CanSendBackward(IEnumerable<Element>) Method

In This Topic

Checks whether the given elements can be moved back within their parent's element collection. This method must be called on the MCT. Use QueuedTask.Run.

Syntax

C#
Visual Basic (Declaration)

public bool CanSendBackward( 
   IEnumerable<Element> elements
)

Public Overloads Function CanSendBackward( _
   ByVal elements As IEnumerable(Of Element) _
) As Boolean

Parameters

elements: The elements to check

Return Value

True if the elements can be moved back.

Exceptions

Exception	Description
ArcGIS.Core.CalledOnWrongThreadException	This method or property must be called within the lambda passed to QueuedTask.Run.
System.ArgumentException	elements cannot be null or empty

Remarks

Element z order is relative to the element collection within their parent. The bottom element has a z order of 0. The top element has a z order of N - 1. All elements must have the same parent or false is returned. If any one of the elements is already at the bottom of their parent's element collection, false is returned. False can also be returned if any of the elements' z order cannot be checked (e.g. an element does not belong to the page layout, etc.).

Example

Ordering: Send backward and Bring forward

//On the QueuedTask
//get the current selection set
var sel_elems = layout.GetSelectedElements();
//can they be brought forward? This will also check that all elements have the same parent
if (layout.CanBringForward(sel_elems))
{
  //bring forward
  layout.BringForward(sel_elems);
  //bring to front (of parent)
  //graphicsLayer.BringToFront(sel_elems);
}
else if (layout.CanSendBackward(sel_elems))
{
  //send back
  layout.SendBackward(sel_elems);
  //send to the back (of parent)
  //graphicsLayer.SendToBack(sel_elems);
}

Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

Reference

Layout Class
Layout Members
Overload List

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