GetSignedElement Method

Visual Basic
C#
WinRT C#
Objective-C
Java
WinRT JavaScript
C++

public DicomElement GetSignedElement( 
   DicomElement signatureItem,
   int index
)

'Declaration
 
Public Function GetSignedElement( _
   ByVal signatureItem As DicomElement, _
   ByVal index As Integer _
) As DicomElement

'Usage
 
Dim instance As DicomDataSet
Dim signatureItem As DicomElement
Dim index As Integer
Dim value As DicomElement
 
value = instance.GetSignedElement(signatureItem, index)

public DicomElement GetSignedElement( 
   DicomElement signatureItem,
   int index
)

ObjectiveC Syntax

 function Leadtools.Dicom.DicomDataSet.GetSignedElement( 
   signatureItem ,
   index 
)

public:
DicomElement^ GetSignedElement( 
   DicomElement^ signatureItem,
   int index
)

Parameters

signatureItem: The Digital Signatures Sequence Item that corresponds to the Digital Signature. This cannot be null.
index: The zero-based index of the required signed Data Element. This should be a number from 0 to GetSignedElementsCount(signatureItem) - 1.

Return Value

The required signed Data Element. The return value can be a null reference (Nothing in Visual Basic); e.g., if the specified index is invalid.

The Digital Signatures Sequence Item of a Digital Signature should reference an item under the Message Authentication Code (MAC) Parameters Sequence associated with the Digital Signatures Sequence. The Data Elements Signed (0400,0020) under the referenced MAC Parameters Sequence Item specifies the tags of the Data Elements covered by the Digital Signature. These Data Elements should be located at the same level as the MAC Parameters Sequence and the Digital Signatures Sequence.

The GetSignedElementsCount method returns the number of signed Data Elements as specified by the Data Elements Signed (0400,0020). The GetSignedElement method searches the level at which the MAC Parameters Sequence appears for the Data Element with the tag determined by the passed index and returns the Data Element if it does exist; if it does not exist, the method returns a null reference (Nothing in Visual Basic).

Note: In addition to the Data Elements specified by the Data Elements Signed (0400,0020), certain Data Elements under the Digital Signatures Sequence Item are always covered by the Digital Signature.

The following methods can also be used to get information about the Digital Signature:

For an example, refer to VerifySignature.

Target Platforms: 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

Reference

DicomDataSet Class
DicomDataSet Members
GetSignedElementsCount Method
GetSignature Method
FindSignature Method
GetSignatureUID Method
GetSignatureDateTime Method
GetMacTransferSyntax Method
GetMacAlgorithm Method
SaveCertificate Method