DbRawSqlQuery<TElement>.LongCountAsync Method
Asynchronously returns an Int64 that represents the total number of elements in the query.
Assembly: EntityFramework (in EntityFramework.dll)
Name | Description | |
---|---|---|
![]() | LongCountAsync() | Asynchronously returns an Int64 that represents the total number of elements in the query. |
![]() | LongCountAsync(CancellationToken) | Asynchronously returns an Int64 that represents the total number of elements in the query. |
![]() | LongCountAsync(Func<TElement, Boolean>) | Asynchronously returns an Int64 that represents the number of elements in the query that satisfy a condition. |
![]() | LongCountAsync(Func<TElement, Boolean>, CancellationToken) | Asynchronously returns an Int64 that represents the number of elements in the query that satisfy a condition. |
DbRawSqlQuery<TElement>.LongCountAsync Method ()
Asynchronously returns an Int64 that represents the total number of elements in the query.
Exception | Condition |
---|---|
OverflowException | The number of elements in the query result is larger than MaxValue . |
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.
DbRawSqlQuery<TElement>.LongCountAsync Method (CancellationToken)
Asynchronously returns an Int64 that represents the total number of elements in the query.
Parameters
- cancellationToken
-
Type:
System.Threading.CancellationToken
A CancellationToken to observe while waiting for the task to complete.
Return Value
Type: System.Threading.Tasks.Task<Int64>A task that represents the asynchronous operation. The task result contains the number of elements in the query result.
Exception | Condition |
---|---|
OverflowException | The number of elements in the query result is larger than MaxValue . |
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.
DbRawSqlQuery<TElement>.LongCountAsync Method (Func<TElement, Boolean>)
Asynchronously returns an Int64 that represents the number of elements in the query that satisfy a condition.
Parameters
- predicate
-
Type:
System.Func<TElement, Boolean>
A function to test each element for a condition.
Return Value
Type: System.Threading.Tasks.Task<Int64>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.
Exception | Condition |
---|---|
OverflowException | The number of elements in the query result that satisfy the condition in the predicate function is larger than MaxValue . |
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.
DbRawSqlQuery<TElement>.LongCountAsync Method (Func<TElement, Boolean>, CancellationToken)
Asynchronously returns an Int64 that represents the number of elements in the query that satisfy a condition.
public Task<long> LongCountAsync( Func<TElement, bool> predicate, CancellationToken cancellationToken )
Parameters
- predicate
-
Type:
System.Func<TElement, Boolean>
A function to test each element for a condition.
- cancellationToken
-
Type:
System.Threading.CancellationToken
A CancellationToken to observe while waiting for the task to complete.
Return Value
Type: System.Threading.Tasks.Task<Int64>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.
Exception | Condition |
---|---|
OverflowException | The number of elements in the query result that satisfy the condition in the predicate function is larger than MaxValue . |
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.