EntityFrameworkQueryableExtensions.AverageAsync Method

Definition

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,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,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<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,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

Task<Single>

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.

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.

See Querying data with EF Core for more information.

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

Task<Nullable<Single>>

A task that represents the asynchronous operation. The task result contains the average of the sequence of values.

Exceptions

source is null.

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.

See Querying data with EF Core for more information.

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

Task<Nullable<Double>>

A task that represents the asynchronous operation. The task result contains the average of the sequence of values.

Exceptions

source is null.

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.

See Querying data with EF Core for more information.

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

Task<Nullable<Double>>

A task that represents the asynchronous operation. The task result contains the average of the sequence of values.

Exceptions

source is null.

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.

See Querying data with EF Core for more information.

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

Task<Nullable<Double>>

A task that represents the asynchronous operation. The task result contains the average of the sequence of values.

Exceptions

source is null.

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.

See Querying data with EF Core for more information.

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

Task<Double>

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.

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.

See Querying data with EF Core for more information.

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

Task<Double>

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.

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.

See Querying data with EF Core for more information.

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

Task<Double>

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.

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.

See Querying data with EF Core for more information.

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

Task<Decimal>

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.

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.

See Querying data with EF Core for more information.

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

Task<Nullable<Decimal>>

A task that represents the asynchronous operation. The task result contains the average of the sequence of values.

Exceptions

source is null.

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.

See Querying data with EF Core for more information.

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

Task<Nullable<Double>>

A task that represents the asynchronous operation. The task result contains the average of the projected values.

Exceptions

source or selector is null.

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.

See Querying data with EF Core for more information.

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

Task<Single>

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.

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.

See Querying data with EF Core for more information.

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

Task<Nullable<Single>>

A task that represents the asynchronous operation. The task result contains the average of the projected values.

Exceptions

source or selector is null.

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.

See Querying data with EF Core for more information.

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

Task<Nullable<Double>>

A task that represents the asynchronous operation. The task result contains the average of the projected values.

Exceptions

source or selector is null.

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.

See Querying data with EF Core for more information.

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

Task<Nullable<Double>>

A task that represents the asynchronous operation. The task result contains the average of the projected values.

Exceptions

source or selector is null.

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.

See Querying data with EF Core for more information.

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

Task<Double>

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.

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.

See Querying data with EF Core for more information.

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

Task<Double>

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.

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.

See Querying data with EF Core for more information.

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

Task<Nullable<Decimal>>

A task that represents the asynchronous operation. The task result contains the average of the projected values.

Exceptions

source or selector is null.

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.

See Querying data with EF Core for more information.

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

Task<Double>

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.

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.

See Querying data with EF Core for more information.

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

Task<Decimal>

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.

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.

See Querying data with EF Core for more information.

Applies to