Binding Text Not showing in xamarin forms

Question

Inside List Item button ActionText not showing after adding BindingContext on Button. after removing the BindingContext from Button then ActionText showing,but on button click event not working.

<ListView x:Name="ShipmentData" 
    HasUnevenRows="True" ItemsSource="{Binding ShipmentData}" SelectedItem="{Binding SelectedShippedItem}"
    BackgroundColor="White">
        <ListView.ItemTemplate>
            <DataTemplate>
                <ViewCell>
                    <Grid Margin="0" Padding="5" x:Name="Item">
                        <Grid.RowDefinitions>
                            <RowDefinition Height="*"/>
                        </Grid.RowDefinitions>
                        <Label Text="{Binding ShipTransId}" Grid.Row="0" IsVisible="False"/>
                        <Label Text="{Binding LabelUri}" Grid.Row="0" IsVisible="False"/>
                        <Label Text="{Binding OrderNumber}" Grid.Row="0" Grid.Column="0" HorizontalTextAlignment="Center"/>
                        <Label Text="{Binding ShippingId}" Grid.Row="0" Grid.Column="1" HorizontalTextAlignment="Center"/>
                        <Label Text="{Binding Status}" Grid.Row="0" Grid.Column="2" 
                               HorizontalTextAlignment="Center" HorizontalOptions="Center" VerticalOptions="Center"/>
                        <Button Text="{Binding ShipmentData.ActionText}" VerticalOptions="Center" 
                        HorizontalOptions="Center" BorderRadius="10"
                        Command="{Binding PrintLabel}" Grid.Row="0" Grid.Column="3" Margin="5,0,0,0"
                        BindingContext="{Binding Source={x:Reference ShipmentData}, Path=BindingContext}"
                        CommandParameter="{Binding Source={x:Reference Item}, Path=BindingContext}"/>
                    </Grid>
                </ViewCell>
            </DataTemplate>
        </ListView.ItemTemplate>
        <ListView.Behaviors>
             <eventToCommand:EventToCommandBehavior EventName="ItemTapped" Command="ShippedItemTapped"/>
        </ListView.Behaviors>
</ListView>

Here is my PageModel

public ObservableCollection<ShowShipmentData> ShipmentData
{
    get { return _shipmentData; }
    set
    {
        _shipmentData = value;
        RaisePropertyChanged();
    }
}

ShipmentData = DependencyService.Get<ISQLite2().ShowShipmentTableData(GlobalVariable.BranchId); 

public Command PrintLabel
{
    get
    {
        return new Command(async (e) =>
        {
            ShowShipmentData selecedItem = (e as ShowShipmentData);
        });
    }
}

How to solve this?

DependencyService.Get<ISQLite2().ShowShipmentTableData(GlobalVariable.BranchId); Is that method returning a string? — Woj
Is the ActionText a property of ShowShipmentData? Then it should just be: <Button Text="{Binding ActionText}" — Gerald Versluis
ActionText is a Property of ShowShipmentTableData Class and DependencyService.Get<ISQLite2().ShowShipmentTableData(GlobalVariable.BranchId); returning a list that are bind to the listview — Vidhya

Abdul Gani Abdul Gani · Accepted Answer · 2018-12-11T10:20:07

try modifying your Xaml code as below,

remove the below items

Command="{Binding PrintLabel}" BindingContext="{Binding Source={x:Reference ShipmentData}, Path=BindingContext}" CommandParameter="{Binding Source={x:Reference Item}, Path=BindingContext}"

and update with the below code, give your page a name and mention in the 'Command'

 Command="{Binding Source={x:Reference yourPageName}, Path=BindingContext.PrintLabel}"
                                                        CommandParameter="{Binding .}"

in the code behind, change your PrintLabel command property similar to below,

Command printLabel;
    public Command PrintLabel
    {
        get
        {
            return printLabel ?? (printLabel = new Command<ShowShipmentData>(ExecuteSelected));
        }
    }

    private void ExecuteSelected(ShowShipmentData selectedItem)
    {

    }

Binding Text Not showing in xamarin forms

1 Answers