I have searched around and I dont think I am finding the answer to my question. I am new to xamarin so i hope I am using the correct terminology. I am experimenting with custom cells in listviews. My aim is to reuse the custom cell throughout multiple parts of my application but when I use the event "ItemSelected" it comes back with the bindings to the custom cell and not my original listview itemsource bindings. I understand why I think but I am unsure how to bind the ItemSelected to the original source. Am I using the right method here? I am completely lost if I am honest.
This is my custom cell code:
public partial class ListCell : ViewCell
{
public static readonly BindableProperty LabelHeaderProperty = BindableProperty.Create("LabelHeader", typeof(string), typeof(ListCell));
public string LabelHeader
{
get { return (string)GetValue(LabelHeaderProperty); }
set { SetValue(LabelHeaderProperty, value); }
}
public static readonly BindableProperty LabelSmallProperty = BindableProperty.Create("LabelSmall", typeof(string), typeof(ListCell));
public string LabelSmall
{
get { return (string)GetValue(LabelSmallProperty); }
set { SetValue(LabelSmallProperty, value); }
}
public ListCell()
{
InitializeComponent();
}
protected override void OnAppearing()
{
base.OnAppearing();
BindingContext = new
{
LabelHeader = this.LabelHeader,
LabelSmall = this.LabelSmall
};
}
}
Here is my ListView
<ListView x:Name="MyListView"
ItemsSource="{Binding Items}"
VerticalOptions="FillAndExpand"
HasUnevenRows="true"
IsPullToRefreshEnabled="true"
ItemSelected="OnItemSelected"
SeparatorVisibility="None">
<ListView.ItemTemplate>
<DataTemplate>
<extensions:ListCell LabelHeader="{Binding Description}"
LabelSmall="{Binding Description}"/>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
Thank you very much in advance :)
According to your code, when binding to a custom cell type's BindableProperty instances, the UI controls displaying the BindableProperty values should use the OnBindingContextChanged override to set the data to be displayed in each cell.
public class ListCell:ViewCell
{
Label headerLabel, smallLabel;
public static readonly BindableProperty LabelHeaderProperty = BindableProperty.Create("LabelHeader", typeof(string), typeof(ListCell),"name");
public string LabelHeader
{
get { return (string)GetValue(LabelHeaderProperty); }
set { SetValue(LabelHeaderProperty, value); }
}
public static readonly BindableProperty LabelSmallProperty = BindableProperty.Create("LabelSmall", typeof(string), typeof(ListCell),"small label");
public string LabelSmall
{
get { return (string)GetValue(LabelSmallProperty); }
set { SetValue(LabelSmallProperty, value); }
}
public ListCell()
{
StackLayout stack = new StackLayout { Orientation=StackOrientation.Horizontal};
headerLabel = new Label { FontAttributes = FontAttributes.Bold };
smallLabel = new Label();
stack.Children.Add(headerLabel);
stack.Children.Add(smallLabel);
View = stack;
}
protected override void OnBindingContextChanged()
{
base.OnBindingContextChanged();
if (BindingContext != null)
{
headerLabel.Text = LabelHeader;
smallLabel.Text = LabelSmall;
}
}
}
<ListView
x:Name="listView"
ItemSelected="listView_ItemSelected"
ItemsSource="{Binding items}">
<ListView.ItemTemplate>
<DataTemplate>
<local:ListCell LabelHeader="{Binding Name}" LabelSmall="{Binding description}" />
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
But You can use TextCell in ListView's DataTemplate directly, don't need to create custom viewcell.
<ListView ItemsSource="{Binding items}">
<ListView.ItemTemplate>
<DataTemplate>
<TextCell Detail="{Binding description}" Text="{Binding name}" />
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
About using TextCell, you can take a look: