Today's shaping up to be pretty good. I give today a 10/10.
Music. Coding. Gaming. Life.
I couldn't find a full example of this, I had to put bits and pieces together before I got this working.
Let's say you have a datasource, and in that datasource, one of the datamembers is a string that contains some FlowDocument XAML. For example:
Unfortunately, there's no way to directly bind a string to a FlowDocument object. However, XAML databinding allows the use of custom converters that allows you to take that string and convert it to whatever you like. To do this, create a class:
Now add your xmlns to the page/usercontrol/window/whatever...
Create yourself some resources...
And bind like so...
Just replace "PropertyName" with the name of the property or column that has the XAML FlowDocument string you wish to use.
It's a little counter-intuitive, it would be nice if you could just Document="{Binding PropertyName}" and be done with it, converting it to a FlowDocument on the fly... but the solution here is easy enough.
Let's say you have a datasource, and in that datasource, one of the datamembers is a string that contains some FlowDocument XAML. For example:
<Section xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
<Paragraph>This is a test.</Paragraph>
</Section> Unfortunately, there's no way to directly bind a string to a FlowDocument object. However, XAML databinding allows the use of custom converters that allows you to take that string and convert it to whatever you like. To do this, create a class:
Namespace Converters
<ValueConversion(GetType(Object), GetType(FlowDocument))> Public Class FlowDocumentConverter
Implements IValueConverter
Public Function Convert(ByVal objValue As Object, ByVal tTarget As Type, ByVal objParam As Object, _
ByVal ciCulture As CultureInfo) As Object Implements IValueConverter.Convert
Using msDocument As New MemoryStream((New ASCIIEncoding).GetBytes(CStr(objValue)))
Dim fdDocument As New FlowDocument()
Dim trDocument As New TextRange(fdDocument.ContentStart, fdDocument.ContentEnd)
trDocument.Load(msDocument, DataFormats.Xaml)
trDocument = Nothing
Return fdDocument
End Using
End Function
Public Function ConvertBack(ByVal objValue As Object, ByVal tTarget As Type, ByVal objParam As Object, _
ByVal ciCulture As CultureInfo) As Object Implements IValueConverter.ConvertBack
Return Nothing 'Not interested in converting back from a FlowDocument to a String
End Function
End Class
End Namespace Now add your xmlns to the page/usercontrol/window/whatever...
<Page ... xmlns:converters="clr-namespace:Converters" ... >
Create yourself some resources...
<Page.Resources>
<converter:FlowDocumentConverter x:Key="FlowDocumentConverter" />
</Page.Resources> And bind like so...
<FlowDocumentScrollViewer Document="{Binding PropertyName, Converter={StaticResource FlowDocumentConverter}}" /> Just replace "PropertyName" with the name of the property or column that has the XAML FlowDocument string you wish to use.
It's a little counter-intuitive, it would be nice if you could just Document="{Binding PropertyName}" and be done with it, converting it to a FlowDocument on the fly... but the solution here is easy enough.
Previous post:
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Shuffle Off To Buffalo
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Programming is fun again
Next in Coding:
Six Minutes To Release forums
Previously in VB.NET:
Changing app.config on the fly
Next in VB.NET:
Using the WoW Armory to determine class talents
Next in XAML:
XAML again?
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