.Net MAUI Binding inside CollectionView Inside Datatemplate Inside ResourceDictionary

trashhacker commented 3 months ago

Description

<?xml version="1.0" encoding="utf-8" ?> <ResourceDictionary xmlns="http://schemas.microsoft.com/dotnet/2021/maui" xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" xmlns:vmpresenter="clr-namespace:Intrinsic.Client.ViewModels.Presenter" xmlns:syncfusiondatagrid="clr-namespace:Syncfusion.Maui.DataGrid;assembly=Syncfusion.Maui.DataGrid" xmlns:syncprogressbar="clr-namespace:Syncfusion.Maui.ProgressBar;assembly=Syncfusion.Maui.ProgressBar" xmlns:syncfusion="http://schemas.syncfusion.com/maui" xmlns:material="http://schemas.enisn-projects.io/dotnet/maui/uraniumui/material" xmlns:vm="clr-namespace:Intrinsic.Client.ViewModels" x:Class="Intrinsic.Client.Resources.Templates">

<DataTemplate x:Key="reminderpresentertemplate" x:DataType="{x:Type vmpresenter:ReminderPresenterViewModel}">
    <Grid>
        <syncfusiondatagrid:SfDataGrid ItemsSource="{Binding Reminders}" SelectedRow="{Binding Selected}" AutoGenerateColumnsMode="None" AllowEditing="False"
                           AllowDeleting="False" AllowDraggingColumn="False"  ColumnWidthMode="Fill" BackgroundColor="White">
            <syncfusiondatagrid:SfDataGrid.Columns>
                <syncfusiondatagrid:DataGridTextColumn HeaderText="{DynamicResource name}" DisplayBinding="{Binding Name}"/>
                <syncfusiondatagrid:DataGridTextColumn HeaderText="{DynamicResource started}" DisplayBinding="{Binding Started}"/>
                <syncfusiondatagrid:DataGridTextColumn HeaderText="{DynamicResource appointment}" DisplayBinding="{Binding Appointment}"/>
                <syncfusiondatagrid:DataGridTemplateColumn HeaderText="{DynamicResource remaining}" >
                    <syncfusiondatagrid:DataGridTemplateColumn.CellTemplate>
                        <DataTemplate x:DataType="{x:Type vm:ReminderViewModel}">
                            <syncprogressbar:SfLinearProgressBar  />
                            <!--Progress="{Binding Progress, Mode=OneWay}" Maximum="1" Minimum="0" Background="Transparent"
                                           ProgressFill="{Binding Expired, Converter={StaticResource reminderprogressconverter}}"-->
                        </DataTemplate>
                    </syncfusiondatagrid:DataGridTemplateColumn.CellTemplate>
                </syncfusiondatagrid:DataGridTemplateColumn>
            </syncfusiondatagrid:SfDataGrid.Columns>

        </syncfusiondatagrid:SfDataGrid>
    </Grid>
</DataTemplate>

If i use the x:DataType on the CollectinView.Itemtemplate: the debbuger (Error Analysier at Compliletime) says that the binding has a wrong string format
if i remove it: it says the property is not found... again at compile time

but i tried it with an converter and the correct value is passed but visual studio marks it as an error

Steps to Reproduce

create a Template in a ResourceDictionary use this contentcontrol for dynamically selecting the template populate a list in the template and bind it to the collection create an itemtemplate for the collection

namespace Intrinsic.Base
{
    public class ContentControl : ContentView
    {
    public static readonly BindableProperty DataTemplateSelectorProperty = BindableProperty.Create(nameof(DataTemplateSelector), typeof(DataTemplateSelector), typeof(ContentControl), propertyChanged: DataTemplateSelectorPropertyChanged);
    private static void DataTemplateSelectorPropertyChanged(BindableObject bindable, object oldValue, object newValue)
    {
        if (bindable is ContentControl control)
            control.GenerateContent();
    }

    public static readonly BindableProperty ItemTemplateProperty = BindableProperty.Create(nameof(ItemTemplate), typeof(DataTemplate), typeof(ContentControl), propertyChanged: ItemTemplatePropertyChanged);
    private static void ItemTemplatePropertyChanged(BindableObject bindable, object oldValue, object newValue)
    {
        if (bindable is ContentControl control)
            control.GenerateContent();
    }

    public static readonly BindableProperty ItemProperty = BindableProperty.Create(nameof(Item), typeof(object), typeof(ContentControl), propertyChanged: ItemPropertyChanged);
    private static void ItemPropertyChanged(BindableObject bindable, object oldValue, object newValue)
    {
        if (bindable is ContentControl control)
            control.GenerateContent();
    }

    public DataTemplateSelector DataTemplateSelector
    {
        get => (DataTemplateSelector)GetValue(DataTemplateSelectorProperty);
        set => SetValue(DataTemplateSelectorProperty, value);
    }
    public DataTemplate ItemTemplate
    {
        get => (DataTemplate)GetValue(ItemTemplateProperty);
        set => SetValue(ItemTemplateProperty, value);
    }
    public object Item
    {
        get => GetValue(ItemProperty);
        set => SetValue(ItemProperty, value);
    }
    private void GenerateContent()
    {
        if (Item != null && (DataTemplateSelector?.SelectTemplate(Item, this) ?? ItemTemplate) is DataTemplate template)
        {
            template.SetValue(BindingContextProperty, Item);
            if (template.CreateContent() is View view)
            {
                Content = view;
                return;
            }
        }

        Content = null;
        return;
        }
    }
}

Link to public reproduction project repository

No response

Version with bug

Unknown/Other

Is this a regression from previous behavior?

Not sure, did not test other versions

Last version that worked well

Unknown/Other

Affected platforms

Windows

Affected platform versions

8.0.40 /8.0.100

Did you find any workaround?

No response

Relevant log output

No response

github-actions[bot] commented 3 months ago

Hi I'm an AI powered bot that finds similar issues based off the issue title.

Please view the issues below to see if they solve your problem, and if the issue describes your problem please consider closing this one and thumbs upping the other issue to help us prioritize it. Thank you!

Open similar issues:

[DataTemplate/CollectionView] : Inconsistent behavior btw Release/Debug config with Xaml -> Bindings not working when x:DataType is not specified in Release mode (#20002), similarity score: 0.75
XAML error is shown when the content of a DataTemplate is not a View (#22485), similarity score: 0.72
Fails to bind dictionary to CollectionView on WinUI (#19208), similarity score: 0.72
Using DataTemplate breaks ObservableCollection binding (#15147), similarity score: 0.71

Closed similar issues:

DataTemplate bindings do not work (#21481), similarity score: 0.73

Note: You can give me feedback by thumbs upping or thumbs downing this comment.

trashhacker commented 3 months ago

ok i have checked the other issues... its not a duplicate, its kinda related ok... but this is a bug that has nothing to to with the sugested issues so pls can i have a visite or an answere from your code gurus :D

trashhacker commented 3 months ago

yea code gurus come from heaven to help me :D https://github.com/trashhacker/ReproBindingError

im sorry i did not read your guidlines for repos (: hope its ok

and yea its not only collectionview its more the datatemplate inside the what ever collection -- my bad sorry

if you remove

                        <Label Text="{Binding Identifier}"/>
                        <Label Text="{Binding Description}"/>

it will compile and if u copy and past it while debugging it will work too

dotnet / maui