Queryable.MaxBy Method
Definition
Important
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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<TKey>) | |
| MaxBy<TSource,TKey>(IQueryable<TSource>, Expression<Func<TSource,TKey>>, IComparer<TSource>) |
Obsolete.
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
- Source:
- Queryable.cs
- 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 TSourceType 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
The value with the maximum key in the sequence.
Exceptions
source is null.
No key extracted from source implements the IComparable or IComparable<T> interface.
Applies to
MaxBy<TSource,TKey>(IQueryable<TSource>, Expression<Func<TSource,TKey>>, IComparer<TKey>)
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<TKey> ^ 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<TKey>? comparer);static member MaxBy : System.Linq.IQueryable<'Source> * System.Linq.Expressions.Expression<Func<'Source, 'Key>> * System.Collections.Generic.IComparer<'Key> -> '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 TKey)) As TSourceType Parameters
- TSource
- TKey
Parameters
- source
- IQueryable<TSource>
- keySelector
- Expression<Func<TSource,TKey>>
- comparer
- IComparer<TKey>
Returns
Applies to
MaxBy<TSource,TKey>(IQueryable<TSource>, Expression<Func<TSource,TKey>>, IComparer<TSource>)
- Source:
- Queryable.cs
- Source:
- Queryable.cs
- Source:
- Queryable.cs
Caution
The Queryable MinBy and MaxBy taking an IComparer<TSource> are obsolete. Use the new ones that take an IComparer<TKey>.
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);[System.Obsolete("The Queryable MinBy and MaxBy taking an IComparer<TSource> are obsolete. Use the new ones that take an IComparer<TKey>.", DiagnosticId="SYSLIB0061", UrlFormat="https://aka.ms/dotnet-warnings/{0}")]
[System.Runtime.CompilerServices.OverloadResolutionPriority(-1)]
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);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);[<System.Obsolete("The Queryable MinBy and MaxBy taking an IComparer<TSource> are obsolete. Use the new ones that take an IComparer<TKey>.", DiagnosticId="SYSLIB0061", UrlFormat="https://aka.ms/dotnet-warnings/{0}")>]
[<System.Runtime.CompilerServices.OverloadResolutionPriority(-1)>]
static member MaxBy : System.Linq.IQueryable<'Source> * System.Linq.Expressions.Expression<Func<'Source, 'Key>> * System.Collections.Generic.IComparer<'Source> -> 'Sourcestatic 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 TSourceType 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
The value with the maximum key in the sequence.
- Attributes
Exceptions
source is null.
No key extracted from source implements the IComparable or IComparable<T> interface.
