Queryable.MinBy 方法

定义

命名空间:: System.Linq

程序集:: netstandard.dll, System.Linq.Queryable.dll

重要

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重载

名称	说明
MinBy<TSource,TKey>(IQueryable<TSource>, Expression<Func<TSource,TKey>>)	根据指定的键选择器函数返回泛型 IQueryable<T> 中的最小值。
MinBy<TSource,TKey>(IQueryable<TSource>, Expression<Func<TSource,TKey>>, IComparer<TKey>)	根据指定的键选择器函数返回泛型 IQueryable<T> 中的最小值。
MinBy<TSource,TKey>(IQueryable<TSource>, Expression<Func<TSource,TKey>>, IComparer<TSource>)	已过时. 根据指定的键选择器函数返回泛型 IQueryable<T> 中的最小值。

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

Source:: Queryable.cs

Source:: Queryable.cs

Source:: Queryable.cs

Source:: Queryable.cs

Source:: Queryable.cs

根据指定的键选择器函数返回泛型 IQueryable<T> 中的最小值。

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

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

[System.Diagnostics.CodeAnalysis.RequiresDynamicCode("Enumerating collections as IQueryable can require creating new generic types or methods, which requires creating code at runtime. This may not work when AOT compiling.")]
public static TSource? MinBy<TSource,TKey>(this System.Linq.IQueryable<TSource> source, System.Linq.Expressions.Expression<Func<TSource,TKey>> keySelector);

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

[<System.Diagnostics.CodeAnalysis.RequiresDynamicCode("Enumerating collections as IQueryable can require creating new generic types or methods, which requires creating code at runtime. This may not work when AOT compiling.")>]
static member MinBy : System.Linq.IQueryable<'Source> * System.Linq.Expressions.Expression<Func<'Source, 'Key>> -> 'Source

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

类型参数

TSource

的元素 source的类型。

TKey

要比较元素依据的键的类型。

参数

source: IQueryable<TSource>

要确定最小值的值序列。

keySelector: Expression<Func<TSource,TKey>>

用于提取每个元素的键的函数。

TSource

序列中具有最小键的值。

属性: RequiresDynamicCodeAttribute

例外

ArgumentNullException

source 是 null。

ArgumentException

没有从source实现或IComparable接口中提取的IComparable<T>键。

适用于

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

Source:: Queryable.cs

Source:: Queryable.cs

根据指定的键选择器函数返回泛型 IQueryable<T> 中的最小值。

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

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

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

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

类型参数

TSource

的元素 source的类型。

TKey

要比较元素依据的键的类型。

参数

source: IQueryable<TSource>

要确定最小值的值序列。

keySelector: Expression<Func<TSource,TKey>>

用于提取每个元素的键的函数。

comparer: IComparer<TKey>

要 IComparer<T> 比较键。

TSource

序列中具有最小键的值。

例外

ArgumentNullException

source 是 null。

ArgumentException

没有从source实现或IComparable接口中提取的IComparable<T>键。

适用于

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

Source:: Queryable.cs

Source:: Queryable.cs

Source:: Queryable.cs

Source:: Queryable.cs

Source:: Queryable.cs

注意

The Queryable MinBy and MaxBy taking an IComparer<TSource> are obsolete. Use the new ones that take an IComparer<TKey>.

根据指定的键选择器函数返回泛型 IQueryable<T> 中的最小值。

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

[System.Diagnostics.CodeAnalysis.RequiresDynamicCode("Enumerating collections as IQueryable can require creating new generic types or methods, which requires creating code at runtime. This may not work when AOT compiling.")]
public static TSource? MinBy<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 MinBy : System.Linq.IQueryable<'Source> * System.Linq.Expressions.Expression<Func<'Source, 'Key>> * System.Collections.Generic.IComparer<'Source> -> 'Source

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

[<System.Diagnostics.CodeAnalysis.RequiresDynamicCode("Enumerating collections as IQueryable can require creating new generic types or methods, which requires creating code at runtime. This may not work when AOT compiling.")>]
static member MinBy : System.Linq.IQueryable<'Source> * System.Linq.Expressions.Expression<Func<'Source, 'Key>> * System.Collections.Generic.IComparer<'Source> -> 'Source

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

类型参数

TSource

的元素 source的类型。

TKey

要比较元素依据的键的类型。

参数

source: IQueryable<TSource>

要确定最小值的值序列。

keySelector: Expression<Func<TSource,TKey>>

用于提取每个元素的键的函数。

comparer: IComparer<TSource>

要 IComparer<T> 比较键。

TSource

序列中具有最小键的值。

属性: ObsoleteAttribute OverloadResolutionPriorityAttribute RequiresDynamicCodeAttribute

例外

ArgumentNullException

source 是 null。

ArgumentException

没有从source实现或IComparable接口中提取的IComparable<T>键。

适用于

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