WPF Datagrid Double Click Cell MVVM Design

Question

I have a WPF application that contains a datagrid. It is bound to my List object \"Orders\" shown below.

public class OrderBlock
{
  public Settings setting;         


        

Answer 1

private void DataGrid_MouseDoubleClick(object sender, MouseButtonEventArgs eventArgs)
{
    if (sender == null) return;
    if (eventArgs.ButtonState != MouseButtonState.Pressed) return; //only react on pressed

    var dataGrid = sender as DataGrid;
    if (dataGrid == null || dataGrid.SelectedItems == null) return;

    if (dataGrid.SelectedItems.Count == 1)
    {
        var simplePension = dataGrid.SelectedItem as ISimplePension;
        if (simplePension != null)
        {
            DataFetcherHolder.DataFetcher.SelectPension(simplePension);
            Execute(EditSelectedPensionFunction);
        }
    }
}

Answer 2

Instead of double-clicking on the cell you may double-click on the grid

<DataGrid.InputBindings>
    <MouseBinding Gesture="LeftDoubleClick" 
    Command="{Binding Edit}" 
    CommandParameter="{Binding ElementName=UsersDataGrid, Path=SelectedItem}" />
</DataGrid.InputBindings>

In ViewModel

    public ICommand Edit { get; private set; }

 Edit = new RelayCommand(EditUser, x => _isAdmin);



 private static void EditUser(object usr)
    {
        if (!(usr is User))
            return;

        new UserEditorViewModel(usr as User);
    }

Answer 3

We can do this in two ways,

a) By using Dependency property b) By adding System.Windows.Interactivity.dll.

Usually I prefer second way.

step 1: Implement ICommand interface in your view model class file.

step 2: Define your Command,

public ICommand DoubleClickCommand
{
//Do your code
}

step 2: add the above said .dll into your corresponding solution's xaml file.

xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"

step 3: Inside the Datagrid tag, use the below code to implement InvokeCommandAction Class

<i:Interaction.Triggers>
       <i:EventTrigger EventName="MouseDoubleClick">
             <i:InvokeCommandAction Command="DoubleClickCommand"/>
       </i:EventTrigger>
<i:Interaction.Triggers>

That's it. Hope it helps you:)

Answer 4

I'v used the MouseDoubleClick:

    private void DataGrid_MouseDoubleClick(object sender, MouseButtonEventArgs eventArgs)
    {
        if (sender == null) return;
        if (eventArgs.ButtonState != MouseButtonState.Pressed) return; //only react on pressed

        var dataGrid = sender as DataGrid;
        if (dataGrid == null || dataGrid.SelectedItems == null) return;

        if (dataGrid.SelectedItems.Count == 1)
        {
            var simplePension = dataGrid.SelectedItem as ISimplePension;
            if (simplePension != null)
            {
                DataFetcherHolder.DataFetcher.SelectPension(simplePension);
                Execute(EditSelectedPensionFunction);
            }
        }
    }

When you double-click a data grid, the row is also selected, so I simply find the selected item and use it.