UriTemplateEquivalenceComparer 類別

定義

命名空間:

System

組件:

System.ServiceModel.dll

用來針對結構 (而非參考) 等價比較 UriTemplate 執行個體的類別。

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)

繼承

Object

UriTemplateEquivalenceComparer

實作

IEqualityComparer<UriTemplate>

範例

下列範例會示範參考相等與結構相等之間的差異， 以及如何使用 UriTemplateEquivalenceComparer 做為字典中的比較子。

// 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

備註

根據預設，UriTemplate 執行個體會透過參考相等比較。 UriTemplateEquivalenceComparer 類別會使用 IsEquivalentTo(UriTemplate) 取代預設的參考相等檢查，以評估等價。 當您要根據相符的 URI 而非嚴格的參考相等來比較兩個 UriTemplate 執行個體時，這個類別就很有用。

建構函式

UriTemplateEquivalenceComparer()

初始化 UriTemplateEquivalenceComparer 類別的新執行個體。

方法

Equals(Object)	判斷指定的物件是否等於目前的物件。 (繼承來源 Object)
Equals(UriTemplate, UriTemplate)	比較兩個 UriTemplate 執行個體是否等價。
GetHashCode()	做為預設雜湊函式。 (繼承來源 Object)
GetHashCode(UriTemplate)	取得指定之 UriTemplate 執行個體的雜湊程式碼。
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()	傳回代表目前物件的字串。 (繼承來源 Object)