ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Desktop.Layouts Namespace / Layout Class / GetPage Method
Example Version

GetPage Method
Gets the CIMPage for a layout. This method must be called on the MCT. Use QueuedTask.Run.
Syntax
public CIMPage GetPage()

Return Value

Exceptions
ExceptionDescription
This method must be called within the lambda passed to QueuedTask.Run.
Example
Layout_GetSetPage
//Modify a layouts page settings.

//Perform on the worker thread
await QueuedTask.Run(() =>
{

  CIMPage page = layout.GetPage();

  //Do something 

  layout.SetPage(page);
});
Change the layout page size
//Change the layout page size.

//Reference the layout project item
LayoutProjectItem lytItem = Project.Current.GetItems<LayoutProjectItem>()
                         .FirstOrDefault(item => item.Name.Equals("MyLayout"));
if (layoutItem != null)
{
  await QueuedTask.Run(() =>
  {
    //Get the layout
    Layout lyt = lytItem.GetLayout();
    if (lyt != null)
    {
      //Change properties
      CIMPage page = lyt.GetPage();
      page.Width = 8.5;
      page.Height = 11;

      //Apply the changes to the layout
      lyt.SetPage(page);
    }
  });
}
Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3 or higher.
See Also