Enumerable Enumerable Enumerable Enumerable Class

定义

提供一组用于查询实现 IEnumerable<T> 的对象的 static(在 Visual Basic 中为 Shared)方法。Provides a set of static (Shared in Visual Basic) methods for querying objects that implement IEnumerable<T>.

public ref class Enumerable abstract sealed
public static class Enumerable
type Enumerable = class
Public Module Enumerable
继承
EnumerableEnumerableEnumerableEnumerable

注解

此类中的方法提供了标准查询运算符的实现, 用于查询实现IEnumerable<T>的数据源。The methods in this class provide an implementation of the standard query operators for querying data sources that implement IEnumerable<T>. 标准查询运算符是遵循模式的常规用途方法, LINQLINQ使您能够对任何中的数据进行遍历、筛选和投影操作。基于网络的编程语言。The standard query operators are general purpose methods that follow the LINQLINQ pattern and enable you to express traversal, filter, and projection operations over data in any .NET-based programming language.

此类中的大多数方法都定义为扩展方法IEnumerable<T>The majority of the methods in this class are defined as extension methods that extend IEnumerable<T>. 这意味着, 可以像调用实现IEnumerable<T>的任何对象上的实例方法一样调用它们。This means they can be called like an instance method on any object that implements IEnumerable<T>.

在枚举查询对象之前, 在返回值序列的查询中使用的方法不会使用目标数据。Methods that are used in a query that returns a sequence of values do not consume the target data until the query object is enumerated. 这称为 "延迟执行"。This is known as deferred execution. 在返回单一实例值的查询中使用的方法将立即执行并使用目标数据。Methods that are used in a query that returns a singleton value execute and consume the target data immediately.

方法

Aggregate<TSource,TAccumulate,TResult>(IEnumerable<TSource>, TAccumulate, Func<TAccumulate,TSource,TAccumulate>, Func<TAccumulate,TResult>) Aggregate<TSource,TAccumulate,TResult>(IEnumerable<TSource>, TAccumulate, Func<TAccumulate,TSource,TAccumulate>, Func<TAccumulate,TResult>) Aggregate<TSource,TAccumulate,TResult>(IEnumerable<TSource>, TAccumulate, Func<TAccumulate,TSource,TAccumulate>, Func<TAccumulate,TResult>) Aggregate<TSource,TAccumulate,TResult>(IEnumerable<TSource>, TAccumulate, Func<TAccumulate,TSource,TAccumulate>, Func<TAccumulate,TResult>)

对序列应用累加器函数。Applies an accumulator function over a sequence. 将指定的种子值用作累加器的初始值,并使用指定的函数选择结果值。The specified seed value is used as the initial accumulator value, and the specified function is used to select the result value.

Aggregate<TSource,TAccumulate>(IEnumerable<TSource>, TAccumulate, Func<TAccumulate,TSource,TAccumulate>) Aggregate<TSource,TAccumulate>(IEnumerable<TSource>, TAccumulate, Func<TAccumulate,TSource,TAccumulate>) Aggregate<TSource,TAccumulate>(IEnumerable<TSource>, TAccumulate, Func<TAccumulate,TSource,TAccumulate>) Aggregate<TSource,TAccumulate>(IEnumerable<TSource>, TAccumulate, Func<TAccumulate,TSource,TAccumulate>)

对序列应用累加器函数。Applies an accumulator function over a sequence. 将指定的种子值用作累加器初始值。The specified seed value is used as the initial accumulator value.

Aggregate<TSource>(IEnumerable<TSource>, Func<TSource,TSource,TSource>) Aggregate<TSource>(IEnumerable<TSource>, Func<TSource,TSource,TSource>) Aggregate<TSource>(IEnumerable<TSource>, Func<TSource,TSource,TSource>) Aggregate<TSource>(IEnumerable<TSource>, Func<TSource,TSource,TSource>)

对序列应用累加器函数。Applies an accumulator function over a sequence.

All<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) All<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) All<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) All<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>)

确定序列中的所有元素是否都满足条件。Determines whether all elements of a sequence satisfy a condition.

Any<TSource>(IEnumerable<TSource>) Any<TSource>(IEnumerable<TSource>) Any<TSource>(IEnumerable<TSource>) Any<TSource>(IEnumerable<TSource>)

确定序列是否包含任何元素。Determines whether a sequence contains any elements.

Any<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) Any<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) Any<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) Any<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>)

确定序列中是否存在任意一个元素满足条件。Determines whether any element of a sequence satisfies a condition.

Append<TSource>(IEnumerable<TSource>, TSource) Append<TSource>(IEnumerable<TSource>, TSource) Append<TSource>(IEnumerable<TSource>, TSource) Append<TSource>(IEnumerable<TSource>, TSource)

将一个值追加到序列末尾。Appends a value to the end of the sequence.

AsEnumerable<TSource>(IEnumerable<TSource>) AsEnumerable<TSource>(IEnumerable<TSource>) AsEnumerable<TSource>(IEnumerable<TSource>) AsEnumerable<TSource>(IEnumerable<TSource>)

返回类型化为 IEnumerable<T> 的输入。Returns the input typed as IEnumerable<T>.

Average(IEnumerable<Single>) Average(IEnumerable<Single>) Average(IEnumerable<Single>) Average(IEnumerable<Single>)

计算 Single 值序列的平均值。Computes the average of a sequence of Single values.

Average(IEnumerable<Nullable<Single>>) Average(IEnumerable<Nullable<Single>>) Average(IEnumerable<Nullable<Single>>) Average(IEnumerable<Nullable<Single>>)

计算可以为 null 的 Single 值序列的平均值。Computes the average of a sequence of nullable Single values.

Average(IEnumerable<Nullable<Int64>>) Average(IEnumerable<Nullable<Int64>>) Average(IEnumerable<Nullable<Int64>>) Average(IEnumerable<Nullable<Int64>>)

计算可以为 null 的 Int64 值序列的平均值。Computes the average of a sequence of nullable Int64 values.

Average(IEnumerable<Nullable<Int32>>) Average(IEnumerable<Nullable<Int32>>) Average(IEnumerable<Nullable<Int32>>) Average(IEnumerable<Nullable<Int32>>)

计算可以为 null 的 Int32 值序列的平均值。Computes the average of a sequence of nullable Int32 values.

Average(IEnumerable<Nullable<Double>>) Average(IEnumerable<Nullable<Double>>) Average(IEnumerable<Nullable<Double>>) Average(IEnumerable<Nullable<Double>>)

计算可以为 null 的 Double 值序列的平均值。Computes the average of a sequence of nullable Double values.

Average(IEnumerable<Int64>) Average(IEnumerable<Int64>) Average(IEnumerable<Int64>) Average(IEnumerable<Int64>)

计算 Int64 值序列的平均值。Computes the average of a sequence of Int64 values.

Average(IEnumerable<Int32>) Average(IEnumerable<Int32>) Average(IEnumerable<Int32>) Average(IEnumerable<Int32>)

计算 Int32 值序列的平均值。Computes the average of a sequence of Int32 values.

Average(IEnumerable<Double>) Average(IEnumerable<Double>) Average(IEnumerable<Double>) Average(IEnumerable<Double>)

计算 Double 值序列的平均值。Computes the average of a sequence of Double values.

Average(IEnumerable<Decimal>) Average(IEnumerable<Decimal>) Average(IEnumerable<Decimal>) Average(IEnumerable<Decimal>)

计算 Decimal 值序列的平均值。Computes the average of a sequence of Decimal values.

Average(IEnumerable<Nullable<Decimal>>) Average(IEnumerable<Nullable<Decimal>>) Average(IEnumerable<Nullable<Decimal>>) Average(IEnumerable<Nullable<Decimal>>)

计算可以为 null 的 Decimal 值序列的平均值。Computes the average of a sequence of nullable Decimal values.

Average<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int32>>) Average<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int32>>) Average<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int32>>) Average<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int32>>)

计算可以为 null 的 Int32 值序列的平均值,这些值可通过对输入序列的每个元素调用转换函数获得。Computes the average of a sequence of nullable Int32 values that are obtained by invoking a transform function on each element of the input sequence.

Average<TSource>(IEnumerable<TSource>, Func<TSource,Single>) Average<TSource>(IEnumerable<TSource>, Func<TSource,Single>) Average<TSource>(IEnumerable<TSource>, Func<TSource,Single>) Average<TSource>(IEnumerable<TSource>, Func<TSource,Single>)

计算 Single 值序列的平均值,这些值可通过对输入序列的每个元素调用转换函数获得。Computes the average of a sequence of Single values that are obtained by invoking a transform function on each element of the input sequence.

Average<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Single>>) Average<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Single>>) Average<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Single>>) Average<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Single>>)

计算可以为 null 的 Single 值序列的平均值,这些值可通过对输入序列的每个元素调用转换函数获得。Computes the average of a sequence of nullable Single values that are obtained by invoking a transform function on each element of the input sequence.

Average<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int64>>) Average<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int64>>) Average<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int64>>) Average<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int64>>)

计算可以为 null 的 Int64 值序列的平均值,这些值可通过对输入序列的每个元素调用转换函数获得。Computes the average of a sequence of nullable Int64 values that are obtained by invoking a transform function on each element of the input sequence.

Average<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Double>>) Average<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Double>>) Average<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Double>>) Average<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Double>>)

计算可以为 null 的 Double 值序列的平均值,这些值可通过对输入序列的每个元素调用转换函数获得。Computes the average of a sequence of nullable Double values that are obtained by invoking a transform function on each element of the input sequence.

Average<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Decimal>>) Average<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Decimal>>) Average<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Decimal>>) Average<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Decimal>>)

计算可以为 null 的 Decimal 值序列的平均值,这些值可通过对输入序列的每个元素调用转换函数获得。Computes the average of a sequence of nullable Decimal values that are obtained by invoking a transform function on each element of the input sequence.

Average<TSource>(IEnumerable<TSource>, Func<TSource,Int64>) Average<TSource>(IEnumerable<TSource>, Func<TSource,Int64>) Average<TSource>(IEnumerable<TSource>, Func<TSource,Int64>) Average<TSource>(IEnumerable<TSource>, Func<TSource,Int64>)

计算 Int64 值序列的平均值,这些值可通过对输入序列的每个元素调用转换函数获得。Computes the average of a sequence of Int64 values that are obtained by invoking a transform function on each element of the input sequence.

Average<TSource>(IEnumerable<TSource>, Func<TSource,Int32>) Average<TSource>(IEnumerable<TSource>, Func<TSource,Int32>) Average<TSource>(IEnumerable<TSource>, Func<TSource,Int32>) Average<TSource>(IEnumerable<TSource>, Func<TSource,Int32>)

计算 Int32 值序列的平均值,这些值可通过对输入序列的每个元素调用转换函数获得。Computes the average of a sequence of Int32 values that are obtained by invoking a transform function on each element of the input sequence.

Average<TSource>(IEnumerable<TSource>, Func<TSource,Double>) Average<TSource>(IEnumerable<TSource>, Func<TSource,Double>) Average<TSource>(IEnumerable<TSource>, Func<TSource,Double>) Average<TSource>(IEnumerable<TSource>, Func<TSource,Double>)

计算 Double 值序列的平均值,这些值可通过对输入序列的每个元素调用转换函数获得。Computes the average of a sequence of Double values that are obtained by invoking a transform function on each element of the input sequence.

Average<TSource>(IEnumerable<TSource>, Func<TSource,Decimal>) Average<TSource>(IEnumerable<TSource>, Func<TSource,Decimal>) Average<TSource>(IEnumerable<TSource>, Func<TSource,Decimal>) Average<TSource>(IEnumerable<TSource>, Func<TSource,Decimal>)

计算 Decimal 值序列的平均值,这些值可通过对输入序列的每个元素调用转换函数获得。Computes the average of a sequence of Decimal values that are obtained by invoking a transform function on each element of the input sequence.

Cast<TResult>(IEnumerable) Cast<TResult>(IEnumerable) Cast<TResult>(IEnumerable) Cast<TResult>(IEnumerable)

IEnumerable 的元素强制转换为指定的类型。Casts the elements of an IEnumerable to the specified type.

Concat<TSource>(IEnumerable<TSource>, IEnumerable<TSource>) Concat<TSource>(IEnumerable<TSource>, IEnumerable<TSource>) Concat<TSource>(IEnumerable<TSource>, IEnumerable<TSource>) Concat<TSource>(IEnumerable<TSource>, IEnumerable<TSource>)

连接两个序列。Concatenates two sequences.

Contains<TSource>(IEnumerable<TSource>, TSource) Contains<TSource>(IEnumerable<TSource>, TSource) Contains<TSource>(IEnumerable<TSource>, TSource) Contains<TSource>(IEnumerable<TSource>, TSource)

通过使用默认的相等比较器确定序列是否包含指定的元素。Determines whether a sequence contains a specified element by using the default equality comparer.

Contains<TSource>(IEnumerable<TSource>, TSource, IEqualityComparer<TSource>) Contains<TSource>(IEnumerable<TSource>, TSource, IEqualityComparer<TSource>) Contains<TSource>(IEnumerable<TSource>, TSource, IEqualityComparer<TSource>) Contains<TSource>(IEnumerable<TSource>, TSource, IEqualityComparer<TSource>)

通过使用指定的 IEqualityComparer<T> 确定序列是否包含指定的元素。Determines whether a sequence contains a specified element by using a specified IEqualityComparer<T>.

Count<TSource>(IEnumerable<TSource>) Count<TSource>(IEnumerable<TSource>) Count<TSource>(IEnumerable<TSource>) Count<TSource>(IEnumerable<TSource>)

返回序列中的元素数量。Returns the number of elements in a sequence.

Count<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) Count<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) Count<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) Count<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>)

返回表示在指定的序列中满足条件的元素数量的数字。Returns a number that represents how many elements in the specified sequence satisfy a condition.

DefaultIfEmpty<TSource>(IEnumerable<TSource>, TSource) DefaultIfEmpty<TSource>(IEnumerable<TSource>, TSource) DefaultIfEmpty<TSource>(IEnumerable<TSource>, TSource) DefaultIfEmpty<TSource>(IEnumerable<TSource>, TSource)

返回指定序列中的元素;如果序列为空,则返回单一实例集合中的指定值。Returns the elements of the specified sequence or the specified value in a singleton collection if the sequence is empty.

DefaultIfEmpty<TSource>(IEnumerable<TSource>) DefaultIfEmpty<TSource>(IEnumerable<TSource>) DefaultIfEmpty<TSource>(IEnumerable<TSource>) DefaultIfEmpty<TSource>(IEnumerable<TSource>)

返回指定序列中的元素;如果序列为空,则返回单一实例集合中的类型参数的默认值。Returns the elements of the specified sequence or the type parameter's default value in a singleton collection if the sequence is empty.

Distinct<TSource>(IEnumerable<TSource>) Distinct<TSource>(IEnumerable<TSource>) Distinct<TSource>(IEnumerable<TSource>) Distinct<TSource>(IEnumerable<TSource>)

通过使用默认的相等比较器对值进行比较,返回序列中的非重复元素。Returns distinct elements from a sequence by using the default equality comparer to compare values.

Distinct<TSource>(IEnumerable<TSource>, IEqualityComparer<TSource>) Distinct<TSource>(IEnumerable<TSource>, IEqualityComparer<TSource>) Distinct<TSource>(IEnumerable<TSource>, IEqualityComparer<TSource>) Distinct<TSource>(IEnumerable<TSource>, IEqualityComparer<TSource>)

通过使用指定的 IEqualityComparer<T> 对值进行比较,返回序列中的非重复元素。Returns distinct elements from a sequence by using a specified IEqualityComparer<T> to compare values.

ElementAt<TSource>(IEnumerable<TSource>, Int32) ElementAt<TSource>(IEnumerable<TSource>, Int32) ElementAt<TSource>(IEnumerable<TSource>, Int32) ElementAt<TSource>(IEnumerable<TSource>, Int32)

返回序列中指定索引处的元素。Returns the element at a specified index in a sequence.

ElementAtOrDefault<TSource>(IEnumerable<TSource>, Int32) ElementAtOrDefault<TSource>(IEnumerable<TSource>, Int32) ElementAtOrDefault<TSource>(IEnumerable<TSource>, Int32) ElementAtOrDefault<TSource>(IEnumerable<TSource>, Int32)

返回序列中指定索引处的元素;如果索引超出范围,则返回默认值。Returns the element at a specified index in a sequence or a default value if the index is out of range.

Empty<TResult>() Empty<TResult>() Empty<TResult>() Empty<TResult>()

返回具有指定类型参数的空 IEnumerable<T>Returns an empty IEnumerable<T> that has the specified type argument.

Except<TSource>(IEnumerable<TSource>, IEnumerable<TSource>) Except<TSource>(IEnumerable<TSource>, IEnumerable<TSource>) Except<TSource>(IEnumerable<TSource>, IEnumerable<TSource>) Except<TSource>(IEnumerable<TSource>, IEnumerable<TSource>)

通过使用默认的相等比较器对值进行比较,生成两个序列的差集。Produces the set difference of two sequences by using the default equality comparer to compare values.

Except<TSource>(IEnumerable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>) Except<TSource>(IEnumerable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>) Except<TSource>(IEnumerable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>) Except<TSource>(IEnumerable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>)

通过使用指定的 IEqualityComparer<T> 对值进行比较,生成两个序列的差集。Produces the set difference of two sequences by using the specified IEqualityComparer<T> to compare values.

First<TSource>(IEnumerable<TSource>) First<TSource>(IEnumerable<TSource>) First<TSource>(IEnumerable<TSource>) First<TSource>(IEnumerable<TSource>)

返回序列中的第一个元素。Returns the first element of a sequence.

First<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) First<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) First<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) First<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>)

返回序列中满足指定条件的第一个元素。Returns the first element in a sequence that satisfies a specified condition.

FirstOrDefault<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) FirstOrDefault<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) FirstOrDefault<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) FirstOrDefault<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>)

返回序列中满足条件的第一个元素;如果未找到这样的元素,则返回默认值。Returns the first element of the sequence that satisfies a condition or a default value if no such element is found.

FirstOrDefault<TSource>(IEnumerable<TSource>) FirstOrDefault<TSource>(IEnumerable<TSource>) FirstOrDefault<TSource>(IEnumerable<TSource>) FirstOrDefault<TSource>(IEnumerable<TSource>)

返回序列中的第一个元素;如果序列中不包含任何元素,则返回默认值。Returns the first element of a sequence, or a default value if the sequence contains no elements.

GroupBy<TSource,TKey,TElement,TResult>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>, Func<TKey,IEnumerable<TElement>,TResult>) GroupBy<TSource,TKey,TElement,TResult>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>, Func<TKey,IEnumerable<TElement>,TResult>) GroupBy<TSource,TKey,TElement,TResult>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>, Func<TKey,IEnumerable<TElement>,TResult>) GroupBy<TSource,TKey,TElement,TResult>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>, Func<TKey,IEnumerable<TElement>,TResult>)

根据指定的键选择器函数对序列中的元素进行分组,并且从每个组及其键中创建结果值。Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key. 通过使用指定的函数对每个组的元素进行投影。The elements of each group are projected by using a specified function.

GroupBy<TSource,TKey,TElement,TResult>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>, Func<TKey,IEnumerable<TElement>,TResult>, IEqualityComparer<TKey>) GroupBy<TSource,TKey,TElement,TResult>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>, Func<TKey,IEnumerable<TElement>,TResult>, IEqualityComparer<TKey>) GroupBy<TSource,TKey,TElement,TResult>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>, Func<TKey,IEnumerable<TElement>,TResult>, IEqualityComparer<TKey>) GroupBy<TSource,TKey,TElement,TResult>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>, Func<TKey,IEnumerable<TElement>,TResult>, IEqualityComparer<TKey>)

根据指定的键选择器函数对序列中的元素进行分组,并且从每个组及其键中创建结果值。Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key. 通过使用指定的比较器对键值进行比较,并且通过使用指定的函数对每个组的元素进行投影。Key values are compared by using a specified comparer, and the elements of each group are projected by using a specified function.

GroupBy<TSource,TKey,TElement>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>) GroupBy<TSource,TKey,TElement>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>) GroupBy<TSource,TKey,TElement>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>) GroupBy<TSource,TKey,TElement>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>)

根据指定的键选择器函数对序列中的元素进行分组,并且通过使用指定的函数对每个组中的元素进行投影。Groups the elements of a sequence according to a specified key selector function and projects the elements for each group by using a specified function.

GroupBy<TSource,TKey,TElement>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>, IEqualityComparer<TKey>) GroupBy<TSource,TKey,TElement>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>, IEqualityComparer<TKey>) GroupBy<TSource,TKey,TElement>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>, IEqualityComparer<TKey>) GroupBy<TSource,TKey,TElement>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>, IEqualityComparer<TKey>)

根据键选择器函数对序列中的元素进行分组。Groups the elements of a sequence according to a key selector function. 通过使用比较器对键进行比较,并且通过使用指定的函数对每个组的元素进行投影。The keys are compared by using a comparer and each group's elements are projected by using a specified function.

GroupBy<TSource,TKey,TResult>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TKey,IEnumerable<TSource>,TResult>) GroupBy<TSource,TKey,TResult>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TKey,IEnumerable<TSource>,TResult>) GroupBy<TSource,TKey,TResult>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TKey,IEnumerable<TSource>,TResult>) GroupBy<TSource,TKey,TResult>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TKey,IEnumerable<TSource>,TResult>)

根据指定的键选择器函数对序列中的元素进行分组,并且从每个组及其键中创建结果值。Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key.

GroupBy<TSource,TKey,TResult>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TKey,IEnumerable<TSource>,TResult>, IEqualityComparer<TKey>) GroupBy<TSource,TKey,TResult>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TKey,IEnumerable<TSource>,TResult>, IEqualityComparer<TKey>) GroupBy<TSource,TKey,TResult>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TKey,IEnumerable<TSource>,TResult>, IEqualityComparer<TKey>) GroupBy<TSource,TKey,TResult>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TKey,IEnumerable<TSource>,TResult>, IEqualityComparer<TKey>)

根据指定的键选择器函数对序列中的元素进行分组,并且从每个组及其键中创建结果值。Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key. 通过使用指定的比较器对键进行比较。The keys are compared by using a specified comparer.

GroupBy<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>) GroupBy<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>) GroupBy<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>) GroupBy<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>)

根据指定的键选择器函数对序列中的元素进行分组。Groups the elements of a sequence according to a specified key selector function.

GroupBy<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IEqualityComparer<TKey>) GroupBy<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IEqualityComparer<TKey>) GroupBy<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IEqualityComparer<TKey>) GroupBy<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IEqualityComparer<TKey>)

根据指定的键选择器函数对序列中的元素进行分组,并使用指定的比较器对键进行比较。Groups the elements of a sequence according to a specified key selector function and compares the keys by using a specified comparer.

GroupJoin<TOuter,TInner,TKey,TResult>(IEnumerable<TOuter>, IEnumerable<TInner>, Func<TOuter,TKey>, Func<TInner,TKey>, Func<TOuter,IEnumerable<TInner>,TResult>, IEqualityComparer<TKey>) GroupJoin<TOuter,TInner,TKey,TResult>(IEnumerable<TOuter>, IEnumerable<TInner>, Func<TOuter,TKey>, Func<TInner,TKey>, Func<TOuter,IEnumerable<TInner>,TResult>, IEqualityComparer<TKey>) GroupJoin<TOuter,TInner,TKey,TResult>(IEnumerable<TOuter>, IEnumerable<TInner>, Func<TOuter,TKey>, Func<TInner,TKey>, Func<TOuter,IEnumerable<TInner>,TResult>, IEqualityComparer<TKey>) GroupJoin<TOuter,TInner,TKey,TResult>(IEnumerable<TOuter>, IEnumerable<TInner>, Func<TOuter,TKey>, Func<TInner,TKey>, Func<TOuter,IEnumerable<TInner>,TResult>, IEqualityComparer<TKey>)

基于键值等同性对两个序列的元素进行关联,并对结果进行分组。Correlates the elements of two sequences based on key equality and groups the results. 使用指定的 IEqualityComparer<T> 对键进行比较。A specified IEqualityComparer<T> is used to compare keys.

GroupJoin<TOuter,TInner,TKey,TResult>(IEnumerable<TOuter>, IEnumerable<TInner>, Func<TOuter,TKey>, Func<TInner,TKey>, Func<TOuter,IEnumerable<TInner>,TResult>) GroupJoin<TOuter,TInner,TKey,TResult>(IEnumerable<TOuter>, IEnumerable<TInner>, Func<TOuter,TKey>, Func<TInner,TKey>, Func<TOuter,IEnumerable<TInner>,TResult>) GroupJoin<TOuter,TInner,TKey,TResult>(IEnumerable<TOuter>, IEnumerable<TInner>, Func<TOuter,TKey>, Func<TInner,TKey>, Func<TOuter,IEnumerable<TInner>,TResult>) GroupJoin<TOuter,TInner,TKey,TResult>(IEnumerable<TOuter>, IEnumerable<TInner>, Func<TOuter,TKey>, Func<TInner,TKey>, Func<TOuter,IEnumerable<TInner>,TResult>)

基于键值等同性对两个序列的元素进行关联,并对结果进行分组。Correlates the elements of two sequences based on equality of keys and groups the results. 使用默认的相等比较器对键进行比较。The default equality comparer is used to compare keys.

Intersect<TSource>(IEnumerable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>) Intersect<TSource>(IEnumerable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>) Intersect<TSource>(IEnumerable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>) Intersect<TSource>(IEnumerable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>)

通过使用指定的 IEqualityComparer<T> 对值进行比较,生成两个序列的交集。Produces the set intersection of two sequences by using the specified IEqualityComparer<T> to compare values.

Intersect<TSource>(IEnumerable<TSource>, IEnumerable<TSource>) Intersect<TSource>(IEnumerable<TSource>, IEnumerable<TSource>) Intersect<TSource>(IEnumerable<TSource>, IEnumerable<TSource>) Intersect<TSource>(IEnumerable<TSource>, IEnumerable<TSource>)

通过使用默认的相等比较器对值进行比较,生成两个序列的交集。Produces the set intersection of two sequences by using the default equality comparer to compare values.

Join<TOuter,TInner,TKey,TResult>(IEnumerable<TOuter>, IEnumerable<TInner>, Func<TOuter,TKey>, Func<TInner,TKey>, Func<TOuter,TInner,TResult>) Join<TOuter,TInner,TKey,TResult>(IEnumerable<TOuter>, IEnumerable<TInner>, Func<TOuter,TKey>, Func<TInner,TKey>, Func<TOuter,TInner,TResult>) Join<TOuter,TInner,TKey,TResult>(IEnumerable<TOuter>, IEnumerable<TInner>, Func<TOuter,TKey>, Func<TInner,TKey>, Func<TOuter,TInner,TResult>) Join<TOuter,TInner,TKey,TResult>(IEnumerable<TOuter>, IEnumerable<TInner>, Func<TOuter,TKey>, Func<TInner,TKey>, Func<TOuter,TInner,TResult>)

基于匹配键对两个序列的元素进行关联。Correlates the elements of two sequences based on matching keys. 使用默认的相等比较器对键进行比较。The default equality comparer is used to compare keys.

Join<TOuter,TInner,TKey,TResult>(IEnumerable<TOuter>, IEnumerable<TInner>, Func<TOuter,TKey>, Func<TInner,TKey>, Func<TOuter,TInner,TResult>, IEqualityComparer<TKey>) Join<TOuter,TInner,TKey,TResult>(IEnumerable<TOuter>, IEnumerable<TInner>, Func<TOuter,TKey>, Func<TInner,TKey>, Func<TOuter,TInner,TResult>, IEqualityComparer<TKey>) Join<TOuter,TInner,TKey,TResult>(IEnumerable<TOuter>, IEnumerable<TInner>, Func<TOuter,TKey>, Func<TInner,TKey>, Func<TOuter,TInner,TResult>, IEqualityComparer<TKey>) Join<TOuter,TInner,TKey,TResult>(IEnumerable<TOuter>, IEnumerable<TInner>, Func<TOuter,TKey>, Func<TInner,TKey>, Func<TOuter,TInner,TResult>, IEqualityComparer<TKey>)

基于匹配键对两个序列的元素进行关联。Correlates the elements of two sequences based on matching keys. 使用指定的 IEqualityComparer<T> 对键进行比较。A specified IEqualityComparer<T> is used to compare keys.

Last<TSource>(IEnumerable<TSource>) Last<TSource>(IEnumerable<TSource>) Last<TSource>(IEnumerable<TSource>) Last<TSource>(IEnumerable<TSource>)

返回序列的最后一个元素。Returns the last element of a sequence.

Last<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) Last<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) Last<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) Last<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>)

返回序列中满足指定条件的最后一个元素。Returns the last element of a sequence that satisfies a specified condition.

LastOrDefault<TSource>(IEnumerable<TSource>) LastOrDefault<TSource>(IEnumerable<TSource>) LastOrDefault<TSource>(IEnumerable<TSource>) LastOrDefault<TSource>(IEnumerable<TSource>)

返回序列中的最后一个元素;如果序列中不包含任何元素,则返回默认值。Returns the last element of a sequence, or a default value if the sequence contains no elements.

LastOrDefault<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) LastOrDefault<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) LastOrDefault<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) LastOrDefault<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>)

返回序列中满足条件的最后一个元素;如果未找到这样的元素,则返回默认值。Returns the last element of a sequence that satisfies a condition or a default value if no such element is found.

LongCount<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) LongCount<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) LongCount<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) LongCount<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>)

返回表示序列中满足条件的元素的数量的 Int64Returns an Int64 that represents how many elements in a sequence satisfy a condition.

LongCount<TSource>(IEnumerable<TSource>) LongCount<TSource>(IEnumerable<TSource>) LongCount<TSource>(IEnumerable<TSource>) LongCount<TSource>(IEnumerable<TSource>)

返回表示序列中元素总数的 Int64Returns an Int64 that represents the total number of elements in a sequence.

Max(IEnumerable<Nullable<Single>>) Max(IEnumerable<Nullable<Single>>) Max(IEnumerable<Nullable<Single>>) Max(IEnumerable<Nullable<Single>>)

返回可以为 null 的 Single 值序列中的最大值。Returns the maximum value in a sequence of nullable Single values.

Max(IEnumerable<Int32>) Max(IEnumerable<Int32>) Max(IEnumerable<Int32>) Max(IEnumerable<Int32>)

返回 Int32 值序列中的最大值。Returns the maximum value in a sequence of Int32 values.

Max(IEnumerable<Nullable<Int64>>) Max(IEnumerable<Nullable<Int64>>) Max(IEnumerable<Nullable<Int64>>) Max(IEnumerable<Nullable<Int64>>)

返回可以为 null 的 Int64 值序列中的最大值。Returns the maximum value in a sequence of nullable Int64 values.

Max(IEnumerable<Single>) Max(IEnumerable<Single>) Max(IEnumerable<Single>) Max(IEnumerable<Single>)

返回 Single 值序列中的最大值。Returns the maximum value in a sequence of Single values.

Max(IEnumerable<Nullable<Int32>>) Max(IEnumerable<Nullable<Int32>>) Max(IEnumerable<Nullable<Int32>>) Max(IEnumerable<Nullable<Int32>>)

返回可以为 null 的 Int32 值序列中的最大值。Returns the maximum value in a sequence of nullable Int32 values.

Max(IEnumerable<Decimal>) Max(IEnumerable<Decimal>) Max(IEnumerable<Decimal>) Max(IEnumerable<Decimal>)

返回 Decimal 值序列中的最大值。Returns the maximum value in a sequence of Decimal values.

Max(IEnumerable<Nullable<Decimal>>) Max(IEnumerable<Nullable<Decimal>>) Max(IEnumerable<Nullable<Decimal>>) Max(IEnumerable<Nullable<Decimal>>)

返回可以为 null 的 Decimal 值序列中的最大值。Returns the maximum value in a sequence of nullable Decimal values.

Max(IEnumerable<Int64>) Max(IEnumerable<Int64>) Max(IEnumerable<Int64>) Max(IEnumerable<Int64>)

返回 Int64 值序列中的最大值。Returns the maximum value in a sequence of Int64 values.

Max(IEnumerable<Double>) Max(IEnumerable<Double>) Max(IEnumerable<Double>) Max(IEnumerable<Double>)

返回 Double 值序列中的最大值。Returns the maximum value in a sequence of Double values.

Max(IEnumerable<Nullable<Double>>) Max(IEnumerable<Nullable<Double>>) Max(IEnumerable<Nullable<Double>>) Max(IEnumerable<Nullable<Double>>)

返回可以为 null 的 Double 值序列中的最大值。Returns the maximum value in a sequence of nullable Double values.

Max<TSource,TResult>(IEnumerable<TSource>, Func<TSource,TResult>) Max<TSource,TResult>(IEnumerable<TSource>, Func<TSource,TResult>) Max<TSource,TResult>(IEnumerable<TSource>, Func<TSource,TResult>) Max<TSource,TResult>(IEnumerable<TSource>, Func<TSource,TResult>)

对序列中的每个元素调用转换函数,并返回最大结果值。Invokes a transform function on each element of a generic sequence and returns the maximum resulting value.

Max<TSource>(IEnumerable<TSource>, Func<TSource,Single>) Max<TSource>(IEnumerable<TSource>, Func<TSource,Single>) Max<TSource>(IEnumerable<TSource>, Func<TSource,Single>) Max<TSource>(IEnumerable<TSource>, Func<TSource,Single>)

对序列中的每个元素调用转换函数,并返回最大的 Single 值。Invokes a transform function on each element of a sequence and returns the maximum Single value.

Max<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Single>>) Max<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Single>>) Max<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Single>>) Max<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Single>>)

对序列中的每个元素调用转换函数,并返回可以为 null 的最大的 Single 值。Invokes a transform function on each element of a sequence and returns the maximum nullable Single value.

Max<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int64>>) Max<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int64>>) Max<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int64>>) Max<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int64>>)

对序列中的每个元素调用转换函数,并返回可以为 null 的最大的 Int64 值。Invokes a transform function on each element of a sequence and returns the maximum nullable Int64 value.

Max<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int32>>) Max<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int32>>) Max<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int32>>) Max<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int32>>)

对序列中的每个元素调用转换函数,并返回可以为 null 的最大的 Int32 值。Invokes a transform function on each element of a sequence and returns the maximum nullable Int32 value.

Max<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Double>>) Max<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Double>>) Max<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Double>>) Max<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Double>>)

对序列中的每个元素调用转换函数,并返回可以为 null 的最大的 Double 值。Invokes a transform function on each element of a sequence and returns the maximum nullable Double value.

Max<TSource>(IEnumerable<TSource>, Func<TSource,Int64>) Max<TSource>(IEnumerable<TSource>, Func<TSource,Int64>) Max<TSource>(IEnumerable<TSource>, Func<TSource,Int64>) Max<TSource>(IEnumerable<TSource>, Func<TSource,Int64>)

对序列中的每个元素调用转换函数,并返回最大的 Int64 值。Invokes a transform function on each element of a sequence and returns the maximum Int64 value.

Max<TSource>(IEnumerable<TSource>, Func<TSource,Int32>) Max<TSource>(IEnumerable<TSource>, Func<TSource,Int32>) Max<TSource>(IEnumerable<TSource>, Func<TSource,Int32>) Max<TSource>(IEnumerable<TSource>, Func<TSource,Int32>)

对序列中的每个元素调用转换函数,并返回最大的 Int32 值。Invokes a transform function on each element of a sequence and returns the maximum Int32 value.

Max<TSource>(IEnumerable<TSource>, Func<TSource,Double>) Max<TSource>(IEnumerable<TSource>, Func<TSource,Double>) Max<TSource>(IEnumerable<TSource>, Func<TSource,Double>) Max<TSource>(IEnumerable<TSource>, Func<TSource,Double>)

对序列中的每个元素调用转换函数,并返回最大的 Double 值。Invokes a transform function on each element of a sequence and returns the maximum Double value.

Max<TSource>(IEnumerable<TSource>, Func<TSource,Decimal>) Max<TSource>(IEnumerable<TSource>, Func<TSource,Decimal>) Max<TSource>(IEnumerable<TSource>, Func<TSource,Decimal>) Max<TSource>(IEnumerable<TSource>, Func<TSource,Decimal>)

对序列中的每个元素调用转换函数,并返回最大的 Decimal 值。Invokes a transform function on each element of a sequence and returns the maximum Decimal value.

Max<TSource>(IEnumerable<TSource>) Max<TSource>(IEnumerable<TSource>) Max<TSource>(IEnumerable<TSource>) Max<TSource>(IEnumerable<TSource>)

返回泛型序列中的最大值。Returns the maximum value in a generic sequence.

Max<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Decimal>>) Max<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Decimal>>) Max<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Decimal>>) Max<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Decimal>>)

对序列中的每个元素调用转换函数,并返回可以为 null 的最大的 Decimal 值。Invokes a transform function on each element of a sequence and returns the maximum nullable Decimal value.

Min(IEnumerable<Nullable<Int64>>) Min(IEnumerable<Nullable<Int64>>) Min(IEnumerable<Nullable<Int64>>) Min(IEnumerable<Nullable<Int64>>)

返回可以为 null 的 Int64 值序列中的最小值。Returns the minimum value in a sequence of nullable Int64 values.

Min(IEnumerable<Nullable<Int32>>) Min(IEnumerable<Nullable<Int32>>) Min(IEnumerable<Nullable<Int32>>) Min(IEnumerable<Nullable<Int32>>)

返回可以为 null 的 Int32 值序列中的最小值。Returns the minimum value in a sequence of nullable Int32 values.

Min(IEnumerable<Single>) Min(IEnumerable<Single>) Min(IEnumerable<Single>) Min(IEnumerable<Single>)

返回 Single 值序列中的最小值。Returns the minimum value in a sequence of Single values.

Min(IEnumerable<Nullable<Single>>) Min(IEnumerable<Nullable<Single>>) Min(IEnumerable<Nullable<Single>>) Min(IEnumerable<Nullable<Single>>)

返回可以为 null 的 Single 值序列中的最小值。Returns the minimum value in a sequence of nullable Single values.

Min(IEnumerable<Nullable<Double>>) Min(IEnumerable<Nullable<Double>>) Min(IEnumerable<Nullable<Double>>) Min(IEnumerable<Nullable<Double>>)

返回可以为 null 的 Double 值序列中的最小值。Returns the minimum value in a sequence of nullable Double values.

Min(IEnumerable<Double>) Min(IEnumerable<Double>) Min(IEnumerable<Double>) Min(IEnumerable<Double>)

返回 Double 值序列中的最小值。Returns the minimum value in a sequence of Double values.

Min(IEnumerable<Int64>) Min(IEnumerable<Int64>) Min(IEnumerable<Int64>) Min(IEnumerable<Int64>)

返回 Int64 值序列中的最小值。Returns the minimum value in a sequence of Int64 values.

Min(IEnumerable<Int32>) Min(IEnumerable<Int32>) Min(IEnumerable<Int32>) Min(IEnumerable<Int32>)

返回 Int32 值序列中的最小值。Returns the minimum value in a sequence of Int32 values.

Min(IEnumerable<Nullable<Decimal>>) Min(IEnumerable<Nullable<Decimal>>) Min(IEnumerable<Nullable<Decimal>>) Min(IEnumerable<Nullable<Decimal>>)

返回可以为 null 的 Decimal 值序列中的最小值。Returns the minimum value in a sequence of nullable Decimal values.

Min(IEnumerable<Decimal>) Min(IEnumerable<Decimal>) Min(IEnumerable<Decimal>) Min(IEnumerable<Decimal>)

返回 Decimal 值序列中的最小值。Returns the minimum value in a sequence of Decimal values.

Min<TSource,TResult>(IEnumerable<TSource>, Func<TSource,TResult>) Min<TSource,TResult>(IEnumerable<TSource>, Func<TSource,TResult>) Min<TSource,TResult>(IEnumerable<TSource>, Func<TSource,TResult>) Min<TSource,TResult>(IEnumerable<TSource>, Func<TSource,TResult>)

对序列中的每个元素调用转换函数,并返回最小结果值。Invokes a transform function on each element of a generic sequence and returns the minimum resulting value.

Min<TSource>(IEnumerable<TSource>, Func<TSource,Single>) Min<TSource>(IEnumerable<TSource>, Func<TSource,Single>) Min<TSource>(IEnumerable<TSource>, Func<TSource,Single>) Min<TSource>(IEnumerable<TSource>, Func<TSource,Single>)

对序列中的每个元素调用转换函数,并返回最小的 Single 值。Invokes a transform function on each element of a sequence and returns the minimum Single value.

Min<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Single>>) Min<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Single>>) Min<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Single>>) Min<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Single>>)

对序列中的每个元素调用转换函数,并返回可以为 null 的最小的 Single 值。Invokes a transform function on each element of a sequence and returns the minimum nullable Single value.

Min<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int64>>) Min<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int64>>) Min<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int64>>) Min<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int64>>)

对序列中的每个元素调用转换函数,并返回可以为 null 的最小的 Int64 值。Invokes a transform function on each element of a sequence and returns the minimum nullable Int64 value.

Min<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int32>>) Min<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int32>>) Min<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int32>>) Min<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int32>>)

对序列中的每个元素调用转换函数,并返回可以为 null 的最小的 Int32 值。Invokes a transform function on each element of a sequence and returns the minimum nullable Int32 value.

Min<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Double>>) Min<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Double>>) Min<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Double>>) Min<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Double>>)

对序列中的每个元素调用转换函数,并返回可以为 null 的最小的 Double 值。Invokes a transform function on each element of a sequence and returns the minimum nullable Double value.

Min<TSource>(IEnumerable<TSource>, Func<TSource,Int64>) Min<TSource>(IEnumerable<TSource>, Func<TSource,Int64>) Min<TSource>(IEnumerable<TSource>, Func<TSource,Int64>) Min<TSource>(IEnumerable<TSource>, Func<TSource,Int64>)

对序列中的每个元素调用转换函数,并返回最小的 Int64 值。Invokes a transform function on each element of a sequence and returns the minimum Int64 value.

Min<TSource>(IEnumerable<TSource>, Func<TSource,Int32>) Min<TSource>(IEnumerable<TSource>, Func<TSource,Int32>) Min<TSource>(IEnumerable<TSource>, Func<TSource,Int32>) Min<TSource>(IEnumerable<TSource>, Func<TSource,Int32>)

对序列中的每个元素调用转换函数,并返回最小的 Int32 值。Invokes a transform function on each element of a sequence and returns the minimum Int32 value.

Min<TSource>(IEnumerable<TSource>, Func<TSource,Double>) Min<TSource>(IEnumerable<TSource>, Func<TSource,Double>) Min<TSource>(IEnumerable<TSource>, Func<TSource,Double>) Min<TSource>(IEnumerable<TSource>, Func<TSource,Double>)

对序列中的每个元素调用转换函数,并返回最小的 Double 值。Invokes a transform function on each element of a sequence and returns the minimum Double value.

Min<TSource>(IEnumerable<TSource>, Func<TSource,Decimal>) Min<TSource>(IEnumerable<TSource>, Func<TSource,Decimal>) Min<TSource>(IEnumerable<TSource>, Func<TSource,Decimal>) Min<TSource>(IEnumerable<TSource>, Func<TSource,Decimal>)

对序列中的每个元素调用转换函数,并返回最小的 Decimal 值。Invokes a transform function on each element of a sequence and returns the minimum Decimal value.

Min<TSource>(IEnumerable<TSource>) Min<TSource>(IEnumerable<TSource>) Min<TSource>(IEnumerable<TSource>) Min<TSource>(IEnumerable<TSource>)

返回泛型序列中的最小值。Returns the minimum value in a generic sequence.

Min<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Decimal>>) Min<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Decimal>>) Min<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Decimal>>) Min<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Decimal>>)

对序列中的每个元素调用转换函数,并返回可以为 null 的最小的 Decimal 值。Invokes a transform function on each element of a sequence and returns the minimum nullable Decimal value.

OfType<TResult>(IEnumerable) OfType<TResult>(IEnumerable) OfType<TResult>(IEnumerable) OfType<TResult>(IEnumerable)

根据指定类型筛选 IEnumerable 的元素。Filters the elements of an IEnumerable based on a specified type.

OrderBy<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>) OrderBy<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>) OrderBy<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>) OrderBy<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>)

根据键按升序对序列的元素进行排序。Sorts the elements of a sequence in ascending order according to a key.

OrderBy<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IComparer<TKey>) OrderBy<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IComparer<TKey>) OrderBy<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IComparer<TKey>) OrderBy<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IComparer<TKey>)

使用指定的比较器按升序对序列的元素进行排序。Sorts the elements of a sequence in ascending order by using a specified comparer.

OrderByDescending<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IComparer<TKey>) OrderByDescending<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IComparer<TKey>) OrderByDescending<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IComparer<TKey>) OrderByDescending<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IComparer<TKey>)

使用指定的比较器按降序对序列的元素排序。Sorts the elements of a sequence in descending order by using a specified comparer.

OrderByDescending<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>) OrderByDescending<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>) OrderByDescending<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>) OrderByDescending<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>)

根据键按降序对序列的元素进行排序。Sorts the elements of a sequence in descending order according to a key.

Prepend<TSource>(IEnumerable<TSource>, TSource) Prepend<TSource>(IEnumerable<TSource>, TSource) Prepend<TSource>(IEnumerable<TSource>, TSource) Prepend<TSource>(IEnumerable<TSource>, TSource)

向序列的开头添加值。Adds a value to the beginning of the sequence.

Range(Int32, Int32) Range(Int32, Int32) Range(Int32, Int32) Range(Int32, Int32)

生成指定范围内的整数的序列。Generates a sequence of integral numbers within a specified range.

Repeat<TResult>(TResult, Int32) Repeat<TResult>(TResult, Int32) Repeat<TResult>(TResult, Int32) Repeat<TResult>(TResult, Int32)

生成包含一个重复值的序列。Generates a sequence that contains one repeated value.

Reverse<TSource>(IEnumerable<TSource>) Reverse<TSource>(IEnumerable<TSource>) Reverse<TSource>(IEnumerable<TSource>) Reverse<TSource>(IEnumerable<TSource>)

反转序列中元素的顺序。Inverts the order of the elements in a sequence.

Select<TSource,TResult>(IEnumerable<TSource>, Func<TSource,Int32,TResult>) Select<TSource,TResult>(IEnumerable<TSource>, Func<TSource,Int32,TResult>) Select<TSource,TResult>(IEnumerable<TSource>, Func<TSource,Int32,TResult>) Select<TSource,TResult>(IEnumerable<TSource>, Func<TSource,Int32,TResult>)

通过合并元素的索引,将序列的每个元素投影到新窗体中。Projects each element of a sequence into a new form by incorporating the element's index.

Select<TSource,TResult>(IEnumerable<TSource>, Func<TSource,TResult>) Select<TSource,TResult>(IEnumerable<TSource>, Func<TSource,TResult>) Select<TSource,TResult>(IEnumerable<TSource>, Func<TSource,TResult>) Select<TSource,TResult>(IEnumerable<TSource>, Func<TSource,TResult>)

将序列中的每个元素投影到新表单。Projects each element of a sequence into a new form.

SelectMany<TSource,TCollection,TResult>(IEnumerable<TSource>, Func<TSource,IEnumerable<TCollection>>, Func<TSource,TCollection,TResult>) SelectMany<TSource,TCollection,TResult>(IEnumerable<TSource>, Func<TSource,IEnumerable<TCollection>>, Func<TSource,TCollection,TResult>) SelectMany<TSource,TCollection,TResult>(IEnumerable<TSource>, Func<TSource,IEnumerable<TCollection>>, Func<TSource,TCollection,TResult>) SelectMany<TSource,TCollection,TResult>(IEnumerable<TSource>, Func<TSource,IEnumerable<TCollection>>, Func<TSource,TCollection,TResult>)

将序列的每个元素投影到 IEnumerable<T>,并将结果序列合并为一个序列,并对其中每个元素调用结果选择器函数。Projects each element of a sequence to an IEnumerable<T>, flattens the resulting sequences into one sequence, and invokes a result selector function on each element therein.

SelectMany<TSource,TCollection,TResult>(IEnumerable<TSource>, Func<TSource,Int32,IEnumerable<TCollection>>, Func<TSource,TCollection,TResult>) SelectMany<TSource,TCollection,TResult>(IEnumerable<TSource>, Func<TSource,Int32,IEnumerable<TCollection>>, Func<TSource,TCollection,TResult>) SelectMany<TSource,TCollection,TResult>(IEnumerable<TSource>, Func<TSource,Int32,IEnumerable<TCollection>>, Func<TSource,TCollection,TResult>) SelectMany<TSource,TCollection,TResult>(IEnumerable<TSource>, Func<TSource,Int32,IEnumerable<TCollection>>, Func<TSource,TCollection,TResult>)

将序列的每个元素投影到 IEnumerable<T>,并将结果序列合并为一个序列,并对其中每个元素调用结果选择器函数。Projects each element of a sequence to an IEnumerable<T>, flattens the resulting sequences into one sequence, and invokes a result selector function on each element therein. 每个源元素的索引用于该元素的中间投影表。The index of each source element is used in the intermediate projected form of that element.

SelectMany<TSource,TResult>(IEnumerable<TSource>, Func<TSource,IEnumerable<TResult>>) SelectMany<TSource,TResult>(IEnumerable<TSource>, Func<TSource,IEnumerable<TResult>>) SelectMany<TSource,TResult>(IEnumerable<TSource>, Func<TSource,IEnumerable<TResult>>) SelectMany<TSource,TResult>(IEnumerable<TSource>, Func<TSource,IEnumerable<TResult>>)

将序列的每个元素投影到 IEnumerable<T> 并将结果序列合并为一个序列。Projects each element of a sequence to an IEnumerable<T> and flattens the resulting sequences into one sequence.

SelectMany<TSource,TResult>(IEnumerable<TSource>, Func<TSource,Int32,IEnumerable<TResult>>) SelectMany<TSource,TResult>(IEnumerable<TSource>, Func<TSource,Int32,IEnumerable<TResult>>) SelectMany<TSource,TResult>(IEnumerable<TSource>, Func<TSource,Int32,IEnumerable<TResult>>) SelectMany<TSource,TResult>(IEnumerable<TSource>, Func<TSource,Int32,IEnumerable<TResult>>)

将序列的每个元素投影到 IEnumerable<T> 并将结果序列合并为一个序列。Projects each element of a sequence to an IEnumerable<T>, and flattens the resulting sequences into one sequence. 每个源元素的索引用于该元素的投影表。The index of each source element is used in the projected form of that element.

SequenceEqual<TSource>(IEnumerable<TSource>, IEnumerable<TSource>) SequenceEqual<TSource>(IEnumerable<TSource>, IEnumerable<TSource>) SequenceEqual<TSource>(IEnumerable<TSource>, IEnumerable<TSource>) SequenceEqual<TSource>(IEnumerable<TSource>, IEnumerable<TSource>)

通过使用相应类型的默认相等比较器对序列的元素进行比较,以确定两个序列是否相等。Determines whether two sequences are equal by comparing the elements by using the default equality comparer for their type.

SequenceEqual<TSource>(IEnumerable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>) SequenceEqual<TSource>(IEnumerable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>) SequenceEqual<TSource>(IEnumerable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>) SequenceEqual<TSource>(IEnumerable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>)

通过使用指定的 IEqualityComparer<T> 来比较两个序列的元素,以确定这两个序列是否相等。Determines whether two sequences are equal by comparing their elements by using a specified IEqualityComparer<T>.

Single<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) Single<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) Single<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) Single<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>)

返回序列中满足指定条件的唯一元素;如果有多个这样的元素存在,则会引发异常。Returns the only element of a sequence that satisfies a specified condition, and throws an exception if more than one such element exists.

Single<TSource>(IEnumerable<TSource>) Single<TSource>(IEnumerable<TSource>) Single<TSource>(IEnumerable<TSource>) Single<TSource>(IEnumerable<TSource>)

返回序列的唯一元素;如果该序列并非恰好包含一个元素,则会引发异常。Returns the only element of a sequence, and throws an exception if there is not exactly one element in the sequence.

SingleOrDefault<TSource>(IEnumerable<TSource>) SingleOrDefault<TSource>(IEnumerable<TSource>) SingleOrDefault<TSource>(IEnumerable<TSource>) SingleOrDefault<TSource>(IEnumerable<TSource>)

返回序列中的唯一元素;如果该序列为空,则返回默认值;如果该序列包含多个元素,此方法将引发异常。Returns the only element of a sequence, or a default value if the sequence is empty; this method throws an exception if there is more than one element in the sequence.

SingleOrDefault<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) SingleOrDefault<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) SingleOrDefault<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) SingleOrDefault<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>)

返回序列中满足指定条件的唯一元素;如果这类元素不存在,则返回默认值;如果有多个元素满足该条件,此方法将引发异常。Returns the only element of a sequence that satisfies a specified condition or a default value if no such element exists; this method throws an exception if more than one element satisfies the condition.

Skip<TSource>(IEnumerable<TSource>, Int32) Skip<TSource>(IEnumerable<TSource>, Int32) Skip<TSource>(IEnumerable<TSource>, Int32) Skip<TSource>(IEnumerable<TSource>, Int32)

跳过序列中指定数量的元素,然后返回剩余的元素。Bypasses a specified number of elements in a sequence and then returns the remaining elements.

SkipLast<TSource>(IEnumerable<TSource>, Int32) SkipLast<TSource>(IEnumerable<TSource>, Int32) SkipLast<TSource>(IEnumerable<TSource>, Int32) SkipLast<TSource>(IEnumerable<TSource>, Int32)
SkipWhile<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) SkipWhile<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) SkipWhile<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) SkipWhile<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>)

如果指定的条件为 true,则跳过序列中的元素,然后返回剩余的元素。Bypasses elements in a sequence as long as a specified condition is true and then returns the remaining elements.

SkipWhile<TSource>(IEnumerable<TSource>, Func<TSource,Int32,Boolean>) SkipWhile<TSource>(IEnumerable<TSource>, Func<TSource,Int32,Boolean>) SkipWhile<TSource>(IEnumerable<TSource>, Func<TSource,Int32,Boolean>) SkipWhile<TSource>(IEnumerable<TSource>, Func<TSource,Int32,Boolean>)

如果指定的条件为 true,则跳过序列中的元素,然后返回剩余的元素。Bypasses elements in a sequence as long as a specified condition is true and then returns the remaining elements. 将在谓词函数的逻辑中使用元素的索引。The element's index is used in the logic of the predicate function.

Sum(IEnumerable<Nullable<Int32>>) Sum(IEnumerable<Nullable<Int32>>) Sum(IEnumerable<Nullable<Int32>>) Sum(IEnumerable<Nullable<Int32>>)

计算可以为 null 的 Int32 值序列的总和。Computes the sum of a sequence of nullable Int32 values.

Sum(IEnumerable<Nullable<Single>>) Sum(IEnumerable<Nullable<Single>>) Sum(IEnumerable<Nullable<Single>>) Sum(IEnumerable<Nullable<Single>>)

计算可以为 null 的 Single 值序列的总和。Computes the sum of a sequence of nullable Single values.

Sum(IEnumerable<Nullable<Int64>>) Sum(IEnumerable<Nullable<Int64>>) Sum(IEnumerable<Nullable<Int64>>) Sum(IEnumerable<Nullable<Int64>>)

计算可以为 null 的 Int64 值序列的总和。Computes the sum of a sequence of nullable Int64 values.

Sum(IEnumerable<Single>) Sum(IEnumerable<Single>) Sum(IEnumerable<Single>) Sum(IEnumerable<Single>)

计算 Single 值序列的总和。Computes the sum of a sequence of Single values.

Sum(IEnumerable<Nullable<Double>>) Sum(IEnumerable<Nullable<Double>>) Sum(IEnumerable<Nullable<Double>>) Sum(IEnumerable<Nullable<Double>>)

计算可以为 null 的 Double 值序列的总和。Computes the sum of a sequence of nullable Double values.

Sum(IEnumerable<Int32>) Sum(IEnumerable<Int32>) Sum(IEnumerable<Int32>) Sum(IEnumerable<Int32>)

计算 Int32 值序列的总和。Computes the sum of a sequence of Int32 values.

Sum(IEnumerable<Int64>) Sum(IEnumerable<Int64>) Sum(IEnumerable<Int64>) Sum(IEnumerable<Int64>)

计算 Int64 值序列的总和。Computes the sum of a sequence of Int64 values.

Sum(IEnumerable<Double>) Sum(IEnumerable<Double>) Sum(IEnumerable<Double>) Sum(IEnumerable<Double>)

计算 Double 值序列的总和。Computes the sum of a sequence of Double values.

Sum(IEnumerable<Decimal>) Sum(IEnumerable<Decimal>) Sum(IEnumerable<Decimal>) Sum(IEnumerable<Decimal>)

计算 Decimal 值序列的总和。Computes the sum of a sequence of Decimal values.

Sum(IEnumerable<Nullable<Decimal>>) Sum(IEnumerable<Nullable<Decimal>>) Sum(IEnumerable<Nullable<Decimal>>) Sum(IEnumerable<Nullable<Decimal>>)

计算可以为 null 的 Decimal 值序列的总和。Computes the sum of a sequence of nullable Decimal values.

Sum<TSource>(IEnumerable<TSource>, Func<TSource,Single>) Sum<TSource>(IEnumerable<TSource>, Func<TSource,Single>) Sum<TSource>(IEnumerable<TSource>, Func<TSource,Single>) Sum<TSource>(IEnumerable<TSource>, Func<TSource,Single>)

计算 Single 值序列的总和,这些值可通过对输入序列中的每个元素调用转换函数获得。Computes the sum of the sequence of Single values that are obtained by invoking a transform function on each element of the input sequence.

Sum<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Single>>) Sum<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Single>>) Sum<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Single>>) Sum<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Single>>)

计算可以为 null 的 Single 值序列的总和,这些值可通过对输入序列的每个元素调用转换函数获得。Computes the sum of the sequence of nullable Single values that are obtained by invoking a transform function on each element of the input sequence.

Sum<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int64>>) Sum<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int64>>) Sum<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int64>>) Sum<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int64>>)

计算可以为 null 的 Int64 值序列的总和,这些值可通过对输入序列的每个元素调用转换函数获得。Computes the sum of the sequence of nullable Int64 values that are obtained by invoking a transform function on each element of the input sequence.

Sum<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int32>>) Sum<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int32>>) Sum<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int32>>) Sum<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int32>>)

计算可以为 null 的 Int32 值序列的总和,这些值可通过对输入序列的每个元素调用转换函数获得。Computes the sum of the sequence of nullable Int32 values that are obtained by invoking a transform function on each element of the input sequence.

Sum<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Double>>) Sum<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Double>>) Sum<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Double>>) Sum<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Double>>)

计算可以为 null 的 Double 值序列的总和,这些值可通过对输入序列的每个元素调用转换函数获得。Computes the sum of the sequence of nullable Double values that are obtained by invoking a transform function on each element of the input sequence.

Sum<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Decimal>>) Sum<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Decimal>>) Sum<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Decimal>>) Sum<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Decimal>>)

计算可以为 null 的 Decimal 值序列的总和,这些值可通过对输入序列的每个元素调用转换函数获得。Computes the sum of the sequence of nullable Decimal values that are obtained by invoking a transform function on each element of the input sequence.

Sum<TSource>(IEnumerable<TSource>, Func<TSource,Int64>) Sum<TSource>(IEnumerable<TSource>, Func<TSource,Int64>) Sum<TSource>(IEnumerable<TSource>, Func<TSource,Int64>) Sum<TSource>(IEnumerable<TSource>, Func<TSource,Int64>)

计算 Int64 值序列的总和,这些值可通过对输入序列中的每个元素调用转换函数获得。Computes the sum of the sequence of Int64 values that are obtained by invoking a transform function on each element of the input sequence.

Sum<TSource>(IEnumerable<TSource>, Func<TSource,Int32>) Sum<TSource>(IEnumerable<TSource>, Func<TSource,Int32>) Sum<TSource>(IEnumerable<TSource>, Func<TSource,Int32>) Sum<TSource>(IEnumerable<TSource>, Func<TSource,Int32>)

计算 Int32 值序列的总和,这些值可通过对输入序列中的每个元素调用转换函数获得。Computes the sum of the sequence of Int32 values that are obtained by invoking a transform function on each element of the input sequence.

Sum<TSource>(IEnumerable<TSource>, Func<TSource,Double>) Sum<TSource>(IEnumerable<TSource>, Func<TSource,Double>) Sum<TSource>(IEnumerable<TSource>, Func<TSource,Double>) Sum<TSource>(IEnumerable<TSource>, Func<TSource,Double>)

计算 Double 值序列的总和,这些值可通过对输入序列中的每个元素调用转换函数获得。Computes the sum of the sequence of Double values that are obtained by invoking a transform function on each element of the input sequence.

Sum<TSource>(IEnumerable<TSource>, Func<TSource,Decimal>) Sum<TSource>(IEnumerable<TSource>, Func<TSource,Decimal>) Sum<TSource>(IEnumerable<TSource>, Func<TSource,Decimal>) Sum<TSource>(IEnumerable<TSource>, Func<TSource,Decimal>)

计算 Decimal 值序列的总和,这些值可通过对输入序列中的每个元素调用转换函数获得。Computes the sum of the sequence of Decimal values that are obtained by invoking a transform function on each element of the input sequence.

Take<TSource>(IEnumerable<TSource>, Int32) Take<TSource>(IEnumerable<TSource>, Int32) Take<TSource>(IEnumerable<TSource>, Int32) Take<TSource>(IEnumerable<TSource>, Int32)

从序列的开头返回指定数量的相邻元素。Returns a specified number of contiguous elements from the start of a sequence.

TakeLast<TSource>(IEnumerable<TSource>, Int32) TakeLast<TSource>(IEnumerable<TSource>, Int32) TakeLast<TSource>(IEnumerable<TSource>, Int32) TakeLast<TSource>(IEnumerable<TSource>, Int32)
TakeWhile<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) TakeWhile<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) TakeWhile<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) TakeWhile<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>)

只要指定的条件为 true,就会返回序列的元素。Returns elements from a sequence as long as a specified condition is true.

TakeWhile<TSource>(IEnumerable<TSource>, Func<TSource,Int32,Boolean>) TakeWhile<TSource>(IEnumerable<TSource>, Func<TSource,Int32,Boolean>) TakeWhile<TSource>(IEnumerable<TSource>, Func<TSource,Int32,Boolean>) TakeWhile<TSource>(IEnumerable<TSource>, Func<TSource,Int32,Boolean>)

只要指定的条件为 true,就会返回序列的元素。Returns elements from a sequence as long as a specified condition is true. 将在谓词函数的逻辑中使用元素的索引。The element's index is used in the logic of the predicate function.

ThenBy<TSource,TKey>(IOrderedEnumerable<TSource>, Func<TSource,TKey>, IComparer<TKey>) ThenBy<TSource,TKey>(IOrderedEnumerable<TSource>, Func<TSource,TKey>, IComparer<TKey>) ThenBy<TSource,TKey>(IOrderedEnumerable<TSource>, Func<TSource,TKey>, IComparer<TKey>) ThenBy<TSource,TKey>(IOrderedEnumerable<TSource>, Func<TSource,TKey>, IComparer<TKey>)

使用指定的比较器按升序对序列中的元素执行后续排序。Performs a subsequent ordering of the elements in a sequence in ascending order by using a specified comparer.

ThenBy<TSource,TKey>(IOrderedEnumerable<TSource>, Func<TSource,TKey>) ThenBy<TSource,TKey>(IOrderedEnumerable<TSource>, Func<TSource,TKey>) ThenBy<TSource,TKey>(IOrderedEnumerable<TSource>, Func<TSource,TKey>) ThenBy<TSource,TKey>(IOrderedEnumerable<TSource>, Func<TSource,TKey>)

根据某个键按升序对序列中的元素执行后续排序。Performs a subsequent ordering of the elements in a sequence in ascending order according to a key.

ThenByDescending<TSource,TKey>(IOrderedEnumerable<TSource>, Func<TSource,TKey>) ThenByDescending<TSource,TKey>(IOrderedEnumerable<TSource>, Func<TSource,TKey>) ThenByDescending<TSource,TKey>(IOrderedEnumerable<TSource>, Func<TSource,TKey>) ThenByDescending<TSource,TKey>(IOrderedEnumerable<TSource>, Func<TSource,TKey>)

根据某个键按降序对序列中的元素执行后续排序。Performs a subsequent ordering of the elements in a sequence in descending order, according to a key.

ThenByDescending<TSource,TKey>(IOrderedEnumerable<TSource>, Func<TSource,TKey>, IComparer<TKey>) ThenByDescending<TSource,TKey>(IOrderedEnumerable<TSource>, Func<TSource,TKey>, IComparer<TKey>) ThenByDescending<TSource,TKey>(IOrderedEnumerable<TSource>, Func<TSource,TKey>, IComparer<TKey>) ThenByDescending<TSource,TKey>(IOrderedEnumerable<TSource>, Func<TSource,TKey>, IComparer<TKey>)

使用指定的比较器按降序对序列中的元素执行后续排序。Performs a subsequent ordering of the elements in a sequence in descending order by using a specified comparer.

ToArray<TSource>(IEnumerable<TSource>) ToArray<TSource>(IEnumerable<TSource>) ToArray<TSource>(IEnumerable<TSource>) ToArray<TSource>(IEnumerable<TSource>)

IEnumerable<T> 中创建数组。Creates an array from a IEnumerable<T>.

ToDictionary<TSource,TKey,TElement>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>) ToDictionary<TSource,TKey,TElement>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>) ToDictionary<TSource,TKey,TElement>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>) ToDictionary<TSource,TKey,TElement>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>)

根据指定的键选择器和元素选择器函数,从 IEnumerable<T> 创建一个 Dictionary<TKey,TValue>Creates a Dictionary<TKey,TValue> from an IEnumerable<T> according to specified key selector and element selector functions.

ToDictionary<TSource,TKey,TElement>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>, IEqualityComparer<TKey>) ToDictionary<TSource,TKey,TElement>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>, IEqualityComparer<TKey>) ToDictionary<TSource,TKey,TElement>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>, IEqualityComparer<TKey>) ToDictionary<TSource,TKey,TElement>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>, IEqualityComparer<TKey>)

根据指定的键选择器函数、比较器和元素选择器函数,从 IEnumerable<T> 创建一个 Dictionary<TKey,TValue>Creates a Dictionary<TKey,TValue> from an IEnumerable<T> according to a specified key selector function, a comparer, and an element selector function.

ToDictionary<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>) ToDictionary<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>) ToDictionary<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>) ToDictionary<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>)

根据指定的键选择器函数,从 IEnumerable<T> 创建一个 Dictionary<TKey,TValue>Creates a Dictionary<TKey,TValue> from an IEnumerable<T> according to a specified key selector function.

ToDictionary<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IEqualityComparer<TKey>) ToDictionary<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IEqualityComparer<TKey>) ToDictionary<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IEqualityComparer<TKey>) ToDictionary<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IEqualityComparer<TKey>)

根据指定的键选择器函数和键比较器,从 IEnumerable<T> 创建一个 Dictionary<TKey,TValue>Creates a Dictionary<TKey,TValue> from an IEnumerable<T> according to a specified key selector function and key comparer.

ToHashSet<TSource>(IEnumerable<TSource>, IEqualityComparer<TSource>) ToHashSet<TSource>(IEnumerable<TSource>, IEqualityComparer<TSource>) ToHashSet<TSource>(IEnumerable<TSource>, IEqualityComparer<TSource>) ToHashSet<TSource>(IEnumerable<TSource>, IEqualityComparer<TSource>)

使用 comparer 通过 IEnumerable<T> 创建 HashSet<T>,以用于比较键Creates a HashSet<T> from an IEnumerable<T> using the comparer to compare keys

ToHashSet<TSource>(IEnumerable<TSource>) ToHashSet<TSource>(IEnumerable<TSource>) ToHashSet<TSource>(IEnumerable<TSource>) ToHashSet<TSource>(IEnumerable<TSource>)

IEnumerable<T> 创建一个 HashSet<T>Creates a HashSet<T> from an IEnumerable<T>.

ToList<TSource>(IEnumerable<TSource>) ToList<TSource>(IEnumerable<TSource>) ToList<TSource>(IEnumerable<TSource>) ToList<TSource>(IEnumerable<TSource>)

IEnumerable<T> 创建一个 List<T>Creates a List<T> from an IEnumerable<T>.

ToLookup<TSource,TKey,TElement>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>) ToLookup<TSource,TKey,TElement>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>) ToLookup<TSource,TKey,TElement>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>) ToLookup<TSource,TKey,TElement>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>)

根据指定的键选择器和元素选择器函数,从 IEnumerable<T> 创建一个 Lookup<TKey,TElement>Creates a Lookup<TKey,TElement> from an IEnumerable<T> according to specified key selector and element selector functions.

ToLookup<TSource,TKey,TElement>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>, IEqualityComparer<TKey>) ToLookup<TSource,TKey,TElement>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>, IEqualityComparer<TKey>) ToLookup<TSource,TKey,TElement>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>, IEqualityComparer<TKey>) ToLookup<TSource,TKey,TElement>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>, IEqualityComparer<TKey>)

根据指定的键选择器函数、比较器和元素选择器函数,从 IEnumerable<T> 创建一个 Lookup<TKey,TElement>Creates a Lookup<TKey,TElement> from an IEnumerable<T> according to a specified key selector function, a comparer and an element selector function.

ToLookup<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>) ToLookup<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>) ToLookup<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>) ToLookup<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>)

根据指定的键选择器函数,从 IEnumerable<T> 创建一个 Lookup<TKey,TElement>Creates a Lookup<TKey,TElement> from an IEnumerable<T> according to a specified key selector function.

ToLookup<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IEqualityComparer<TKey>) ToLookup<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IEqualityComparer<TKey>) ToLookup<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IEqualityComparer<TKey>) ToLookup<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IEqualityComparer<TKey>)

根据指定的键选择器函数和键比较器,从 IEnumerable<T> 创建一个 Lookup<TKey,TElement>Creates a Lookup<TKey,TElement> from an IEnumerable<T> according to a specified key selector function and key comparer.

Union<TSource>(IEnumerable<TSource>, IEnumerable<TSource>) Union<TSource>(IEnumerable<TSource>, IEnumerable<TSource>) Union<TSource>(IEnumerable<TSource>, IEnumerable<TSource>) Union<TSource>(IEnumerable<TSource>, IEnumerable<TSource>)

通过使用默认的相等比较器,生成两个序列的并集。Produces the set union of two sequences by using the default equality comparer.

Union<TSource>(IEnumerable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>) Union<TSource>(IEnumerable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>) Union<TSource>(IEnumerable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>) Union<TSource>(IEnumerable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>)

通过使用指定的 IEqualityComparer<T> 生成两个序列的并集。Produces the set union of two sequences by using a specified IEqualityComparer<T>.

Where<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) Where<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) Where<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) Where<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>)

基于谓词筛选值序列。Filters a sequence of values based on a predicate.

Where<TSource>(IEnumerable<TSource>, Func<TSource,Int32,Boolean>) Where<TSource>(IEnumerable<TSource>, Func<TSource,Int32,Boolean>) Where<TSource>(IEnumerable<TSource>, Func<TSource,Int32,Boolean>) Where<TSource>(IEnumerable<TSource>, Func<TSource,Int32,Boolean>)

基于谓词筛选值序列。Filters a sequence of values based on a predicate. 将在谓词函数的逻辑中使用每个元素的索引。Each element's index is used in the logic of the predicate function.

Zip<TFirst,TSecond,TResult>(IEnumerable<TFirst>, IEnumerable<TSecond>, Func<TFirst,TSecond,TResult>) Zip<TFirst,TSecond,TResult>(IEnumerable<TFirst>, IEnumerable<TSecond>, Func<TFirst,TSecond,TResult>) Zip<TFirst,TSecond,TResult>(IEnumerable<TFirst>, IEnumerable<TSecond>, Func<TFirst,TSecond,TResult>) Zip<TFirst,TSecond,TResult>(IEnumerable<TFirst>, IEnumerable<TSecond>, Func<TFirst,TSecond,TResult>)

将指定函数应用于两个序列的对应元素,以生成结果序列。Applies a specified function to the corresponding elements of two sequences, producing a sequence of the results.

Zip<TFirst,TSecond>(IEnumerable<TFirst>, IEnumerable<TSecond>) Zip<TFirst,TSecond>(IEnumerable<TFirst>, IEnumerable<TSecond>) Zip<TFirst,TSecond>(IEnumerable<TFirst>, IEnumerable<TSecond>) Zip<TFirst,TSecond>(IEnumerable<TFirst>, IEnumerable<TSecond>)

使用两个指定序列中的元素生成元组序列。Produces a sequence of tuples with elements from the two specified sequences.

适用于

另请参阅