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IMongoCollectionExtensionsDistinctAsyncTDocument, TField Method (IMongoCollectionTDocument, IClientSessionHandle, FieldDefinitionTDocument, TField, ExpressionFuncTDocument, Boolean, DistinctOptions, CancellationToken)

Gets the distinct values for a specified field.

Namespace:  MongoDB.Driver
Assembly:  MongoDB.Driver (in MongoDB.Driver.dll) Version: 2.19.1+3a2a09dd959482f665ffbb5df2557ec541597af4
Syntax
public static Task<IAsyncCursor<TField>> DistinctAsync<TDocument, TField>(
	this IMongoCollection<TDocument> collection,
	IClientSessionHandle session,
	FieldDefinition<TDocument, TField> field,
	Expression<Func<TDocument, bool>> filter,
	DistinctOptions options = null,
	CancellationToken cancellationToken = default
)

Parameters

collection
Type: MongoDB.DriverIMongoCollectionTDocument
The collection.
session
Type: MongoDB.DriverIClientSessionHandle
The session.
field
Type: MongoDB.DriverFieldDefinitionTDocument, TField
The field.
filter
Type: System.Linq.ExpressionsExpressionFuncTDocument, Boolean
The filter.
options (Optional)
Type: MongoDB.DriverDistinctOptions
The options.
cancellationToken (Optional)
Type: System.ThreadingCancellationToken
The cancellation token.

Type Parameters

TDocument
The type of the document.
TField
The type of the result.

Return Value

Type: TaskIAsyncCursorTField
The distinct values for the specified field.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IMongoCollectionTDocument. 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