Queryable.OrderBy Queryable.OrderBy Queryable.OrderBy Queryable.OrderBy Method

定義

シーケンスの要素を昇順に並べ替えます。Sorts the elements of a sequence in ascending order.

オーバーロード

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

指定された比較子を使用してシーケンスの要素を昇順に並べ替えます。Sorts the elements of a sequence in ascending order by using a specified comparer.

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

シーケンスの要素をキーに従って昇順に並べ替えます。Sorts the elements of a sequence in ascending order according to a key.

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

指定された比較子を使用してシーケンスの要素を昇順に並べ替えます。Sorts the elements of a sequence in ascending order by using a specified comparer.

public:
generic <typename TSource, typename TKey>
[System::Runtime::CompilerServices::Extension]
 static System::Linq::IOrderedQueryable<TSource> ^ OrderBy(System::Linq::IQueryable<TSource> ^ source, System::Linq::Expressions::Expression<Func<TSource, TKey> ^> ^ keySelector, System::Collections::Generic::IComparer<TKey> ^ comparer);
public static System.Linq.IOrderedQueryable<TSource> OrderBy<TSource,TKey> (this System.Linq.IQueryable<TSource> source, System.Linq.Expressions.Expression<Func<TSource,TKey>> keySelector, System.Collections.Generic.IComparer<TKey> comparer);
static member OrderBy : System.Linq.IQueryable<'Source> * System.Linq.Expressions.Expression<Func<'Source, 'Key>> * System.Collections.Generic.IComparer<'Key> -> System.Linq.IOrderedQueryable<'Source>
<Extension()>
Public Function OrderBy(Of TSource, TKey) (source As IQueryable(Of TSource), keySelector As Expression(Of Func(Of TSource, TKey)), comparer As IComparer(Of TKey)) As IOrderedQueryable(Of TSource)

型パラメーター

TSource

source の要素の型。The type of the elements of source.

TKey

keySelector で表される関数によって返されるキーの型。The type of the key returned by the function that is represented by keySelector.

パラメーター

source
IQueryable<TSource>

順序付ける値のシーケンス。A sequence of values to order.

keySelector
Expression<Func<TSource,TKey>>

要素からキーを抽出する関数。A function to extract a key from an element.

comparer
IComparer<TKey>

キーを比較する IComparer<T>An IComparer<T> to compare keys.

戻り値

要素がキーに従って並べ替えられている IOrderedQueryable<T>An IOrderedQueryable<T> whose elements are sorted according to a key.

例外

sourcekeySelector、または comparer は、null です。source or keySelector or comparer is null.

注釈

このメソッドには、型引数が型Expression<TDelegate>の1つ以上の型のFunc<T,TResult>パラメーターが少なくとも1つ含まれています。This method has at least one parameter of type Expression<TDelegate> whose type argument is one of the Func<T,TResult> types. これらのパラメーターの場合は、ラムダ式を渡すことができ、にExpression<TDelegate>コンパイルされます。For these parameters, you can pass in a lambda expression and it will be compiled to an Expression<TDelegate>.

メソッドOrderBy<TSource,TKey>(IQueryable<TSource>, Expression<Func<TSource,TKey>>, IComparer<TKey>)は、構築MethodCallExpressionされたOrderBy<TSource,TKey>(IQueryable<TSource>, Expression<Func<TSource,TKey>>, IComparer<TKey>)ジェネリックメソッドとして呼び出し元を表すを生成します。The OrderBy<TSource,TKey>(IQueryable<TSource>, Expression<Func<TSource,TKey>>, IComparer<TKey>) method generates a MethodCallExpression that represents calling OrderBy<TSource,TKey>(IQueryable<TSource>, Expression<Func<TSource,TKey>>, IComparer<TKey>) itself as a constructed generic method. MethodCallExpressionに、 IQueryProvider CreateQuery<TElement>(Expression) パラメーターsourceProviderプロパティによって表されるのメソッドにを渡します。It then passes the MethodCallExpression to the CreateQuery<TElement>(Expression) method of the IQueryProvider represented by the Provider property of the source parameter. を呼び出しCreateQuery<TElement>(Expression)た結果が型IOrderedQueryable<T>にキャストされ、が返されます。The result of calling CreateQuery<TElement>(Expression) is cast to type IOrderedQueryable<T> and returned.

呼び出しOrderBy<TSource,TKey>(IQueryable<TSource>, Expression<Func<TSource,TKey>>, IComparer<TKey>)を表す式ツリーを実行した結果として発生するクエリ動作は、 sourceパラメーターの型の実装によって異なります。The query behavior that occurs as a result of executing an expression tree that represents calling OrderBy<TSource,TKey>(IQueryable<TSource>, Expression<Func<TSource,TKey>>, IComparer<TKey>) depends on the implementation of the type of the source parameter. 期待される動作は、のsource source各要素に対してを呼び出すkeySelectorことによって取得したキーに基づいて、の要素を並べ替えることです。The expected behavior is that it sorts the elements of source based on the key obtained by invoking keySelector on each element of source. パラメーター comparerは、キーの比較に使用されます。The comparer parameter is used to compare keys.

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

シーケンスの要素をキーに従って昇順に並べ替えます。Sorts the elements of a sequence in ascending order according to a key.

public:
generic <typename TSource, typename TKey>
[System::Runtime::CompilerServices::Extension]
 static System::Linq::IOrderedQueryable<TSource> ^ OrderBy(System::Linq::IQueryable<TSource> ^ source, System::Linq::Expressions::Expression<Func<TSource, TKey> ^> ^ keySelector);
public static System.Linq.IOrderedQueryable<TSource> OrderBy<TSource,TKey> (this System.Linq.IQueryable<TSource> source, System.Linq.Expressions.Expression<Func<TSource,TKey>> keySelector);
static member OrderBy : System.Linq.IQueryable<'Source> * System.Linq.Expressions.Expression<Func<'Source, 'Key>> -> System.Linq.IOrderedQueryable<'Source>
<Extension()>
Public Function OrderBy(Of TSource, TKey) (source As IQueryable(Of TSource), keySelector As Expression(Of Func(Of TSource, TKey))) As IOrderedQueryable(Of TSource)

型パラメーター

TSource

source の要素の型。The type of the elements of source.

TKey

keySelector で表される関数によって返されるキーの型。The type of the key returned by the function that is represented by keySelector.

パラメーター

source
IQueryable<TSource>

順序付ける値のシーケンス。A sequence of values to order.

keySelector
Expression<Func<TSource,TKey>>

要素からキーを抽出する関数。A function to extract a key from an element.

戻り値

要素がキーに従って並べ替えられている IOrderedQueryable<T>An IOrderedQueryable<T> whose elements are sorted according to a key.

例外

source または keySelectornull です。source or keySelector is null.

次のコード例は、を使用OrderBy<TSource,TKey>(IQueryable<TSource>, Expression<Func<TSource,TKey>>)してシーケンスの要素を並べ替える方法を示しています。The following code example demonstrates how to use OrderBy<TSource,TKey>(IQueryable<TSource>, Expression<Func<TSource,TKey>>) to sort the elements of a sequence.

class Pet
{
    public string Name { get; set; }
    public int Age { get; set; }
}

public static void OrderByEx1()
{
    Pet[] pets = { new Pet { Name="Barley", Age=8 },
                   new Pet { Name="Boots", Age=4 },
                   new Pet { Name="Whiskers", Age=1 } };

    // Sort the Pet objects in the array by Pet.Age.
    IEnumerable<Pet> query =
        pets.AsQueryable().OrderBy(pet => pet.Age);

    foreach (Pet pet in query)
        Console.WriteLine("{0} - {1}", pet.Name, pet.Age);
}

/*
    This code produces the following output:

    Whiskers - 1
    Boots - 4
    Barley - 8
*/

Structure Pet
    Public Name As String
    Public Age As Integer
End Structure

Shared Sub OrderByEx1()
    Dim pets() As Pet = {New Pet With {.Name = "Barley", .Age = 8}, _
                         New Pet With {.Name = "Boots", .Age = 4}, _
                         New Pet With {.Name = "Whiskers", .Age = 1}}

    ' Sort the Pet objects in the array by Pet.Age.
    Dim query As IEnumerable(Of Pet) = _
                pets.AsQueryable().OrderBy(Function(pet) pet.Age)

    Dim output As New System.Text.StringBuilder
    For Each pet As Pet In query
        output.AppendLine(String.Format("{0} - {1}", pet.Name, pet.Age))
    Next

    ' Display the output.
    MsgBox(output.ToString())
End Sub

' This code produces the following output:

' Whiskers - 1
' Boots - 4
' Barley - 8

注釈

このメソッドには、型引数が型Expression<TDelegate>の1つ以上の型のFunc<T,TResult>パラメーターが少なくとも1つ含まれています。This method has at least one parameter of type Expression<TDelegate> whose type argument is one of the Func<T,TResult> types. これらのパラメーターの場合は、ラムダ式を渡すことができ、にExpression<TDelegate>コンパイルされます。For these parameters, you can pass in a lambda expression and it will be compiled to an Expression<TDelegate>.

メソッドOrderBy<TSource,TKey>(IQueryable<TSource>, Expression<Func<TSource,TKey>>)は、構築MethodCallExpressionされたOrderBy<TSource,TKey>(IQueryable<TSource>, Expression<Func<TSource,TKey>>)ジェネリックメソッドとして呼び出し元を表すを生成します。The OrderBy<TSource,TKey>(IQueryable<TSource>, Expression<Func<TSource,TKey>>) method generates a MethodCallExpression that represents calling OrderBy<TSource,TKey>(IQueryable<TSource>, Expression<Func<TSource,TKey>>) itself as a constructed generic method. MethodCallExpressionに、 IQueryProvider CreateQuery<TElement>(Expression) パラメーターsourceProviderプロパティによって表されるのメソッドにを渡します。It then passes the MethodCallExpression to the CreateQuery<TElement>(Expression) method of the IQueryProvider represented by the Provider property of the source parameter. を呼び出しCreateQuery<TElement>(Expression)た結果が型IOrderedQueryable<T>にキャストされ、が返されます。The result of calling CreateQuery<TElement>(Expression) is cast to type IOrderedQueryable<T> and returned.

呼び出しOrderBy<TSource,TKey>(IQueryable<TSource>, Expression<Func<TSource,TKey>>)を表す式ツリーを実行した結果として発生するクエリ動作は、 sourceパラメーターの型の実装によって異なります。The query behavior that occurs as a result of executing an expression tree that represents calling OrderBy<TSource,TKey>(IQueryable<TSource>, Expression<Func<TSource,TKey>>) depends on the implementation of the type of the source parameter. 期待される動作は、のsource source各要素に対してを呼び出すkeySelectorことによって取得したキーに基づいて、の要素を並べ替えることです。The expected behavior is that it sorts the elements of source based on the key obtained by invoking keySelector on each element of source.

適用対象