how to access other resources inside a ResourceDictionary

Question

A DataTemplate inside a Resource Dictionary needs to refer to a Styles.xaml, so I have the following

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                     xmlns:src="clr-namespace:WPFApp">
    <ResourceDictionary.MergedDictionaries>
        <ResourceDictionary Source="resources/Styles.xaml" />
    </ResourceDictionary.MergedDictionaries>

    <DataTemplate DataType="{x:Type src:MyFileInfo}">
        <Grid>
            grid stuff
        </Grid>

        <TextBlock> stuff </TextBlock>
    </DataTemplate>


</ResourceDictionary>

but there is an error at DataTemplate saying that The proprety "Visual Tree" can only be set once. What does this mean? Is it good practice to put a DataTemplate inside a ResourceDictionary? How to access other resources inside a ResourceDictionary?

Do you actually have `"x:Type src:MyFileInfo"` or `"{x:Type src:MyFileInfo}"`? Also refer to [this](http://stackoverflow.com/questions/22965447/the-property-visualtree-is-set-more-than-once) question. Problem may be in _data template stuff_ — dkozl, Oct 21 '14 at 09:04
oops, fixed. I think you are right; the error went away after deleting `data template stuff`... — totoro, Oct 21 '14 at 09:10
Can you show your `DataTemplate`? Error would suggest that it contains more then one root element — dkozl, Oct 21 '14 at 09:12
@dkozl thanks, that post solved my problem. can I still delete this question? since the problem isn't really in the code — totoro, Oct 21 '14 at 09:13

score 2 · Accepted Answer · answered Oct 21 '14 at 09:46

2

A DataTemplate should only have one child. Use this:

<DataTemplate DataType="{x:Type src:MyFileInfo}">
    <Grid>
        grid stuff
        <TextBlock> stuff </TextBlock>
    </Grid>        
</DataTemplate>

answered Oct 21 '14 at 09:46

flo_badea

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how to access other resources inside a ResourceDictionary

1 Answers1