WPF: Localization and IValueConverter

  • Thread starter Thread starter Wonko the Sane
  • Start date Start date
W

Wonko the Sane

Hello All,

I am having an issue with decimal separators and localization. Assume that
I have set Regional Settings to, say, German, where the decimal separator is
a comma.

When I bind directly to a Double value, the value shows up correctly.

However, if I go through a data converter, the value is always coming back
with a decimal point (period).

See abbreviated code example below.

Thanks,
WtS

<!-- In XAML - DataContext set to a DataTable -->
<TextBlock Text={Binding Converter={StaticResource SomeConverter},
ConverterParameter=SomeKey} />

// IValueConverter class example - usually has more error checking, etc.
class SomeConverter : IValueConverter
{
public object Convert(...)
{
DataTable dt = (DataTable) value;
String key = parameter.ToString();
DataRow [] rows = dt.Select("Data = '" + key + "'");

return Double.Parse(rows[0]["CurrentValue"].ToString());
}
}
 
Hi WtS,

I performed a test on this issue. In my test, I set the Region Settings to
German(Germany) and bind a TextBlock's Text property directly to a Double
value. However the value still shows up with a decimal point(period).

Anyway, a solution to your problem is to call the Double.ToString method
and pass the current CultureInfo to it.

The following is the modified value converter:

class SomeConverter : IValueConverter
{
public object Convert(...)
{
DataTable dt = (DataTable) value;
String key = parameter.ToString();
DataRow [] rows = dt.Select("Data = '" + key + "'");
System.Globalization.CultureInfo currentCI =
System.Threading.Thread.CurrentThread.CurrentCulture;
if(targetType == typeof(string))
{
return ((double)rows[0]["CurrentValue"]).ToString(currentCI);
}
else
{
return Double.Parse(rows[0]["CurrentValue"].ToString());
}
}
}

Please try my suggestion to see if it works.
If you have any question, please feel free to let me know.

Sincerely,
Linda Liu
Microsoft Online Community Support

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