Question How to iterate through WPF datagrid columns following mvvm pattern?

[TB007]

I want to iterate through a datagrid header column and get its values to a variable, something like

            foreach (DataGridColumn column in gridView.Columns)
            {
                var cell = column.Header.ToString()
            }

How can I do this following mvvm?

 

[TB007]

But how do I apply it in my case ? I've tried

                <DataGrid.Columns>
                    <DataGridTextColumn Binding="{Binding Path=eName}" Width="260">
                        <DataGridTextColumn.HeaderTemplate>
                            <DataTemplate>
                                <TextBlock Text="{Binding DataContext.billHead1, RelativeSource={RelativeSource AncestorType={x:Type DataGrid}}}"/>
                            </DataTemplate>
                        </DataGridTextColumn.HeaderTemplate>
                    </DataGridTextColumn>
                    <DataGridTextColumn Binding="{Binding Path=eAddress}" Width="200">
                        <DataGridTextColumn.HeaderTemplate>
                            <DataTemplate>
                                <TextBlock Text="{Binding DataContext.billHead2, RelativeSource={RelativeSource AncestorType={x:Type DataGrid}}}"/>
                            </DataTemplate>
                        </DataGridTextColumn.HeaderTemplate>
                    </DataGridTextColumn>
                    <DataGridTextColumn Binding="{Binding Path=eAge}" Width="210">
                        <DataGridTextColumn.HeaderTemplate>
                            <DataTemplate>
                                <TextBlock Text="{Binding DataContext.billHead3, RelativeSource={RelativeSource AncestorType={x:Type DataGrid}}}"/>
                            </DataTemplate>
                        </DataGridTextColumn.HeaderTemplate>
                    </DataGridTextColumn>
                </DataGrid.Columns>

But the headers are still not showing ...

 

[Skydiver]

The x:Type DataGrid should be the type of the container on which your view model is to to. So if you assigned the view model to the Window, use x:Type Window.