Introduction
A footer row with the column totals frozen at the bottom is a fairly common item on grids. You can probably get one by using a DataGrid,
but there’s a good deal of complexity associated with DataGrids you might want to avoid.
Using the Code
I made a Custom Control ListViewF based on the standard ListView. You need to supply the
ListViewF with a FooterObj which
should be the same type of object you are displaying in the regular rows. You can specify a
FooterStyle. Both FooterObj and FooterStyle can be instantiated in
the XAML.
You will need to call the ListViewF.InitFooter function after the columns have loaded. The function creates a
CellTemplateSelector for each GridViewColumn.
If the column is using DisplayMemberBinding it creates two CellTemplates – one for the regular
cells and one for the footer. The regular cell template is just
a TextBlock with the Text bound to whatever the DisplayMemberBinding was. The footer is the same but wrapped in a
Border. The original DisplayMemberBinding
is cleared so the DataTemplateSelector can be used.
If the column is using a CellTemplate it creates a footer template by adding a
ContentPresenter with the original template as the ContentTemplate and then
wrapping the ContentPresenter in a Border.
I don’t handle cases where the column already has a CellTemplateSelector. It shouldn’t be too hard to create a new selector that calls the original
CellTemplateSelector
and then either returns the original template or wraps it in a Border.
Points of Interest
You need to use a custom GridView that overrides the DefaultStyleKey. If you add columns using a normal
GridView the Control goes back to using the regular
ListView template.
