Load(String,DicomDataSetLoadFlags) Method

Loads a Data Set from a disk file.

Syntax

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

public virtual void Load( 
   string name,
   DicomDataSetLoadFlags flags
)

'Declaration
 
Public Overloads Overridable Sub Load( _
   ByVal name As String, _
   ByVal flags As DicomDataSetLoadFlags _
)

'Usage
 
Dim instance As DicomDataSet
Dim name As String
Dim flags As DicomDataSetLoadFlags
 
instance.Load(name, flags)

public virtual void Load( 
   string name,
   DicomDataSetLoadFlags flags
)

public void load(String file, /*DicomDataSetLoadFlags*/ int flags)

 function Leadtools.Dicom.DicomDataSet.Load(String,DicomDataSetLoadFlags)( 
   name ,
   flags 
)

public:
virtual void Load( 
   String^ name,
   DicomDataSetLoadFlags flags
)

Parameters

name: The name of the file that contains the Data Set to be loaded.
flags: Meta-header flags and Transfer Syntax flags that indicate the file characteristics to use when loading the file.

Remarks

If you know certain characteristics of the file, you can set those in flags. Any characteristic that you do not set will be automatically determined. For example, if you know that the Meta-header is present, but you do not know the byte order, or whether the Value Representation is Implicit or Explicit, you can set only DicomDataSetLoadFlags.MetaHeaderPresent in flags. During loading, LEADTOOLS will determine the byte order and whether the byte order is Implicit or Explicit.

If you do not know any of the characteristics of the file, set flags to DicomDataSetLoadFlags.None and LEADTOOLS will automatically determine all the file characteristics and load the file accordingly.

If DicomDataSetLoadFlags.LoadAndClose is not included in flags, the file will remain open until the object is destructed, or one of the following methods is called: Reset, Initialize(DicomClassType,DicomDataSetInitializeType), or Load(String,DicomDataSetLoadFlags) (again). If LoadAndClose is used for large images it may slow performance; however, the file handle will be released. If set to None, large images will load quickly, and image traverse can begin immediately. Although, nothing can be done to the image until the file handle is released.

To load a Data Set from memory, call Load(IntPtr,Int64,DicomDataSetFlags).

Example

C#
Visual Basic
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

Copy Code

Imports Leadtools
Imports Leadtools.Dicom

Public Sub LoadEnumerateSample()
    Dim dicomFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "IMAGE3.dcm")
    '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)
       'Insert patient name element, if it doesn't already exist
       Dim element As DicomElement = ds.FindFirstElement(Nothing, DicomTag.PatientName, False)
       If element Is Nothing Then
          element = ds.InsertElement(Nothing, False, DicomTag.PatientName, DicomVRType.PN, False, 0)
       End If
       'The dataset should include the patient name element or an error occurred
       element = ds.FindLastElement(Nothing, DicomTag.PatientName, False)
       Debug.Assert(Not element Is Nothing)
       'There can be only one patient element in the root level
       element = ds.FindPreviousElement(Nothing, False)
       Debug.Assert(element Is Nothing)
       element = ds.FindNextElement(Nothing, False)
       Debug.Assert(element Is Nothing)

       element = ds.FindFirstElement(Nothing, DicomTag.PatientName, False)
       'Since the patient name element is in the root level,
       'GetRootElement will return the same element.
       Dim element1 As DicomElement = ds.GetRootElement(element)
       Debug.Assert((element1.Tag = element.Tag), "GetRootElement should return same element")

       'Since the patient name element has no parent then GetParentElement will return null
       element1 = ds.GetParentElement(element)
       Debug.Assert(element1 Is Nothing, "GetParentElement should return null")

       'Since the patient name element has no children then GetChildElement will return null
       element1 = ds.GetChildElement(element, False)
       Debug.Assert(element1 Is Nothing, "GetChildElement should return null")

       element1 = ds.GetFirstElement(element, False, False)
       Debug.Assert(Not element1 Is Nothing, "GetFirstElement Can't return null in this case")

       element1 = ds.GetLastElement(element, False, False)
       Debug.Assert(Not element1 Is Nothing, "GetLastElement Can't return null in this case")

       element1 = ds.GetPreviousElement(element, False, True)
       Dim element2 As DicomElement = ds.GetNextElement(element, False, True)

       Debug.Assert(ds.GetElementLevel(element) = 0)

       Debug.Assert(ds.ExistsElement(element))
       Debug.Assert(ds.IsVolatileElement(element) = False)

       'Patient Name is not the only element in this level
       Debug.Assert((Not element1 Is Nothing) AndAlso (Not element2 Is Nothing))
       'Delete the patient name element
       ds.DeleteElement(element)
    End Using
    DicomEngine.Shutdown()
 End Sub

Public NotInheritable Class LEAD_VARS
Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images"
End Class

using Leadtools;
using Leadtools.Dicom;

public void LoadEnumerateSample()
{
   string dicomFileName = Path.Combine(LEAD_VARS.ImagesDir, "IMAGE3.dcm");
   //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);
      //Insert patient name element, if it doesn't already exist
      DicomElement element = ds.FindFirstElement(null, DicomTag.PatientName, false);
      if (element == null)
      {
         element = ds.InsertElement(null, false, DicomTag.PatientName, DicomVRType.PN, false, 0);
      }
      //The dataset should include the patient name element or an error occurred
      element = ds.FindLastElement(null, DicomTag.PatientName, false);
      Debug.Assert(element != null);
      //There can be only one patient element in the root level
      element = ds.FindPreviousElement(null, false);
      Debug.Assert(element == null);
      element = ds.FindNextElement(null, false);
      Debug.Assert(element == null);

      element = ds.FindFirstElement(null, DicomTag.PatientName, false);
      //Since the patient name element is in the root level,
      //GetRootElement will return the same element.
      DicomElement element1 = ds.GetRootElement(element);
      Debug.Assert((element1.Tag == element.Tag), "GetRootElement should return same element");

      //Since the patient name element has no parent then GetParentElement will return null
      element1 = ds.GetParentElement(element);
      Debug.Assert(element1 == null, "GetParentElement should return null");

      //Since the patient name element has no children then GetChildElement will return null
      element1 = ds.GetChildElement(element, false);
      Debug.Assert(element1 == null, "GetChildElement should return null");

      element1 = ds.GetFirstElement(element, false, false);
      Debug.Assert(element1 != null, "GetFirstElement Can't return null in this case");

      element1 = ds.GetLastElement(element, false, false);
      Debug.Assert(element1 != null, "GetLastElement Can't return null in this case");

      element1 = ds.GetPreviousElement(element, false, true);
      DicomElement element2 = ds.GetNextElement(element, false, true);

      Debug.Assert(ds.GetElementLevel(element) == 0);

      Debug.Assert(ds.ExistsElement(element));
      Debug.Assert(ds.IsVolatileElement(element) == false);

      //Patient Name is not the only element in this level
      Debug.Assert((element1 != null) && (element2 != null));
      //Delete the patient name element
      ds.DeleteElement(element);
   }
   DicomEngine.Shutdown();
}

static class LEAD_VARS
{
public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images";
}

using Leadtools;
using Leadtools.Dicom;
using Leadtools.Examples;

public void LoadEnumerateSample(Stream dicomStream)
{
   //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(dicomStream, DicomDataSetLoadFlags.None);
      //Insert patient name element, if it doesn't already exist
      DicomElement element = ds.FindFirstElement(null, DicomTag.PatientName, false);
      if (element == null)
      {
         element = ds.InsertElement(null, false, DicomTag.PatientName, DicomVRType.PN, false, 0);
      }
      //The dataset should include the patient name element or an error occurred
      element = ds.FindLastElement(null, DicomTag.PatientName, false);
      Debug.Assert(element != null);
      //There can be only one patient element in the root level
      element = ds.FindPreviousElement(null, false);
      Debug.Assert(element == null);
      element = ds.FindNextElement(null, false);
      Debug.Assert(element == null);
      element = ds.FindFirstElement(null, DicomTag.PatientName, false);
      //Since the patient name element is in the root level,
      //GetRootElement will return the same element.
      DicomElement element1 = ds.GetRootElement(element);
      Debug.Assert((element1.Tag == element.Tag), "GetRootElement should return same element");

      //Since the patient name element has no parent then GetParentElement will return null
      element1 = ds.GetParentElement(element);
      Debug.Assert(element1 == null, "GetParentElement should return null");

      //Since the patient name element has no children then GetChildElement will return null
      element1 = ds.GetChildElement(element, false);
      Debug.Assert(element1 == null, "GetChildElement should return null");

      element1 = ds.GetFirstElement(element, false, false);
      Debug.Assert(element1 != null, "GetFirstElement Can't return null in this case");

      element1 = ds.GetLastElement(element, false, false);
      Debug.Assert(element1 != null, "GetLastElement Can't return null in this case");

      element1 = ds.GetPreviousElement(element, false, true);
      DicomElement element2 = ds.GetNextElement(element, false, true);

      Debug.Assert(ds.GetElementLevel(element) == 0);

      Debug.Assert(ds.ExistsElement(element));
      Debug.Assert(ds.IsVolatileElement(element) == false);

      //Patient Name is not the only element in this level
      Debug.Assert((element1 != null) && (element2 != null));
      //Delete the patient name element
      ds.DeleteElement(element);
   }
   DicomEngine.Shutdown();
}

Imports Leadtools
Imports Leadtools.Dicom

Public Sub LoadEnumerateSample(ByVal dicomStream As Stream)
   'Make sure to initialize the DICOM engine, this needs to be done only once 
   'In the whole application
   DicomEngine.Startup()
   Using ds As DicomDataSet = New DicomDataSet()
      'Load DICOM File
      ds.Load(dicomStream, DicomDataSetLoadFlags.None)
      'Insert patient name element, if it doesn't already exist
      Dim element As DicomElement = ds.FindFirstElement(Nothing, DicomTag.PatientName, False)
      If element Is Nothing Then
         element = ds.InsertElement(Nothing, False, DicomTag.PatientName, DicomVRType.PN, False, 0)
      End If
      'The dataset should include the patient name element or an error occurred
      element = ds.FindLastElement(Nothing, DicomTag.PatientName, False)
      Debug.Assert(Not element Is Nothing)
      'There can be only one patient element in the root level
      element = ds.FindPreviousElement(Nothing, False)
      Debug.Assert(element Is Nothing)
      element = ds.FindNextElement(Nothing, False)
      Debug.Assert(element Is Nothing)
      element = ds.FindFirstElement(Nothing, DicomTag.PatientName, False)
      'Since the patient name element is in the root level,
      'GetRootElement will return the same element.
      Dim element1 As DicomElement = ds.GetRootElement(element)
      Debug.Assert((element1.Tag = element.Tag), "GetRootElement should return same element")

      'Since the patient name element has no parent then GetParentElement will return null
      element1 = ds.GetParentElement(element)
      Debug.Assert(element1 Is Nothing, "GetParentElement should return null")

      'Since the patient name element has no children then GetChildElement will return null
      element1 = ds.GetChildElement(element, False)
      Debug.Assert(element1 Is Nothing, "GetChildElement should return null")

      element1 = ds.GetFirstElement(element, False, False)
      Debug.Assert(Not element1 Is Nothing, "GetFirstElement Can't return null in this case")

      element1 = ds.GetLastElement(element, False, False)
      Debug.Assert(Not element1 Is Nothing, "GetLastElement Can't return null in this case")

      element1 = ds.GetPreviousElement(element, False, True)
      Dim element2 As DicomElement = ds.GetNextElement(element, False, True)

      Debug.Assert(ds.GetElementLevel(element) = 0)

      Debug.Assert(ds.ExistsElement(element))
      Debug.Assert(ds.IsVolatileElement(element) = False)

      'Patient Name is not the only element in this level
      Debug.Assert((Not element1 Is Nothing) AndAlso (Not element2 Is Nothing))
      'Delete the patient name element
      ds.DeleteElement(element)
   End Using
   DicomEngine.Shutdown()
End Sub

Requirements

Target Platforms

Reference

DicomDataSet Class
DicomDataSet Members
Overload List
Load(IntPtr,Int64,DicomDataSetFlags) Method
Save(String,DicomDataSetSaveFlags) Method