Public Function GetSignaturesCount( _
   ByVal item As DicomElement _
) As Integer

Visual Basic (Usage)	Copy Code
Dim instance As DicomDataSet Dim item As DicomElement Dim value As Integer   value = instance.GetSignaturesCount(item)

public int GetSignaturesCount( 
   DicomElement item
)

public:
int GetSignaturesCount( 
   DicomElement^ item
) 

Parameters

item

An item of a sequence of items in the Data Set. The method returns the number of Digital Signatures in this Item. If this parameter is set to null, the method will return the number of Digital Signatures in the main Data Set.

Return Value

This example will enumerate all digital signatures in a DICOM dataset.

Visual Basic

Copy Code

Public Sub EnumerateSignatures()    Dim dicomFileName As String = LeadtoolsExamples.Common.ImagesPath.Path + "Signed.dcm"    'Make sure to initialize the DICOM engine, this needs to be done only once    'In the whole application    DicomEngine.Startup()    Dim dataset As DicomDataSet = New DicomDataSet()    Using (dataset)       'Load DICOM File       dataset.Load(dicomFileName, DicomDataSetLoadFlags.None)       ' We will enumerate the Digital Signatures in the main Data Set       Dim signaturesCount As Integer = dataset.GetSignaturesCount(Nothing)       If signaturesCount = 0 Then          MessageBox.Show("No Digital Signatures in the main Data Set.")          Return       End If       Dim msg As String       If signaturesCount = 1 Then          msg = "There is 1 Digital Signature in the main Data Set.Do you want to examine it?"       Else          msg = String.Format("There are {0} Digital Signatures in the main Data Set. Do you want to examine them?", signaturesCount)       End If       If MessageBox.Show(msg, "Sample", MessageBoxButtons.YesNo) <> DialogResult.Yes Then          Return       End If       Dim i As Integer = 0       Do While i < signaturesCount          ExamineSignature(dataset, dataset.GetSignature(Nothing, i))          i += 1       Loop    End Using    DicomEngine.Shutdown() End Sub

C#

Copy Code

public void EnumerateSignatures()  {     string dicomFileName = LeadtoolsExamples.Common.ImagesPath.Path + "Signed.dcm";     //Make sure to initialize the DICOM engine, this needs to be done only once      //In the whole application     DicomEngine.Startup();     using (DicomDataSet dataset = new DicomDataSet())     {        //Load DICOM File        dataset.Load(dicomFileName, DicomDataSetLoadFlags.None);        // We will enumerate the Digital Signatures in the main Data Set        int signaturesCount = dataset.GetSignaturesCount(null);        if (signaturesCount == 0)        {           MessageBox.Show("No Digital Signatures in the main Data Set.");           return;        }        string msg;        if (signaturesCount == 1)        {           msg = "There is 1 Digital Signature in the main Data Set.Do you want to examine it?";        }        else        {           msg = String.Format("There are {0} Digital Signatures in the main Data Set. Do you want to examine them?", signaturesCount);        }        if (MessageBox.Show(msg, "Sample", MessageBoxButtons.YesNo) != DialogResult.Yes)        {           return;        }        for (int i = 0; i < signaturesCount; i++)        {           ExamineSignature(dataset, dataset.GetSignature(null, i));        }     }     DicomEngine.Shutdown();  }

One way of enumerating the Digital Signatures in the main Data Set or in an item of a sequence of items is by using this method along with the GetSignature method.

Target Platforms: Microsoft .NET Framework 3.0, Windows XP, Windows Server 2003 family, Windows Server 2008 family

Reference