DbRawSqlQuery<TElement>.CountAsync Method
Definition
Important
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Overloads
| CountAsync() |
Asynchronously returns the number of elements in the query. |
| CountAsync(Func<TElement,Boolean>) |
Asynchronously returns the number of elements in the query that satisfy a condition. |
| CountAsync(CancellationToken) |
Asynchronously returns the number of elements in the query. |
| CountAsync(Func<TElement,Boolean>, CancellationToken) |
Asynchronously returns the number of elements in the query that satisfy a condition. |
CountAsync()
Asynchronously returns the number of elements in the query.
public System.Threading.Tasks.Task<int> CountAsync ();member this.CountAsync : unit -> System.Threading.Tasks.Task<int>Public Function CountAsync () As Task(Of Integer)Returns
A task that represents the asynchronous operation. The task result contains the number of elements in the query result.
Exceptions
The number of elements in the query result is larger than MaxValue .
Remarks
Multiple active operations on the same context instance are not supported. Use 'await' to ensure that any asynchronous operations have completed before calling another method on this context.
Applies to
CountAsync(Func<TElement,Boolean>)
Asynchronously returns the number of elements in the query that satisfy a condition.
public System.Threading.Tasks.Task<int> CountAsync (Func<TElement,bool> predicate);member this.CountAsync : Func<'Element, bool> -> System.Threading.Tasks.Task<int>Public Function CountAsync (predicate As Func(Of TElement, Boolean)) As Task(Of Integer)Parameters
Returns
A task that represents the asynchronous operation. The task result contains the number of elements in the query result that satisfy the condition in the predicate function.
Exceptions
The number of elements in the query result that satisfy the condition in the predicate function is larger than MaxValue .
Remarks
Multiple active operations on the same context instance are not supported. Use 'await' to ensure that any asynchronous operations have completed before calling another method on this context.
Applies to
CountAsync(CancellationToken)
Asynchronously returns the number of elements in the query.
public System.Threading.Tasks.Task<int> CountAsync (System.Threading.CancellationToken cancellationToken);member this.CountAsync : System.Threading.CancellationToken -> System.Threading.Tasks.Task<int>Parameters
- cancellationToken
- CancellationToken
A CancellationToken to observe while waiting for the task to complete.
Returns
A task that represents the asynchronous operation. The task result contains the number of elements in the query result.
Exceptions
The number of elements in the query result is larger than MaxValue .
Remarks
Multiple active operations on the same context instance are not supported. Use 'await' to ensure that any asynchronous operations have completed before calling another method on this context.
Applies to
CountAsync(Func<TElement,Boolean>, CancellationToken)
Asynchronously returns the number of elements in the query that satisfy a condition.
public System.Threading.Tasks.Task<int> CountAsync (Func<TElement,bool> predicate, System.Threading.CancellationToken cancellationToken);member this.CountAsync : Func<'Element, bool> * System.Threading.CancellationToken -> System.Threading.Tasks.Task<int>Parameters
- cancellationToken
- CancellationToken
A CancellationToken to observe while waiting for the task to complete.
Returns
A task that represents the asynchronous operation. The task result contains the number of elements in the query result that satisfy the condition in the predicate function.
Exceptions
The number of elements in the query result that satisfy the condition in the predicate function is larger than MaxValue .
Remarks
Multiple active operations on the same context instance are not supported. Use 'await' to ensure that any asynchronous operations have completed before calling another method on this context.
Applies to
Entity Framework