send selected item as parameter to method in view-model [WPF,Caliburn]

Question

I have this problem. I use caliburn micro in WPF. In view I have listbox, and I bind on event MouseDoubleClick method in view-model. I would like send as parameter selected listbox item. But I don’t know how do it.

in view I have this:

    <ListBox Name="Friends" 
             SelectedItem="Key"
             Style="{DynamicResource friendsListStyle}"
             Grid.Row="2" 
             Margin="4,4,4,4"

             Micro:Message.Attach="[MouseDoubleClick]=[Action SendRp(Key)]"

             PreviewMouseRightButtonUp="ListBox_PreviewMouseRightButtonUp"
             PreviewMouseRightButtonDown="ListBox_PreviewMouseRightButtonDown" 
             MouseRightButtonDown="FriendsListBoxMouseRightButtonDown"/>

In view model I have this method:

    public void SendRp(string key)
    {
        MessageBox.Show(key);
    }

Any advance, thank.

thumbmunkeys · Accepted Answer · 2021-04-29T09:26:25.267

6

I dont know much about caliburn but my guess is you have to write

Micro:Message.Attach="[MouseDoubleClick]=[Action SendRp(Friends.SelectedItem)]"

also you should either omit the SelectedItem="Key" or use a binding to your ViewModel like this:

SelectedItem="{Binding Key}"

edited Apr 29 '21 at 09:26

answered Dec 15 '10 at 13:29

thumbmunkeys

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Ok, but your solution doesn’t work, same I try first then I wrote this question. – Dec 15 '10 at 13:33
ok, i saw i made a mistake, please try with Micro:Message.Attach="[MouseDoubleClick]=[Action SendRp(Friends.SelectedItem)]" – thumbmunkeys Dec 15 '10 at 13:39
2

You can use `SendRp($this)` since CM sets `SelectedItem` as `$this` for `ListBox` . – xmedeko Jun 19 '15 at 13:36
Yes, @xmedeko's answer is right. I checked his answer on my result. – DevCaf Apr 22 '21 at 19:12

send selected item as parameter to method in view-model [WPF,Caliburn]

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