How to format TimeSpan in XAML

Question

I am trying to format a textblock which is bound to a TimeSpan property. It works if the property is of type DateTime but it fails if it is a

Answer 1

TimeSpan StringFormat with milliseconds:

<TextBlock Text="{Binding MyTime, StringFormat=\{0:hh\\:mm\\:ss\\.fff\}}"/>

Answer 2

StringFormat must be in the form of a format string. In this case it would look like:

<TextBlock Text="{Binding MyTime,StringFormat=`Time values are {0:hh\\:mm}`}"/>

Note: if you want to display the total number of hours and minutes and the timespan happens to be greater than 24 hours, there's a caveat with your approach: Here's a workaround.

Answer 3

WPF in .NET 4 now has timespan from strings http://msdn.microsoft.com/en-us/library/ee372286.aspx

I am using the following <TextBlock FontSize="12" Text="{Binding Path=TimeLeft, StringFormat={}{0:g}}" />