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Load(string,DicomDataSetLoadFlags) Method

Summary

Loads a Data Set from a disk file.

Syntax
C#
VB
Java
C++
public virtual void Load( 
   string name, 
   DicomDataSetLoadFlags flags 
) 
Public Overloads Overridable Sub Load( _ 
   ByVal name As String, _ 
   ByVal flags As DicomDataSetLoadFlags _ 
)  
public void load(String file, /*DicomDataSetLoadFlags*/ int 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, or Load (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.

Example

This example will load a DICOM Dataset and enumerate all its elements.

C#
VB
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"; 
} 
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 
c#[Silverlight C# Example] 
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(); 
} 
vb[Silverlight VB Example] 
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

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Leadtools.Dicom Assembly