Binding Visible property of a DataGridColumn in WPF DataGrid

Question

I cannot bind the Visible property of the WPF datagridtextcolumn to a boolean value.

My binding expression is,

{Binding Path=DataContext.IsThisColumnVisible, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=Window},Converter={StaticResource vc}}

I have checked that the converter works (bool to the visibility enum) and is in scope.

If I use the same expression for the header of the column, the header displays 'false' as expected.

Visible is a dependency property so should be bindable.

Anyone see what Im doing wrong? Or has anyone else been able to bind to the visible property.

Regards,

Matt

Pyretic

Answer 1

I worked this out.

DataGridCOlumn is not a framework element so the FindAncestor call was failing (DataGridColumn not part of visual tree)

Have to set source property of binding expression to a staticresource and it works fine.

Pyretic

Here is the example of using StaticResource proxy to forward DataContext: tomlev2.wordpress.com/2011/03/21/… – Wholewheat

i am using MVVM and it worked finde with the provided link: thomaslevesque.com/2011/03/21/… – Zaria

Answer 2

Hard to say from so little of your code. What is in Visual Studio's Output window (under Debug)? That will often give you a clue as to the problem.

Kaleykaleyard

Answer 3

I was looking for the same thing and found an execellent way to do it in an article about forwarding datacontext to columns.

Laggard

Yes. forwarding datacontext is the way to go. Similar but IMHO simpler approach: tomlev2.wordpress.com/2011/03/21/… – Wholewheat

Answer 4

If you can bind from code you can use

BindingOperations.SetBinding(DatagridColumInstance,
                             DatagridColum.VisibilityProperty,
                             myNewBindDef);

Fowler