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

定义

返回由泛型参数指定的类型的默认排序顺序比较器。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)

属性值

继承 Comparer<T> 并作为 T 类型的排序顺序比较器的对象。An object that inherits Comparer<T> and serves as a sort order comparer for type T.

示例

下面的示例演示如何使用Default属性来获取执行默认的比较的对象。The following example shows how to use the Default property to get an object that performs the default comparison. 此示例摘自一个更大的示例为提供Comparer<T>类。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

注解

Comparer<T>此属性返回使用System.IComparable<T>泛型接口 (IComparable<T>在 C# 中,IComparable(Of T)在 Visual Basic 中) 来比较两个对象。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. 如果类型T不实现System.IComparable<T>泛型接口,此属性将返回Comparer<T>,它使用System.IComparable接口。If type T does not implement the System.IComparable<T> generic interface, this property returns a Comparer<T> that uses the System.IComparable interface.

调用方说明

对于字符串比较,StringComparer建议类比较器<字符串> (比较器 (Of String)在 Visual Basic 中)。For string comparisons, the StringComparer class is recommended over Comparer<String> (Comparer(Of String) in Visual Basic). 属性的StringComparer类返回使用区分区域性和区分大小写的不同组合进行字符串比较的预定义的实例。Properties of the StringComparer class return predefined instances that perform string comparisons with different combinations of culture-sensitivity and case-sensitivity. 区分大小写和区分区域性都是一致的相同成员StringComparer实例。The case-sensitivity and culture-sensitivity are consistent among the members of the same StringComparer instance.

有关特定于区域性的比较的详细信息,请参阅System.Globalization命名空间和全球化和本地化For more information on culture-specific comparisons, see the System.Globalization namespace and Globalization and Localization.

适用于

另请参阅