How to use stringformat in multibinding in WPF XAML

Question

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

Thomas Levesque · Accepted Answer · 2012-06-13T12:47:47.480

60

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)

edited Jun 13 '12 at 12:47

answered Jun 13 '12 at 12:25

Thomas Levesque

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Well, thx for your quick response but can you explain this briefly if it is possible in your answer? – ibrahimyilmaz Jun 13 '12 at 12:31
@ibrahimyilmaz, sorry, I thought the code was self explanatory... I added a short explanation. – Thomas Levesque Jun 13 '12 at 12:48
1

Hmmm. I've always been under the impression that `` 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? – Peter Duniho Jun 29 '19 at 23:59
Oh that's exactly I needed. The StringFormat in Bindings are totally ignored. I was so frustrated. – zORg Alex Sep 16 '19 at 07:16

score 9 · Answer 2 · answered Sep 24 '13 at 06:45

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

Shawn Kendrot · Answer 3 · 2012-06-13T18:22:22.537

6

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>

edited Jun 13 '12 at 18:22

answered Jun 13 '12 at 15:40

Shawn Kendrot

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Between the 2 `Run`s will be a space. That's not like `StringFormat="{}{0:F1}{1:F1}"` mentioned above. Even writing `` will succeed only until you won't format XAML (like ReSharper does) and end up in `[CRLF][CRLF]` – Marcel Jan 12 '17 at 14:04

How to use stringformat in multibinding in WPF XAML

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