- 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.
Syntax
| Visual Basic (Declaration) | |
|---|---|
Public Function FindPreviousElement( _ ByVal element As DicomElement, _ ByVal tree As Boolean _ ) As DicomElement | |
| Visual Basic (Usage) |  Copy Code |
|---|---|
Dim instance As DicomDataSet Dim element As DicomElement Dim tree As Boolean Dim value As DicomElement value = instance.FindPreviousElement(element, tree) | |
| C# | |
|---|---|
public DicomElement FindPreviousElement( DicomElement element, bool tree ) | |
| C++/CLI | |
|---|---|
public: DicomElement^ FindPreviousElement( 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 previous item in the Data Set with a specified Tag, or a null reference (Nothing in Visual Basic) if a previous item with the specified Tag was not found.Example
Remarks
For the sake of the following illustrations, the order of siblings is top to bottom.
If the Data Set is evaluated as a tree structure, this method returns the previous item on the same level as element, with the same parent as element, that has Tag tag.
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 1 | The previous sibling (same level, same parent) of Item 1 that has Tag tag, if such an item exists. If such an item does not exist, the method returns null. |
| Item 2 | The previous sibling (same level, same parent) of Item 2 that has Tag tag, if such an item exists. If such an item does not exist, the method returns null. |
| Item 3 | The previous sibling (same level, same parent) of Item 3 that has Tag tag, if such an item exists. If such an item does not exist, the method returns null. |
If the Data Set is evaluated as a list, this method returns the previous item in the entire list that has Tag tag.
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 1 | The previous item in the list that has Tag tag, if such an item exists. If an item with Tag tag is not found, null is returned. |
| Item 14 | The previous item in the list that has Tag tag, if such an item exists. If an item with Tag tag is not found, null is returned. |
| Item 22 | The previous item in the list that has Tag tag, if such an item exists. If an item with Tag tag is not found, null is returned. |
The following methods will also help you find elements in the Data Set with a specific Tag:
Leadtools.Dicom.DicomDataSet.FindLastElement
Leadtools.Dicom.DicomDataSet.FindNextElement
The following methods will help you find specific modules in the Data Set:
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)