The 'Prop' Class

This static class has several handy methods for getting string property paths from lambda expressions. Which can help to eliminate magic strings from your code during advanced scenarios.

Prop.Path()

Returns the full dotted path for a given member expression.

Authors[0].Books[0].Title > Authors.Books.Title

    var path = Prop.Path<Book>(b => b.Authors[0].Books[0].Title);

Prop.Property()

Returns the last property name for a given member expression.

Authors[0].Books[0].Title > Title

    var propName = Prop.Property<Book>(b => b.Authors[0].Books[0].Title);

Prop.Collection()

Returns the collection/entity name for a given entity type.

    var collectionName = Prop.Collection<Book>();

Prop.PosAll()

Returns a path with the all positional operator $[] for a given expression.

Authors[0].Name > Authors.$[].Name

    var path = Prop.PosAll<Book>(b => b.Authors[0].Name);

Prop.PosFirst()

Returns a path with the first positional operator $ for a given expression.

Authors[0].Name > Authors.$.Name

    var path = Prop.PosFirst<Book>(b => b.Authors[0].Name);

Prop.PosFiltered()

Returns a path with filtered positional identifiers $[x] for a given expression.

Authors[0].Name > Authors.$[a].Name

Authors[1].Age > Authors.$[b].Age

Authors[2].Books[3].Title > Authors.\([c].Books.\)[d].Title

Index positions start from [0] which is converted to $[a] and so on.

    var path = Prop.PosFiltered<Book>(b => b.Authors[2].Books[3].Title);

Prop.Elements(index, expression)

Returns a path with the filtered positional identifier prepended to the property path.

(0, x => x.Rating) > a.Rating

(1, x => x.Rating) > b.Rating

Index positions start from '0' which is converted to 'a' and so on.

    var res = Prop.Elements<Book>(0, x => x.Rating);

Prop.Elements()

Returns a path without any filtered positional identifier prepended to it.

b => b.Tags > Tags

    var path = Prop.Elements<Book>(b => b.Tags);