git_brcal/src/BreCalClient/EnumHelper.cs

72 lines
2.0 KiB
C#

// Copyright (c) 2024- schick Informatik
// Description: Helpers to display localized Enum values in Comboboxes
// https://stackoverflow.com/questions/29658721/enum-in-wpf-comboxbox-with-localized-names
//
using System;
using System.Globalization;
using System.Windows.Data;
using System.Windows.Markup;
namespace BreCalClient
{
#region class EnumToStringConverter
public sealed class EnumToStringConverter : IValueConverter
{
public object? Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
if (value == null)
{ return null; }
return Resources.Resources.ResourceManager.GetString(value.ToString() ?? "");
}
public object? ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
string str = (string)value;
foreach (object enumValue in Enum.GetValues(targetType))
{
if (str == Resources.Resources.ResourceManager.GetString(enumValue.ToString() ?? ""))
{ return enumValue; }
}
return null;
}
}
#endregion
#region class EnumerateExtension
public sealed class EnumerateExtension : MarkupExtension
{
public Type Type { get; set; }
public EnumerateExtension(Type type)
{
this.Type = type;
}
public override object ProvideValue(IServiceProvider serviceProvider)
{
string[] names = Enum.GetNames(Type);
// skip value "0" == "Unknown" (we dont want this selectable in the Combobox)
// NOTE: This will only work in the future if the first element is always "undefined" aka unused
string[] values = new string[names.Length - 1];
for (int i = 0; i < names.Length - 1; i++)
{
values[i] = Resources.Resources.ResourceManager.GetString(names[i + 1]) ?? names[i];
}
return values;
}
}
#endregion
}