共用方式為

Tuple<T1,T2> 類別

  • 參考

定義

命名空間:
System
組件:
System.Runtime.dll
組件:
mscorlib.dll
組件:
netstandard.dll

代表 2-Tuple 或雙重物件。

generic <typename T1, typename T2>
public ref class Tuple : IComparable, System::Collections::IStructuralComparable, System::Collections::IStructuralEquatable
generic <typename T1, typename T2>
public ref class Tuple : IComparable, System::Collections::IStructuralComparable, System::Collections::IStructuralEquatable, System::Runtime::CompilerServices::ITuple
public class Tuple<T1,T2> : IComparable, System.Collections.IStructuralComparable, System.Collections.IStructuralEquatable
public class Tuple<T1,T2> : IComparable, System.Collections.IStructuralComparable, System.Collections.IStructuralEquatable, System.Runtime.CompilerServices.ITuple
[System.Serializable]
public class Tuple<T1,T2> : IComparable, System.Collections.IStructuralComparable, System.Collections.IStructuralEquatable
type Tuple<'T1, 'T2> = class
    interface IStructuralComparable
    interface IStructuralEquatable
    interface IComparable
type Tuple<'T1, 'T2> = class
    interface IStructuralComparable
    interface IStructuralEquatable
    interface IComparable
    interface ITuple
[<System.Serializable>]
type Tuple<'T1, 'T2> = class
    interface IStructuralEquatable
    interface IStructuralComparable
    interface IComparable
[<System.Serializable>]
type Tuple<'T1, 'T2> = class
    interface IStructuralEquatable
    interface IStructuralComparable
    interface IComparable
    interface ITuple
Public Class Tuple(Of T1, T2)
Implements IComparable, IStructuralComparable, IStructuralEquatable
Public Class Tuple(Of T1, T2)
Implements IComparable, IStructuralComparable, IStructuralEquatable, ITuple

類型參數

T1

Tuple 第 1 個元件的型別。

T2

Tuple 第 2 個元件的型別。

繼承
Object
Tuple<T1,T2>
屬性
SerializableAttribute
實作
IStructuralComparable IStructuralEquatable IComparable ITuple

備註

Tuple 是具有特定數目和值序列的資料結構。 類別 Tuple<T1,T2> 代表 2 元組或配對，這是具有兩個元件的 Tuple。 2 元組類似于 KeyValuePair<TKey,TValue> 結構。

您可以呼叫建構函式或靜態 Tuple.Create<T1,T2>(T1, T2) 方法來 Tuple<T1,T2> 具現化 Tuple<T1,T2> 物件。 您可以使用唯讀 Item1 和 Item2 實例屬性來擷取 Tuple 元件的值。

Tuple 通常以四種不同的方式使用：

  • 表示單一資料集。 例如，Tuple 可以代表資料庫中的記錄，而其元件可以代表該記錄的欄位。

  • 若要提供資料集的輕鬆存取和操作。 下列範例會定義 物件的陣列 Tuple<T1,T2> ，其中包含學生名稱及其對應的測試分數。 然後逐一查看陣列以計算平均測試分數。

    using System;

public class Example
{
   public static void Main()
   {
      Tuple<string, Nullable<int>>[] scores = 
                    { new Tuple<string, Nullable<int>>("Jack", 78),
                      new Tuple<string, Nullable<int>>("Abbey", 92), 
                      new Tuple<string, Nullable<int>>("Dave", 88),
                      new Tuple<string, Nullable<int>>("Sam", 91), 
                      new Tuple<string, Nullable<int>>("Ed", null),
                      new Tuple<string, Nullable<int>>("Penelope", 82),
                      new Tuple<string, Nullable<int>>("Linda", 99),
                      new Tuple<string, Nullable<int>>("Judith", 84) };
      int number;
      double mean = ComputeMean(scores, out number);
      Console.WriteLine("Average test score: {0:N2} (n={1})", mean, number);
   }

   private static double ComputeMean(Tuple<string, Nullable<int>>[] scores, out int n) 
   {
      n = 0;      
      int sum = 0;
      foreach (var score in scores)
      {
         if (score.Item2.HasValue)
         { 
            n += 1;
            sum += score.Item2.Value;
         }
      }     
      if (n > 0)
         return sum / (double) n;
      else
         return 0;
   }
}
// The example displays the following output:
//       Average test score: 87.71 (n=7)

    open System

let scores = 
    [| Tuple<string, Nullable<int>>("Jack", 78)
       Tuple<string, Nullable<int>>("Abbey", 92) 
       Tuple<string, Nullable<int>>("Dave", 88)
       Tuple<string, Nullable<int>>("Sam", 91) 
       Tuple<string, Nullable<int>>("Ed", Nullable())
       Tuple<string, Nullable<int>>("Penelope", 82)
       Tuple<string, Nullable<int>>("Linda", 99)
       Tuple<string, Nullable<int>>("Judith", 84) |]

let computeMean (scores: Tuple<string, Nullable<int>>[]) (n: int outref) = 
    n <- 0      
    let mutable sum = 0
    for _, score in scores do
        if score.HasValue then
            n <- n + 1
            sum <- sum + score.Value
    if n > 0 then
        double sum / double n
    else
        0

let mutable number = 0
let mean = computeMean scores &number
printfn $"Average test score: {mean:N2} (n={number})"
// The example displays the following output:
//       Average test score: 87.71 (n=7)

    Module Example
   Public Sub Main()
      Dim scores() As Tuple(Of String, Nullable(Of Integer)) = 
                      { New Tuple(Of String, Nullable(Of Integer))("Jack", 78),
                        New Tuple(Of String, Nullable(Of Integer))("Abbey", 92), 
                        New Tuple(Of String, Nullable(Of Integer))("Dave", 88),
                        New Tuple(Of String, Nullable(Of Integer))("Sam", 91), 
                        New Tuple(Of String, Nullable(Of Integer))("Ed", Nothing),
                        New Tuple(Of String, Nullable(Of Integer))("Penelope", 82),
                        New Tuple(Of String, Nullable(Of Integer))("Linda", 99),
                        New Tuple(Of String, Nullable(Of Integer))("Judith", 84) }
      Dim number As Integer
      Dim mean As Double = ComputeMean(scores, number)
      Console.WriteLine("Average test score: {0:N2} (n={1})", mean, number)
   End Sub
   
   Private Function ComputeMean(scores() As Tuple(Of String, Nullable(Of Integer)), 
                                ByRef n As Integer) As Double
      n = 0      
      Dim sum As Integer
      For Each score In scores
         If score.Item2.HasValue Then 
            n += 1
            sum += score.Item2.Value
         End If
      Next     
      If n > 0 Then
         Return sum / n
      Else
         Return 0
      End If             
   End Function
End Module
' The example displays the following output:
'       Average test score: 87.71 (n=7)

  • 若要從方法傳回多個值，而不在 C#) 中使用 out 參數 (，或在 ByRef Visual Basic) 中傳回參數 (。 例如，下列範例會使用 Tuple<T1,T2> 物件傳回整數除法所產生的商數和餘數。

    using System;

public class Class1
{
   public static void Main()
   {
      int dividend, divisor;
      Tuple<int, int> result;
      
      dividend = 136945; divisor = 178;
      result = IntegerDivide(dividend, divisor);
      if (result != null)
         Console.WriteLine(@"{0} \ {1} = {2}, remainder {3}", 
                           dividend, divisor, result.Item1, result.Item2);
      else
         Console.WriteLine(@"{0} \ {1} = <Error>", dividend, divisor);
                        
      dividend = Int32.MaxValue; divisor = -2073;
      result = IntegerDivide(dividend, divisor);
      if (result != null)
         Console.WriteLine(@"{0} \ {1} = {2}, remainder {3}", 
                           dividend, divisor, result.Item1, result.Item2);
      else
         Console.WriteLine(@"{0} \ {1} = <Error>", dividend, divisor);
   }

   private static Tuple<int, int> IntegerDivide(int dividend, int divisor)
   {
      try {
         int remainder;
         int quotient = Math.DivRem(dividend, divisor, out remainder);
         return new Tuple<int, int>(quotient, remainder);
      }   
      catch (DivideByZeroException) {
         return null;
      }      
   }
}
// The example displays the following output:
//       136945 \ 178 = 769, remainder 63
//       2147483647 \ -2073 = -1035930, remainder 757

    open System

let integerDivide (dividend: int) divisor =
    try
        let quotient, remainder = Math.DivRem(dividend, divisor)
        Tuple<int, int>(quotient, remainder)
    with :? DivideByZeroException ->
        Unchecked.defaultof<Tuple<int, int>>

[<EntryPoint>]
let main _ =
    let dividend = 136945 
    let divisor = 178
    let result = integerDivide dividend divisor
    if box result <> null then
        printfn $@"{dividend} \ {divisor} = {result.Item1}, remainder {result.Item2}" 
    else
        printfn $@"{dividend} \ {divisor} = <Error>"
                    
    let dividend = Int32.MaxValue 
    let divisor = -2073
    let result = integerDivide dividend divisor
    if box result <> null then
        printfn $@"{dividend} \ {divisor} = {result.Item1}, remainder {result.Item2}" 
    else
        printfn $@"{dividend} \ {divisor} = <Error>"
    0
// The example displays the following output:
//       136945 \ 178 = 769, remainder 63
//       2147483647 \ -2073 = -1035930, remainder 757

    Module modMain
   Public Sub Main()
      Dim dividend, divisor As Integer
      Dim result As Tuple(Of Integer, Integer)
      
      dividend = 136945 : divisor = 178
      result = IntegerDivide(dividend, divisor)
      If result IsNot Nothing Then
         Console.WriteLine("{0} \ {1} = {2}, remainder {3}", 
                           dividend, divisor, result.Item1, result.Item2)
      Else
         Console.WriteLine("{0} \ {1} = <Error>", dividend, divisor)
      End If
                        
      dividend = Int32.MaxValue : divisor = -2073
      result = IntegerDivide(dividend, divisor)
      If result IsNot Nothing Then
         Console.WriteLine("{0} \ {1} = {2}, remainder {3}", 
                           dividend, divisor, result.Item1, result.Item2)
      Else
         Console.WriteLine("{0} \ {1} = <Error>", dividend, divisor)
      End If
   End Sub
   
   Private Function IntegerDivide(dividend As Integer, divisor As Integer) As Tuple(Of Integer, Integer)
      Try
         Dim remainder As Integer
         Dim quotient As Integer = Math.DivRem(dividend, divisor, remainder)
         Return New Tuple(Of Integer, Integer)(quotient, remainder)
      Catch e As DivideByZeroException
         Return Nothing
      End Try      
   End Function
End Module
' The example displays the following output:
'       136945 \ 178 = 769, remainder 63
'       2147483647 \ -2073 = -1035930, remainder 757

  • 透過單一參數將多個值傳遞至方法。 例如， Thread.Start(Object) 方法具有單一參數，可讓您將一個值提供給執行緒在啟動時執行的方法。 如果您提供 Tuple<T1,T2> 物件做為方法引數，則可以提供執行緒的啟動常式，其中包含兩個專案的資料。

建構函式

Tuple<T1,T2>(T1, T2)

初始化 Tuple<T1,T2> 類別的新執行個體。

屬性

Item1

取得目前 Tuple<T1,T2> 物件之第一個元件的值。
Item2

取得目前 Tuple<T1,T2> 物件之第二個元件的值。

方法

Equals(Object)

傳回值，這個值表示目前的 Tuple<T1,T2> 物件是否等於指定的物件。
GetHashCode()

傳回目前 Tuple<T1,T2> 物件的雜湊碼。
GetType()

取得目前執行個體的 Type。

(繼承來源 Object)
MemberwiseClone()

建立目前 Object 的淺層複製。

(繼承來源 Object)
ToString()

傳回字串，表示這個 Tuple<T1,T2> 執行個體的值。

明確介面實作

IComparable.CompareTo(Object)

將目前的 Tuple<T1,T2> 物件與指定的物件比較，並傳回可指出目前物件在排序次序中，是否在指定物件之前、之後或者相同之位置的整數。
IStructuralComparable.CompareTo(Object, IComparer)

使用指定的比較子將目前的 Tuple<T1,T2> 物件和指定的物件進行比較，並且傳回一個整數，表示目前的物件在排序順序中位於指定之物件的前面、後面還是相的位置。
IStructuralEquatable.Equals(Object, IEqualityComparer)

傳回值，這個值表示依據指定的比較方法，目前的 Tuple<T1,T2> 物件是否等於指定的物件。
IStructuralEquatable.GetHashCode(IEqualityComparer)

使用指定的計算方法，計算目前 Tuple<T1,T2> 物件的雜湊碼。
ITuple.Item[Int32]

取得指定的 Tuple 項目值。
ITuple.Length

取得 Tuple 中的項目數目。

擴充方法

Deconstruct<T1,T2>(Tuple<T1,T2>, T1, T2)

將具有 2 個元素的元組解構為不同的變數。
ToValueTuple<T1,T2>(Tuple<T1,T2>)

將 Tuple 類別的執行個體轉換為 ValueTuple 結構的執行個體。

適用於

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