How to hide stringformat if data is null

Question

How to hide a stringformat when data is not present.Consider this sample

<TextBlock Text="{Binding Amount, StringFormat=Total: {0:C}}" />

in this case if Amount is null,Then it will show just Total:.How to hide this if Amount is null or empty

What are we considering?

linuxuser27
– linuxuser27

2010-09-15 18:23:54 +00:00
Commented Sep 15, 2010 at 18:23 — linuxuser27
– linuxuser27, Commented Sep 15, 2010 at 18:23

Community · Accepted Answer · 2017-05-23 12:26:12Z

35

You either have to implement some sort of value converter (Example) or consider using the TargetNullValue property on the binding (Example)

edited May 23, 2017 at 12:26

CommunityBot

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answered Sep 15, 2010 at 19:46

rudigrobler

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Comments

biju · Accepted Answer · 2010-12-08 13:12:10Z

35

"TargetNullValue" is what i was looking for.I ended up with this and it worked like a charm

<TextBlock VerticalAlignment="Top"
             Text="{Binding Path=TotalMonths,
        TargetNullValue={x:Static System:String.Empty},
        StringFormat=Total: {0:C}}" />

answered Dec 8, 2010 at 13:12

biju

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2 Comments

jpierson Over a year ago

Seems like you should give credit to rudigrobler and update your original post with these details.

DeveloperDan Over a year ago

Don't forget to add this namespace: xmlns:System="clr-namespace:System;assembly=mscorlib"

Lloyd Powell · Accepted Answer · 2012-08-17 12:40:13Z

22

TargetNullValue=''

Will do also

edited Aug 17, 2012 at 12:40

Lloyd Powell

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answered Dec 13, 2010 at 10:09

dave

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Comments

naacal · Accepted Answer · 2010-09-15 19:50:25Z

1

There's not much to work with here, but you can achieve something like this with:

DataTrigger
ValueConverter
EventHandling in Code-Behind
Binding on a (dependency-)property in a ViewModel encapsulating your business classes

answered Sep 15, 2010 at 19:50

naacal

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1 Comment

biju Over a year ago

I solved it using a value converter..but still helps to know any alternative approach...BTW cant handle in my business class since i am using datatables

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