Get error message when appear

Question

I have a textbox and is bound to a property.

public SapLanguage Language
{
    get { return _language; }
    set
    {
        _language = value;
        RaisePropertyChanged();
    }
}

The SapLanguage is type enum:

public enum SapLanguage
{
    DE,
    EN,
    FR,
    IT
}

The WPF looks like as follow:

<TextBox Grid.Row="3" Grid.Column="1" Margin="10,10,10,10" FontSize="26" FontWeight="Bold"
                     CharacterCasing="Upper"
                     HorizontalAlignment="Left" VerticalContentAlignment="Center" MaxLength="2" Width="60"
                     HorizontalContentAlignment="Center" Text="{Binding Language, StringFormat={} }">
</TextBox>

When I type a value in the textbox, that does not exist. It shows me an error:

How can I store the error message into a variable?

Check its Validation property, HasError property and Errors collection. There is also an Error event you can attach a trigger to. — Adriano Repetti, Jan 25 '16 at 10:27
Starting pont: https://msdn.microsoft.com/it-it/library/system.windows.controls.validation(v=vs.100).aspx — Adriano Repetti, Jan 25 '16 at 10:34
Why `TextBox`? See @FranzWimmer answer, `ComboBox` is preferable, then you don't need validation at all. — Sinatr, Jan 25 '16 at 11:13

score 2 · Accepted Answer · edited May 23 '17 at 11:59

2

For binding an enum to a TextBox you would need a converter class that implements the IValueConverter interface.

For displaying an enum, i wold prefer using a ComboBox instead, like this: https://stackoverflow.com/a/6145957/5764665

edited May 23 '17 at 11:59

Community

1
1

answered Jan 25 '16 at 11:00

Franz Wimmer

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Get error message when appear

1 Answers1