WPF Data Grid Column Visibility Toggle Issue

Question

I have a WPF control that is used in multiple dialog forms. In one of these, I want to include a checkbox column along with two buttons that fire a method to either include all (check all the boxes) or exclude all (uncheck all the boxes.)
I setup a Boolean variable to control this "IsExcludeVisible"
Here is a snippet of the xaml:
<Grid>  
<Grid.ColumnDefinitions>
   <ColumnDefinition Width="Auto" />
   <ColumnDefinition Width="*"/>
 </Grid.ColumnDefinitions>
       <common:BaseDataGrid
  Name="grd"
  AutoGenerateColumns="False"            
  ItemsSource="{Binding ExcludeRoundingIngredientList}">
   <DataGrid.Columns>
     <DataGridTextColumn Header="Code" Binding="{Binding IngredientNumber}" />
     <DataGridTextColumn Header="Ingredient" Binding="{Binding Name}" />
           <DataGridCheckBoxColumn Header="Exclude"
Visibility="{Binding IsExcludeVisible,
                                     Converter={StaticResource VisibilityConverter}}"
                                   Binding="{Binding MillBatchMixExclude}" />
           <DataGridComboBoxColumn Header="Rounding"
    DisplayMemberPath="Name"
                                SelectedValuePath="RoundingId"
    SelectedValueBinding="{Binding MillBatchMixRoundingId}"
    ItemsSource="{Binding DataContext.RoundingOptions,Source={StaticResource Spy}}" />
     </DataGrid.Columns>
        </common:BaseDataGrid>
  <StackPanel ......
   <Button
    Content="Include All"
                x:Name="btnIncludeAll"
Visibility="{Binding IsExcludeVisible, Converter={StaticResource VisibilityConverter}}"
    csla:InvokeMethod.MethodName="IncludeAll"
    csla:InvokeMethod.TriggerEvent="Click"
    />
   <Button
    Content="Exclude All"
Visibility="{Binding IsExcludeVisible, Converter={StaticResource VisibilityConverter}}"
    csla:InvokeMethod.MethodName="ExcludeAll"
    csla:InvokeMethod.TriggerEvent="Click"
    />
  </StackPanel>
 </Grid>...
The button visibility toggles based on the IsExcludeVisible value as expected but the column visibility is totally unaffected.
Am I missing something here (which obviously I am.)
Below is my code to determine the value of the Boolean variable.
public bool IsExcludeVisible
get { return (SelectedReport.Name ==
"Horizontal Batch Mix"); }
Tom Mann MCSD C#

Answer 1

I think the best way is to make a label function something
like this (just off the top of my head, not tested):
public function rate_label(item:Object,
column:DataGridColumn):String
return "GBP"+item.prdt_rate;
Then in the DataGridColumn add a property:
labelFunction="rate_label"