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
) 

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 = "C:\Program Files\LEAD Technologies, Inc\LEADTOOLS 14.5\Images\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#

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public void EnumerateSignatures()  {     string dicomFileName = @"C:\Program Files\LEAD Technologies, Inc\LEADTOOLS 14.5\Images\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 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