Accessing DataContext properties in View - c

Question

I'm hoping someone can give me a kick in the right direction, I'm currently learning WPF and MVVM - let's say its not been plain sailing. Basically I'm trying to access the properties of DataContext and bind them to a property in my view. I'll be completely honest, I've got myself in a bit of a tangle.
When the user clicks the button in question it fires the code below.
private void OnReceiptClick(object sender, RoutedEventArgs e)
{
var dialogBox = new DisplayReceiptView(((CheckMemberViewModel) this.DataContext).ReceiptViewModel);
dialogBox.ShowDialog();
}
My CheckMemberViewModel currently holds the 'Person' property I'm after, and at this stage DataContext is populated as expected.
The code behind my DisplayReceiptView looks like the following:
public DisplayReceiptView(ReceiptViewModel context) : this()
{
this.DataContext = context;
}
Once again everything seems correct, and finally in my XAML I have
<Grid DataContext="{Binding Path=Person}">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="10"/>
<ColumnDefinition Width="150"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="10" />
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<Label Grid.Column="1" Grid.Row="1">Name:</Label>
<TextBox Grid.Column="2" Grid.Row="1" Text="{Binding Path=Person.Forename}"></TextBox>
</Grid>
Unfortunately no matter what I've done, and I think where I'm up to at the moment is the closest I've been, the data doesn't seem to bind. Below is my ViewModel code for the properties
private Person _person;
public Person Person
{
get { return _person; }
set
{
if (value != _person)
{
_person = value;
OnPropertyChanged("Person");
}
}
}
Any help is greatly appreciated.

Answer 1

<TextBox Grid.Column="2" Grid.Row="1" Text="{Binding Path=Person.Forename}"></TextBox>
This is wrong as you are already bound to Person
<TextBox Grid.Column="2" Grid.Row="1" Text="{Binding Forename}"></TextBox>
Is all you need
<TextBox Grid.Column="2" Grid.Row="1" Text="{Binding Forename, Mode=TwoWay}"></TextBox>
Will save changes to the source and retrieve changes, but of course you will need to save context changes to make them permanent