Adding Command to Checkbox in listview xamarin

Question

I have a listview in Xamarin forms and I am trying to get a checkbox in each row with a command attached to it.

I have tried some things but nothing worked out yet, because I can't get the binded ID with it.

The things that I have already tried are:

Adding a CheckedChanged parameter to the checkbox, I can only get true or false, but not the item this is about.

<CheckBox VerticalOptions="End" x:Name="Checkbox" IsChecked="{Binding IsBought, Mode=TwoWay}" WidthRequest="100" CheckedChanged="Checkbox_CheckedChanged"/>

Tried with GestureRecognizers with CommandParameter, this won't even call the function attached to it. I tried this with Tapped and Command, maybe I need to do the command with Binding?

<CheckBox VerticalOptions="End" x:Name="Checkbox" IsChecked="{Binding IsBought, Mode=TwoWay}" WidthRequest="100" CheckedChanged="Checkbox_CheckedChanged">
  <CheckBox.GestureRecognizers>
    <TapGestureRecognizer Command="TapGestureRecognizer_Tapped" CommandParameter="{Binding ArtikelID}"/>
  </CheckBox.GestureRecognizers>
</CheckBox>

I hope you can help me further :) Have a nice day

Jason · Accepted Answer · 2020-05-23 16:42:58Z

6

use the sender's BindingContext

void OnCheckBoxCheckedChanged(object sender, CheckedChangedEventArgs e)
{
    var cb = (CheckBox)sender;
    var item = (MyModel)cb.BindingContext;
    var id = item.ArtikelID;
}

answered May 23, 2020 at 16:42

Jason

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1 Comment

Jasper B Over a year ago

Instead of MyModel I had to put the class that the list uses. Thanks!

Grigor Yeghiazaryan · Accepted Answer · 2020-05-23 17:47:51Z

0

As I understand you have a command property in your ViewModel, and you want to bind every checkBox's command to that command in ViewModel, and pass the item as parameter.

In your case you have to specify the DataContext for that binding, as it is pointing to the item in that list.

Use RelativeSource to solve your problem.

answered May 23, 2020 at 17:47

Grigor Yeghiazaryan

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