ModificationVerifier Class

Definition

Namespace:

DocumentFormat.OpenXml.Presentation

Assembly:

DocumentFormat.OpenXml.dll

Package:

DocumentFormat.OpenXml v3.0.1

Defines the ModificationVerifier Class.

This class is available in Office 2007 and above.

When the object is serialized out as xml, it's qualified name is p:modifyVerifier.

public class ModificationVerifier : DocumentFormat.OpenXml.OpenXmlLeafElement

type ModificationVerifier = class
    inherit OpenXmlLeafElement

Public Class ModificationVerifier
Inherits OpenXmlLeafElement

Inheritance

Object

OpenXmlElement

OpenXmlLeafElement

ModificationVerifier

Remarks

[ISO/IEC 29500-1 1st Edition]

modifyVerifier (Modification Verifier)

This element specifies the write protection settings which have been applied to a PresentationML document. Write protection refers to a mode in which the document's contents should not be modified, and the document should not be resaved using the same file name.

When present, the application shall require a password to enable modifications to the document. If the supplied password does not match the hash value in this attribute, then write protection shall be enabled. If this element is omitted, then no write protection shall be applied to the current document. Since this protection does not encrypt the document, malicious applications might circumvent its use.

The password supplied to the algorithm is to be a UTF-16LE encoded string; strings longer than 255 characters are truncated to 255 characters. If there is a leading BOM character (U+FEFF) in the encoded password it is removed before hash calculation. The attributes of this element specify the algorithm to be used to verify the password provided by the user.

[Example: Consider a PresentationML document that can only be opened in a write protected state unless a password is provided, in which case the file would be opened in an editable state. This requirement would be specified using the following PresentationML:

<p:modifyVerifier p:algorithmName="SHA-512" … p:hashValue="9oN7nWkCAyEZib1RomSJTjmPpCY=" … />   

…In order for the hosting application to enable edits to the document, the hosting application would have to be provided with a password that the hosting application would then hash using the algorithm specified by the algorithm attributes and compare to the value of the hashValue attribute (9oN7nWkCAyEZib1RomSJTjmPpCY=). If the two values matched, the file would be opened in an editable state. end example]

Parent Elements
presentation (§19.2.1.26)

[Note: The W3C XML Schema definition of this element’s content model (CT_ModifyVerifier) is located in §A.3. end note]

� ISO/IEC29500: 2008.

Constructors

ModificationVerifier()

Initializes a new instance of the ModificationVerifier class.

Properties

AlgorithmName	algorithmName, this property is only available in Office 2010 and later. Represents the following attribute in the schema: algorithmName
ChildElements	Gets all the child nodes of the current element. (Inherited from OpenXmlElement)
CryptographicAlgorithmClass	Cryptographic Algorithm Class Represents the following attribute in the schema: cryptAlgorithmClass
CryptographicAlgorithmSid	Cryptographic Hashing Algorithm Represents the following attribute in the schema: cryptAlgorithmSid
CryptographicAlgorithmType	Cryptographic Algorithm Type Represents the following attribute in the schema: cryptAlgorithmType
CryptographicProvider	Cryptographic Provider Represents the following attribute in the schema: cryptProvider
CryptographicProviderType	Cryptographic Provider Type Represents the following attribute in the schema: cryptProviderType
CryptographicProviderTypeExtensibility	Cryptographic Provider Type Extensibility Represents the following attribute in the schema: cryptProviderTypeExt
CryptographicProviderTypeExtensibilitySource	Provider Type Extensibility Source Represents the following attribute in the schema: cryptProviderTypeExtSource
ExtendedAttributes	Gets all extended attributes (attributes not defined in the schema) of the current element. (Inherited from OpenXmlElement)
ExtendedCryptographicAlgorithm	Cryptographic Algorithm Extensibility Represents the following attribute in the schema: algIdExt
ExtendedCryptographicAlgorithmSource	Algorithm Extensibility Source Represents the following attribute in the schema: algIdExtSource
Features	Gets a IFeatureCollection for the current element. This feature collection will be read-only, but will inherit features from its parent part and package if available. (Inherited from OpenXmlElement)
FirstChild	Gets the first child of the OpenXmlElement element. Returns null (Nothing in Visual Basic) if there is no such OpenXmlElement element. (Inherited from OpenXmlElement)
HasAttributes	Gets a value indicating whether the current element has any attributes. (Inherited from OpenXmlElement)
HasChildren	Gets a value that indicates whether the current element has any child elements. (Inherited from OpenXmlLeafElement)
HashData	Password Hash Represents the following attribute in the schema: hashData
HashValue	hashValue, this property is only available in Office 2010 and later. Represents the following attribute in the schema: hashValue
InnerText	Gets or sets the concatenated values of the node and all of its children. (Inherited from OpenXmlElement)
InnerXml	Gets or sets the markup that only represents child elements of the current element. (Inherited from OpenXmlLeafElement)
LastChild	Gets the last child of the OpenXmlElement element. Returns null (Nothing in Visual Basic) if there is no such OpenXmlElement element. (Inherited from OpenXmlElement)
LocalName	Gets the local name of the current element. (Inherited from OpenXmlElement)
MCAttributes	Gets or sets the markup compatibility attributes. Returns null if no markup compatibility attributes are defined for the current element. (Inherited from OpenXmlElement)
NamespaceDeclarations	Gets all the namespace declarations defined in the current element. Returns an empty enumerator if there is no namespace declaration. (Inherited from OpenXmlElement)
NamespaceUri	Gets the namespace URI of the current element. (Inherited from OpenXmlElement)
OpenXmlElementContext	Gets the OpenXmlElementContext of the current element. (Inherited from OpenXmlElement)
OuterXml	Gets the markup that represents the current element and all of its child elements. (Inherited from OpenXmlElement)
Parent	Gets the parent element of the current element. (Inherited from OpenXmlElement)
Prefix	Gets the namespace prefix of current element. (Inherited from OpenXmlElement)
SaltData	Salt for Password Verifier Represents the following attribute in the schema: saltData
SaltValue	saltValue, this property is only available in Office 2010 and later. Represents the following attribute in the schema: saltValue
SpinCount	Iterations to Run Hashing Algorithm Represents the following attribute in the schema: spinCount
SpinValue	spinValue, this property is only available in Office 2010 and later. Represents the following attribute in the schema: spinValue
XmlQualifiedName	Gets the qualified name of the current element. (Inherited from OpenXmlElement)
XName	Gets the qualified name of the current element. (Inherited from OpenXmlElement)

Methods

AddAnnotation(Object)	Adds an object to the current OpenXmlElement element's list of annotations. (Inherited from OpenXmlElement)
AddNamespaceDeclaration(String, String)	Adds a namespace declaration to the current node. (Inherited from OpenXmlElement)
Ancestors()	Enumerates all of the current element's ancestors. (Inherited from OpenXmlElement)
Ancestors<T>()	Enumerates only the current element's ancestors that have the specified type. (Inherited from OpenXmlElement)
Annotation(Type)	Get the first annotation object of the specified type from the current OpenXmlElement element. (Inherited from OpenXmlElement)
Annotation<T>()	Get the first annotation object of the specified type from the current OpenXmlElement element. (Inherited from OpenXmlElement)
Annotations(Type)	Gets a collection of annotations with the specified type for the current OpenXmlElement element. (Inherited from OpenXmlElement)
Annotations<T>()	Gets a collection of annotations with the specified type for the current OpenXmlElement element. (Inherited from OpenXmlElement)
Append(IEnumerable<OpenXmlElement>)	Appends each element from a list of elements to the end of the current element's list of child elements. (Inherited from OpenXmlElement)
Append(OpenXmlElement[])	Appends each element from an array of elements to the end of the current element's list of child elements. (Inherited from OpenXmlElement)
AppendChild<T>(T)	Appends the specified element to the end of the current element's list of child nodes. (Inherited from OpenXmlElement)
ClearAllAttributes()	Clears all of the attributes, including both known attributes and extended attributes. (Inherited from OpenXmlElement)
Clone()	Creates a duplicate of the current node. (Inherited from OpenXmlElement)
CloneNode(Boolean)	Creates a duplicate of this node.
Descendants()	Enumerates all of the current element's descendants. (Inherited from OpenXmlElement)
Descendants<T>()	Enumerate all of the current element's descendants of type T. (Inherited from OpenXmlElement)
Elements()	Enumerates all of the current element's children. (Inherited from OpenXmlElement)
Elements<T>()	Enumerates only the current element's children that have the specified type. (Inherited from OpenXmlElement)
ElementsAfter()	Enumerates all of the sibling elements that follow the current element and have the same parent as the current element. (Inherited from OpenXmlElement)
ElementsBefore()	Enumerates all of the sibling elements that precede the current element and have the same parent as the current element. (Inherited from OpenXmlElement)
GetAttribute(String, String)	Gets an Open XML attribute with the specified tag name and namespace URI. (Inherited from OpenXmlElement)
GetAttributes()	Gets a list that contains a copy of all the attributes. (Inherited from OpenXmlElement)
GetEnumerator()	Returns an enumerator that iterates through the child collection. (Inherited from OpenXmlElement)
GetFirstChild<T>()	Finds the first child element in type T. (Inherited from OpenXmlElement)
InsertAfter<T>(T, OpenXmlElement)	Inserts the specified element immediately after the specified reference element. (Inherited from OpenXmlElement)
InsertAfterSelf<T>(T)	Inserts the specified element immediately after the current element. (Inherited from OpenXmlElement)
InsertAt<T>(T, Int32)	Inserts the specified element at the specified index in the current element's list of child elements. (Inherited from OpenXmlElement)
InsertBefore<T>(T, OpenXmlElement)	Inserts the specified element immediately before the specified reference element. (Inherited from OpenXmlElement)
InsertBeforeSelf<T>(T)	Inserts the specified element immediately before the current element. (Inherited from OpenXmlElement)
IsAfter(OpenXmlElement)	Determines if the current element appears after a specified element in document order. (Inherited from OpenXmlElement)
IsBefore(OpenXmlElement)	Determines if the current element appears before a specified element in document order. (Inherited from OpenXmlElement)
LookupNamespace(String)	Resolves the namespace prefix in the context of the current node. (Inherited from OpenXmlElement)
LookupPrefix(String)	Finds the corresponding prefix for a namespace uri in the current element scope. (Inherited from OpenXmlElement)
NextSibling()	Gets the OpenXmlElement element that immediately follows the current OpenXmlElement element. Returns null (Nothing in Visual Basic) if there is no next OpenXmlElement element. (Inherited from OpenXmlElement)
NextSibling<T>()	Gets the OpenXmlElement element with the specified type that follows the current OpenXmlElement element. Returns null (Nothing in Visual Basic) if there is no next OpenXmlElement. (Inherited from OpenXmlElement)
PrependChild<T>(T)	Inserts the specified element at the beginning of the current element's list of child elements. (Inherited from OpenXmlElement)
PreviousSibling()	Gets the OpenXmlElement element that immediately precedes the current OpenXmlElement element. Returns null (Nothing in Visual Basic ) if there is no preceding OpenXmlElement element. (Inherited from OpenXmlElement)
PreviousSibling<T>()	Gets the OpenXmlElement element with the specified type that precedes the current OpenXmlElement. Returns null (Nothing in Visual Basic) if there is no preceding OpenXmlElement element. (Inherited from OpenXmlElement)
Remove()	Removes the current element from its parent. (Inherited from OpenXmlElement)
RemoveAllChildren()	Removes all child elements of the current element. (Inherited from OpenXmlLeafElement)
RemoveAllChildren<T>()	Remove all of the current element's child elements that are of type T. (Inherited from OpenXmlElement)
RemoveAnnotations(Type)	Removes the annotations of the specified type from the current OpenXmlElement element. (Inherited from OpenXmlElement)
RemoveAnnotations<T>()	Removes the annotations with the specified type from the current OpenXmlElement element. (Inherited from OpenXmlElement)
RemoveAttribute(String, String)	Removes the attribute from the current element. (Inherited from OpenXmlElement)
RemoveChild<T>(T)	Removes the specified child element from the current element's list of child elements. (Inherited from OpenXmlElement)
RemoveNamespaceDeclaration(String)	Removes the namespace declaration for the specified prefix. Removes nothing if there is no prefix. (Inherited from OpenXmlElement)
ReplaceChild<T>(OpenXmlElement, T)	Replaces a child element with another child element in the current element's list of child elements. (Inherited from OpenXmlElement)
SetAttribute(OpenXmlAttribute)	Sets an attribute to the specified element. If the attribute is a known attribute, the value of the attribute is set. If the attribute is an extended attribute, the 'openxmlAttribute' is added to the extended attributes list. (Inherited from OpenXmlElement)
SetAttributes(IEnumerable<OpenXmlAttribute>)	Sets a number of attributes to the element. If an attribute is a known attribute, the value of the attribute is set. If an attribute is an extended attribute, the 'openxmlAttribute' is added to the extended attributes list. (Inherited from OpenXmlElement)
WriteTo(XmlWriter)	Saves the current node to the specified XmlWriter. (Inherited from OpenXmlElement)

Explicit Interface Implementations

IEnumerable.GetEnumerator()	(Inherited from OpenXmlElement)
IEnumerable<OpenXmlElement>.GetEnumerator()	Returns an enumerator that iterates through the child collection. (Inherited from OpenXmlElement)