C#•2y ago

✅ How to get values of list using reflection?

Recently I wrote some logic to get values from enum:

private JArray GetOptions( Type type, CultureInfo culture )
{
    var fields = type.IsEnum
       ? type.GetFields(BindingFlags.Public | BindingFlags.Static)
       : type.GetGenericArguments()[0]
            .GetFields(BindingFlags.Public | BindingFlags.Static);

    return new JArray(fields.Select(field =>
    {
        var value = field.GetCustomAttribute<EnumMemberAttribute>()
                ?.Value ?? field.Name;

        var label =
           field.GetCustomAttribute<TitleLocalizedAttribute>()
               ?.ValueGet(field.Name, culture)
           ?? field.GetCustomAttribute<TitleAttribute>()?.Title
           ?? field.Name;

        return new JObject
        {
           ["label"] = label,
           ["value"] = value
        };
    } ) );
}

private JArray GetOptions( Type type, CultureInfo culture )
{
    var fields = type.IsEnum
       ? type.GetFields(BindingFlags.Public | BindingFlags.Static)
       : type.GetGenericArguments()[0]
            .GetFields(BindingFlags.Public | BindingFlags.Static);

    return new JArray(fields.Select(field =>
    {
        var value = field.GetCustomAttribute<EnumMemberAttribute>()
                ?.Value ?? field.Name;

        var label =
           field.GetCustomAttribute<TitleLocalizedAttribute>()
               ?.ValueGet(field.Name, culture)
           ?? field.GetCustomAttribute<TitleAttribute>()?.Title
           ?? field.Name;

        return new JObject
        {
           ["label"] = label,
           ["value"] = value
        };
    } ) );
}

everything works good, I can work with IEnumerable<T> or just T where T is Enum but now I need to get values from IEnumerable<string> or string: List<string> str {get;set;} = new() {"a","b"}; so I wanna fill Jarray with a and b. How can I do it? I apologize for the question posted. I'm just tired and not thinking straight

6 Replies

reflectronic•2y ago

foreach (var str in list)

SWEETPONYOP•2y ago

what all I have is type

reflectronic•2y ago

i don’t understand. a type doesn’t have values you need a list object where else do the values in the list come from

SWEETPONYOP•2y ago

ok, I will describe my task I have property with custom attribute

[UIControlCatalog]
public List<string> Items {get;set;} = new() {"a", "b", "c"};

[UIControlCatalog]
public List<string> Items {get;set;} = new() {"a", "b", "c"};

UIControlCatalog:
public class UIControlCatalogAttribute
    : UIControlAttribute
{
    public override void FillSchema(
        UISchemaItem schemaItem,
        PropertyInfo property,
        CultureInfo culture)
    {
          var isEnumerable = property.PropertyType.IsEnumerable();

          schemaItem.ParsecMetadata ??= new();
          schemaItem.ParsecMetadata.UIControlInputType = UIControlInputType.Catalog;

        schemaItem.ParsecMetadata.ComponentProperties = new()
        {
              ["multiple"] = isEnumerable,
              ["options"] = // place for items in list
        };
    }
}

UIControlCatalog:
public class UIControlCatalogAttribute
    : UIControlAttribute
{
    public override void FillSchema(
        UISchemaItem schemaItem,
        PropertyInfo property,
        CultureInfo culture)
    {
          var isEnumerable = property.PropertyType.IsEnumerable();

          schemaItem.ParsecMetadata ??= new();
          schemaItem.ParsecMetadata.UIControlInputType = UIControlInputType.Catalog;

        schemaItem.ParsecMetadata.ComponentProperties = new()
        {
              ["multiple"] = isEnumerable,
              ["options"] = // place for items in list
        };
    }
}

so I need to get values from Items and add it to ["options"] that's what I need

reflectronic•2y ago

is it always an IEnumerable<string>? and schemaItem is this, right? so you would get the value of the property using reflection, then cast it to IEnumerable<string>, then do foreach

SWEETPONYOP•2y ago

hm I think I can't get value of property using reflection I just have PropertyInfo

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✅ How to get values of list using reflection?