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HtmlFormatProvider in RadTabControl

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RichTextBox
This is a migrated thread and some comments may be shown as answers.
Michael
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Michael asked on 15 Apr 2016, 10:52 PM
Hi,

 

I am trying to get a series of tab RichTextEditors to return formatted text as html markup fragments, and not the fully-qualified HTML doc.  We use this same RichTextEdit elsewhere which honors the formatting settings to return fragments (but not in a tab control), but in the context below, it always returns the default full html doc no matter what.  Originally this was using a resource dictionary, but I inlined the HTMLDataProvider to try to isolate the problem

 
<telerik:RadTabControl Style="{DynamicResource TabControlNoHeaderBackground}" ItemsSource="{Binding Disclosures}">
    <telerik:RadTabControl.ItemTemplate>
        <DataTemplate>
            <TextBlock Text="{Binding DisclosureTypeName}" />
        </DataTemplate>
    </telerik:RadTabControl.ItemTemplate>
    <telerik:RadTabControl.ContentTemplate>
        <DataTemplate>
            <Grid>
                <telerik:HtmlDataProvider x:Name="CustomerHtmlDataProvider"
                                          Html="{Binding Content, Mode=TwoWay}"
                                          RichTextBox="{Binding ElementName=TxtDisclosureContent}">
                    <telerik:HtmlDataProvider.FormatProvider>
                        <telerik:HtmlFormatProvider>
                            <telerik:HtmlFormatProvider.ExportSettings>
                                <telerik:HtmlExportSettings
                                    DocumentExportLevel="Fragment"
                                    ImageExportMode="None"
                                    ExportFontStylesAsTags="True"
                                    ExportStyleMetadata="False">
                                </telerik:HtmlExportSettings>
                            </telerik:HtmlFormatProvider.ExportSettings>
                        </telerik:HtmlFormatProvider>
                    </telerik:HtmlDataProvider.FormatProvider>
                </telerik:HtmlDataProvider>
                <telerik:RadRichTextBox x:Name="TxtDisclosureContent" IsSpellCheckingEnabled="False" />
            </Grid>
        </DataTemplate>
    </telerik:RadTabControl.ContentTemplate>
</telerik:RadTabControl>

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Mihail
Telerik team
answered on 20 Apr 2016, 04:39 PM
Hello Michael,

We made some tests to find the source of this issue and it turns out that it is a WPF problem.  In particular, DataTemplate may reset local values set to the dependency property.
The solution is to use a user control in your data template.

I hope this information is helpful for you.

Regards,
Mihail
Telerik
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Michael
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Mihail
Telerik team
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