How to perform Single click checkbox selection in WPF DataGrid?

Question

For single click DataGrid checkbox you can just put regular checkbox control inside DataGridTemplateColumn and set UpdateSourceTrigger=PropertyChanged.

<DataGridTemplateColumn.CellTemplate>
    <DataTemplate>
        <CheckBox IsChecked="{Binding Path=IsSelected, UpdateSourceTrigger=PropertyChanged}" />
    </DataTemplate>
</DataGridTemplateColumn.CellTemplate>

I solved this with the following Style:

<Style TargetType="DataGridCell">
     <Style.Triggers>
         <Trigger Property="IsMouseOver" Value="True">
             <Setter Property="IsEditing" Value="True" />
         </Trigger>
     </Style.Triggers>
 </Style>

It's of course possible to adapt this further for specific columns ...

First of, I know this is a pretty old question but I still thought I'd try and answer it.

I had the same problem a couple of days ago and came across a surprisingly short solution for it (see this blog). Basically, all you need to do is replace the DataGridCheckBoxColumn definition in your XAML with the following:

<DataGridTemplateColumn Header="MyCheckBoxColumnHeader">
    <DataGridTemplateColumn.CellTemplate>
        <DataTemplate>
            <CheckBox HorizontalAlignment="Center" VerticalAlignment="Center" IsChecked="{Binding Path=MyViewModelProperty, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" />
        </DataTemplate>
    </DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>

The upside of this solution is obvious - it's XAML-only; thus it effectively refrains your from burdening your code-behind with additional UI logic.

To make Konstantin Salavatov's answer work with AutoGenerateColumns, add an event handler to the DataGrid's AutoGeneratingColumn with the following code:

if (e.Column is DataGridCheckBoxColumn && !e.Column.IsReadOnly)
{
    var checkboxFactory = new FrameworkElementFactory(typeof(CheckBox));
    checkboxFactory.SetValue(FrameworkElement.HorizontalAlignmentProperty, HorizontalAlignment.Center);
    checkboxFactory.SetValue(FrameworkElement.VerticalAlignmentProperty, VerticalAlignment.Center);
    checkboxFactory.SetBinding(ToggleButton.IsCheckedProperty, new Binding(e.PropertyName) { UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged });

    e.Column = new DataGridTemplateColumn
        {
            Header = e.Column.Header,
            CellTemplate = new DataTemplate { VisualTree = checkboxFactory },
            SortMemberPath = e.Column.SortMemberPath
        };
}

This will make all of DataGrid's auto-generated checkbox columns be "single click" editable.