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
) 

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 = LeadtoolsExamples.Common.ImagesPath.Path + "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 = LeadtoolsExamples.Common.ImagesPath.Path + "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 3.0, Windows XP, Windows Server 2003 family, Windows Server 2008 family

Reference