XAML: Markup Expression twice in same line, but is "translated" only once

Question

Hello,

I am programmin a silverlight data grid. The data basis is a list of stocks, which all have a Symbol (e.g. YHOO, SAP ...) I am defining a column with a Hyperlink which will lead the user to another page of the same silverlight app (UrlRouting).

               <data:DataGridTemplateColumn Header="Chart"><br/>
                    <data:DataGridTemplateColumn.CellTemplate><br/>
                        <DataTemplate><br/>
                            <StackPanel><br/>
                                <HyperlinkButton NavigateUri="/ChartPage/{Binding Path=Symbol}" <br/>
                                      TargetName="ContentFrame" Content="{Binding Path=Symbol}"/><br/>
                            </StackPanel><br/>
                        </DataTemplate><br/>
                    </data:DataGridTemplateColumn.CellTemplate><br/>
                </data:DataGridTemplateColumn>

See, there is twice the Markup Expression {Binding Path=Symbol} :
The first one provides the NavigateUrl (e.g. "/ChartPage/YHOO" )
The second one provides the label name of the hyperlink.
My Problem: The second expression will be translated, but not the first. So the label is written correctly ("YHOO"), but the Uri will end in "/ChartPage/{Binding Path=Symbol}", which I can see in the Browser.

Why there will be only one Markup Expression "translated"?

To be complete, here is the definition of the UriMapper:

<uriMapper:UriMapper>
  <uriMapper:UriMapping Uri="" MappedUri="/Views/ScreeningTable.xaml"/>
   <uriMapper:UriMapping Uri="/ChartPage/{Symbol}" MappedUri="/Views/ChartPage.xaml?symbol={Symbol}"/>
  <uriMapper:UriMapping Uri="/{pageName}" MappedUri="/Views/{pageName}.xaml"/>
  </uriMapper:UriMapper>

The UriRouting works fine, e.g. "/About" will deliver the "/Views/About.xaml" page!

Any hint is appreciated.
Herbert

Answer 1

Found the problem :-)

I cannot bind a string to the NavigateUri property. I need to define a converter to convert the string into a Uri object.

Solution found here:

http://forums.silverlight.net/forums/t/16055.aspx

Answer 2

Well, to be more detailed:

I cannot assemble a literal with a MarkupExtension.
Thus, I must bind the whole string, but not something like NavigateUri="/ChartPage/{Binding Path=Symbol}" . Possible would be a whole  NavigateUri="{Binding ChartUri}" .