Content view binding not working - forms

Question

I have ContentView which need ViewModel binding
Test.xaml
<ContentView.Content>
<Frame x:Name="HelpBaseFrame" BackgroundColor="White" CornerRadius="16" HorizontalOptions="Fill" VerticalOptions="Center">
<StackLayout>
<ListView HasUnevenRows="True" x:Name="lstview" SeparatorColor="White">
<ListView.ItemTemplate>
<DataTemplate>
<ViewCell IsEnabled="False">
<ScrollView x:Name="ScrollView" Orientation="Vertical" Padding="0, 1, 0, 0" BackgroundColor="Transparent" HorizontalOptions="Center">
<StackLayout>
<Label x:Name="LabelHeader" FontAttributes="Bold" Font="HiraginoSans-W6, 16"
HorizontalOptions="Center" Margin="0,20,0,0">
<Label.Text>
<Binding Path="HeaderData"></Binding>
</Label.Text>
</Label>
<local:LineSpacingLabel x:Name="LabelHeaderDesceiption" LineSpacing="6"
Font="HiraginoSans-W3, 16" FontAttributes="None" Margin="0,20,0,0">
<Label.Text>
<Binding Path="DescriptionData"></Binding>
</Label.Text>
</local:LineSpacingLabel>
</StackLayout>
</ScrollView>
</ViewCell>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</StackLayout>
</Frame>
</ContentView.Content>
BindingClass
public void SetData(Dictionary<string, string> dictionary)
{
............
lstview.ItemsSource = HelpDataList; // HelpDataList is observable collection of HElp Data
}
Model class :
public class HelpData : BaseViewModel
{
private string Header = string.Empty;
private string Description = string.Empty;
public string HeaderData
{
get { return Header; }
set
{
Header = value;
OnPropertyChanged("HeaderData");
}
}
public string DescriptionData { get; set; }
}
This view model for above view.
This binding is not working.
Is anything wrong?
This view model for above view.
This binding is not working.
Is anything wrong?
This view model for above view.
This binding is not working.
Is anything wrong?

Answer 1

You have to set bindingContext on the target control by using x:Reference markup extension.
BindingContext="{x:Reference Name=ViewModelField}"
Or
BindingContext="{x:Reference ViewModelField}"
Label.Text should be binding with string not viewModel.
Text="{Binding Path=Value}"
Or
Text="{Binding Value}" ( “Path=” part of the markup extension can be omitted if the path is the first item in the Binding markup extension)
Refer to Bindings
Update
<Binding> is not a valid tag.
Modify the label :
<Label Text="{Binding Path = HeaderData}">