Enumerable.Average Méthode

public:
[System::Runtime::CompilerServices::Extension]
 static float Average(System::Collections::Generic::IEnumerable<float> ^ source);

public static float Average (this System.Collections.Generic.IEnumerable<float> source);

static member Average : seq<single> -> single

<Extension()>
Public Function Average (source As IEnumerable(Of Single)) As Single

Paramètres

Retours

Single

Moyenne de la séquence de valeurs.The average of the sequence of values.

Exceptions

Exemples

L’exemple de code suivant montre comment utiliser Average(IEnumerable<Int32>) pour calculer une moyenne.The following code example demonstrates how to use Average(IEnumerable<Int32>) to calculate an average.

List<int> grades = new List<int> { 78, 92, 100, 37, 81 };

double average = grades.Average();

Console.WriteLine("The average grade is {0}.", average);

// This code produces the following output:
//
// The average grade is 77.6.

' Create a list of integers.
Dim grades As New List(Of Integer)(New Integer() {78, 92, 100, 37, 81})

' Determine the average value in the list.
Dim avg As Double = grades.Average()

' Display the output.
Console.WriteLine($"The average grade is {avg}")

' This code produces the following output:
'
' The average grade is 77.6

Remarques

Dans Visual Basic syntaxe d’expression de requête, une Aggregate Into Average() clause se traduit par un appel de Average .In Visual Basic query expression syntax, an Aggregate Into Average() clause translates to an invocation of Average.

Voir aussi

• Aggregate, clause (Visual Basic)Aggregate Clause (Visual Basic)

public:
[System::Runtime::CompilerServices::Extension]
 static Nullable<float> Average(System::Collections::Generic::IEnumerable<Nullable<float>> ^ source);

public static float? Average (this System.Collections.Generic.IEnumerable<float?> source);

static member Average : seq<Nullable<single>> -> Nullable<single>

<Extension()>
Public Function Average (source As IEnumerable(Of Nullable(Of Single))) As Nullable(Of Single)

Paramètres

Retours

Nullable<Single>

La moyenne de la séquence de valeurs, ou null si la séquence source est vide ou contient uniquement des valeurs null.The average of the sequence of values, or null if the source sequence is empty or contains only values that are null.

Exceptions

Exemples

L’exemple de code suivant montre comment utiliser Average(IEnumerable<Nullable<Int64>>) pour calculer une moyenne.The following code example demonstrates how to use Average(IEnumerable<Nullable<Int64>>) to calculate an average.

long?[] longs = { null, 10007L, 37L, 399846234235L };

double? average = longs.Average();

Console.WriteLine("The average is {0}.", average);

// This code produces the following output:
//
// The average is 133282081426.333.

' Create an array of nullable long values.
Dim longs() As Nullable(Of Long) = {Nothing, 10007L, 37L, 399846234235L}

' Determine the average value in the array.
Dim avg As Nullable(Of Double) = longs.Average()

' Display the output.
Console.WriteLine($"The average is {avg}")

' This code produces the following output:
'
' The average is 133282081426.333

Remarques

Dans Visual Basic syntaxe d’expression de requête, une Aggregate Into Average() clause se traduit par un appel de Average .In Visual Basic query expression syntax, an Aggregate Into Average() clause translates to an invocation of Average.

Voir aussi

• Aggregate, clause (Visual Basic)Aggregate Clause (Visual Basic)

public:
[System::Runtime::CompilerServices::Extension]
 static Nullable<double> Average(System::Collections::Generic::IEnumerable<Nullable<long>> ^ source);

public static double? Average (this System.Collections.Generic.IEnumerable<long?> source);

static member Average : seq<Nullable<int64>> -> Nullable<double>

<Extension()>
Public Function Average (source As IEnumerable(Of Nullable(Of Long))) As Nullable(Of Double)

Paramètres

Retours

Nullable<Double>

La moyenne de la séquence de valeurs, ou null si la séquence source est vide ou contient uniquement des valeurs null.The average of the sequence of values, or null if the source sequence is empty or contains only values that are null.

Exceptions

Exemples

L’exemple de code suivant montre comment utiliser Average(IEnumerable<Nullable<Int64>>) pour calculer une moyenne.The following code example demonstrates how to use Average(IEnumerable<Nullable<Int64>>) to calculate an average.

long?[] longs = { null, 10007L, 37L, 399846234235L };

double? average = longs.Average();

Console.WriteLine("The average is {0}.", average);

// This code produces the following output:
//
// The average is 133282081426.333.

' Create an array of nullable long values.
Dim longs() As Nullable(Of Long) = {Nothing, 10007L, 37L, 399846234235L}

' Determine the average value in the array.
Dim avg As Nullable(Of Double) = longs.Average()

' Display the output.
Console.WriteLine($"The average is {avg}")

' This code produces the following output:
'
' The average is 133282081426.333

Remarques

Dans Visual Basic syntaxe d’expression de requête, une Aggregate Into Average() clause se traduit par un appel de Average .In Visual Basic query expression syntax, an Aggregate Into Average() clause translates to an invocation of Average.

Voir aussi

• Aggregate, clause (Visual Basic)Aggregate Clause (Visual Basic)

public:
[System::Runtime::CompilerServices::Extension]
 static Nullable<double> Average(System::Collections::Generic::IEnumerable<Nullable<int>> ^ source);

public static double? Average (this System.Collections.Generic.IEnumerable<int?> source);

static member Average : seq<Nullable<int>> -> Nullable<double>

<Extension()>
Public Function Average (source As IEnumerable(Of Nullable(Of Integer))) As Nullable(Of Double)

Paramètres

Retours

Nullable<Double>

La moyenne de la séquence de valeurs, ou null si la séquence source est vide ou contient uniquement des valeurs null.The average of the sequence of values, or null if the source sequence is empty or contains only values that are null.

Exceptions

Exemples

L’exemple de code suivant montre comment utiliser Average(IEnumerable<Nullable<Int64>>) pour calculer une moyenne.The following code example demonstrates how to use Average(IEnumerable<Nullable<Int64>>) to calculate an average.

long?[] longs = { null, 10007L, 37L, 399846234235L };

double? average = longs.Average();

Console.WriteLine("The average is {0}.", average);

// This code produces the following output:
//
// The average is 133282081426.333.

' Create an array of nullable long values.
Dim longs() As Nullable(Of Long) = {Nothing, 10007L, 37L, 399846234235L}

' Determine the average value in the array.
Dim avg As Nullable(Of Double) = longs.Average()

' Display the output.
Console.WriteLine($"The average is {avg}")

' This code produces the following output:
'
' The average is 133282081426.333

Remarques

Dans Visual Basic syntaxe d’expression de requête, une Aggregate Into Average() clause se traduit par un appel de Average .In Visual Basic query expression syntax, an Aggregate Into Average() clause translates to an invocation of Average.

Voir aussi

• Aggregate, clause (Visual Basic)Aggregate Clause (Visual Basic)

public:
[System::Runtime::CompilerServices::Extension]
 static Nullable<double> Average(System::Collections::Generic::IEnumerable<Nullable<double>> ^ source);

public static double? Average (this System.Collections.Generic.IEnumerable<double?> source);

static member Average : seq<Nullable<double>> -> Nullable<double>

<Extension()>
Public Function Average (source As IEnumerable(Of Nullable(Of Double))) As Nullable(Of Double)

Paramètres

Retours

Nullable<Double>

La moyenne de la séquence de valeurs, ou null si la séquence source est vide ou contient uniquement des valeurs null.The average of the sequence of values, or null if the source sequence is empty or contains only values that are null.

Exceptions

Exemples

L’exemple de code suivant montre comment utiliser Average(IEnumerable<Nullable<Int64>>) pour calculer une moyenne.The following code example demonstrates how to use Average(IEnumerable<Nullable<Int64>>) to calculate an average.

long?[] longs = { null, 10007L, 37L, 399846234235L };

double? average = longs.Average();

Console.WriteLine("The average is {0}.", average);

// This code produces the following output:
//
// The average is 133282081426.333.

' Create an array of nullable long values.
Dim longs() As Nullable(Of Long) = {Nothing, 10007L, 37L, 399846234235L}

' Determine the average value in the array.
Dim avg As Nullable(Of Double) = longs.Average()

' Display the output.
Console.WriteLine($"The average is {avg}")

' This code produces the following output:
'
' The average is 133282081426.333

Remarques

Si la somme des éléments est trop grande pour être représentée en tant que Double , cette méthode retourne l’infini positif ou négatif.If the sum of the elements is too large to represent as a Double, this method returns positive or negative infinity.

Dans Visual Basic syntaxe d’expression de requête, une Aggregate Into Average() clause se traduit par un appel de Average .In Visual Basic query expression syntax, an Aggregate Into Average() clause translates to an invocation of Average.

Voir aussi

• Aggregate, clause (Visual Basic)Aggregate Clause (Visual Basic)

public:
[System::Runtime::CompilerServices::Extension]
 static double Average(System::Collections::Generic::IEnumerable<long> ^ source);

public static double Average (this System.Collections.Generic.IEnumerable<long> source);

static member Average : seq<int64> -> double

<Extension()>
Public Function Average (source As IEnumerable(Of Long)) As Double

Paramètres

Retours

Double

Moyenne de la séquence de valeurs.The average of the sequence of values.

Exceptions

Exemples

L’exemple de code suivant montre comment utiliser Average(IEnumerable<Int32>) pour calculer une moyenne.The following code example demonstrates how to use Average(IEnumerable<Int32>) to calculate an average.

List<int> grades = new List<int> { 78, 92, 100, 37, 81 };

double average = grades.Average();

Console.WriteLine("The average grade is {0}.", average);

// This code produces the following output:
//
// The average grade is 77.6.

' Create a list of integers.
Dim grades As New List(Of Integer)(New Integer() {78, 92, 100, 37, 81})

' Determine the average value in the list.
Dim avg As Double = grades.Average()

' Display the output.
Console.WriteLine($"The average grade is {avg}")

' This code produces the following output:
'
' The average grade is 77.6

Remarques

Dans Visual Basic syntaxe d’expression de requête, une Aggregate Into Average() clause se traduit par un appel de Average .In Visual Basic query expression syntax, an Aggregate Into Average() clause translates to an invocation of Average.

Voir aussi

• Aggregate, clause (Visual Basic)Aggregate Clause (Visual Basic)

public:
[System::Runtime::CompilerServices::Extension]
 static double Average(System::Collections::Generic::IEnumerable<int> ^ source);

public static double Average (this System.Collections.Generic.IEnumerable<int> source);

static member Average : seq<int> -> double

<Extension()>
Public Function Average (source As IEnumerable(Of Integer)) As Double

Paramètres

Retours

Double

Moyenne de la séquence de valeurs.The average of the sequence of values.

Exceptions

Exemples

L’exemple de code suivant montre comment utiliser Average(IEnumerable<Int32>) pour calculer une moyenne.The following code example demonstrates how to use Average(IEnumerable<Int32>) to calculate an average.

List<int> grades = new List<int> { 78, 92, 100, 37, 81 };

double average = grades.Average();

Console.WriteLine("The average grade is {0}.", average);

// This code produces the following output:
//
// The average grade is 77.6.

' Create a list of integers.
Dim grades As New List(Of Integer)(New Integer() {78, 92, 100, 37, 81})

' Determine the average value in the list.
Dim avg As Double = grades.Average()

' Display the output.
Console.WriteLine($"The average grade is {avg}")

' This code produces the following output:
'
' The average grade is 77.6

Remarques

Dans Visual Basic syntaxe d’expression de requête, une Aggregate Into Average() clause se traduit par un appel de Average .In Visual Basic query expression syntax, an Aggregate Into Average() clause translates to an invocation of Average.

Voir aussi

• Aggregate, clause (Visual Basic)Aggregate Clause (Visual Basic)

public:
[System::Runtime::CompilerServices::Extension]
 static double Average(System::Collections::Generic::IEnumerable<double> ^ source);

public static double Average (this System.Collections.Generic.IEnumerable<double> source);

static member Average : seq<double> -> double

<Extension()>
Public Function Average (source As IEnumerable(Of Double)) As Double

Paramètres

Retours

Double

Moyenne de la séquence de valeurs.The average of the sequence of values.

Exceptions

Exemples

L’exemple de code suivant montre comment utiliser Average(IEnumerable<Int32>) pour calculer une moyenne.The following code example demonstrates how to use Average(IEnumerable<Int32>) to calculate an average.

List<int> grades = new List<int> { 78, 92, 100, 37, 81 };

double average = grades.Average();

Console.WriteLine("The average grade is {0}.", average);

// This code produces the following output:
//
// The average grade is 77.6.

' Create a list of integers.
Dim grades As New List(Of Integer)(New Integer() {78, 92, 100, 37, 81})

' Determine the average value in the list.
Dim avg As Double = grades.Average()

' Display the output.
Console.WriteLine($"The average grade is {avg}")

' This code produces the following output:
'
' The average grade is 77.6

Remarques

Si la somme des éléments est trop grande pour être représentée en tant que Double , cette méthode retourne l’infini positif ou négatif.If the sum of the elements is too large to represent as a Double, this method returns positive or negative infinity.

Dans Visual Basic syntaxe d’expression de requête, une Aggregate Into Average() clause se traduit par un appel de Average .In Visual Basic query expression syntax, an Aggregate Into Average() clause translates to an invocation of Average.

Voir aussi

• Aggregate, clause (Visual Basic)Aggregate Clause (Visual Basic)

public:
[System::Runtime::CompilerServices::Extension]
 static System::Decimal Average(System::Collections::Generic::IEnumerable<System::Decimal> ^ source);

public static decimal Average (this System.Collections.Generic.IEnumerable<decimal> source);

static member Average : seq<decimal> -> decimal

<Extension()>
Public Function Average (source As IEnumerable(Of Decimal)) As Decimal

Paramètres

Retours

Decimal

Moyenne de la séquence de valeurs.The average of the sequence of values.

Exceptions

Exemples

L’exemple de code suivant montre comment utiliser Average(IEnumerable<Int32>) pour calculer la moyenne d’une séquence de valeurs.The following code example demonstrates how to use Average(IEnumerable<Int32>) to calculate the average of a sequence of values.

List<int> grades = new List<int> { 78, 92, 100, 37, 81 };

double average = grades.Average();

Console.WriteLine("The average grade is {0}.", average);

// This code produces the following output:
//
// The average grade is 77.6.

' Create a list of integers.
Dim grades As New List(Of Integer)(New Integer() {78, 92, 100, 37, 81})

' Determine the average value in the list.
Dim avg As Double = grades.Average()

' Display the output.
Console.WriteLine($"The average grade is {avg}")

' This code produces the following output:
'
' The average grade is 77.6

Remarques

Dans Visual Basic syntaxe d’expression de requête, une Aggregate Into Average() clause se traduit par un appel de Average .In Visual Basic query expression syntax, an Aggregate Into Average() clause translates to an invocation of Average.

Voir aussi

• Aggregate, clause (Visual Basic)Aggregate Clause (Visual Basic)

public:
[System::Runtime::CompilerServices::Extension]
 static Nullable<System::Decimal> Average(System::Collections::Generic::IEnumerable<Nullable<System::Decimal>> ^ source);

public static decimal? Average (this System.Collections.Generic.IEnumerable<decimal?> source);

static member Average : seq<Nullable<decimal>> -> Nullable<decimal>

<Extension()>
Public Function Average (source As IEnumerable(Of Nullable(Of Decimal))) As Nullable(Of Decimal)

Paramètres

Retours

Nullable<Decimal>

La moyenne de la séquence de valeurs, ou null si la séquence source est vide ou contient uniquement des valeurs null.The average of the sequence of values, or null if the source sequence is empty or contains only values that are null.

Exceptions

Exemples

L’exemple de code suivant montre comment utiliser Average(IEnumerable<Nullable<Int64>>) pour calculer une moyenne.The following code example demonstrates how to use Average(IEnumerable<Nullable<Int64>>) to calculate an average.

long?[] longs = { null, 10007L, 37L, 399846234235L };

double? average = longs.Average();

Console.WriteLine("The average is {0}.", average);

// This code produces the following output:
//
// The average is 133282081426.333.

' Create an array of nullable long values.
Dim longs() As Nullable(Of Long) = {Nothing, 10007L, 37L, 399846234235L}

' Determine the average value in the array.
Dim avg As Nullable(Of Double) = longs.Average()

' Display the output.
Console.WriteLine($"The average is {avg}")

' This code produces the following output:
'
' The average is 133282081426.333

Remarques

Dans Visual Basic syntaxe d’expression de requête, une Aggregate Into Average() clause se traduit par un appel de Average .In Visual Basic query expression syntax, an Aggregate Into Average() clause translates to an invocation of Average.

Voir aussi

• Aggregate, clause (Visual Basic)Aggregate Clause (Visual Basic)

public:
generic <typename TSource>
[System::Runtime::CompilerServices::Extension]
 static Nullable<double> Average(System::Collections::Generic::IEnumerable<TSource> ^ source, Func<TSource, Nullable<int>> ^ selector);

public static double? Average<TSource> (this System.Collections.Generic.IEnumerable<TSource> source, Func<TSource,int?> selector);

static member Average : seq<'Source> * Func<'Source, Nullable<int>> -> Nullable<double>

<Extension()>
Public Function Average(Of TSource) (source As IEnumerable(Of TSource), selector As Func(Of TSource, Nullable(Of Integer))) As Nullable(Of Double)

Paramètres de type

Paramètres

Retours

Nullable<Double>

La moyenne de la séquence de valeurs, ou null si la séquence source est vide ou contient uniquement des valeurs null.The average of the sequence of values, or null if the source sequence is empty or contains only values that are null.

Exceptions

Exemples

L’exemple de code suivant montre comment utiliser Average<TSource>(IEnumerable<TSource>, Func<TSource,Int32>) pour calculer une moyenne.The following code example demonstrates how to use Average<TSource>(IEnumerable<TSource>, Func<TSource,Int32>) to calculate an average.

string[] fruits = { "apple", "banana", "mango", "orange", "passionfruit", "grape" };

double average = fruits.Average(s => s.Length);

Console.WriteLine("The average string length is {0}.", average);

// This code produces the following output:
//
// The average string length is 6.5.

' Create an array of strings.
Dim fruits() As String =
{"apple", "banana", "mango", "orange", "passionfruit", "grape"}

' Determine the average length of the strings in the array.
Dim avg As Double = fruits.Average(Function(s) s.Length)

' Display the output.
Console.WriteLine($"The average string length is {avg}")

' This code produces the following output:
'
' The average string length is 6.5

Remarques

Dans Visual Basic syntaxe d’expression de requête, une Aggregate Into Average() clause se traduit par un appel de Average .In Visual Basic query expression syntax, an Aggregate Into Average() clause translates to an invocation of Average.

Voir aussi

• Aggregate, clause (Visual Basic)Aggregate Clause (Visual Basic)

public:
generic <typename TSource>
[System::Runtime::CompilerServices::Extension]
 static float Average(System::Collections::Generic::IEnumerable<TSource> ^ source, Func<TSource, float> ^ selector);

public static float Average<TSource> (this System.Collections.Generic.IEnumerable<TSource> source, Func<TSource,float> selector);

static member Average : seq<'Source> * Func<'Source, single> -> single

<Extension()>
Public Function Average(Of TSource) (source As IEnumerable(Of TSource), selector As Func(Of TSource, Single)) As Single

Paramètres de type

Paramètres

Retours

Single

Moyenne de la séquence de valeurs.The average of the sequence of values.

Exceptions

Exemples

L’exemple de code suivant montre comment utiliser Average<TSource>(IEnumerable<TSource>, Func<TSource,Int32>) pour calculer une moyenne.The following code example demonstrates how to use Average<TSource>(IEnumerable<TSource>, Func<TSource,Int32>) to calculate an average.

string[] fruits = { "apple", "banana", "mango", "orange", "passionfruit", "grape" };

double average = fruits.Average(s => s.Length);

Console.WriteLine("The average string length is {0}.", average);

// This code produces the following output:
//
// The average string length is 6.5.

' Create an array of strings.
Dim fruits() As String =
{"apple", "banana", "mango", "orange", "passionfruit", "grape"}

' Determine the average length of the strings in the array.
Dim avg As Double = fruits.Average(Function(s) s.Length)

' Display the output.
Console.WriteLine($"The average string length is {avg}")

' This code produces the following output:
'
' The average string length is 6.5

Remarques

Dans Visual Basic syntaxe d’expression de requête, une Aggregate Into Average() clause se traduit par un appel de Average .In Visual Basic query expression syntax, an Aggregate Into Average() clause translates to an invocation of Average.

Voir aussi

• Aggregate, clause (Visual Basic)Aggregate Clause (Visual Basic)

public:
generic <typename TSource>
[System::Runtime::CompilerServices::Extension]
 static Nullable<float> Average(System::Collections::Generic::IEnumerable<TSource> ^ source, Func<TSource, Nullable<float>> ^ selector);

public static float? Average<TSource> (this System.Collections.Generic.IEnumerable<TSource> source, Func<TSource,float?> selector);

static member Average : seq<'Source> * Func<'Source, Nullable<single>> -> Nullable<single>

<Extension()>
Public Function Average(Of TSource) (source As IEnumerable(Of TSource), selector As Func(Of TSource, Nullable(Of Single))) As Nullable(Of Single)

Paramètres de type

Paramètres

Retours

Nullable<Single>

La moyenne de la séquence de valeurs, ou null si la séquence source est vide ou contient uniquement des valeurs null.The average of the sequence of values, or null if the source sequence is empty or contains only values that are null.

Exceptions

Exemples

L’exemple de code suivant montre comment utiliser Average<TSource>(IEnumerable<TSource>, Func<TSource,Int32>) pour calculer une moyenne.The following code example demonstrates how to use Average<TSource>(IEnumerable<TSource>, Func<TSource,Int32>) to calculate an average.

string[] fruits = { "apple", "banana", "mango", "orange", "passionfruit", "grape" };

double average = fruits.Average(s => s.Length);

Console.WriteLine("The average string length is {0}.", average);

// This code produces the following output:
//
// The average string length is 6.5.

' Create an array of strings.
Dim fruits() As String =
{"apple", "banana", "mango", "orange", "passionfruit", "grape"}

' Determine the average length of the strings in the array.
Dim avg As Double = fruits.Average(Function(s) s.Length)

' Display the output.
Console.WriteLine($"The average string length is {avg}")

' This code produces the following output:
'
' The average string length is 6.5

Remarques

Dans Visual Basic syntaxe d’expression de requête, une Aggregate Into Average() clause se traduit par un appel de Average .In Visual Basic query expression syntax, an Aggregate Into Average() clause translates to an invocation of Average.

Voir aussi

• Aggregate, clause (Visual Basic)Aggregate Clause (Visual Basic)

public:
generic <typename TSource>
[System::Runtime::CompilerServices::Extension]
 static Nullable<double> Average(System::Collections::Generic::IEnumerable<TSource> ^ source, Func<TSource, Nullable<long>> ^ selector);

public static double? Average<TSource> (this System.Collections.Generic.IEnumerable<TSource> source, Func<TSource,long?> selector);

static member Average : seq<'Source> * Func<'Source, Nullable<int64>> -> Nullable<double>

<Extension()>
Public Function Average(Of TSource) (source As IEnumerable(Of TSource), selector As Func(Of TSource, Nullable(Of Long))) As Nullable(Of Double)

Paramètres de type

Paramètres

Retours

Nullable<Double>

La moyenne de la séquence de valeurs, ou null si la séquence source est vide ou contient uniquement des valeurs null.The average of the sequence of values, or null if the source sequence is empty or contains only values that are null.

Exemples

L’exemple de code suivant montre comment utiliser Average<TSource>(IEnumerable<TSource>, Func<TSource,Int64>) pour calculer une moyenne.The following code example demonstrates how to use Average<TSource>(IEnumerable<TSource>, Func<TSource,Int64>) to calculate an average.

string[] numbers = { "10007", "37", "299846234235" };

double average = numbers.Average(num => Convert.ToInt64(num));

Console.WriteLine("The average is {0}.", average);

// This code produces the following output:
//
// The average is 99948748093.

' Create an array of strings.
Dim numbers() As String = {"10007", "37", "299846234235"}

' Determine the average number after converting each
' string to an Int64 value.
Dim avg As Double =
numbers.Average(Function(number) Convert.ToInt64(number))

' Display the output.
Console.WriteLine($"The average is {avg}")

' This code produces the following output:
'
' The average is 99948748093

Remarques

Dans Visual Basic syntaxe d’expression de requête, une Aggregate Into Average() clause se traduit par un appel de Average .In Visual Basic query expression syntax, an Aggregate Into Average() clause translates to an invocation of Average.

Voir aussi

• Aggregate, clause (Visual Basic)Aggregate Clause (Visual Basic)

public:
generic <typename TSource>
[System::Runtime::CompilerServices::Extension]
 static Nullable<double> Average(System::Collections::Generic::IEnumerable<TSource> ^ source, Func<TSource, Nullable<double>> ^ selector);

public static double? Average<TSource> (this System.Collections.Generic.IEnumerable<TSource> source, Func<TSource,double?> selector);

static member Average : seq<'Source> * Func<'Source, Nullable<double>> -> Nullable<double>

<Extension()>
Public Function Average(Of TSource) (source As IEnumerable(Of TSource), selector As Func(Of TSource, Nullable(Of Double))) As Nullable(Of Double)

Paramètres de type

Paramètres

Retours

Nullable<Double>

La moyenne de la séquence de valeurs, ou null si la séquence source est vide ou contient uniquement des valeurs null.The average of the sequence of values, or null if the source sequence is empty or contains only values that are null.

Exceptions

Exemples

L’exemple de code suivant montre comment utiliser Average<TSource>(IEnumerable<TSource>, Func<TSource,Int64>) pour calculer une moyenne.The following code example demonstrates how to use Average<TSource>(IEnumerable<TSource>, Func<TSource,Int64>) to calculate an average.

string[] numbers = { "10007", "37", "299846234235" };

double average = numbers.Average(num => Convert.ToInt64(num));

Console.WriteLine("The average is {0}.", average);

// This code produces the following output:
//
// The average is 99948748093.

' Create an array of strings.
Dim numbers() As String = {"10007", "37", "299846234235"}

' Determine the average number after converting each
' string to an Int64 value.
Dim avg As Double =
numbers.Average(Function(number) Convert.ToInt64(number))

' Display the output.
Console.WriteLine($"The average is {avg}")

' This code produces the following output:
'
' The average is 99948748093

Remarques

Dans Visual Basic syntaxe d’expression de requête, une Aggregate Into Average() clause se traduit par un appel de Average .In Visual Basic query expression syntax, an Aggregate Into Average() clause translates to an invocation of Average.

Voir aussi

• Aggregate, clause (Visual Basic)Aggregate Clause (Visual Basic)

public:
generic <typename TSource>
[System::Runtime::CompilerServices::Extension]
 static Nullable<System::Decimal> Average(System::Collections::Generic::IEnumerable<TSource> ^ source, Func<TSource, Nullable<System::Decimal>> ^ selector);

public static decimal? Average<TSource> (this System.Collections.Generic.IEnumerable<TSource> source, Func<TSource,decimal?> selector);

static member Average : seq<'Source> * Func<'Source, Nullable<decimal>> -> Nullable<decimal>

<Extension()>
Public Function Average(Of TSource) (source As IEnumerable(Of TSource), selector As Func(Of TSource, Nullable(Of Decimal))) As Nullable(Of Decimal)

Paramètres de type

Paramètres

Retours

Nullable<Decimal>

La moyenne de la séquence de valeurs, ou null si la séquence source est vide ou contient uniquement des valeurs null.The average of the sequence of values, or null if the source sequence is empty or contains only values that are null.

Exceptions

Exemples

L’exemple de code suivant montre comment utiliser Average<TSource>(IEnumerable<TSource>, Func<TSource,Int64>) pour calculer une moyenne.The following code example demonstrates how to use Average<TSource>(IEnumerable<TSource>, Func<TSource,Int64>) to calculate an average.

string[] numbers = { "10007", "37", "299846234235" };

double average = numbers.Average(num => Convert.ToInt64(num));

Console.WriteLine("The average is {0}.", average);

// This code produces the following output:
//
// The average is 99948748093.

' Create an array of strings.
Dim numbers() As String = {"10007", "37", "299846234235"}

' Determine the average number after converting each
' string to an Int64 value.
Dim avg As Double =
numbers.Average(Function(number) Convert.ToInt64(number))

' Display the output.
Console.WriteLine($"The average is {avg}")

' This code produces the following output:
'
' The average is 99948748093

Remarques

Dans Visual Basic syntaxe d’expression de requête, une Aggregate Into Average() clause se traduit par un appel de Average .In Visual Basic query expression syntax, an Aggregate Into Average() clause translates to an invocation of Average.

Voir aussi

• Aggregate, clause (Visual Basic)Aggregate Clause (Visual Basic)

public:
generic <typename TSource>
[System::Runtime::CompilerServices::Extension]
 static double Average(System::Collections::Generic::IEnumerable<TSource> ^ source, Func<TSource, long> ^ selector);

public static double Average<TSource> (this System.Collections.Generic.IEnumerable<TSource> source, Func<TSource,long> selector);

static member Average : seq<'Source> * Func<'Source, int64> -> double

<Extension()>
Public Function Average(Of TSource) (source As IEnumerable(Of TSource), selector As Func(Of TSource, Long)) As Double

Paramètres de type

Paramètres

Retours

Double

Moyenne de la séquence de valeurs.The average of the sequence of values.

Exceptions

Exemples

L’exemple de code suivant montre comment utiliser Average<TSource>(IEnumerable<TSource>, Func<TSource,Int64>) pour calculer une moyenne.The following code example demonstrates how to use Average<TSource>(IEnumerable<TSource>, Func<TSource,Int64>) to calculate an average.

string[] numbers = { "10007", "37", "299846234235" };

double average = numbers.Average(num => Convert.ToInt64(num));

Console.WriteLine("The average is {0}.", average);

// This code produces the following output:
//
// The average is 99948748093.

' Create an array of strings.
Dim numbers() As String = {"10007", "37", "299846234235"}

' Determine the average number after converting each
' string to an Int64 value.
Dim avg As Double =
numbers.Average(Function(number) Convert.ToInt64(number))

' Display the output.
Console.WriteLine($"The average is {avg}")

' This code produces the following output:
'
' The average is 99948748093

Remarques

Dans Visual Basic syntaxe d’expression de requête, une Aggregate Into Average() clause se traduit par un appel de Average .In Visual Basic query expression syntax, an Aggregate Into Average() clause translates to an invocation of Average.

Voir aussi

• Aggregate, clause (Visual Basic)Aggregate Clause (Visual Basic)

public:
generic <typename TSource>
[System::Runtime::CompilerServices::Extension]
 static double Average(System::Collections::Generic::IEnumerable<TSource> ^ source, Func<TSource, int> ^ selector);

public static double Average<TSource> (this System.Collections.Generic.IEnumerable<TSource> source, Func<TSource,int> selector);

static member Average : seq<'Source> * Func<'Source, int> -> double

<Extension()>
Public Function Average(Of TSource) (source As IEnumerable(Of TSource), selector As Func(Of TSource, Integer)) As Double

Paramètres de type

Paramètres

Retours

Double

Moyenne de la séquence de valeurs.The average of the sequence of values.

Exceptions

Exemples

L’exemple de code suivant montre comment utiliser Average<TSource>(IEnumerable<TSource>, Func<TSource,Int32>) pour calculer une moyenne.The following code example demonstrates how to use Average<TSource>(IEnumerable<TSource>, Func<TSource,Int32>) to calculate an average.

string[] fruits = { "apple", "banana", "mango", "orange", "passionfruit", "grape" };

double average = fruits.Average(s => s.Length);

Console.WriteLine("The average string length is {0}.", average);

// This code produces the following output:
//
// The average string length is 6.5.

' Create an array of strings.
Dim fruits() As String =
{"apple", "banana", "mango", "orange", "passionfruit", "grape"}

' Determine the average length of the strings in the array.
Dim avg As Double = fruits.Average(Function(s) s.Length)

' Display the output.
Console.WriteLine($"The average string length is {avg}")

' This code produces the following output:
'
' The average string length is 6.5

Remarques

Dans Visual Basic syntaxe d’expression de requête, une Aggregate Into Average() clause se traduit par un appel de Average .In Visual Basic query expression syntax, an Aggregate Into Average() clause translates to an invocation of Average.

Voir aussi

• Aggregate, clause (Visual Basic)Aggregate Clause (Visual Basic)

public:
generic <typename TSource>
[System::Runtime::CompilerServices::Extension]
 static double Average(System::Collections::Generic::IEnumerable<TSource> ^ source, Func<TSource, double> ^ selector);

public static double Average<TSource> (this System.Collections.Generic.IEnumerable<TSource> source, Func<TSource,double> selector);

static member Average : seq<'Source> * Func<'Source, double> -> double

<Extension()>
Public Function Average(Of TSource) (source As IEnumerable(Of TSource), selector As Func(Of TSource, Double)) As Double

Paramètres de type

Paramètres

Retours

Double

Moyenne de la séquence de valeurs.The average of the sequence of values.

Exceptions

Exemples

L’exemple de code suivant montre comment utiliser Average<TSource>(IEnumerable<TSource>, Func<TSource,Int64>) pour calculer une moyenne.The following code example demonstrates how to use Average<TSource>(IEnumerable<TSource>, Func<TSource,Int64>) to calculate an average.

string[] numbers = { "10007", "37", "299846234235" };

double average = numbers.Average(num => Convert.ToInt64(num));

Console.WriteLine("The average is {0}.", average);

// This code produces the following output:
//
// The average is 99948748093.

' Create an array of strings.
Dim numbers() As String = {"10007", "37", "299846234235"}

' Determine the average number after converting each
' string to an Int64 value.
Dim avg As Double =
numbers.Average(Function(number) Convert.ToInt64(number))

' Display the output.
Console.WriteLine($"The average is {avg}")

' This code produces the following output:
'
' The average is 99948748093

Remarques

Dans Visual Basic syntaxe d’expression de requête, une Aggregate Into Average() clause se traduit par un appel de Average .In Visual Basic query expression syntax, an Aggregate Into Average() clause translates to an invocation of Average.

Voir aussi

• Aggregate, clause (Visual Basic)Aggregate Clause (Visual Basic)

public:
generic <typename TSource>
[System::Runtime::CompilerServices::Extension]
 static System::Decimal Average(System::Collections::Generic::IEnumerable<TSource> ^ source, Func<TSource, System::Decimal> ^ selector);

public static decimal Average<TSource> (this System.Collections.Generic.IEnumerable<TSource> source, Func<TSource,decimal> selector);

static member Average : seq<'Source> * Func<'Source, decimal> -> decimal

<Extension()>
Public Function Average(Of TSource) (source As IEnumerable(Of TSource), selector As Func(Of TSource, Decimal)) As Decimal

Paramètres de type

Paramètres

Retours

Decimal

Moyenne de la séquence de valeurs.The average of the sequence of values.

Exceptions

Exemples

L’exemple de code suivant montre comment utiliser Average<TSource>(IEnumerable<TSource>, Func<TSource,Int64>) pour calculer une moyenne.The following code example demonstrates how to use Average<TSource>(IEnumerable<TSource>, Func<TSource,Int64>) to calculate an average.

string[] numbers = { "10007", "37", "299846234235" };

double average = numbers.Average(num => Convert.ToInt64(num));

Console.WriteLine("The average is {0}.", average);

// This code produces the following output:
//
// The average is 99948748093.

' Create an array of strings.
Dim numbers() As String = {"10007", "37", "299846234235"}

' Determine the average number after converting each
' string to an Int64 value.
Dim avg As Double =
numbers.Average(Function(number) Convert.ToInt64(number))

' Display the output.
Console.WriteLine($"The average is {avg}")

' This code produces the following output:
'
' The average is 99948748093

Remarques

Dans Visual Basic syntaxe d’expression de requête, une Aggregate Into Average() clause se traduit par un appel de Average .In Visual Basic query expression syntax, an Aggregate Into Average() clause translates to an invocation of Average.

Voir aussi

• Aggregate, clause (Visual Basic)Aggregate Clause (Visual Basic)