Hi Thomas,

We have found the problem and have made a hot fix for this. You could get the hot fix here. Please note that this update only applied to Unified API. For information about Unified API migration, please refer to this guide.

Best Regards,
Leo

Hi Leo Hong,

Please make sure that the View (ex:UILabel) have a valid referencing outlet with the same name as the one you have used in binding provider. If the xib have been configured correctly, the following code should be able to help you binding SectionHeader of UICollectionView:

1. On binding provider, bind the label on header section using ItemBindingDescription with "Group" TargetBindingType. Example:

itemBinding.AddBinding("TextLabel", BindableProperties.TextProperty, new BindingDescription("Title"), TargetBindingType.Group);

2. On ViewModel, please make sure that GroupItems never return null but empty List instead. This is useful so BindingProvider could recognize your GroupItems. Example:

public override System.Collections.IEnumerable GroupItems {	get {
		return (base.GroupItems != null) ? base.GroupItems : new List ();
	}
	set {
		base.GroupItems = value;
	}
}

3. Please set your ViewController to used the defined View and to show Section Header. Example:

public override bool ShowSectionHeader
{
	get
	{
		return true;
	}
}
public override UIViewTemplate SectionHeaderTemplate
{
	get
	{
		return new UIViewTemplate(ItemCollectionViewHeader.Nib);
	}
}

note: ItemCollectionViewHeader should inherited from UICollectionReusableView.

That should allow you to bind the views in SectionHeader.

Best Regards,
Leo Chandra

Hi Thomas,

Yes. You must add this.RegisterViewIdentifier("EditButton", this.EditButton);
Sorry, I seem I miss it on my answer.

Regarding setting SelectedItems programmatically, there is a work around by implementing this in view controller:

protected override void OnViewModelPropertyChanged(PropertyChangedEventArgs e){
    if(e.PropertyName == "SelectedItems"){
        //Deselected all item in view
        if(this.TableView.IndexPathsForSelectedRows != null)
            foreach(NSIndexPath selectedPath in this.TableView.IndexPathsForSelectedRows){
                this.TableView.DeselectRow(selectedPath, true);
            }
        //Reselect all item based on current SelectedItems on ViewModel
        if(this.ViewModel.SelectedItems != null)
            foreach(DataSamples.Models.Item item in this.ViewModel.SelectedItems){
                var index = this.ViewModel.Items.IndexOf(item);
                var groupIndex = 0;
                if(this.ViewModel.GroupItems != null){
                    bool founded = false;
                    List<CategoryGroup> list = (List<CategoryGroup>)this.ViewModel.GroupItems;
                    for(int i=0;i<list.Count;i++){
                        var groupItem = list[i];
                        for(int j=0;j<groupItem.Count;j++){
                            var tempItem = groupItem[j];
                            if(tempItem == item){
                                index = j;
                                groupIndex = i;
                                break;
                            }
                        }
                        if (founded)
                            break;
                    }
                }
                var indexs = NSIndexPath.FromRowSection(index, groupIndex);
                this.TableView.SelectRow(indexs,true,UITableViewScrollPosition.None);
            }
    }
}

Hi Thomas,

Sorry for the delay. From the answer I got from our developer team, The event was suppressed by crosslight because all logic operation should be done in ViewModel.

Best Regards,
Leo

Hi Bruce,

Glad to hear that the snippet code helps.

Should you need further assistance or run into any problems regarding our controls, feel free to post it into our forum. We would be happy to assist you again.

Best Regards,
Leo