SendBackward(IEnumerable<Element>) Method

In This Topic

Send the elements backward within their parent's element collection. This method must be called on the MCT. Use QueuedTask.Run.

Syntax

C#
Visual Basic (Declaration)

public void SendBackward( 
   IEnumerable<Element> elements
)

Public Overloads Sub SendBackward( _
   ByVal elements As IEnumerable(Of Element) _
)

Parameters

elements: The elements to send backward

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
System.ArgumentException	elements must belong to layout 'URI'
System.ArgumentException	element parents must be the same and non-null

Remarks

Refer to CanSendBackward(IEnumerable<Element>) to check whether the elements can be sent backward. Element z order can only be changed relative to their parent's element collection. All elements must have the same parent. The bottom element will have a z order of 0 within the element parent's element collection. Check individual element z order with Element.ZOrder.

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

ArcGIS Pro version: 3 or higher.

Reference

Layout Class
Layout Members
Overload List

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