StringFormat doesn't seem to react

Question

I have the following binding in my xaml, I can see the double value shown however the StringFormat is completely ignored.

<Label Content="{Binding ByteCount, StringFormat=n}"/>

ByteCount property is of type double. I even changed it even to string and it still doesn't work.

What could be the reason please?

Update:

public double ByteCount
{
            get
            {
                return CloneHelper.GetSize(this);
            }
}

public static class CloneHelper
    {
        public static double GetSize(BookSetViewModel book)
        {
            .....

            return total;
        }
}

Perhaps you can include the actual binding in your question? (btw: a ByteCount property represented as a double!?) — Willem van Rumpt
– Willem van Rumpt, Commented Oct 31, 2011 at 12:54
If ByteCount is an int, you might be missing a converter. — Dmitri Nesteruk
– Dmitri Nesteruk, Commented Oct 31, 2011 at 12:55
try removing Mode=TwoWay first, don't see any sense of it with Label — Sergei B.
– Sergei B., Commented Oct 31, 2011 at 12:58
Does the output window in Visual Studio report any BindingExpression failures? — Willem van Rumpt
– Willem van Rumpt, Commented Oct 31, 2011 at 13:00

Rachel · Accepted Answer · 2011-10-31 13:21:11Z

6

WPF's Label actually has a ContentStringFormat property which overwrites whatever the binding's StringFormat is

Set ContentStringFormat instead

<Label Content="{Binding ByteCount}" ContentStringFormat="n" />

answered Oct 31, 2011 at 13:21

Rachel

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2 Comments

Houman Over a year ago

You are a star Rachel. Amazing found, this was it!!! :) Is this the same for silverlight? I need to test this...

Rachel Over a year ago

@Kave I'm not sure if it's the same for Silverlight, but I would assume so. Should be easy to write a quick test and find out.

Eric Olsson · Accepted Answer · 2011-10-31 13:08:47Z

0

The StringFormat property has peculiar syntax which you have to use.

For your example, you should use this snippet.

<Label Content="{Binding ByteCount, StringFormat={}{0:n}}" />

Here's a link to the MSDN page for the StringFormat property.

answered Oct 31, 2011 at 13:08

Eric Olsson

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2 Comments

Willem van Rumpt Over a year ago

It works perfectly well without, the {} is just there to escape the curly braces. "StringFormat=n" should work (and works here) too.

Houman Over a year ago

I think you miss a } at the end before ". Nonetheless it doesn't work either. I don't understand...

Sergei B. · Accepted Answer · 2011-10-31 13:21:47Z

0

Have no idea what is the reason, maybe because of target type (for label it is object), but it works ok for the TextBlock:

<TextBlock Text="{Binding ByteCount, StringFormat=n}"/>

answered Oct 31, 2011 at 13:21

Sergei B.

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