Trying to bind datatable with listbox...something wrong - wpf

Question

Please help...what am I doing wrong here? Trying to bind listbox to datatable. After debugging, i see data rows in the table but some how it is not binding to listbox.
FYI. _this is the name of my current window...
<ListBox Grid.Column="1" ItemsSource="{Binding ElementName=_this, Path=MainCategoriesTable}" HorizontalAlignment="Center" BorderBrush="Transparent" Background="Transparent" x:Name="lbMainCategories">
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<RadioButton Grid.Column="0" Content="{Binding Path=main_category_name}" VerticalAlignment="Center" GroupName="grpMainCategory" x:Name="rdbEnableDisable" />
<Label Grid.Column="1" Width="30" Background="Transparent" />
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
Below is the property trying to bind with...
public DataTable MainCategoriesTable
{
get { return _dtMainCategory; }
set { _dtMainCategory = value; }
}

Answer 1

For XAML to set the data context tocode behind this is what works for me
DataContext="{Binding RelativeSource={RelativeSource Self}}"
in code behind
this.DataContext = this;
But I used _this like you have used it successfully.
Set Presentation.Trace = High in the all XAML binding. That is not the exact syntax but if you start with Presentation it should be obvious.
Why no binding on label.
main_category_name is a public property? I notice it is in lower case.

Answer 2

DataTable works like a dictionary, not like an object. It doesn't expose your columns as properties, but each DataRow exposes an indexer that can be used to get the cell value. Therefore, you need to use indexer syntax:
<RadioButton Grid.Column="0" Content="{Binding Path=[main_category_name]}" VerticalAlignment="Center" GroupName="grpMainCategory" x:Name="rdbEnableDisable" />
UPDATE
Another thing that bothers me is that your MainCategoriesTable property doesn't notify about changes. If it's changed after all Bindings have been initialized, it won't work (while DependencyProperty will, because it always notifies about changes). To make it work, your context class must implement INotifyPropertyChanged interface and your property must look like this:
public DataTable MainCategoriesTable
{
get { return _dtMainCategory; }
set
{
if(value == _dtMainCategory)
{
return;
}
_dtMainCategory = value;
var h = this.PropertyChanged;
if(h != null)
{
h(this, new PropertyChangedEventArgs("MainCategoriesTable"));
}
}
}