In Silverlight 4 it is possible to use the StringFormat extention to format output from Data Binding. I was always looking for a way to remove the trailing decimals from a TextBlock that was bound to a Slider. Today I found the answer:
<TextBlock x:Name="txtWeight" Text="{Binding Value, ElementName=sldWeight, StringFormat=\{0:n0\}}"/>
This says: Use the result as a number with zero decimals.
Use StringFormat=\{0:n1\}} if you want one decimal and StringFormat=\{0:n2\}} for two decimals. You can also use StringFormat=p for Percentage, StringFormat=c for Currency…
The Designer Silverlight site has more details…
Njoy!
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