XPQueryExtensions.FirstOrDefaultAsync<T>(IQueryable<T>, Expression<Func<T, Boolean>>, CancellationToken) Method
Asynchronously gets the first object that meets specified requirements in a selection. If the selection is empty, returns a default value for <T>.
Namespace: DevExpress.Xpo
Assembly: DevExpress.Xpo.v20.2.dll
NuGet Package: DevExpress.Xpo
NuGet Packages: DevExpress.WindowsDesktop.Xpo, DevExpress.Xpo
Declaration
Parameters
Name | Type | Description |
---|---|---|
query | IQueryable<T> | An XPQuery<T> that specifies a selection of persistent objects. |
predicate | Expression<Func<T, Boolean>> | An expression which determines requirements the persistent object needs to meet. |
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 first object to meet specified requirements in a selection or a default value for <T>. |