Async DataPortal call in private field property

[JacoJordaan]

I am busy changing my objects to use the async behaviour for dataportal calls to make Blazor webassembly to work.
I have many using relationship properties on my object that fetch the required data when the property is referenced.

I have tried the LazyGetPropertyAsync option, but this does not work with private backing fields.

What approach can I take to get this working?

Example of an existing property:

        public static readonly PropertyInfo<string> FileContentsProperty = RegisterProperty<string>(c => c.FileContents, RelationshipTypes.PrivateField);
        [NotUndoable, NonSerialized]
        private string _fileContents = null;
        public string FileContents
        {
            get
            {
                if (_fileContents == null)
                    _fileContents = GetFileContentsString();
                return GetProperty(FileContentsProperty, _fileContents);
            }
        }

The GetFileContentsString is a function that calls a command object:

        private string GetFileContentsString()
        {
            var cmd = FileGetCommand.GetFileContents(FilePath);

            return cmd.FileContents;
        }

[rockfordlhotka]

I believe this is what you need.

    public static readonly PropertyInfo<string> BigDataProperty = 
      RegisterProperty<string>(nameof(BigData), RelationshipTypes.PrivateField);
    [NotUndoable, NonSerialized]
    private string _name = BigDataProperty.DefaultValue;
    public string BigData
    {
      get
#pragma warning disable CSLA0007 // Evaluate Properties for Simplicity
      {
        if (string.IsNullOrWhiteSpace(_name))
        {
          Task.Run(async () => 
          {
            var result = await DataPortal.FetchAsync<BigDataLoader>(Id);
            _name = result.BigData;
            OnPropertyChanged(nameof(BigData));
          });
          return BigDataProperty.DefaultValue;
        }
        return GetProperty(BigDataProperty, _name);
      }
#pragma warning restore CSLA0007 // Evaluate Properties for Simplicity
    }

[JacoJordaan]

Excellent, thank you!