ResourcePermissionBase ResourcePermissionBase ResourcePermissionBase ResourcePermissionBase Class

Definition

Allows control of code access security permissions.

public ref class ResourcePermissionBase abstract : System::Security::CodeAccessPermission, System::Security::Permissions::IUnrestrictedPermission
[System.Serializable]
public abstract class ResourcePermissionBase : System.Security.CodeAccessPermission, System.Security.Permissions.IUnrestrictedPermission
type ResourcePermissionBase = class
    inherit CodeAccessPermission
    interface IUnrestrictedPermission
Public MustInherit Class ResourcePermissionBase
Inherits CodeAccessPermission
Implements IUnrestrictedPermission
Inheritance
ResourcePermissionBaseResourcePermissionBaseResourcePermissionBaseResourcePermissionBase
Derived
Attributes
Implements

Examples

The following example inherits from the ResourcePermissionBase class. 4 kinds of constructors are implemented. The example also provides an implementation of a class called MailslotPermissionEntry. The PermissionAccessType property is then privately set to the type of MailslotPermissionEntry. The TagNames property is set privately to "Name" and "Machine".

#using <System.dll>

using namespace System;
using namespace System::Security::Permissions;
using namespace System::Collections;

[Flags]

public enum class MailslotPermissionAccess
{
   None = 0,
   Send = 1 << 1,
   Receive = 1 << 2 | MailslotPermissionAccess::Send
};


[Serializable]
public ref class MailslotPermissionEntry
{
private:
   String^ name;
   String^ machineName;
   MailslotPermissionAccess permissionAccess;

internal:
   MailslotPermissionEntry( ResourcePermissionBaseEntry^ baseEntry )
   {
      this->permissionAccess = (MailslotPermissionAccess)baseEntry->PermissionAccess;
      this->name = baseEntry->PermissionAccessPath[ 0 ]->ToString();
      this->machineName = baseEntry->PermissionAccessPath[ 1 ]->ToString();
   }

   ResourcePermissionBaseEntry^ GetBaseEntry()
   {
      array<String^>^newStrings = {this->Name,this->MachineName};
      ResourcePermissionBaseEntry^ baseEntry = gcnew ResourcePermissionBaseEntry( (int)(this->PermissionAccess),newStrings );
      return baseEntry;
   }

public:
   MailslotPermissionEntry( MailslotPermissionAccess permissionAccess, String^ name, String^ machineName )
   {
      this->permissionAccess = permissionAccess;
      this->name = name;
      this->machineName = machineName;
   }

   property String^ Name 
   {
      String^ get()
      {
         return this->name;
      }
   }

   property String^ MachineName 
   {
      String^ get()
      {
         return this->machineName;
      }
   }

   property MailslotPermissionAccess PermissionAccess 
   {
      MailslotPermissionAccess get()
      {
         return this->permissionAccess;
      }
   }
};


[Serializable]
public ref class MailslotPermission: public ResourcePermissionBase
{
private:
   ArrayList^ innerCollection;
   void SetNames()
   {
      this->PermissionAccessType = MailslotPermissionAccess::typeid;
      array<String^>^newStrings = {"Name","Machine"};
      this->TagNames = newStrings;
   }


internal:
   void AddPermissionAccess( MailslotPermissionEntry^ entry )
   {
      ResourcePermissionBase::AddPermissionAccess( entry->GetBaseEntry() );
   }

   void Clear()
   {
      ResourcePermissionBase::Clear();
   }

   void RemovePermissionAccess( MailslotPermissionEntry^ entry )
   {
      ResourcePermissionBase::RemovePermissionAccess( entry->GetBaseEntry() );
   }


public:
   MailslotPermission()
   {
      SetNames();
   }

   MailslotPermission( PermissionState state )
      : ResourcePermissionBase( state )
   {
      SetNames();
   }

   MailslotPermission( MailslotPermissionAccess permissionAccess, String^ name, String^ machineName )
   {
      SetNames();
      this->AddPermissionAccess( gcnew MailslotPermissionEntry( permissionAccess,name,machineName ) );
   }

   MailslotPermission( array<MailslotPermissionEntry^>^permissionAccessEntries )
   {
      SetNames();
      if ( permissionAccessEntries == nullptr )
            throw gcnew ArgumentNullException( "permissionAccessEntries" );

      for ( int index = 0; index < permissionAccessEntries->Length; ++index )
         this->AddPermissionAccess( permissionAccessEntries[ index ] );
   }

   property ArrayList^ PermissionEntries 
   {
      ArrayList^ get()
      {
         if ( this->innerCollection == nullptr )
                  this->innerCollection = gcnew ArrayList;

         this->innerCollection->InsertRange( 0, safe_cast<ICollection^>(ResourcePermissionBase::GetPermissionEntries()) );
         return this->innerCollection;
      }
   }
};
using System;        
using System.Security.Permissions;  
using System.Collections;

[Serializable()]
public class MailslotPermission: ResourcePermissionBase
{
 
	private ArrayList innerCollection;

	public MailslotPermission() 
	{
		SetNames();
	}                                                                

	public MailslotPermission(PermissionState state):base(state)
	{
		SetNames();
	}  

	public MailslotPermission(MailslotPermissionAccess permissionAccess, string name, string machineName)
	{
		SetNames();
		this.AddPermissionAccess(new MailslotPermissionEntry(permissionAccess, name, machineName));              
	}

	public MailslotPermission(MailslotPermissionEntry[] permissionAccessEntries) 
	{
		SetNames();
		if (permissionAccessEntries == null)
			throw new ArgumentNullException("permissionAccessEntries");
      
		for (int index = 0; index < permissionAccessEntries.Length; ++index)
			this.AddPermissionAccess(permissionAccessEntries[index]);                          
	}

	public ArrayList PermissionEntries 
	{
		get 
		{
			if (this.innerCollection == null)                     
				this.innerCollection = new ArrayList();
			this.innerCollection.InsertRange(0,base.GetPermissionEntries()); 

			return this.innerCollection;                                                               
		}
	}

	internal void AddPermissionAccess(MailslotPermissionEntry entry) 
	{
		base.AddPermissionAccess(entry.GetBaseEntry());
	}

	internal new void Clear() 
	{
		base.Clear();
	}

	internal void RemovePermissionAccess(MailslotPermissionEntry entry) 
	{
		base.RemovePermissionAccess(entry.GetBaseEntry());
	}

	private void SetNames() 
	{
		this.PermissionAccessType = typeof(MailslotPermissionAccess);
		this.TagNames = new string[]{"Name","Machine"};
	}                                
}

[Flags]         
public enum MailslotPermissionAccess 
{
	None = 0,
	Send = 1 << 1,
	Receive = 1 << 2 | Send,
} 

[Serializable()]     
public class MailslotPermissionEntry 
{
	private string name;
	private string machineName;
	private MailslotPermissionAccess permissionAccess;

	public MailslotPermissionEntry(MailslotPermissionAccess permissionAccess, string name, string machineName) 
	{
		this.permissionAccess = permissionAccess;
		this.name = name;
		this.machineName = machineName;
	}  

	internal MailslotPermissionEntry(ResourcePermissionBaseEntry baseEntry) 
	{
		this.permissionAccess = (MailslotPermissionAccess)baseEntry.PermissionAccess;
		this.name = baseEntry.PermissionAccessPath[0]; 
		this.machineName = baseEntry.PermissionAccessPath[1]; 
	}

	public string Name 
	{
		get 
		{                
			return this.name;                
		}                        
	}

	public string MachineName 
	{
		get 
		{                
			return this.machineName;                
		}                        
	}

	public MailslotPermissionAccess PermissionAccess 
	{
		get 
		{
			return this.permissionAccess;
		}                        
	}      

	internal ResourcePermissionBaseEntry GetBaseEntry() 
	{
		ResourcePermissionBaseEntry baseEntry = new ResourcePermissionBaseEntry((int)this.PermissionAccess, new string[] {this.Name,this.MachineName});            
		return baseEntry;
	}

}
Imports System
Imports System.Security.Permissions
Imports System.Collections

<Serializable()> Public Class MailslotPermission
    Inherits ResourcePermissionBase

    Private innerCollection As ArrayList


    Public Sub New()
        SetNames()
    End Sub 'New


    Public Sub New(ByVal state As PermissionState)
        MyBase.New(state)
        SetNames()
    End Sub 'New


    Public Sub New(ByVal permissionAccess As MailslotPermissionAccess, ByVal name As String, ByVal machineName1 As String)
        SetNames()
        Me.AddPermissionAccess(New MailslotPermissionEntry(permissionAccess, name, machineName1))
    End Sub 'New


    Public Sub New(ByVal permissionAccessEntries() As MailslotPermissionEntry)
        SetNames()
        If permissionAccessEntries Is Nothing Then
            Throw New ArgumentNullException("permissionAccessEntries")
        End If
        Dim index As Integer

        While index < permissionAccessEntries.Length
            Me.AddPermissionAccess(permissionAccessEntries(index))
        End While
    End Sub 'New 

    Public ReadOnly Property PermissionEntries() As ArrayList
        Get
            If Me.innerCollection Is Nothing Then
                Me.innerCollection = New ArrayList()
            End If
            Me.innerCollection.InsertRange(0, MyBase.GetPermissionEntries())

            Return Me.innerCollection
        End Get
    End Property


    Friend Overloads Sub AddPermissionAccess(ByVal entry As MailslotPermissionEntry)
        MyBase.AddPermissionAccess(entry.GetBaseEntry())
    End Sub 'AddPermissionAccess


    Friend Shadows Sub Clear()
        MyBase.Clear()
    End Sub 'Clear


    Friend Overloads Sub RemovePermissionAccess(ByVal entry As MailslotPermissionEntry)
        MyBase.RemovePermissionAccess(entry.GetBaseEntry())
    End Sub 'RemovePermissionAccess


    Private Sub SetNames()
        Me.PermissionAccessType = GetType(MailslotPermissionAccess)
        Me.TagNames = New String() {"Name", "Machine"}
    End Sub 'SetNames
End Class 'MailslotPermission

<Flags()> Public Enum MailslotPermissionAccess
    None = 0
    Send = 2
    Receive = 4 Or Send
End Enum 'MailslotPermissionAccess

<Serializable()> Public Class MailslotPermissionEntry
    Private nameVar As String
    Private machineNameVar As String
    Private permissionAccessVar As MailslotPermissionAccess


    Public Sub New(ByVal permissionAccess As MailslotPermissionAccess, ByVal name As String, ByVal machineName1 As String)
        Me.permissionAccessVar = permissionAccess
        Me.nameVar = name
        Me.machineNameVar = machineName1
    End Sub 'New


    Friend Sub New(ByVal baseEntry As ResourcePermissionBaseEntry)
        Me.permissionAccessVar = CType(baseEntry.PermissionAccess, MailslotPermissionAccess)
        Me.nameVar = baseEntry.PermissionAccessPath(0)
        Me.machineNameVar = baseEntry.PermissionAccessPath(1)
    End Sub 'New


    Public ReadOnly Property Name() As String
        Get
            Return Me.nameVar
        End Get
    End Property


    Public ReadOnly Property MachineName() As String
        Get
            Return Me.machineNameVar
        End Get
    End Property


    Public ReadOnly Property PermissionAccess() As MailslotPermissionAccess
        Get
            Return Me.permissionAccessVar
        End Get
    End Property


    Friend Function GetBaseEntry() As ResourcePermissionBaseEntry
        Dim baseEntry As New ResourcePermissionBaseEntry(CInt(Me.PermissionAccess), New String() {Me.Name, Me.MachineName})
        Return baseEntry
    End Function 'GetBaseEntry


End Class 'MailslotPermissionEntry

Remarks

Note

The ResourcePermissionBase class compares strings using ordinal sort rules and ignores the case of the strings being compared.

Notes to Inheritors

When you inherit from ResourcePermissionBase, you must provide at least three constructors, set two properties, and provide a third property. The required constructors are: a default constructor, one that takes a PermissionState as a parameter, and as many as needed that take values for the properties. The properties that need to be set are PermissionAccessType and TagNames. The third property that is needed is one that returns the permission entries. For an example of an implementation of this class, see PerformanceCounterPermission. In PerformanceCounterPermission, the TagNames property is set privately to "Machine" and "Category", the PermissionAccessType property is privately set to the type of PerformanceCounterPermissionAccess, and the PermissionEntries property returns the permission entries.

Constructors

ResourcePermissionBase() ResourcePermissionBase() ResourcePermissionBase() ResourcePermissionBase()

Initializes a new instance of the ResourcePermissionBase class.

ResourcePermissionBase(PermissionState) ResourcePermissionBase(PermissionState) ResourcePermissionBase(PermissionState) ResourcePermissionBase(PermissionState)

Initializes a new instance of the ResourcePermissionBase class with the specified level of access to resources at creation.

Fields

Any Any Any Any

Specifies the character to be used to represent the any wildcard character.

Local Local Local Local

Specifies the character to be used to represent a local reference.

Properties

PermissionAccessType PermissionAccessType PermissionAccessType PermissionAccessType

Gets or sets an enumeration value that describes the types of access that you are giving the resource.

TagNames TagNames TagNames TagNames

Gets or sets an array of strings that identify the resource you are protecting.

Methods

AddPermissionAccess(ResourcePermissionBaseEntry) AddPermissionAccess(ResourcePermissionBaseEntry) AddPermissionAccess(ResourcePermissionBaseEntry) AddPermissionAccess(ResourcePermissionBaseEntry)

Adds a permission entry to the permission.

Assert() Assert() Assert() Assert()

Declares that the calling code can access the resource protected by a permission demand through the code that calls this method, even if callers higher in the stack have not been granted permission to access the resource. Using Assert() can create security issues.

(Inherited from CodeAccessPermission)
Clear() Clear() Clear() Clear()

Clears the permission of the added permission entries.

Copy() Copy() Copy() Copy()

Creates and returns an identical copy of the current permission object.

Demand() Demand() Demand() Demand()

Forces a SecurityException at run time if all callers higher in the call stack have not been granted the permission specified by the current instance.

(Inherited from CodeAccessPermission)
Deny() Deny() Deny() Deny()

Prevents callers higher in the call stack from using the code that calls this method to access the resource specified by the current instance.

(Inherited from CodeAccessPermission)
Equals(Object) Equals(Object) Equals(Object) Equals(Object)

Determines whether the specified CodeAccessPermission object is equal to the current CodeAccessPermission.

(Inherited from CodeAccessPermission)
FromXml(SecurityElement) FromXml(SecurityElement) FromXml(SecurityElement) FromXml(SecurityElement)

Reconstructs a security object with a specified state from an XML encoding.

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

Gets a hash code for the CodeAccessPermission object that is suitable for use in hashing algorithms and data structures such as a hash table.

(Inherited from CodeAccessPermission)
GetPermissionEntries() GetPermissionEntries() GetPermissionEntries() GetPermissionEntries()

Returns an array of the ResourcePermissionBaseEntry objects added to this permission.

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

Gets the Type of the current instance.

(Inherited from Object)
Intersect(IPermission) Intersect(IPermission) Intersect(IPermission) Intersect(IPermission)

Creates and returns a permission object that is the intersection of the current permission object and a target permission object.

IsSubsetOf(IPermission) IsSubsetOf(IPermission) IsSubsetOf(IPermission) IsSubsetOf(IPermission)

Determines whether the current permission object is a subset of the specified permission.

IsUnrestricted() IsUnrestricted() IsUnrestricted() IsUnrestricted()

Gets a value indicating whether the permission is unrestricted.

MemberwiseClone() MemberwiseClone() MemberwiseClone() MemberwiseClone()

Creates a shallow copy of the current Object.

(Inherited from Object)
PermitOnly() PermitOnly() PermitOnly() PermitOnly()

Prevents callers higher in the call stack from using the code that calls this method to access all resources except for the resource specified by the current instance.

(Inherited from CodeAccessPermission)
RemovePermissionAccess(ResourcePermissionBaseEntry) RemovePermissionAccess(ResourcePermissionBaseEntry) RemovePermissionAccess(ResourcePermissionBaseEntry) RemovePermissionAccess(ResourcePermissionBaseEntry)

Removes a permission entry from the permission.

ToString() ToString() ToString() ToString()

Creates and returns a string representation of the current permission object.

(Inherited from CodeAccessPermission)
ToXml() ToXml() ToXml() ToXml()

Creates and returns an XML encoding of the security object and its current state.

Union(IPermission) Union(IPermission) Union(IPermission) Union(IPermission)

Creates a permission object that combines the current permission object and the target permission object.

Explicit Interface Implementations

IPermission.Demand() IPermission.Demand() IPermission.Demand() IPermission.Demand() Inherited from CodeAccessPermission
IStackWalk.Assert() IStackWalk.Assert() IStackWalk.Assert() IStackWalk.Assert() Inherited from CodeAccessPermission
IStackWalk.Demand() IStackWalk.Demand() IStackWalk.Demand() IStackWalk.Demand() Inherited from CodeAccessPermission
IStackWalk.Deny() IStackWalk.Deny() IStackWalk.Deny() IStackWalk.Deny() Inherited from CodeAccessPermission
IStackWalk.PermitOnly() IStackWalk.PermitOnly() IStackWalk.PermitOnly() IStackWalk.PermitOnly() Inherited from CodeAccessPermission

Security

SecurityPermission
for the right to control evidence. Security action: InheritanceDemand. Associated enumeration: ControlEvidence.

Applies to