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GetFirstKey Method
Summary
Returns the first item in the Dicom Dir Data Set.
Syntax
public Leadtools.Dicom.DicomElement GetFirstKey(Leadtools.Dicom.DicomElement element,bool tree)
Public Function GetFirstKey( _ByVal element As Leadtools.Dicom.DicomElement, _ByVal tree As Boolean _) As Leadtools.Dicom.DicomElement
public Leadtools.Dicom.DicomElement GetFirstKey(Leadtools.Dicom.DicomElement element,bool tree)
public DicomElement getFirstKey(DicomElement element, boolean tree) function Leadtools.Dicom.DicomDataSet.GetFirstKey(element ,tree)
public:Leadtools.Dicom.DicomElement^ GetFirstKey(Leadtools.Dicom.DicomElement^ element,bool tree)
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.
Return Value
The first item in the Data Set, or a null reference (Nothing in VB) if the Data Set is empty.
Remarks
If the Data Set is evaluated as a tree structure, this method returns the first item on the same level as element with the same parent as element. Please note that the numbering of the items 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 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 first 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 1 |
| Item 12 | Item 1 |
| Item 14 | Item 1 |
| Item 22 | Item 1 |
| Item 25 | Item 1 |
The following methods will also help you navigate the Data Set as either a tree or a list:
If you evaluate the Data Set as a tree, you can also use the following methods to navigate the tree:
Example
For an example, refer to Reset.
Requirements
See Also
Reference
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© 1991-2017 LEAD Technologies, Inc. All Rights Reserved.
Leadtools.Dicom Assembly
