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GetLastElement Method
See Also 
Leadtools.Dicom Namespace > DicomDataSet Class : GetLastElement Method



element
An item in the Data Set.
tree
true to evaluate the Data Set as a tree; false to evaluate the Data Set as a list.
includeVolatile
true to retrieve the last element, volatile or non-volatile; false to retrieve the last non-volatile element.
element
An item in the Data Set.
tree
true to evaluate the Data Set as a tree; false to evaluate the Data Set as a list.
includeVolatile
true to retrieve the last element, volatile or non-volatile; false to retrieve the last non-volatile element.
Returns the last item in the Data Set. Supported in Silverlight, Windows Phone 7.

Syntax

Visual Basic (Declaration) 
Public Function GetLastElement( _
   ByVal element As DicomElement, _
   ByVal tree As Boolean, _
   ByVal includeVolatile As Boolean _
) As DicomElement
Visual Basic (Usage)Copy Code
Dim instance As DicomDataSet
Dim element As DicomElement
Dim tree As Boolean
Dim includeVolatile As Boolean
Dim value As DicomElement
 
value = instance.GetLastElement(element, tree, includeVolatile)
C# 
public DicomElement GetLastElement( 
   DicomElement element,
   bool tree,
   bool includeVolatile
)
C++/CLI 
public:
DicomElement^ GetLastElement( 
   DicomElement^ element,
   bool tree,
   bool includeVolatile
) 

Parameters

element
An item in the Data Set.
tree
true to evaluate the Data Set as a tree; false to evaluate the Data Set as a list.
includeVolatile
true to retrieve the last element, volatile or non-volatile; false to retrieve the last non-volatile element.

Return Value

The last item in the Data Set, or a null reference (Nothing in Visual Basic) if the Data Set is empty.

Example

For an example, refer to Load(String,DicomDataSetLoadFlags).

Remarks

If the Data Set is evaluated as a tree structure, this method returns the last item on the same level as element with the same parent as element. Please note that the numbering of the items in the following illustration is arbitrary and does not imply order.

If the passed object points to: The method returns an object pointing to:
Item 1 Item 2
Item 3 Item 4
Item 5 Item 5
Item 6 Item 7
null Item 2

If the Data Set is evaluated as a list, the last item in the list is returned. Please note that the numbering of the items in the following illustration does indicate the order of the items when the Data Set is evaluated as a list.

If the passed object points to: The method returns an object pointing to:
null Item 30
Item 12 Item 30
Item 14 Item 30
Item 22 Item 30
Item 25 Item 30

The following methods will also help you navigate the Data Set as either a tree or a list:

Leadtools.Dicom.DicomDataSet.GetFirstElement

Leadtools.Dicom.DicomDataSet.GetPreviousElement

Leadtools.Dicom.DicomDataSet.GetNextElement

If you evaluate the Data Set as a tree, you can also use the following methods to navigate the tree:

Leadtools.Dicom.DicomDataSet.GetRootElement

Leadtools.Dicom.DicomDataSet.GetParentElement

Leadtools.Dicom.DicomDataSet.GetChildElement

A volatile element is an element that can be changed or destroyed in the process of inserting or setting an image. A non-volatile element is an element that must be changed manually. It is not changed or destroyed by inserting or setting an image.

For example, a grayscale image has elements DicomTag.SmallestImagePixelValue, DicomTag.LargestImagePixelValue, etc. If the image is changed to a color image, these elements disappear and the following elements appear: DicomTag.RedPaletteColorLookupTableDescriptor, etc. These are volatile elements since they are changed or destroyed when an image is changed or set.

To retrieve the last element that must be changed manually, i.e., is not volatile, set volatile to false. To retrieve the first element, either volatile or non-volatile, set volatile to true.

Requirements

Target Platforms: Silverlight 3.0, Windows XP, Windows Server 2003 family, Windows Server 2008 family, Windows Vista, Windows 7, MAC OS/X (Intel Only)

See Also

Leadtools.Dicom requires a Medical toolkit server license and unlock key. For more information, refer to: Imaging Pro/Document/Medical Features