Comparer<T>.Default Comparer<T>.Default Comparer<T>.Default Comparer<T>.Default Property

定義

傳回泛型引數指定之型別的預設排序次序比較子 (Comparer)。Returns a default sort order comparer for the type specified by the generic argument.

public:
 static property System::Collections::Generic::Comparer<T> ^ Default { System::Collections::Generic::Comparer<T> ^ get(); };
public static System.Collections.Generic.Comparer<T> Default { get; }
member this.Default : System.Collections.Generic.Comparer<'T>
Public Shared ReadOnly Property Default As Comparer(Of T)

屬性值

物件,繼承 Comparer<T>,並用做型別 T 的排序次序比較子。An object that inherits Comparer<T> and serves as a sort order comparer for type T.

範例

下列範例示範如何使用Default屬性來取得執行預設的比較的物件。The following example shows how to use the Default property to get an object that performs the default comparison. 這個範例是針對提供之較大範例的一部分Comparer<T>類別。This example is part of a larger example provided for the Comparer<T> class.

// Get the default comparer that 
// sorts first by the height.
Comparer<Box> defComp = Comparer<Box>.Default;

// Calling Boxes.Sort() with no parameter
// is the same as calling Boxs.Sort(defComp)
// because they are both using the default comparer.
Boxes.Sort();

foreach (Box bx in Boxes)
{
    Console.WriteLine("{0}\t{1}\t{2}",
        bx.Height.ToString(), bx.Length.ToString(), 
        bx.Width.ToString());
}
' Get the default comparer that 
' sorts first by the height.
Dim defComp As Comparer(Of Box) = Comparer(Of Box).Default

' Calling Boxes.Sort() with no parameter
' is the same as calling Boxs.Sort(defComp)
' because they are both using the default comparer.
Boxes.Sort()

For Each bx As Box In Boxes
          Console.WriteLine("{0}" & vbTab & "{1}" & vbTab & "{2}", _
                            bx.Height.ToString(), _
                            bx.Length.ToString(), _
                            bx.Width.ToString())
Next bx

備註

Comparer<T>傳回此屬性會使用System.IComparable<T>泛型介面 (IComparable<T>在 C# 中, IComparable(Of T) Visual Basic 中) 來比較兩個物件。The Comparer<T> returned by this property uses the System.IComparable<T> generic interface (IComparable<T> in C#, IComparable(Of T) in Visual Basic) to compare two objects. 如果型別T不會實作System.IComparable<T>泛型介面,這個屬性會傳回Comparer<T>使用System.IComparable介面。If type T does not implement the System.IComparable<T> generic interface, this property returns a Comparer<T> that uses the System.IComparable interface.

給呼叫者的注意事項

字串比較StringComparer建議類別比較子<字串> (比較子 (Of String) Visual Basic 中)。For string comparisons, the StringComparer class is recommended over Comparer<String> (Comparer(Of String) in Visual Basic). 屬性的StringComparer類別傳回預先定義的執行個體執行的不同組合的區分文化特性和區分大小寫的字串比較。Properties of the StringComparer class return predefined instances that perform string comparisons with different combinations of culture-sensitivity and case-sensitivity. 區分大小寫和區分文化特性都是一致的相同成員之間StringComparer執行個體。The case-sensitivity and culture-sensitivity are consistent among the members of the same StringComparer instance.

如需有關特定文化特性比較的詳細資訊,請參閱 <<c0> System.Globalization 命名空間並全球化和當地語系化For more information on culture-specific comparisons, see the System.Globalization namespace and Globalization and Localization.

適用於

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