Queryable.SequenceEqual Queryable.SequenceEqual Queryable.SequenceEqual Queryable.SequenceEqual Method

定義

判斷兩個序列是否相等。Determines whether two sequences are equal.

多載

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

使用預設相等比較子來比較項目,以判斷兩個序列是否相等。Determines whether two sequences are equal by using the default equality comparer to compare elements.

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

使用指定的 IEqualityComparer<T> 來比較項目,以判斷兩個序列是否相等。Determines whether two sequences are equal by using a specified IEqualityComparer<T> to compare elements.

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

使用預設相等比較子來比較項目,以判斷兩個序列是否相等。Determines whether two sequences are equal by using the default equality comparer to compare elements.

public:
generic <typename TSource>
[System::Runtime::CompilerServices::Extension]
 static bool SequenceEqual(System::Linq::IQueryable<TSource> ^ source1, System::Collections::Generic::IEnumerable<TSource> ^ source2);
public static bool SequenceEqual<TSource> (this System.Linq.IQueryable<TSource> source1, System.Collections.Generic.IEnumerable<TSource> source2);
static member SequenceEqual : System.Linq.IQueryable<'Source> * seq<'Source> -> bool
<Extension()>
Public Function SequenceEqual(Of TSource) (source1 As IQueryable(Of TSource), source2 As IEnumerable(Of TSource)) As Boolean

類型參數

TSource

輸入序列之項目的類型。The type of the elements of the input sequences.

參數

source1
IQueryable<TSource>

IQueryable<T>,其項目要與 source2 的項目比較。An IQueryable<T> whose elements to compare to those of source2.

source2
IEnumerable<TSource>

IEnumerable<T>,其項目要與第一個序列的項目比較。An IEnumerable<T> whose elements to compare to those of the first sequence.

傳回

如果兩個來源序列的長度相同,而且其對應項目比較結果相同,則為 true,否則為 falsetrue if the two source sequences are of equal length and their corresponding elements compare equal; otherwise, false.

例外狀況

source1source2nullsource1 or source2 is null.

範例

下列程式碼範例示範如何使用SequenceEqual<TSource>(IQueryable<TSource>, IEnumerable<TSource>)判斷兩個序列是否相等。The following code example demonstrates how to use SequenceEqual<TSource>(IQueryable<TSource>, IEnumerable<TSource>) to determine whether two sequences are equal. 在此範例中, 序列是相等的。In this example the sequences are equal.

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

public static void SequenceEqualEx1()
{
    Pet pet1 = new Pet { Name = "Turbo", Age = 2 };
    Pet pet2 = new Pet { Name = "Peanut", Age = 8 };

    // Create two lists of pets.
    List<Pet> pets1 = new List<Pet> { pet1, pet2 };
    List<Pet> pets2 = new List<Pet> { pet1, pet2 };

    // Determine if the lists are equal.
    bool equal = pets1.AsQueryable().SequenceEqual(pets2);

    Console.WriteLine(
        "The lists {0} equal.",
        equal ? "are" : "are not");
}

/*
    This code produces the following output:

    The lists are equal.
*/

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

Shared Sub SequenceEqualEx1()
    Dim pet1 As New Pet With {.Name = "Turbo", .Age = 2}
    Dim pet2 As New Pet With {.Name = "Peanut", .Age = 8}

    ' Create two lists of pets.
    Dim pets1 As New List(Of Pet)(New Pet() {pet1, pet2})
    Dim pets2 As New List(Of Pet)(New Pet() {pet1, pet2})

    ' Determine if the lists are equal.
    Dim equal As Boolean = pets1.AsQueryable().SequenceEqual(pets2)

    ' Display the output.
    Dim text As String = IIf(equal, "are", "are not")
    MsgBox("The lists " & text & " equal.")
End Sub

'This code produces the following output:

'The lists are equal.

下列程式碼範例會比較兩個不相等的序列。The following code example compares two sequences that are not equal.

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

public static void SequenceEqualEx2()
{
    Pet pet1 = new Pet() { Name = "Turbo", Age = 2 };
    Pet pet2 = new Pet() { Name = "Peanut", Age = 8 };

    // Create two lists of pets.
    List<Pet> pets1 = new List<Pet> { pet1, pet2 };
    List<Pet> pets2 = new List<Pet> { 
        new Pet { Name = "Turbo", Age = 2 },
        new Pet { Name = "Peanut", Age = 8 } 
    };

    // Determine if the lists are equal.
    bool equal = pets1.AsQueryable().SequenceEqual(pets2);

    Console.WriteLine("The lists {0} equal.", equal ? "are" : "are NOT");
}

/*
    This code produces the following output:

    The lists are NOT equal.
*/

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

Shared Sub SequenceEqualEx2()
    Dim pet1 As New Pet With {.Name = "Turbo", .Age = 2}
    Dim pet2 As New Pet With {.Name = "Peanut", .Age = 8}

    ' Create two lists of pets.
    Dim pets1 As New List(Of Pet)()
    pets1.Add(pet1)
    pets1.Add(pet2)

    Dim pets2 As New List(Of Pet)()
    pets2.Add(New Pet With {.Name = "Turbo", .Age = 2})
    pets2.Add(New Pet With {.Name = "Peanut", .Age = 8})

    ' Determine if the lists are equal.
    Dim equal As Boolean = pets1.AsQueryable().SequenceEqual(pets2)

    ' Display the output.
    Dim text As String = IIf(equal, "are", "are not")
    MsgBox("The lists " & text & " equal.")
End Sub

' This code produces the following output:

' The lists are not equal.

備註

方法會產生, 其代表以SequenceEqual<TSource>(IQueryable<TSource>, IEnumerable<TSource>)結構化泛型方法的方式呼叫本身。 MethodCallExpression SequenceEqual<TSource>(IQueryable<TSource>, IEnumerable<TSource>)The SequenceEqual<TSource>(IQueryable<TSource>, IEnumerable<TSource>) method generates a MethodCallExpression that represents calling SequenceEqual<TSource>(IQueryable<TSource>, IEnumerable<TSource>) itself as a constructed generic method. 然後, 它會MethodCallExpression將傳遞Execute<TResult>(Expression)至由Provider source1參數IQueryProvider的屬性所表示之的方法。It then passes the MethodCallExpression to the Execute<TResult>(Expression) method of the IQueryProvider represented by the Provider property of the source1 parameter.

因執行代表呼叫SequenceEqual<TSource>(IQueryable<TSource>, IEnumerable<TSource>)之運算式樹狀架構而產生的查詢行為, 取決於source1參數類型的實作為。The query behavior that occurs as a result of executing an expression tree that represents calling SequenceEqual<TSource>(IQueryable<TSource>, IEnumerable<TSource>) depends on the implementation of the type of the source1 parameter. 預期的行為是它會判斷兩個來源序列是否相等。The expected behavior is that it determines if the two source sequences are equal.

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

使用指定的 IEqualityComparer<T> 來比較項目,以判斷兩個序列是否相等。Determines whether two sequences are equal by using a specified IEqualityComparer<T> to compare elements.

public:
generic <typename TSource>
[System::Runtime::CompilerServices::Extension]
 static bool SequenceEqual(System::Linq::IQueryable<TSource> ^ source1, System::Collections::Generic::IEnumerable<TSource> ^ source2, System::Collections::Generic::IEqualityComparer<TSource> ^ comparer);
public static bool SequenceEqual<TSource> (this System.Linq.IQueryable<TSource> source1, System.Collections.Generic.IEnumerable<TSource> source2, System.Collections.Generic.IEqualityComparer<TSource> comparer);
static member SequenceEqual : System.Linq.IQueryable<'Source> * seq<'Source> * System.Collections.Generic.IEqualityComparer<'Source> -> bool
<Extension()>
Public Function SequenceEqual(Of TSource) (source1 As IQueryable(Of TSource), source2 As IEnumerable(Of TSource), comparer As IEqualityComparer(Of TSource)) As Boolean

類型參數

TSource

輸入序列之項目的類型。The type of the elements of the input sequences.

參數

source1
IQueryable<TSource>

IQueryable<T>,其項目要與 source2 的項目比較。An IQueryable<T> whose elements to compare to those of source2.

source2
IEnumerable<TSource>

IEnumerable<T>,其項目要與第一個序列的項目比較。An IEnumerable<T> whose elements to compare to those of the first sequence.

comparer
IEqualityComparer<TSource>

用來比較項目的 IEqualityComparer<T>An IEqualityComparer<T> to use to compare elements.

傳回

如果兩個來源序列的長度相同,而且其對應項目比較結果相同,則為 true,否則為 falsetrue if the two source sequences are of equal length and their corresponding elements compare equal; otherwise, false.

例外狀況

source1source2nullsource1 or source2 is null.

備註

方法會產生, 其代表以SequenceEqual<TSource>(IQueryable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>)結構化泛型方法的方式呼叫本身。 MethodCallExpression SequenceEqual<TSource>(IQueryable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>)The SequenceEqual<TSource>(IQueryable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>) method generates a MethodCallExpression that represents calling SequenceEqual<TSource>(IQueryable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>) itself as a constructed generic method. 然後, 它會MethodCallExpression將傳遞Execute<TResult>(Expression)至由Provider source1參數IQueryProvider的屬性所表示之的方法。It then passes the MethodCallExpression to the Execute<TResult>(Expression) method of the IQueryProvider represented by the Provider property of the source1 parameter.

因執行代表呼叫SequenceEqual<TSource>(IQueryable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>)之運算式樹狀架構而產生的查詢行為, 取決於source1參數類型的實作為。The query behavior that occurs as a result of executing an expression tree that represents calling SequenceEqual<TSource>(IQueryable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>) depends on the implementation of the type of the source1 parameter. 預期的行為是, 它會使用comparer來比較元素, 判斷兩個來源序列是否相等。The expected behavior is that it determines if the two source sequences are equal by using comparer to compare elements.

適用於