MVVMLight EventToCommand and passing event arguments
I have a mousewheel interactivity trigger on a StackPanel:
<i:Interaction.Triggers>
<i:EventTrigger EventName="MouseWheel">
<cmd:EventToCommand Command="Binding DataContext.PreviousWeekCommand, RelativeSource=RelativeSource Mode=FindAncestor, AncestorType=UserControl"
PassEventArgsToCommand="True"/>
</i:EventTrigger>
</i:Interaction.Triggers>
and it works great with the PreviousWeekCommand as follows (snippet):
_previousWeekCommand = new RelayCommand<object>(param => ShiftDays(-7), param => (true));
The PassEventArgsToCommand is there because I'm trying to switch this to a different command that will detect if the user has scrolled up or down. The problem is, after a lot of searching, I still can't figure out how to structure the command to deal with the args. Here's what I have, but it doesn't work:
_scrollWheelCommand = new RelayCommand<MouseEventArgs>(ScrollWheel, can => true);
and then this is the ScrollWheel declaration:
public void ScrollWheel(MouseEventArgs args)
Problem is, I never get to this method when I breakpoint it. I also don't know if I'm routing the arguments in the correct way.
EDIT: Oh, and I get no errors.
c# wpf xaml mvvm-light
asked Nov 12 '18 at 22:13
linus72982linus72982
7421022
add a comment |
I have a mousewheel interactivity trigger on a StackPanel:
<i:Interaction.Triggers>
<i:EventTrigger EventName="MouseWheel">
<cmd:EventToCommand Command="Binding DataContext.PreviousWeekCommand, RelativeSource=RelativeSource Mode=FindAncestor, AncestorType=UserControl"
PassEventArgsToCommand="True"/>
</i:EventTrigger>
</i:Interaction.Triggers>
and it works great with the PreviousWeekCommand as follows (snippet):
_previousWeekCommand = new RelayCommand<object>(param => ShiftDays(-7), param => (true));
The PassEventArgsToCommand is there because I'm trying to switch this to a different command that will detect if the user has scrolled up or down. The problem is, after a lot of searching, I still can't figure out how to structure the command to deal with the args. Here's what I have, but it doesn't work:
_scrollWheelCommand = new RelayCommand<MouseEventArgs>(ScrollWheel, can => true);
and then this is the ScrollWheel declaration:
public void ScrollWheel(MouseEventArgs args)
Problem is, I never get to this method when I breakpoint it. I also don't know if I'm routing the arguments in the correct way.
EDIT: Oh, and I get no errors.
c# wpf xaml mvvm-light
asked Nov 12 '18 at 22:13
linus72982linus72982
7421022
What's the difference between_previousWeekCommandand_scrollWheelCommand? Does it stop working when you change the type argument for the_previousWeekCommand?
– mm8
Nov 13 '18 at 9:23
add a comment |
I have a mousewheel interactivity trigger on a StackPanel:
<i:Interaction.Triggers>
<i:EventTrigger EventName="MouseWheel">
<cmd:EventToCommand Command="Binding DataContext.PreviousWeekCommand, RelativeSource=RelativeSource Mode=FindAncestor, AncestorType=UserControl"
PassEventArgsToCommand="True"/>
</i:EventTrigger>
</i:Interaction.Triggers>
and it works great with the PreviousWeekCommand as follows (snippet):
_previousWeekCommand = new RelayCommand<object>(param => ShiftDays(-7), param => (true));
The PassEventArgsToCommand is there because I'm trying to switch this to a different command that will detect if the user has scrolled up or down. The problem is, after a lot of searching, I still can't figure out how to structure the command to deal with the args. Here's what I have, but it doesn't work:
_scrollWheelCommand = new RelayCommand<MouseEventArgs>(ScrollWheel, can => true);
and then this is the ScrollWheel declaration:
public void ScrollWheel(MouseEventArgs args)
Problem is, I never get to this method when I breakpoint it. I also don't know if I'm routing the arguments in the correct way.
EDIT: Oh, and I get no errors.
c# wpf xaml mvvm-light
asked Nov 12 '18 at 22:13
linus72982linus72982
7421022
I have a mousewheel interactivity trigger on a StackPanel:
<i:Interaction.Triggers>
<i:EventTrigger EventName="MouseWheel">
<cmd:EventToCommand Command="Binding DataContext.PreviousWeekCommand, RelativeSource=RelativeSource Mode=FindAncestor, AncestorType=UserControl"
PassEventArgsToCommand="True"/>
</i:EventTrigger>
</i:Interaction.Triggers>
and it works great with the PreviousWeekCommand as follows (snippet):
_previousWeekCommand = new RelayCommand<object>(param => ShiftDays(-7), param => (true));
The PassEventArgsToCommand is there because I'm trying to switch this to a different command that will detect if the user has scrolled up or down. The problem is, after a lot of searching, I still can't figure out how to structure the command to deal with the args. Here's what I have, but it doesn't work:
_scrollWheelCommand = new RelayCommand<MouseEventArgs>(ScrollWheel, can => true);
and then this is the ScrollWheel declaration:
public void ScrollWheel(MouseEventArgs args)
Problem is, I never get to this method when I breakpoint it. I also don't know if I'm routing the arguments in the correct way.
EDIT: Oh, and I get no errors.
c# wpf xaml mvvm-light
c# wpf xaml mvvm-light
asked Nov 12 '18 at 22:13
linus72982linus72982
7421022
asked Nov 12 '18 at 22:13
linus72982linus72982
7421022
asked Nov 12 '18 at 22:13
linus72982linus72982
7421022
asked Nov 12 '18 at 22:13
linus72982linus72982
7421022
asked Nov 12 '18 at 22:13
linus72982linus72982
7421022
7421022
What's the difference between_previousWeekCommandand_scrollWheelCommand? Does it stop working when you change the type argument for the_previousWeekCommand?
– mm8
Nov 13 '18 at 9:23
add a comment |
What's the difference between_previousWeekCommandand_scrollWheelCommand? Does it stop working when you change the type argument for the_previousWeekCommand?
– mm8
Nov 13 '18 at 9:23
What's the difference between
_previousWeekCommand and _scrollWheelCommand? Does it stop working when you change the type argument for the _previousWeekCommand?– mm8
Nov 13 '18 at 9:23
What's the difference between
_previousWeekCommand and _scrollWheelCommand? Does it stop working when you change the type argument for the _previousWeekCommand?– mm8
Nov 13 '18 at 9:23
add a comment |
1 Answer
1
active
oldest
votes
Try using MouseWheelEventArgs instead of MouseEventArgs when declaring your RelayCommand. The Parameter type should match the event in order for that to work.
answered Nov 13 '18 at 9:07
TomerAgmon1TomerAgmon1
1258
That did it -- thanks!
– linus72982
Nov 13 '18 at 18:02
add a comment |
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1 Answer
1
active
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1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Try using MouseWheelEventArgs instead of MouseEventArgs when declaring your RelayCommand. The Parameter type should match the event in order for that to work.
answered Nov 13 '18 at 9:07
TomerAgmon1TomerAgmon1
1258
That did it -- thanks!
– linus72982
Nov 13 '18 at 18:02
add a comment |
Try using MouseWheelEventArgs instead of MouseEventArgs when declaring your RelayCommand. The Parameter type should match the event in order for that to work.
answered Nov 13 '18 at 9:07
TomerAgmon1TomerAgmon1
1258
That did it -- thanks!
– linus72982
Nov 13 '18 at 18:02
add a comment |
Try using MouseWheelEventArgs instead of MouseEventArgs when declaring your RelayCommand. The Parameter type should match the event in order for that to work.
answered Nov 13 '18 at 9:07
TomerAgmon1TomerAgmon1
1258
Try using MouseWheelEventArgs instead of MouseEventArgs when declaring your RelayCommand. The Parameter type should match the event in order for that to work.
answered Nov 13 '18 at 9:07
TomerAgmon1TomerAgmon1
1258
answered Nov 13 '18 at 9:07
TomerAgmon1TomerAgmon1
1258
answered Nov 13 '18 at 9:07
TomerAgmon1TomerAgmon1
1258
answered Nov 13 '18 at 9:07
TomerAgmon1TomerAgmon1
1258
1258
That did it -- thanks!
– linus72982
Nov 13 '18 at 18:02
add a comment |
That did it -- thanks!
– linus72982
Nov 13 '18 at 18:02
That did it -- thanks!
– linus72982
Nov 13 '18 at 18:02
That did it -- thanks!
– linus72982
Nov 13 '18 at 18:02
add a comment |
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What's the difference between
_previousWeekCommandand_scrollWheelCommand? Does it stop working when you change the type argument for the_previousWeekCommand?– mm8
Nov 13 '18 at 9:23