Oid Class
Represents a cryptographic object identifier. This class cannot be inherited.
Assembly: System (in System.dll)
The Oid type exposes the following members.
| Name | Description | |
|---|---|---|
![]() | Oid | Initializes a new instance of the Oid class. |
![]() | Oid(Oid) | Initializes a new instance of the Oid class using the specified Oid object. |
![]() | Oid(String) | Initializes a new instance of the Oid class using a string value of an Oid object. |
![]() | Oid(String, String) | Initializes a new instance of the Oid class using the specified value and friendly name. |
| Name | Description | |
|---|---|---|
![]() | FriendlyName | Gets or sets the friendly name of the identifier. |
![]() | Value | Gets or sets the dotted number of the identifier. |
| Name | Description | |
|---|---|---|
![]() | Equals(Object) | Determines whether the specified Object is equal to the current Object. (Inherited from Object.) |
![]() | 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.) |
![]() | 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.) |
Cryptographic object identifiers consist of a value/name pair. If one property in a pair is set to a known value, the other property is updated automatically to a corresponding value. For example, if the Value property is set to "1.3.6.1.5.5.7.3.4", the FriendlyName property, which is localized, is set automatically to "Secure Email".
The following code example shows how to use the Oid class.
Imports System Imports System.Security.Cryptography Public Class OidSample Shared msg As String Public Shared Sub Main() ' Assign values to strings. Dim Value1 As String = "1.2.840.113549.1.1.1" Dim Name1 As String = "3DES" Dim Value2 As String = "1.3.6.1.4.1.311.20.2" Dim InvalidName As String = "This name is not a valid name" Dim InvalidValue As String = "1.1.1.1.1.1.1.1" ' Create new Oid objects using the specified values. ' Note that the corresponding Value or Friendly Name property is automatically added to the object. Dim o1 As New Oid(Value1) Dim o2 As New Oid(Name1) ' Create a new Oid object using the specified Value and Friendly Name properties. ' Note that the two are not compared to determine if the Value is associated ' with the Friendly Name. Dim o3 As New Oid(Value2, InvalidName) 'Create a new Oid object using the specified Value. Note that if the value ' is invalid or not known, no value is assigned to the Friendly Name property. Dim o4 As New Oid(InvalidValue) 'Write out the property information of the Oid objects. msg = "Oid1: Automatically assigned Friendly Name: " & o1.FriendlyName & ", " & o1.Value MsgBox(msg) 'Console.WriteLine("Oid1: Automatically assigned Friendly Name: {0}, {1}", o1.FriendlyName, o1.Value) 'Console.WriteLine("Oid2: Automatically assigned Value: {0}, {1}", o2.FriendlyName, o2.Value) msg = "Oid2: Automatically assigned Value: " & o2.FriendlyName & ", " & o2.Value MsgBox(msg) 'Console.WriteLine("Oid3: Name and Value not compared: {0}, {1}", o3.FriendlyName, o3.Value) msg = "Oid3: Name and Value not compared: " & o3.FriendlyName & ", " & o3.Value MsgBox(msg) ' Console.WriteLine("Oid4: Invalid Value used: {0}, {1} {2}", o4.FriendlyName, o4.Value, Environment.NewLine) msg = "Oid4: Invalid Value used: " & o4.FriendlyName & ", " & o4.Value MsgBox(msg) 'Create an Oid collection and add several Oid objects. Dim oc As New OidCollection() oc.Add(o1) oc.Add(o2) oc.Add(o3) ' Console.WriteLine("Number of Oids in the collection: {0}", oc.Count) ' Console.WriteLine("Is synchronized: {0} {1}", oc.IsSynchronized, Environment.NewLine) msg = "Number of Oids in the collection: " & oc.Count MsgBox(msg) msg = "Is synchronized: " & oc.IsSynchronized MsgBox(msg) 'Create an enumerator for moving through the collection. Dim oe As OidEnumerator = oc.GetEnumerator() 'You must execute a MoveNext() to get to the first item in the collection. oe.MoveNext() ' Write out Oids in the collection. 'Console.WriteLine("First Oid in collection: {0},{1}", oe.Current.FriendlyName, oe.Current.Value) msg = "First Oid in collection: " & oe.Current.FriendlyName & ", " & oe.Current.Value MsgBox(msg) oe.MoveNext() ' Console.WriteLine("Second Oid in collection: {0},{1}", oe.Current.FriendlyName, oe.Current.Value) msg = "Second Oid in collection: " & oe.Current.FriendlyName & ", " & oe.Current.Value MsgBox(msg) 'Return index in the collection to the beginning. oe.Reset() End Sub 'Main End Class 'OidSample
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, 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.


