System.Security.Permissions.FileDialogPermissionAttribute Class

Assembly: Mscorlib.dll
Namespace: System.Security.Permissions
Summary
Allows security actions for FileDialogPermission to be applied to code using declarative security. This class cannot be inherited.
C# Syntax:
[AttributeUsage(AttributeTargets.Assembly | AttributeTargets.Class | AttributeTargets.Struct | AttributeTargets.Constructor | AttributeTargets.Method)]
[Serializable]
public sealed class FileDialogPermissionAttribute : CodeAccessSecurityAttribute
Remarks
The scope of the declaration that is allowed depends on the SecurityAction that is used.

The security information declared by a security attribute is stored in the metadata of the attribute target and is accessed by the system at run time. Security attributes are used only for declarative security. For imperative security, use the corresponding permission class.

Example
The following example of a declarative attribute shows the correct way to request FileDialogPermission and states that you must have at least this permission to run your code.
 [assembly:FileDialogPermissionAttribute(SecurityAction.RequestMinimum, Unrestricted=true)]
 //In C#, you must specify that you are using the assembly scope when making a request.

    

The following example shows how to demand that the calling code has FileDialogPermission at link time. Demands are typically made in managed libraries (DLLs) to protect methods or classes from potentially harmful code.

 [FileDialogPermissionAttribute(SecurityAction.LinkDemand, Unrestricted=true)]

    
See also:
System.Security.Permissions Namespace See also:
MSDN: extendingmetadatausingattributes | FileDialogPermission | FileDialogPermissionAccess

System.Security.Permissions.FileDialogPermissionAttribute Member List:

Public Constructors
ctor #1 Initializes a new instance of the FileDialogPermissionAttribute class with the specified SecurityAction.
Public Properties
Action
(inherited from System.Security.Permissions.SecurityAttribute)
Read-write

See base class member description: System.Security.Permissions.SecurityAttribute.Action


Gets or sets a security action.
Open Read-write

Gets or sets a value indicating whether permission to open files through the file dialog is declared.
Save Read-write

Gets or sets a value indicating whether permission to save files through the file dialog is declared.
TypeId
(inherited from System.Attribute)
Read-only

See base class member description: System.Attribute.TypeId


When implemented in a derived class, gets a unique identifier for this Attribute.
Unrestricted
(inherited from System.Security.Permissions.SecurityAttribute)
Read-write

See base class member description: System.Security.Permissions.SecurityAttribute.Unrestricted


Gets or sets a value indicating whether full (unrestricted) permission to the resource protected by the attribute is declared.
Public Methods
CreatePermission Overridden:
Creates and returns a new FileDialogPermission.
Equals
(inherited from System.Object)
See base class member description: System.Object.Equals

Derived from System.Object, the primary base class for all objects.
GetHashCode
(inherited from System.Attribute)
See base class member description: System.Attribute.GetHashCode


Returns the hash code for this instance.
GetType
(inherited from System.Object)
See base class member description: System.Object.GetType

Derived from System.Object, the primary base class for all objects.
IsDefaultAttribute
(inherited from System.Attribute)
See base class member description: System.Attribute.IsDefaultAttribute


When overridden in a derived class, returns an indication whether the value of this instance is the default value for the derived class.
Match
(inherited from System.Attribute)
See base class member description: System.Attribute.Match


When overridden in a derived class, returns a value indicating whether this instance equals a specified object.
ToString
(inherited from System.Object)
See base class member description: System.Object.ToString

Derived from System.Object, the primary base class for all objects.
Protected Methods
Finalize
(inherited from System.Object)
See base class member description: System.Object.Finalize

Derived from System.Object, the primary base class for all objects.
MemberwiseClone
(inherited from System.Object)
See base class member description: System.Object.MemberwiseClone

Derived from System.Object, the primary base class for all objects.

Hierarchy:


System.Security.Permissions.FileDialogPermissionAttribute Member Details

ctor #1
Summary
Initializes a new instance of the FileDialogPermissionAttribute class with the specified SecurityAction.
C# Syntax:
public FileDialogPermissionAttribute(
   SecurityAction action
);
Parameters:

action

One of the SecurityAction values.

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Property: Action (read-write)
Inherited
See base class member description: System.Security.Permissions.SecurityAttribute.Action

Summary
Gets or sets a security action.
C# Syntax:
public SecurityAction Action {get; set;}
Remarks
This property is inherited by all classes implementing custom attributes for declarative security.

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Property: Open (read-write)
Summary
Gets or sets a value indicating whether permission to open files through the file dialog is declared.
C# Syntax:
public bool Open {get; set;}

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Property: Save (read-write)
Summary
Gets or sets a value indicating whether permission to save files through the file dialog is declared.
C# Syntax:
public bool Save {get; set;}

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Property: TypeId (read-only)
Inherited
See base class member description: System.Attribute.TypeId

Summary
When implemented in a derived class, gets a unique identifier for this Attribute.
C# Syntax:
public virtual object TypeId {get;}
Remarks
As implemented, this identifier is merely the Type of the attribute. However, it is intended that the unique identifier be used to identify two attributes of the same type.

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Property: Unrestricted (read-write)
Inherited
See base class member description: System.Security.Permissions.SecurityAttribute.Unrestricted

Summary
Gets or sets a value indicating whether full (unrestricted) permission to the resource protected by the attribute is declared.
C# Syntax:
public bool Unrestricted {get; set;}
Remarks
This property is inherited by all classes implementing custom attributes for declarative security.

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Overridden Method: CreatePermission()
Summary
Creates and returns a new FileDialogPermission.
C# Syntax:
public override IPermission CreatePermission();
Return Value:
A FileDialogPermission that corresponds to this attribute.
Remarks
This method should only be called by the security system, never by application code.

At compile time, attributes convert security declarations to a serialized form in metadata. Declarative security data in metadata is created from the permission that this method returns that corresponds to this attribute.

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Method: Equals(
   object obj
)
Inherited
See base class member description: System.Object.Equals
C# Syntax:
public virtual bool Equals(
   object obj
);

For more information on members inherited from System.Object click on the link above.

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Method: Finalize()
Inherited
See base class member description: System.Object.Finalize
C# Syntax:
~FileDialogPermissionAttribute();

For more information on members inherited from System.Object click on the link above.

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Method: GetHashCode()
Inherited
See base class member description: System.Attribute.GetHashCode

Summary
Returns the hash code for this instance.
C# Syntax:
public override int GetHashCode();
Return Value:
A 32-bit signed integer hash code.

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Method: GetType()
Inherited
See base class member description: System.Object.GetType
C# Syntax:
public Type GetType();

For more information on members inherited from System.Object click on the link above.

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Method: IsDefaultAttribute()
Inherited
See base class member description: System.Attribute.IsDefaultAttribute

Summary
When overridden in a derived class, returns an indication whether the value of this instance is the default value for the derived class.
C# Syntax:
public virtual bool IsDefaultAttribute();
Return Value:
true if this instance is the default attribute for the class; otherwise, false.
Remarks
The default implementation of this class returns false, and must be implemented in the derived class to be useful to that class.

The implementation of this method in a derived class compares the value of this instance to a standard, default value obtained by some means, then returns a Boolean value that indicates whether the value of this instance is equal to the standard. The standard value is typically coded as a constant in the implementation, or stored programmatically in a field used by the implementation.

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Method: Match(
   object obj
)
Inherited
See base class member description: System.Attribute.Match

Summary
When overridden in a derived class, returns a value indicating whether this instance equals a specified object.
C# Syntax:
public virtual bool Match(
   object obj
);
Parameters:

obj

An Object to compare with this instance of Attribute.

Return Value:
true if this instance equals obj; otherwise, false.
Remarks
This method determines if one Attribute equals another. Its default implementation is the same as Attribute.Equals, which performs a value and reference comparison. Override this method to implement support for attribute values, such as flags or bitfields, that consist of components that are meaningful in themselves. For example, consider an attribute whose value is a binary field divided into a bitfield of flags. Two instances of this attribute have one flag in set in common while all the other flags differ. The Equal method cannot determine that the two instances have the same flag set, but the Match method can.

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Method: MemberwiseClone()
Inherited
See base class member description: System.Object.MemberwiseClone
C# Syntax:
protected object MemberwiseClone();

For more information on members inherited from System.Object click on the link above.

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Method: ToString()
Inherited
See base class member description: System.Object.ToString
C# Syntax:
public virtual string ToString();

For more information on members inherited from System.Object click on the link above.

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