vertical cell joining

[marc]

my customer would like to have a visual indicator, when vertical cells contain the same value. I've found a way to get it to work basically but some of my code looks pretty awfull.

<DataTemplate x:Key="Group_GridCellTemplate">
        <Grid>
            <Grid>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="auto"/>
                    <ColumnDefinition Width="*"/>
                </Grid.ColumnDefinitions>
                <style:CRowJoiner Template="{StaticResource MM_RJI}">
                    <style:CRowJoiner.DataContext>
                        <MultiBinding Converter="{StaticResource RJ}">
                            <Binding RelativeSource="{RelativeSource FindAncestor, AncestorType={x:Type telerik:GridViewCell}}" Path="Column" />
                            <Binding RelativeSource="{RelativeSource FindAncestor, AncestorType={x:Type telerik:GridViewCell}}" Path="ParentRow" />
                            <Binding RelativeSource="{RelativeSource FindAncestor, AncestorType={x:Type telerik:GridViewCell}}" Path="Value" />
                        </MultiBinding>
                    </style:CRowJoiner.DataContext>
                </style:CRowJoiner>
                <ContentControl Grid.Column="1" Content="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type telerik:GridViewCell}}, Path=Value}" ContentTemplateSelector="{StaticResource GCTS}" />
            </Grid>
        </Grid>
    </DataTemplate>

as you can see i am using the gridviewcell extensively. is it possible to simply pass the gridviewcell as a whole to a converter? currently i am passing 3 properties from the same object and thats just stupid. my converter uses the information provided to do the cell joining, its not exactly simple though.

[Pavel Pavlov]

Hi Marc,

That is an interesting hack . Unfortunately passing the whole cell is inappropriate as with RadGridView while scrolling cells are being reused . With your current approach you will have notifications on a property change for all 3 properties you use. In the case with the cell , you will lose that and the results may become unpredictable while the user scrolls vertically or horizontally .

Best wishes,
Pavel Pavlov
the Telerik team

[marc]

Hi Pavel,
you are soooo correct. I am noticing a strong drop in performance with larger tables, because of turning off virtualisation. turning it back on results in absolutely unpredictable results in my cells. I was wondering if there is a way to get a list of the sorted rows from the telerik grid. if not I will have to emulate the sorting behaviour of the grid. I guess I will then have to go throgh the sorted rows and update some background data that can be used for updating the cells. seems kind of complicated (not that my first approach was simple...).

What would your approach be?

[marc]

I have found a solution to my problem, but it is not really pleasing to me. I need to be able to identify the Column name using the Cell. To achieve this I am currently storing the Column Name within the Object being displayed in the cell. This works fine, but I don't like it, as it makes things more complicated. Is there any way to get the column name safely from the cell? I am already using a converter, so code behind is fine for me.