XPQueryExtensions.SingleOrDefaultAsync<T>(IQueryable<T>, CancellationToken) Method
Asynchronously gets the only object in a selection. If the selection is empty, returns a default value for <T>. If the selection has more than one element, throws an exception.
Namespace: DevExpress.Xpo
Assembly: DevExpress.Xpo.v18.2.dll
Declaration
public static Task<T> SingleOrDefaultAsync<T>(
this IQueryable<T> query,
CancellationToken cancellationToken = default(CancellationToken)
)
Parameters
Name | Type | Description |
---|---|---|
query | IQueryable<T> | An XPQuery<T> that specifies a selection of persistent objects. |
Optional Parameters
Name | Type | Default | Description |
---|---|---|---|
cancellationToken | CancellationToken | *null* | A CancellationToken object that delivers a cancellation notice to the running operation. |
Type Parameters
Name |
---|
T |
Returns
Type | Description |
---|---|
Task<T> | A Task that returns the only object in a selection. |
See Also