Public Function FindSignature( _
   ByVal signatureUID As String _
) As DicomElement

Visual Basic (Usage)	Copy Code
Dim instance As DicomDataSet Dim signatureUID As String Dim value As DicomElement   value = instance.FindSignature(signatureUID)

public DicomElement FindSignature( 
   string signatureUID
)

public: DicomElement* FindSignature( 
   string* signatureUID
) 

public:
DicomElement^ FindSignature( 
   String^ signatureUID
) 

Parameters

signatureUID

Character string that contains the Digital Signature UID of the Digital Signature for which to search.

Return Value

This example will locate (find) a digital signature inside a DICOM dataset by searching for its UID.

Visual Basic

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Public Sub FindSignature()   Dim dicomFileName As String = "C:\Program Files\LEAD Technologies, Inc\LEADTOOLS 14.5\Images\IMAGE3.dic"   'Make sure to initialize the DICOM engine, this needs to be done only once   'In the whole application   DicomEngine.Startup()     Dim ds As DicomDataSet = New DicomDataSet()     Using (ds)        'Load DICOM File        ds.Load(dicomFileName, DicomDataSetLoadFlags.None)        Dim signatureUID As String = "1.2.840.114257.0.130573664"        ' Search the whole Data Set for the Digital Signature with the        ' specified Digital Signature UID        Dim signatureItem As DicomElement = ds.FindSignature(signatureUID)        If Not signatureItem Is Nothing Then           ds.DeleteSignature(signatureItem)           MessageBox.Show("The Digital Signature was found and got deleted.", "Sample")        Else           MessageBox.Show("The Digital Signature could not be found.", "Sample")        End If     End Using     DicomEngine.Shutdown()  End Sub

C#

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public void FindSignature()   {     string dicomFileName  = @"C:\Program Files\LEAD Technologies, Inc\LEADTOOLS 14.5\Images\IMAGE3.dic";     //Make sure to initialize the DICOM engine, this needs to be done only once      //In the whole application     DicomEngine.Startup();     using(DicomDataSet ds = new DicomDataSet())     {        //Load DICOM File        ds.Load(dicomFileName, DicomDataSetLoadFlags.None);        string signatureUID = "1.2.840.114257.0.130573664";        // Search the whole Data Set for the Digital Signature with the        // specified Digital Signature UID        DicomElement signatureItem = ds.FindSignature(signatureUID);        if (signatureItem != null)        {           ds.DeleteSignature(signatureItem);           MessageBox.Show("The Digital Signature was found and got deleted.", "Sample");        }        else        {           MessageBox.Show("The Digital Signature could not be found.", "Sample");        }     }     DicomEngine.Shutdown();  }

Once the Digital Signatures Sequence Item is obtained, the following methods can be used to verify, delete, or get information about the Digital Signature:

VerifySignature

DeleteSignature

GetSignatureUID

GetSignatureDateTime

GetSignedElementsCount

GetSignedElement

GetMacTransferSyntax

GetMacAlgorithm

SaveCertificate

Call the GetSignaturesCount and GetSignature methods to enumerate the Digital Signatures in the main Data Set or in an item of a Sequence of Items.

Target Platforms: Microsoft .NET Framework 2.0, Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

Reference