IAggregateFluentExtensionsLookupTResult Method (IAggregateFluentTResult, String, FieldDefinitionTResult, FieldDefinitionBsonDocument, FieldDefinitionBsonDocument) |
Appends a lookup stage to the pipeline.
Namespace:
MongoDB.Driver
Assembly:
MongoDB.Driver (in MongoDB.Driver.dll) Version: 2.8.0+cc573f3e1f48f39162b4b680e921a623e127e8fa
Syntax public static IAggregateFluent<BsonDocument> Lookup<TResult>(
this IAggregateFluent<TResult> aggregate,
string foreignCollectionName,
FieldDefinition<TResult> localField,
FieldDefinition<BsonDocument> foreignField,
FieldDefinition<BsonDocument> as
)
<ExtensionAttribute>
Public Shared Function Lookup(Of TResult) (
aggregate As IAggregateFluent(Of TResult),
foreignCollectionName As String,
localField As FieldDefinition(Of TResult),
foreignField As FieldDefinition(Of BsonDocument),
as As FieldDefinition(Of BsonDocument)
) As IAggregateFluent(Of BsonDocument)
[<ExtensionAttribute>]
static member Lookup :
aggregate : IAggregateFluent<'TResult> *
foreignCollectionName : string *
localField : FieldDefinition<'TResult> *
foreignField : FieldDefinition<BsonDocument> *
as : FieldDefinition<BsonDocument> -> IAggregateFluent<BsonDocument>
Parameters
- aggregate
- Type: MongoDB.DriverIAggregateFluentTResult
The aggregate. - foreignCollectionName
- Type: SystemString
Name of the foreign collection. - localField
- Type: MongoDB.DriverFieldDefinitionTResult
The local field. - foreignField
- Type: MongoDB.DriverFieldDefinitionBsonDocument
The foreign field. - as
- Type: MongoDB.DriverFieldDefinitionBsonDocument
The field in the result to place the foreign matches.
Type Parameters
- TResult
- The type of the result.
Return Value
Type:
IAggregateFluentBsonDocumentThe fluent aggregate interface.
Usage Note
In Visual Basic and C#, you can call this method as an instance method on any object of type
IAggregateFluentTResult. When you use instance method syntax to call this method, omit the first parameter. For more information, see
Extension Methods (Visual Basic) or
Extension Methods (C# Programming Guide).
See Also