EntityFrameworkQueryableExtensions.AverageAsync Method
Definition
Important
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Overloads
| AverageAsync(IQueryable<Single>, CancellationToken) |
Asynchronously computes the average of a sequence of values. |
| AverageAsync(IQueryable<Nullable<Single>>, CancellationToken) |
Asynchronously computes the average of a sequence of values. |
| AverageAsync(IQueryable<Nullable<Int64>>, CancellationToken) |
Asynchronously computes the average of a sequence of values. |
| AverageAsync(IQueryable<Nullable<Int32>>, CancellationToken) |
Asynchronously computes the average of a sequence of values. |
| AverageAsync(IQueryable<Nullable<Double>>, CancellationToken) |
Asynchronously computes the average of a sequence of values. |
| AverageAsync(IQueryable<Int64>, CancellationToken) |
Asynchronously computes the average of a sequence of values. |
| AverageAsync(IQueryable<Int32>, CancellationToken) |
Asynchronously computes the average of a sequence of values. |
| AverageAsync(IQueryable<Double>, CancellationToken) |
Asynchronously computes the average of a sequence of values. |
| AverageAsync(IQueryable<Decimal>, CancellationToken) |
Asynchronously computes the average of a sequence of values. |
| AverageAsync(IQueryable<Nullable<Decimal>>, CancellationToken) |
Asynchronously computes the average of a sequence of values. |
| AverageAsync<TSource>(IQueryable<TSource>, Expression<Func<TSource,Nullable<Int32>>>, CancellationToken) |
Asynchronously computes the average of a sequence of values that is obtained by invoking a projection function on each element of the input sequence. |
| AverageAsync<TSource>(IQueryable<TSource>, Expression<Func<TSource,Single>>, CancellationToken) |
Asynchronously computes the average of a sequence of values that is obtained by invoking a projection function on each element of the input sequence. |
| AverageAsync<TSource>(IQueryable<TSource>, Expression<Func<TSource,Nullable<Single>>>, CancellationToken) |
Asynchronously computes the average of a sequence of values that is obtained by invoking a projection function on each element of the input sequence. |
| AverageAsync<TSource>(IQueryable<TSource>, Expression<Func<TSource,Nullable<Int64>>>, CancellationToken) |
Asynchronously computes the average of a sequence of values that is obtained by invoking a projection function on each element of the input sequence. |
| AverageAsync<TSource>(IQueryable<TSource>, Expression<Func<TSource,Nullable<Double>>>, CancellationToken) |
Asynchronously computes the average of a sequence of values that is obtained by invoking a projection function on each element of the input sequence. |
| AverageAsync<TSource>(IQueryable<TSource>, Expression<Func<TSource,Nullable<Decimal>>>, CancellationToken) |
Asynchronously computes the average of a sequence of values that is obtained by invoking a projection function on each element of the input sequence. |
| AverageAsync<TSource>(IQueryable<TSource>, Expression<Func<TSource,Int64>>, CancellationToken) |
Asynchronously computes the average of a sequence of values that is obtained by invoking a projection function on each element of the input sequence. |
| AverageAsync<TSource>(IQueryable<TSource>, Expression<Func<TSource,Int32>>, CancellationToken) |
Asynchronously computes the average of a sequence of values that is obtained by invoking a projection function on each element of the input sequence. |
| AverageAsync<TSource>(IQueryable<TSource>, Expression<Func<TSource,Double>>, CancellationToken) |
Asynchronously computes the average of a sequence of values that is obtained by invoking a projection function on each element of the input sequence. |
| AverageAsync<TSource>(IQueryable<TSource>, Expression<Func<TSource,Decimal>>, CancellationToken) |
Asynchronously computes the average of a sequence of values that is obtained by invoking a projection function on each element of the input sequence. |
AverageAsync(IQueryable<Single>, CancellationToken)
Asynchronously computes the average of a sequence of values.
public static System.Threading.Tasks.Task<float> AverageAsync (this System.Linq.IQueryable<float> source, System.Threading.CancellationToken cancellationToken = default);static member AverageAsync : System.Linq.IQueryable<single> * System.Threading.CancellationToken -> System.Threading.Tasks.Task<single><Extension()>
Public Function AverageAsync (source As IQueryable(Of Single), Optional cancellationToken As CancellationToken = Nothing) As Task(Of Single)Parameters
- source
- IQueryable<Single>
A sequence of values to calculate the average of.
- 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 average of the sequence of values.
Exceptions
source is null.
source contains no elements.
If the CancellationToken is canceled.
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. See Avoiding DbContext threading issues for more information and examples.
See Querying data with EF Core for more information and examples.
Applies to
AverageAsync(IQueryable<Nullable<Single>>, CancellationToken)
Asynchronously computes the average of a sequence of values.
public static System.Threading.Tasks.Task<float?> AverageAsync (this System.Linq.IQueryable<float?> source, System.Threading.CancellationToken cancellationToken = default);static member AverageAsync : System.Linq.IQueryable<Nullable<single>> * System.Threading.CancellationToken -> System.Threading.Tasks.Task<Nullable<single>><Extension()>
Public Function AverageAsync (source As IQueryable(Of Nullable(Of Single)), Optional cancellationToken As CancellationToken = Nothing) As Task(Of Nullable(Of Single))Parameters
- source
- IQueryable<Nullable<Single>>
A sequence of values to calculate the average of.
- 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 average of the sequence of values.
Exceptions
source is null.
If the CancellationToken is canceled.
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. See Avoiding DbContext threading issues for more information and examples.
See Querying data with EF Core for more information and examples.
Applies to
AverageAsync(IQueryable<Nullable<Int64>>, CancellationToken)
Asynchronously computes the average of a sequence of values.
public static System.Threading.Tasks.Task<double?> AverageAsync (this System.Linq.IQueryable<long?> source, System.Threading.CancellationToken cancellationToken = default);static member AverageAsync : System.Linq.IQueryable<Nullable<int64>> * System.Threading.CancellationToken -> System.Threading.Tasks.Task<Nullable<double>><Extension()>
Public Function AverageAsync (source As IQueryable(Of Nullable(Of Long)), Optional cancellationToken As CancellationToken = Nothing) As Task(Of Nullable(Of Double))Parameters
- source
- IQueryable<Nullable<Int64>>
A sequence of values to calculate the average of.
- 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 average of the sequence of values.
Exceptions
source is null.
If the CancellationToken is canceled.
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. See Avoiding DbContext threading issues for more information and examples.
See Querying data with EF Core for more information and examples.
Applies to
AverageAsync(IQueryable<Nullable<Int32>>, CancellationToken)
Asynchronously computes the average of a sequence of values.
public static System.Threading.Tasks.Task<double?> AverageAsync (this System.Linq.IQueryable<int?> source, System.Threading.CancellationToken cancellationToken = default);static member AverageAsync : System.Linq.IQueryable<Nullable<int>> * System.Threading.CancellationToken -> System.Threading.Tasks.Task<Nullable<double>><Extension()>
Public Function AverageAsync (source As IQueryable(Of Nullable(Of Integer)), Optional cancellationToken As CancellationToken = Nothing) As Task(Of Nullable(Of Double))Parameters
- source
- IQueryable<Nullable<Int32>>
A sequence of values to calculate the average of.
- 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 average of the sequence of values.
Exceptions
source is null.
If the CancellationToken is canceled.
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. See Avoiding DbContext threading issues for more information and examples.
See Querying data with EF Core for more information and examples.
Applies to
AverageAsync(IQueryable<Nullable<Double>>, CancellationToken)
Asynchronously computes the average of a sequence of values.
public static System.Threading.Tasks.Task<double?> AverageAsync (this System.Linq.IQueryable<double?> source, System.Threading.CancellationToken cancellationToken = default);static member AverageAsync : System.Linq.IQueryable<Nullable<double>> * System.Threading.CancellationToken -> System.Threading.Tasks.Task<Nullable<double>><Extension()>
Public Function AverageAsync (source As IQueryable(Of Nullable(Of Double)), Optional cancellationToken As CancellationToken = Nothing) As Task(Of Nullable(Of Double))Parameters
- source
- IQueryable<Nullable<Double>>
A sequence of values to calculate the average of.
- 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 average of the sequence of values.
Exceptions
source is null.
If the CancellationToken is canceled.
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. See Avoiding DbContext threading issues for more information and examples.
See Querying data with EF Core for more information and examples.
Applies to
AverageAsync(IQueryable<Int64>, CancellationToken)
Asynchronously computes the average of a sequence of values.
public static System.Threading.Tasks.Task<double> AverageAsync (this System.Linq.IQueryable<long> source, System.Threading.CancellationToken cancellationToken = default);static member AverageAsync : System.Linq.IQueryable<int64> * System.Threading.CancellationToken -> System.Threading.Tasks.Task<double><Extension()>
Public Function AverageAsync (source As IQueryable(Of Long), Optional cancellationToken As CancellationToken = Nothing) As Task(Of Double)Parameters
- source
- IQueryable<Int64>
A sequence of values to calculate the average of.
- 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 average of the sequence of values.
Exceptions
source is null.
source contains no elements.
If the CancellationToken is canceled.
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. See Avoiding DbContext threading issues for more information and examples.
See Querying data with EF Core for more information and examples.
Applies to
AverageAsync(IQueryable<Int32>, CancellationToken)
Asynchronously computes the average of a sequence of values.
public static System.Threading.Tasks.Task<double> AverageAsync (this System.Linq.IQueryable<int> source, System.Threading.CancellationToken cancellationToken = default);static member AverageAsync : System.Linq.IQueryable<int> * System.Threading.CancellationToken -> System.Threading.Tasks.Task<double><Extension()>
Public Function AverageAsync (source As IQueryable(Of Integer), Optional cancellationToken As CancellationToken = Nothing) As Task(Of Double)Parameters
- source
- IQueryable<Int32>
A sequence of values to calculate the average of.
- 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 average of the sequence of values.
Exceptions
source is null.
source contains no elements.
If the CancellationToken is canceled.
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. See Avoiding DbContext threading issues for more information and examples.
See Querying data with EF Core for more information and examples.
Applies to
AverageAsync(IQueryable<Double>, CancellationToken)
Asynchronously computes the average of a sequence of values.
public static System.Threading.Tasks.Task<double> AverageAsync (this System.Linq.IQueryable<double> source, System.Threading.CancellationToken cancellationToken = default);static member AverageAsync : System.Linq.IQueryable<double> * System.Threading.CancellationToken -> System.Threading.Tasks.Task<double><Extension()>
Public Function AverageAsync (source As IQueryable(Of Double), Optional cancellationToken As CancellationToken = Nothing) As Task(Of Double)Parameters
- source
- IQueryable<Double>
A sequence of values to calculate the average of.
- 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 average of the sequence of values.
Exceptions
source is null.
source contains no elements.
If the CancellationToken is canceled.
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. See Avoiding DbContext threading issues for more information and examples.
See Querying data with EF Core for more information and examples.
Applies to
AverageAsync(IQueryable<Decimal>, CancellationToken)
Asynchronously computes the average of a sequence of values.
public static System.Threading.Tasks.Task<decimal> AverageAsync (this System.Linq.IQueryable<decimal> source, System.Threading.CancellationToken cancellationToken = default);static member AverageAsync : System.Linq.IQueryable<decimal> * System.Threading.CancellationToken -> System.Threading.Tasks.Task<decimal><Extension()>
Public Function AverageAsync (source As IQueryable(Of Decimal), Optional cancellationToken As CancellationToken = Nothing) As Task(Of Decimal)Parameters
- source
- IQueryable<Decimal>
A sequence of values to calculate the average of.
- 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 average of the sequence of values.
Exceptions
source is null.
source contains no elements.
If the CancellationToken is canceled.
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. See Avoiding DbContext threading issues for more information and examples.
See Querying data with EF Core for more information and examples.
Applies to
AverageAsync(IQueryable<Nullable<Decimal>>, CancellationToken)
Asynchronously computes the average of a sequence of values.
public static System.Threading.Tasks.Task<decimal?> AverageAsync (this System.Linq.IQueryable<decimal?> source, System.Threading.CancellationToken cancellationToken = default);static member AverageAsync : System.Linq.IQueryable<Nullable<decimal>> * System.Threading.CancellationToken -> System.Threading.Tasks.Task<Nullable<decimal>><Extension()>
Public Function AverageAsync (source As IQueryable(Of Nullable(Of Decimal)), Optional cancellationToken As CancellationToken = Nothing) As Task(Of Nullable(Of Decimal))Parameters
- source
- IQueryable<Nullable<Decimal>>
A sequence of values to calculate the average of.
- 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 average of the sequence of values.
Exceptions
source is null.
If the CancellationToken is canceled.
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. See Avoiding DbContext threading issues for more information and examples.
See Querying data with EF Core for more information and examples.
Applies to
AverageAsync<TSource>(IQueryable<TSource>, Expression<Func<TSource,Nullable<Int32>>>, CancellationToken)
Asynchronously computes the average of a sequence of values that is obtained by invoking a projection function on each element of the input sequence.
public static System.Threading.Tasks.Task<double?> AverageAsync<TSource> (this System.Linq.IQueryable<TSource> source, System.Linq.Expressions.Expression<Func<TSource,int?>> selector, System.Threading.CancellationToken cancellationToken = default);static member AverageAsync : System.Linq.IQueryable<'Source> * System.Linq.Expressions.Expression<Func<'Source, Nullable<int>>> * System.Threading.CancellationToken -> System.Threading.Tasks.Task<Nullable<double>><Extension()>
Public Function AverageAsync(Of TSource) (source As IQueryable(Of TSource), selector As Expression(Of Func(Of TSource, Nullable(Of Integer))), Optional cancellationToken As CancellationToken = Nothing) As Task(Of Nullable(Of Double))Type Parameters
- TSource
The type of the elements of source.
Parameters
- source
- IQueryable<TSource>
A sequence of values of type TSource.
- selector
- Expression<Func<TSource,Nullable<Int32>>>
A projection function to apply to each element.
- 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 average of the projected values.
Exceptions
source or selector is null.
If the CancellationToken is canceled.
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. See Avoiding DbContext threading issues for more information and examples.
See Querying data with EF Core for more information and examples.
Applies to
AverageAsync<TSource>(IQueryable<TSource>, Expression<Func<TSource,Single>>, CancellationToken)
Asynchronously computes the average of a sequence of values that is obtained by invoking a projection function on each element of the input sequence.
public static System.Threading.Tasks.Task<float> AverageAsync<TSource> (this System.Linq.IQueryable<TSource> source, System.Linq.Expressions.Expression<Func<TSource,float>> selector, System.Threading.CancellationToken cancellationToken = default);static member AverageAsync : System.Linq.IQueryable<'Source> * System.Linq.Expressions.Expression<Func<'Source, single>> * System.Threading.CancellationToken -> System.Threading.Tasks.Task<single><Extension()>
Public Function AverageAsync(Of TSource) (source As IQueryable(Of TSource), selector As Expression(Of Func(Of TSource, Single)), Optional cancellationToken As CancellationToken = Nothing) As Task(Of Single)Type Parameters
- TSource
The type of the elements of source.
Parameters
- source
- IQueryable<TSource>
A sequence of values of type TSource.
- selector
- Expression<Func<TSource,Single>>
A projection function to apply to each element.
- 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 average of the projected values.
Exceptions
source or selector is null.
source contains no elements.
If the CancellationToken is canceled.
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. See Avoiding DbContext threading issues for more information and examples.
See Querying data with EF Core for more information and examples.
Applies to
AverageAsync<TSource>(IQueryable<TSource>, Expression<Func<TSource,Nullable<Single>>>, CancellationToken)
Asynchronously computes the average of a sequence of values that is obtained by invoking a projection function on each element of the input sequence.
public static System.Threading.Tasks.Task<float?> AverageAsync<TSource> (this System.Linq.IQueryable<TSource> source, System.Linq.Expressions.Expression<Func<TSource,float?>> selector, System.Threading.CancellationToken cancellationToken = default);static member AverageAsync : System.Linq.IQueryable<'Source> * System.Linq.Expressions.Expression<Func<'Source, Nullable<single>>> * System.Threading.CancellationToken -> System.Threading.Tasks.Task<Nullable<single>><Extension()>
Public Function AverageAsync(Of TSource) (source As IQueryable(Of TSource), selector As Expression(Of Func(Of TSource, Nullable(Of Single))), Optional cancellationToken As CancellationToken = Nothing) As Task(Of Nullable(Of Single))Type Parameters
- TSource
The type of the elements of source.
Parameters
- source
- IQueryable<TSource>
A sequence of values of type TSource.
- selector
- Expression<Func<TSource,Nullable<Single>>>
A projection function to apply to each element.
- 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 average of the projected values.
Exceptions
source or selector is null.
If the CancellationToken is canceled.
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. See Avoiding DbContext threading issues for more information and examples.
See Querying data with EF Core for more information and examples.
Applies to
AverageAsync<TSource>(IQueryable<TSource>, Expression<Func<TSource,Nullable<Int64>>>, CancellationToken)
Asynchronously computes the average of a sequence of values that is obtained by invoking a projection function on each element of the input sequence.
public static System.Threading.Tasks.Task<double?> AverageAsync<TSource> (this System.Linq.IQueryable<TSource> source, System.Linq.Expressions.Expression<Func<TSource,long?>> selector, System.Threading.CancellationToken cancellationToken = default);static member AverageAsync : System.Linq.IQueryable<'Source> * System.Linq.Expressions.Expression<Func<'Source, Nullable<int64>>> * System.Threading.CancellationToken -> System.Threading.Tasks.Task<Nullable<double>><Extension()>
Public Function AverageAsync(Of TSource) (source As IQueryable(Of TSource), selector As Expression(Of Func(Of TSource, Nullable(Of Long))), Optional cancellationToken As CancellationToken = Nothing) As Task(Of Nullable(Of Double))Type Parameters
- TSource
The type of the elements of source.
Parameters
- source
- IQueryable<TSource>
A sequence of values of type TSource.
- selector
- Expression<Func<TSource,Nullable<Int64>>>
A projection function to apply to each element.
- 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 average of the projected values.
Exceptions
source or selector is null.
If the CancellationToken is canceled.
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. See Avoiding DbContext threading issues for more information and examples.
See Querying data with EF Core for more information and examples.
Applies to
AverageAsync<TSource>(IQueryable<TSource>, Expression<Func<TSource,Nullable<Double>>>, CancellationToken)
Asynchronously computes the average of a sequence of values that is obtained by invoking a projection function on each element of the input sequence.
public static System.Threading.Tasks.Task<double?> AverageAsync<TSource> (this System.Linq.IQueryable<TSource> source, System.Linq.Expressions.Expression<Func<TSource,double?>> selector, System.Threading.CancellationToken cancellationToken = default);static member AverageAsync : System.Linq.IQueryable<'Source> * System.Linq.Expressions.Expression<Func<'Source, Nullable<double>>> * System.Threading.CancellationToken -> System.Threading.Tasks.Task<Nullable<double>><Extension()>
Public Function AverageAsync(Of TSource) (source As IQueryable(Of TSource), selector As Expression(Of Func(Of TSource, Nullable(Of Double))), Optional cancellationToken As CancellationToken = Nothing) As Task(Of Nullable(Of Double))Type Parameters
- TSource
The type of the elements of source.
Parameters
- source
- IQueryable<TSource>
A sequence of values of type TSource.
- selector
- Expression<Func<TSource,Nullable<Double>>>
A projection function to apply to each element.
- 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 average of the projected values.
Exceptions
source or selector is null.
If the CancellationToken is canceled.
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. See Avoiding DbContext threading issues for more information and examples.
See Querying data with EF Core for more information and examples.
Applies to
AverageAsync<TSource>(IQueryable<TSource>, Expression<Func<TSource,Nullable<Decimal>>>, CancellationToken)
Asynchronously computes the average of a sequence of values that is obtained by invoking a projection function on each element of the input sequence.
public static System.Threading.Tasks.Task<decimal?> AverageAsync<TSource> (this System.Linq.IQueryable<TSource> source, System.Linq.Expressions.Expression<Func<TSource,decimal?>> selector, System.Threading.CancellationToken cancellationToken = default);static member AverageAsync : System.Linq.IQueryable<'Source> * System.Linq.Expressions.Expression<Func<'Source, Nullable<decimal>>> * System.Threading.CancellationToken -> System.Threading.Tasks.Task<Nullable<decimal>><Extension()>
Public Function AverageAsync(Of TSource) (source As IQueryable(Of TSource), selector As Expression(Of Func(Of TSource, Nullable(Of Decimal))), Optional cancellationToken As CancellationToken = Nothing) As Task(Of Nullable(Of Decimal))Type Parameters
- TSource
The type of the elements of source.
Parameters
- source
- IQueryable<TSource>
A sequence of values of type TSource.
- selector
- Expression<Func<TSource,Nullable<Decimal>>>
A projection function to apply to each element.
- 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 average of the projected values.
Exceptions
source or selector is null.
If the CancellationToken is canceled.
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. See Avoiding DbContext threading issues for more information and examples.
See Querying data with EF Core for more information and examples.
Applies to
AverageAsync<TSource>(IQueryable<TSource>, Expression<Func<TSource,Int64>>, CancellationToken)
Asynchronously computes the average of a sequence of values that is obtained by invoking a projection function on each element of the input sequence.
public static System.Threading.Tasks.Task<double> AverageAsync<TSource> (this System.Linq.IQueryable<TSource> source, System.Linq.Expressions.Expression<Func<TSource,long>> selector, System.Threading.CancellationToken cancellationToken = default);static member AverageAsync : System.Linq.IQueryable<'Source> * System.Linq.Expressions.Expression<Func<'Source, int64>> * System.Threading.CancellationToken -> System.Threading.Tasks.Task<double><Extension()>
Public Function AverageAsync(Of TSource) (source As IQueryable(Of TSource), selector As Expression(Of Func(Of TSource, Long)), Optional cancellationToken As CancellationToken = Nothing) As Task(Of Double)Type Parameters
- TSource
The type of the elements of source.
Parameters
- source
- IQueryable<TSource>
A sequence of values of type TSource.
- selector
- Expression<Func<TSource,Int64>>
A projection function to apply to each element.
- 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 average of the projected values.
Exceptions
source or selector is null.
source contains no elements.
If the CancellationToken is canceled.
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. See Avoiding DbContext threading issues for more information and examples.
See Querying data with EF Core for more information and examples.
Applies to
AverageAsync<TSource>(IQueryable<TSource>, Expression<Func<TSource,Int32>>, CancellationToken)
Asynchronously computes the average of a sequence of values that is obtained by invoking a projection function on each element of the input sequence.
public static System.Threading.Tasks.Task<double> AverageAsync<TSource> (this System.Linq.IQueryable<TSource> source, System.Linq.Expressions.Expression<Func<TSource,int>> selector, System.Threading.CancellationToken cancellationToken = default);static member AverageAsync : System.Linq.IQueryable<'Source> * System.Linq.Expressions.Expression<Func<'Source, int>> * System.Threading.CancellationToken -> System.Threading.Tasks.Task<double><Extension()>
Public Function AverageAsync(Of TSource) (source As IQueryable(Of TSource), selector As Expression(Of Func(Of TSource, Integer)), Optional cancellationToken As CancellationToken = Nothing) As Task(Of Double)Type Parameters
- TSource
The type of the elements of source.
Parameters
- source
- IQueryable<TSource>
A sequence of values of type TSource.
- selector
- Expression<Func<TSource,Int32>>
A projection function to apply to each element.
- 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 average of the projected values.
Exceptions
source or selector is null.
source contains no elements.
If the CancellationToken is canceled.
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. See Avoiding DbContext threading issues for more information and examples.
See Querying data with EF Core for more information and examples.
Applies to
AverageAsync<TSource>(IQueryable<TSource>, Expression<Func<TSource,Double>>, CancellationToken)
Asynchronously computes the average of a sequence of values that is obtained by invoking a projection function on each element of the input sequence.
public static System.Threading.Tasks.Task<double> AverageAsync<TSource> (this System.Linq.IQueryable<TSource> source, System.Linq.Expressions.Expression<Func<TSource,double>> selector, System.Threading.CancellationToken cancellationToken = default);static member AverageAsync : System.Linq.IQueryable<'Source> * System.Linq.Expressions.Expression<Func<'Source, double>> * System.Threading.CancellationToken -> System.Threading.Tasks.Task<double><Extension()>
Public Function AverageAsync(Of TSource) (source As IQueryable(Of TSource), selector As Expression(Of Func(Of TSource, Double)), Optional cancellationToken As CancellationToken = Nothing) As Task(Of Double)Type Parameters
- TSource
The type of the elements of source.
Parameters
- source
- IQueryable<TSource>
A sequence of values of type TSource.
- selector
- Expression<Func<TSource,Double>>
A projection function to apply to each element.
- 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 average of the projected values.
Exceptions
source or selector is null.
source contains no elements.
If the CancellationToken is canceled.
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. See Avoiding DbContext threading issues for more information and examples.
See Querying data with EF Core for more information and examples.
Applies to
AverageAsync<TSource>(IQueryable<TSource>, Expression<Func<TSource,Decimal>>, CancellationToken)
Asynchronously computes the average of a sequence of values that is obtained by invoking a projection function on each element of the input sequence.
public static System.Threading.Tasks.Task<decimal> AverageAsync<TSource> (this System.Linq.IQueryable<TSource> source, System.Linq.Expressions.Expression<Func<TSource,decimal>> selector, System.Threading.CancellationToken cancellationToken = default);static member AverageAsync : System.Linq.IQueryable<'Source> * System.Linq.Expressions.Expression<Func<'Source, decimal>> * System.Threading.CancellationToken -> System.Threading.Tasks.Task<decimal><Extension()>
Public Function AverageAsync(Of TSource) (source As IQueryable(Of TSource), selector As Expression(Of Func(Of TSource, Decimal)), Optional cancellationToken As CancellationToken = Nothing) As Task(Of Decimal)Type Parameters
- TSource
The type of the elements of source.
Parameters
- source
- IQueryable<TSource>
A sequence of values of type TSource.
- selector
- Expression<Func<TSource,Decimal>>
A projection function to apply to each element.
- 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 average of the projected values.
Exceptions
source or selector is null.
source contains no elements.
If the CancellationToken is canceled.
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. See Avoiding DbContext threading issues for more information and examples.
See Querying data with EF Core for more information and examples.
Applies to
Entity Framework