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optimised the test sample.
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@praveenkumarkarunanithi
praveenkumarkarunanithi committed Nov 15, 2024
1 parent 8fa9023 commit 10bf138
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Showing 2 changed files with 75 additions and 132 deletions.
112 changes: 41 additions & 71 deletions ...rols/CollectionViewGalleries/EmptyViewGalleries/EmptyViewWithDataTemplateSelector.xaml.cs
View file
Original file line number Diff line number Diff line change
Expand Up @@ -17,89 +17,59 @@ public partial class EmptyViewWithDataTemplateSelector : ContentPage
public EmptyViewWithDataTemplateSelector()
{
InitializeComponent();
var emptyViewTemplateSelector = new SearchTermDataTemplateSelector
{
DefaultTemplate = (DataTemplate)Resources["AdvancedTemplate"],
OtherTemplate = (DataTemplate)Resources["BasicTemplate"]
};
collectionView.EmptyViewTemplate = emptyViewTemplateSelector;
BindingContext = new EmptyViewWithDataTemplateSelectorViewModel();
var emptyViewTemplateSelector = new SearchTermDataTemplateSelector
{
DefaultTemplate = (DataTemplate)Resources["AdvancedTemplate"],
OtherTemplate = (DataTemplate)Resources["BasicTemplate"]
};
collectionView.EmptyViewTemplate = emptyViewTemplateSelector;
BindingContext = new EmptyViewWithDataTemplateSelectorViewModel();
}

public class Monkey
{
public string? Name { get; set; }
public string? Location { get; set; }
public string? Details { get; set; }
}

public class SearchTermDataTemplateSelector : DataTemplateSelector
{
public DataTemplate? DefaultTemplate { get; set; }
public DataTemplate? OtherTemplate { get; set; }
{
public DataTemplate? DefaultTemplate { get; set; }
public DataTemplate? OtherTemplate { get; set; }

protected override DataTemplate? OnSelectTemplate(object item, BindableObject container)
protected override DataTemplate? OnSelectTemplate(object item, BindableObject container)
{
string query = (string)item;
return query.Equals("xamarin", StringComparison.OrdinalIgnoreCase) ? OtherTemplate : DefaultTemplate;
}
}
}

internal class EmptyViewWithDataTemplateSelectorViewModel : INotifyPropertyChanged
internal class EmptyViewWithDataTemplateSelectorViewModel
{
private readonly IList<Monkey> source;
public ObservableCollection<Monkey> Monkeys { get; set; }
public ICommand FilterCommand => new Command<string>(FilterItems);
public ObservableCollection<Monkey> Monkeys { get; } = new();
public ICommand FilterCommand => new Command<string>(FilterItems);

public EmptyViewWithDataTemplateSelectorViewModel()
{
source = new List<Monkey>();
CreateMonkeyCollection();
Monkeys = new ObservableCollection<Monkey>(source);
}
public EmptyViewWithDataTemplateSelectorViewModel()
{
// Directly populate the ObservableCollection
Monkeys.Add(new Monkey
{
Name = "Baboon",
Location = "Africa & Asia",
Details = "Baboons are African and Arabian Old World monkeys belonging to the genus Papio, part of the subfamily Cercopithecinae."
});
}

public partial class Monkey
{
public string? Name { get; set; }

public string? Location { get; set; }

public string? Details { get; set; }

}

private void CreateMonkeyCollection()
{
source.Add(new Monkey
{
Name = "Baboon",
Location = "Africa & Asia",
Details = "Baboons are African and Arabian Old World monkeys belonging to the genus Papio, part of the subfamily Cercopithecinae."
});
}

private void FilterItems(string filter)
{
var filteredItems = source
.Where(monkey => monkey.Name != null && monkey.Name.IndexOf(filter, StringComparison.OrdinalIgnoreCase) >= 0)
.ToList();
foreach (var monkey in source)
{
if (!filteredItems.Contains(monkey))
{
Monkeys.Remove(monkey);
}
else
{
if (!Monkeys.Contains(monkey))
{
Monkeys.Add(monkey);
}
}
}
}

#region INotifyPropertyChanged
public event PropertyChangedEventHandler? PropertyChanged;

protected void OnPropertyChanged([CallerMemberName] string propertyName = "")
{
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName!));
}
#endregion
private void FilterItems(string filter)
{
var filteredItems = Monkeys.Where(monkey => monkey.Name?.Contains(filter, StringComparison.OrdinalIgnoreCase) ?? false).ToList();
Monkeys.Clear();
foreach (var monkey in filteredItems)
{
Monkeys.Add(monkey);
}
}
}
}
}
95 changes: 34 additions & 61 deletions src/Controls/tests/TestCases.HostApp/Issues/Issue25224.xaml.cs
View file
Original file line number Diff line number Diff line change
Expand Up @@ -13,79 +13,52 @@ public partial class Issue25224: ContentPage
public Issue25224()
{
InitializeComponent();
var emptyViewTemplateSelector = new SearchTermDataTemplateSelector
{
DefaultTemplate = (DataTemplate)Resources["AdvancedTemplate"],
OtherTemplate = (DataTemplate)Resources["BasicTemplate"]
};
collectionView.EmptyViewTemplate = emptyViewTemplateSelector;
BindingContext = new Issue25224ViewModel();
var emptyViewTemplateSelector = new SearchTermDataTemplateSelector
{
DefaultTemplate = (DataTemplate)Resources["AdvancedTemplate"],
OtherTemplate = (DataTemplate)Resources["BasicTemplate"]
};
collectionView.EmptyViewTemplate = emptyViewTemplateSelector;
BindingContext = new Issue25224ViewModel();
}

public class SearchTermDataTemplateSelector : DataTemplateSelector
{
public DataTemplate? DefaultTemplate { get; set; }
public DataTemplate? OtherTemplate { get; set; }
{
public DataTemplate? DefaultTemplate { get; set; }
public DataTemplate? OtherTemplate { get; set; }

protected override DataTemplate? OnSelectTemplate(object item, BindableObject container)
protected override DataTemplate? OnSelectTemplate(object item, BindableObject container)
{
string query = (string)item;
return query.Equals("xamarin", StringComparison.OrdinalIgnoreCase) ? OtherTemplate : DefaultTemplate;
}
}
}

internal class Issue25224ViewModel : INotifyPropertyChanged
internal class Issue25224ViewModel
{
private readonly IList<Monkey> source;
public ObservableCollection<Monkey> Monkeys { get; set; }
public ICommand FilterCommand => new Command<string>(FilterItems);

public Issue25224ViewModel()
{
source = new List<Monkey>();
CreateMonkeyCollection();
Monkeys = new ObservableCollection<Monkey>(source);
}

private void CreateMonkeyCollection()
{
source.Add(new Monkey
{
Name = "Baboon",
Location = "Africa & Asia",
Details = "Baboons are African and Arabian Old World monkeys belonging to the genus Papio, part of the subfamily Cercopithecinae."
});
}
public ObservableCollection<Monkey> Monkeys { get; } = new();
public ICommand FilterCommand => new Command<string>(FilterItems);

private void FilterItems(string filter)
{
var filteredItems = source
.Where(monkey => monkey.Name != null && monkey.Name.IndexOf(filter, StringComparison.OrdinalIgnoreCase) >= 0)
.ToList();
foreach (var monkey in source)
{
if (!filteredItems.Contains(monkey))
{
Monkeys.Remove(monkey);
}
else
{
if (!Monkeys.Contains(monkey))
{
Monkeys.Add(monkey);
}
}
}
}
public Issue25224ViewModel()
{
// Directly populate the ObservableCollection
Monkeys.Add(new Monkey
{
Name = "Baboon",
Location = "Africa & Asia",
Details = "Baboons are African and Arabian Old World monkeys belonging to the genus Papio, part of the subfamily Cercopithecinae."
});
}

#region INotifyPropertyChanged
public event PropertyChangedEventHandler? PropertyChanged;

protected void OnPropertyChanged([CallerMemberName] string propertyName = "")
{
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName!));
}
#endregion
private void FilterItems(string filter)
{
var filteredItems = Monkeys.Where(monkey => monkey.Name?.Contains(filter, StringComparison.OrdinalIgnoreCase) ?? false).ToList();
Monkeys.Clear();
foreach (var monkey in filteredItems)
{
Monkeys.Add(monkey);
}
}
}
}
}

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