Queryable.MaxBy Method

Definition

Namespace:

System.Linq

Assembly:

System.Linq.Queryable.dll

Overloads

MaxBy<TSource,TKey>(IQueryable<TSource>, Expression<Func<TSource,TKey>>)	Returns the maximum value in a generic IQueryable<T> according to a specified key selector function.
MaxBy<TSource,TKey>(IQueryable<TSource>, Expression<Func<TSource,TKey>>, IComparer<TSource>)	Returns the maximum value in a generic IQueryable<T> according to a specified key selector function.

MaxBy<TSource,TKey>(IQueryable<TSource>, Expression<Func<TSource,TKey>>)

Source:

Queryable.cs

Returns the maximum value in a generic IQueryable<T> according to a specified key selector function.

public:
generic <typename TSource, typename TKey>
[System::Runtime::CompilerServices::Extension]
 static TSource MaxBy(System::Linq::IQueryable<TSource> ^ source, System::Linq::Expressions::Expression<Func<TSource, TKey> ^> ^ keySelector);

public static TSource? MaxBy<TSource,TKey> (this System.Linq.IQueryable<TSource> source, System.Linq.Expressions.Expression<Func<TSource,TKey>> keySelector);

static member MaxBy : System.Linq.IQueryable<'Source> * System.Linq.Expressions.Expression<Func<'Source, 'Key>> -> 'Source

<Extension()>
Public Function MaxBy(Of TSource, TKey) (source As IQueryable(Of TSource), keySelector As Expression(Of Func(Of TSource, TKey))) As TSource

Type Parameters

TSource

The type of the elements of source.

TKey

The type of key to compare elements by.

Parameters

source

IQueryable<TSource>

A sequence of values to determine the maximum value of.

keySelector

Expression<Func<TSource,TKey>>

A function to extract the key for each element.

Returns

TSource

The value with the maximum key in the sequence.

Exceptions

ArgumentNullException

source is null.

ArgumentException

No key extracted from source implements the IComparable or IComparable<T> interface.

MaxBy<TSource,TKey>(IQueryable<TSource>, Expression<Func<TSource,TKey>>, IComparer<TSource>)

Source:

Queryable.cs

Returns the maximum value in a generic IQueryable<T> according to a specified key selector function.

public:
generic <typename TSource, typename TKey>
[System::Runtime::CompilerServices::Extension]
 static TSource MaxBy(System::Linq::IQueryable<TSource> ^ source, System::Linq::Expressions::Expression<Func<TSource, TKey> ^> ^ keySelector, System::Collections::Generic::IComparer<TSource> ^ comparer);

public static TSource? MaxBy<TSource,TKey> (this System.Linq.IQueryable<TSource> source, System.Linq.Expressions.Expression<Func<TSource,TKey>> keySelector, System.Collections.Generic.IComparer<TSource>? comparer);

static member MaxBy : System.Linq.IQueryable<'Source> * System.Linq.Expressions.Expression<Func<'Source, 'Key>> * System.Collections.Generic.IComparer<'Source> -> 'Source

<Extension()>
Public Function MaxBy(Of TSource, TKey) (source As IQueryable(Of TSource), keySelector As Expression(Of Func(Of TSource, TKey)), comparer As IComparer(Of TSource)) As TSource

Type Parameters

TSource

The type of the elements of source.

TKey

The type of key to compare elements by.

Parameters

source

IQueryable<TSource>

A sequence of values to determine the maximum value of.

keySelector

Expression<Func<TSource,TKey>>

A function to extract the key for each element.

comparer

IComparer<TSource>

The IComparer<T> to compare keys.

Returns

TSource

The value with the maximum key in the sequence.

Exceptions

ArgumentNullException

source is null.

ArgumentException

No key extracted from source implements the IComparable or IComparable<T> interface.