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Asked: 2026-05-15T15:46:09+00:00

I have a wpf datagrid which is bound to an observable collection. Currently I

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I have a wpf datagrid which is bound to an observable collection.
Currently I don’t have the NewItemPlaceHolder.
How can I enable NewItemPlaceholder (an empty row in the bottom to add new rows)?
Here is how I declared my datagrid:

    <WpfToolkit:DataGrid x:Name="grid"
        ItemsSource="{Binding Path=SampleObservableCollection}" 
        HorizontalScrollBarVisibility="Hidden" SelectionMode="Single"
        CanUserAddRows="True" CanUserDeleteRows="True"
        CanUserResizeRows="False" CanUserSortColumns="False"
        CellEditEnding="grid_CellEditEnding"
        CurrentCellChanged="grid_CurrentCellChanged" 
        AutoGenerateColumns="False"
        RowHeaderWidth="17" RowHeight="25">
        <WpfToolkit:DataGrid.Columns> ...

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1 Answer

  1. Editorial Team

    Make sure that the type of the objects in the collection has a default constructor. If it does not, then the DataGrid isn’t able to create a new one for the new row.

    Also see this other StackOverflow answer.

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