Datagridcolumn: Binding Visibility and Width via BindingProxy show different behavior

Question

As the columns of a data grid aren\'t in the visual tree of datagrid I\'m m using this approach of Binding Proxy to bind Visibility of a DataGridTextColumn.

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Answer 1

The type of the Width property of a DataGridColumn is DataGridLength and not double.

Change type of your source property:

public DataGridLength Width
{
    get { return m_width; }
    set { m_width = value; OnPropertyChanged("Width"); }
}

DataGridLength m_width;

And the Mode of the Binding:

<DataGridTextColumn Header="ProductId1" Binding="{Binding Path=Result[1]}"
                    Visibility="{Binding Data.Columns[0].Visible, Source={StaticResource proxy}}" 
                    Width="{Binding Data.Columns[0].Width, Source={StaticResource proxy}, Mode=TwoWay}" />