Task: serialize the contents of TextBlock 'a (to preserve the original content), change and substitute it in TextBlock .

With serialization, trouble is simple. Found 2 ways, but both than something else does not fit.

Method 1:

Inlines go through the Inlines collection of the Inlines block and with the help of XamlWriter.Save(inline) save all the elements. Then I restore using XamlReader.Parse(string) .

The downside is that XamlWriter is able to save only those properties that were assigned in runtime, so if I fill TextBlock in the designer, all elements (Run, Span, etc.) are saved without properties and even without text. Just empty.

Method 2:

 // Текущим элементом тут является `TextBlock` // _content имеет тип string var tr = new TextRange(ContentStart, ContentEnd); using(var stream = new MemoryStream()) { tr.Save(stream, DataFormats.Xaml); stream.Position = 0; using(var reader = new StreamReader(stream)) { _content = reader.ReadToEnd(); } }

In the text block I have this

 <Run Text="{Binding Property}" FontWeight="Bold"/>

_content written in _content

 <Span xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xml:space="preserve" xml:lang="en-us" FlowDirection="LeftToRight" NumberSubstitution.CultureSource="Text" NumberSubstitution.Substitution="AsCulture" FontFamily="Segoe UI" FontStyle="Normal" FontWeight="Bold" FontStretch="Normal" FontSize="12" Foreground="#FF000000" Typography.StandardLigatures="True" Typography.ContextualLigatures="True" Typography.DiscretionaryLigatures="False" Typography.HistoricalLigatures="False" Typography.AnnotationAlternates="0" Typography.ContextualAlternates="True" Typography.HistoricalForms="False" Typography.Kerning="True" Typography.CapitalSpacing="False" Typography.CaseSensitiveForms="False" Typography.StylisticSet1="False" Typography.StylisticSet2="False" Typography.StylisticSet3="False" Typography.StylisticSet4="False" Typography.StylisticSet5="False" Typography.StylisticSet6="False" Typography.StylisticSet7="False" Typography.StylisticSet8="False" Typography.StylisticSet9="False" Typography.StylisticSet10="False" Typography.StylisticSet11="False" Typography.StylisticSet12="False" Typography.StylisticSet13="False" Typography.StylisticSet14="False" Typography.StylisticSet15="False" Typography.StylisticSet16="False" Typography.StylisticSet17="False" Typography.StylisticSet18="False" Typography.StylisticSet19="False" Typography.StylisticSet20="False" Typography.Fraction="Normal" Typography.SlashedZero="False" Typography.MathematicalGreek="False" Typography.EastAsianExpertForms="False" Typography.Variants="Normal" Typography.Capitals="Normal" Typography.NumeralStyle="Normal" Typography.NumeralAlignment="Normal" Typography.EastAsianWidths="Normal" Typography.EastAsianLanguage="Normal" Typography.StandardSwashes="0" Typography.ContextualSwashes="0" Typography.StylisticAlternates="0" BaselineAlignment="Baseline" TextDecorations=""><Run>qwe</Run></Span>

What I did was keep all the formatting for the current element from the parent and at the same time transferred FontWeight="Bold" to the overall style. That is, in this case, I have 2 options:

  1. Trim common styles and lose specific formatting with them.
  2. Leave everything as it is, but it will pop up, if at runtime someone changes some style in the text block.

I do not know what to do. Option 2.2 is the most suitable, but still a curve. The execution time of the code also matters, therefore, "not to run through all the properties of the original and include / exclude in the result".

    1 answer 1

    At the moment there is such a solution (the current object is TextBlock ):

     var sp = new Span(); sp.Inlines.AddRange(Inlines.ToArray()); var tr = new TextRange(sp.ContentStart, sp.ContentEnd); using (var stream = new MemoryStream()) { tr.Save(stream, DataFormats.Xaml); stream.Position = 0; using(var reader = new StreamReader(stream)) { _content = reader.ReadToEnd(); } } Inlines.AddRange(sp.Inlines.ToArray());

    That is, first we create Span , fill it from a text block and save it already. In this case, all the formatting properties of the elements inside are preserved.