As you know StringFormat is of great importance for data representation in WPF. My problem is how to use StringFormat when multibinding in WPF?
If I give a very simple example:
We have variables,which are A and B and whose values are 10.255555 and 25.6999999
And we want to show them 10.2,25.6?
How can I do this with multibinding? Normally it is piece of cake with ValueConverter
Any help and ideas on this topic will be greately appreciated
Just set the StringFormat property on the MultiBinding; use placeholders ({0}, {1}...) for each binding in the multibinding, and include format specifiers if necessary (e.g. F1 for a decimal number with 1 decimal digit)
<TextBlock>
<TextBlock.Text>
<MultiBinding StringFormat="{}{0:F1}{1:F1}">
<Binding Path="A" />
<Binding Path="B" />
</MultiBinding>
</TextBlock.Text>
</TextBlock>
The {} part at the beginning is the format string is an escape sequence (otherwise the XAML parser would consider { to be the beginning of a markup extension)
<MultiBinding/> required a converter. And indeed, when I attempt to set a multibinding as above, I get "Cannot set MultiBinding because MultiValueConverter must be specified" at runtime. So...what's the secret sauce to get this answer to work?
If anyone is looking for "Time Formats" this is for 24hr Clock which is how I came to this post:
<TextBlock TextAlignment="Center">
<TextBlock.Text>
<MultiBinding StringFormat="{}{0:HH:mm} - {1:HH:mm}">
<Binding Path="StartTime" />
<Binding Path="EndTime" />
</MultiBinding>
</TextBlock.Text>
</TextBlock>
The leading 0: and 1: are the reference to the Bindings
[0:hh:mm tt] to display AM/PM
To simplify you could use two TextBlock/Labels to display the values.
If you are using .Net4, you can bind in a Run Inline element of a TextBlock
<TextBlock>
<Run Text="{Binding A, StringFormat={}{0:F1}}"/>
<Run Text="{Binding B, StringFormat={}{0:F1}}"/>
</TextBlock>
Runs will be a space. That's not like StringFormat="{}{0:F1}{1:F1}" mentioned above. Even writing <Run /><Run /><Run /> will succeed only until you won't format XAML (like ReSharper does) and end up in <Run />[CRLF]<Run />[CRLF]<Run />