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FindLastKey(DicomElement,DicomDirKeyType,Boolean) Method
See Also 
Leadtools.Dicom Namespace > DicomDataSet Class > FindLastKey Method : FindLastKey(DicomElement,DicomDirKeyType,Boolean) Method



element
An item in the Data Set.
key
The type of key element to find.
tree
true to evaluate the Data Set as a tree; false to evaluate the Data Set as a list.
element
An item in the Data Set.
key
The type of key element to find.
tree
true to evaluate the Data Set as a tree; false to evaluate the Data Set as a list.
Returns the last item in the Dicom Dir Data Set with the specified key element type.

Syntax

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

Parameters

element
An item in the Data Set.
key
The type of key element to find.
tree
true to evaluate the Data Set as a tree; false to evaluate the Data Set as a list.

Return Value

The last item in the Data Set with the specified key element type, or a null reference (Nothing in Visual Basic) if an item with the specified key element type was not found.

Example

For an example, refer to Reset.

Remarks

For the sake of the following illustrations, the order of siblings is top to bottom. Therefore last is the item closest to the bottom.

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, that has has key element type key.

Please note that the numbering of the items of interest in this first illustration is arbitrary and does not imply order.

If the passed object points to:The method returns an object pointing to:
Item 1The last sibling (same level, same parent) of Item 1 that has has key element type key, if such an item exists. If such an item does not exist, the method returns null. Searching begins at the bottom.
Item 2The last sibling (same level, same parent) of Item 2 that has has key element type key, if such an item exists. If such an item does not exist, the method returns null. Searching begins at the bottom.
Item 3The last sibling (same level, same parent) of Item 3 that has has key element type key, if such an item exists. If such an item does not exist, the method returns null. Searching begins at the bottom.

If the Data Set is evaluated as a list, this method returns the last item in the entire list that has has key element type key. Searching begins at the bottom of the list.

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:
Item 1The last item in the list that has has key element type key, if such an item exists. If an item with key element type key is not found, null is returned. Searching begins at the bottom.
Item 14The last item in the list that has has key element type key, if such an item exists. If an item with key element type key is not found, null is returned. Searching begins at the bottom.
Item 22The last item in the list that has has key element type key, if such an item exists. If an item with key element type key is not found, null is returned. Searching begins at the bottom.

The following methods will also help you find elements in the Data Set with a specific key element type:

FindFirstKey

FindPreviousKey

FindNextKey

Requirements

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

See Also

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