UriTemplateEquivalenceComparer UriTemplateEquivalenceComparer UriTemplateEquivalenceComparer UriTemplateEquivalenceComparer Class

Definizione

Classe utilizzata per confrontare le istanze della classe UriTemplate allo scopo di verificarne l'equivalenza strutturale anziché di riferimento.A class used to compare UriTemplate instances for structural (instead of reference) equivalence.

public ref class UriTemplateEquivalenceComparer : System::Collections::Generic::IEqualityComparer<UriTemplate ^>
public class UriTemplateEquivalenceComparer : System.Collections.Generic.IEqualityComparer<UriTemplate>
type UriTemplateEquivalenceComparer = class
    interface IEqualityComparer<UriTemplate>
Public Class UriTemplateEquivalenceComparer
Implements IEqualityComparer(Of UriTemplate)
Ereditarietà
UriTemplateEquivalenceComparerUriTemplateEquivalenceComparerUriTemplateEquivalenceComparerUriTemplateEquivalenceComparer
Implementazioni

Esempi

Nell'esempio seguente viene illustrata la differenza tra uguaglianza di riferimento e uguaglianza strutturale.The following example shows the difference between reference equality and structural equality. Viene inoltre illustrato come utilizzare l'operatore di confronto UriTemplateEquivalenceComparer in un dizionario.It also shows how to use the UriTemplateEquivalenceComparer as a comparer in a dictionary.

// Define two structurally equivalent templates
UriTemplate temp1 = new UriTemplate("weather/{state}/{city}");
UriTemplate temp2 = new UriTemplate("weather/{country}/{village}");

// Notice they are not reference equal, in other words
// they are do not refer to the same object
if (temp1 == temp2)
    Console.WriteLine("{0} and {1} are reference equal", temp1, temp2);
else
    Console.WriteLine("{0} and {1} are NOT reference equal", temp1, temp2);

// Notice they are structrually equal
if (temp1.IsEquivalentTo(temp2))
    Console.WriteLine("{0} and {1} are structurally equal", temp1, temp2);
else
    Console.WriteLine("{0} and {1} are NOT structurally equal", temp1, temp2);

// Create a dictionary and use UriTemplateEquivalenceComparer as the comparer
Dictionary<UriTemplate, object> templates = new Dictionary<UriTemplate, object>(new UriTemplateEquivalenceComparer());

// Add template 1 into the dictionary
templates.Add(temp1, "template1");

// The UriTemplateEquivalenceComparer will be used here to compare the template in the table with template2
// they are structurally equivalent, so ContainsKey will return true.
if (templates.ContainsKey(temp2))
    Console.WriteLine("Both templates hash to the same value");
else
    Console.WriteLine("Both templates do NOT hash to the same value");
'Define two structurally equivalent templates
Dim temp1 As UriTemplate = New UriTemplate("weather/{state}/{city}")
Dim temp2 As UriTemplate = New UriTemplate("weather/{country}/{village}")

'Notice they are not reference equal, in other words
'they are do not refer to the same object
If temp1.Equals(temp2) Then
    Console.WriteLine("{0} and {1} are reference equal", temp1, temp2)
Else
    Console.WriteLine("{0} and {1} are NOT reference equal", temp1, temp2)
End If

'Notice they are structrually equal
If (temp1.IsEquivalentTo(temp2)) Then
    Console.WriteLine("{0} and {1} are structurally equal", temp1, temp2)
Else
    Console.WriteLine("{0} and {1} are NOT structurally equal", temp1, temp2)
End If

'Create a dictionary and use UriTemplateEquivalenceComparer as the comparer
Dim templates As Dictionary(Of UriTemplate, Object) = New Dictionary(Of UriTemplate, Object)(New UriTemplateEquivalenceComparer())

'Add template 1 into the dictionary
templates.Add(temp1, "template1")

'The UriTemplateEquivalenceComparer will be used here to compare the template in the table with template2
'they are structurally equivalent, so ContainsKey will return true.
If (templates.ContainsKey(temp2)) Then
    Console.WriteLine("Both templates hash to the same value")
Else
    Console.WriteLine("Both templates do NOT hash to the same value")
End If

Commenti

Per impostazione predefinita, le istanze della classe UriTemplate vengono confrontate utilizzando l'uguaglianza di riferimento.UriTemplate instances are compared using reference equality by default. La classe UriTemplateEquivalenceComparer verifica l'equivalenza utilizzando il metodo IsEquivalentTo(UriTemplate) anziché il controllo di uguaglianza di riferimento predefinito.The UriTemplateEquivalenceComparer class evaluates equivalence using IsEquivalentTo(UriTemplate) instead of the default reference equality check. Questa classe è utile quando si desidera confrontare due istanze della classe UriTemplate in base agli URI a cui corrispondono anziché in base all'uguaglianza di riferimento in senso stretto.This class is useful when you wish to compare two UriTemplate instances based on the URIs they match instead of strict reference equality.

Costruttori

UriTemplateEquivalenceComparer() UriTemplateEquivalenceComparer() UriTemplateEquivalenceComparer() UriTemplateEquivalenceComparer()

Inizializza una nuova istanza della classe UriTemplateEquivalenceComparer.Initializes a new instance of the UriTemplateEquivalenceComparer class.

Metodi

Equals(Object) Equals(Object) Equals(Object) Equals(Object)

Determina se l'oggetto specificato è uguale all'oggetto corrente.Determines whether the specified object is equal to the current object.

(Inherited from Object)
Equals(UriTemplate, UriTemplate) Equals(UriTemplate, UriTemplate) Equals(UriTemplate, UriTemplate) Equals(UriTemplate, UriTemplate)

Confronta due istanze della classe UriTemplate per determinare se sono equivalenti.Compares two UriTemplate instances for equivalence.

GetHashCode() GetHashCode() GetHashCode() GetHashCode()

Funge da funzione hash predefinita.Serves as the default hash function.

(Inherited from Object)
GetHashCode(UriTemplate) GetHashCode(UriTemplate) GetHashCode(UriTemplate) GetHashCode(UriTemplate)

Ottiene un codice hash per l'istanza specificata della classe UriTemplate.Gets a hash code for the specified UriTemplate instance.

GetType() GetType() GetType() GetType()

Ottiene l'oggetto Type dell'istanza corrente.Gets the Type of the current instance.

(Inherited from Object)
MemberwiseClone() MemberwiseClone() MemberwiseClone() MemberwiseClone()

Crea una copia superficiale dell'oggetto Object corrente.Creates a shallow copy of the current Object.

(Inherited from Object)
ToString() ToString() ToString() ToString()

Restituisce una stringa che rappresenta l'oggetto corrente.Returns a string that represents the current object.

(Inherited from Object)

Si applica a