CODEWITHSUNDEEP
c#wpfmvvm
Oleg Vazhnev
Oleg Vazhnev

Reputation: 24067

WPF DataGrid double click via commands + INotifyPropertyChanged?

I want a command in my ViewModel to be executed when DataGrid item is clicked. As a parameter I want to have corresponding row.

I've found one approach in internet but it using DependencyProperty

http://social.msdn.microsoft.com/Forums/en-US/wpf/thread/632ea875-a5b8-4d47-85b3-b30f28e0b827

I don't use DependencyProperty in my project, instead i'm using INotifyPropertyChanged. How to implement "double click in datagrid" commaind without using DependencyProperty?

Upvotes: 4

Views: 8063

Answers (4)

vidalsasoon
vidalsasoon

Reputation: 4401

xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"
...
<DataGrid SelectedItem={Binding MySelectedItem, Mode=TwoWay}>
  <i:Interaction.Triggers>
    <i:EventTrigger EventName="MouseDoubleClick">
        <i:InvokeCommandAction Command="{Binding YourCommand}" />
    </i:EventTrigger>
  </i:Interaction.Triggers>
</DataGrid>

Upvotes: 9

Rachel
Rachel

Reputation: 132558

I usually use an AttachedCommandBehavior. It's 3 class files which can be added to your project, and lets you attach commands to just about any event.

Here's an example of how it can be used:

<Style TargetType="{x:Type DataGridRow}">
    <Setter Property="local:CommandBehavior.Event" Value="MouseDoubleClick" />
    <Setter Property="local:CommandBehavior.Action" Value="{Binding MyDoubleClickCommand}" />
    <Setter Property="local:CommandBehavior.CommandParameter" Value="{Binding }" />
</Style>

Upvotes: 3

SvenG
SvenG

Reputation: 5195

You can use this code-behind snippet to identify the row that is double clicked.

In the line with the comment "//do something with the underlying data" you can get the attached ViewModel from the Grid's or row's DataContext and Invoke your Command with the row as parameter.

Upvotes: 0

Bas
Bas

Reputation: 27095

The MVVM Light Toolkit provides EventToCommand behavior, this should be able to achieve the desired behavior (you can always roll your own if you don't want to use the framework).

Upvotes: 2

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