UriTemplateEquivalenceComparer Class
A class used to compare UriTemplate instances for structural (instead of reference) equivalence.
Assembly: System.ServiceModel (in System.ServiceModel.dll)
The UriTemplateEquivalenceComparer type exposes the following members.
| Name | Description | |
|---|---|---|
![]() | UriTemplateEquivalenceComparer | Initializes a new instance of the UriTemplateEquivalenceComparer class. |
| Name | Description | |
|---|---|---|
![]() | Equals(Object) | Determines whether the specified Object is equal to the current Object. (Inherited from Object.) |
![]() | Equals(UriTemplate, UriTemplate) | Compares two UriTemplate instances for equivalence. |
![]() | Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.) |
![]() | GetHashCode | Serves as a hash function for a particular type. (Inherited from Object.) |
![]() | GetHashCode(UriTemplate) | Gets a hash code for the specified UriTemplate instance. |
![]() | GetType | Gets the Type of the current instance. (Inherited from Object.) |
![]() | MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
![]() | ToString | Returns a string that represents the current object. (Inherited from Object.) |
UriTemplate instances are compared using reference equality by default. The UriTemplateEquivalenceComparer class evaluates equivalence using IsEquivalentTo(UriTemplate) instead of the default reference equality check. This class is useful when you wish to compare two UriTemplate instances based on the URIs they match instead of strict reference equality.
The following example shows the difference between reference equality and structural equality. It also shows how to use the UriTemplateEquivalenceComparer as a comparer in a dictionary.
'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
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

