView; if(view!=null) view.NewItemPlaceholderPosition = NewItemPlaceholderPosition.AtBeginning; </code></pre> <p>This does mean that you'd have to use a <code>CollectionView</code> to get this to work, but it seems like the only way... the <code>NewItemPlaceholderPosition</code> Enumeration isn't used by anything apart from the various <code>CollectionView</code> classes.</p>

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