Refresh Method (Item)

In This Topic

Refreshes the collection of children. Use IsMainThreadRequired to determine the correct thread for performing a refresh.

Syntax

C#
Visual Basic (Declaration)

public void Refresh()

Public Sub Refresh()

Exceptions

Exception	Description
ArcGIS.Core.CalledOnWrongThreadException	This method or property must be called within the lambda passed to QueuedTask.Run.

Remarks

Certain Items must be refreshed on the MCT. Use IsMainThreadRequired to check. A true return value means the item must be refreshed on the MCT using QueuedTask.Run. SDE Items, for example, must be refreshed on the MCT. A false return value means the Item can be refreshed on any thread, including the UI, although using ArcGIS.Core.Threading.Tasks.BackgroundTask is preferred.
Calling Refresh on the wrong thread for items where IsMainThreadRequired returns true will throw a ArcGIS.Core.CalledOnWrongThreadException.

Example

Refresh the child item for a folder connection Item

var contentItem = Project.Current.GetItems<FolderConnectionProjectItem>().First();
//var contentItem = ...
//Check if the MCT is required for Refresh()
if (contentItem.IsMainThreadRequired)
{
  //QueuedTask.Run must be used if item.IsMainThreadRequired
  //returns true
  QueuedTask.Run(() => contentItem.Refresh());
}
else
{
  //if item.IsMainThreadRequired returns false, any
  //thread can be used to invoke Refresh(), though
  //BackgroundTask is preferred.
  contentItem.Refresh();

  //Or, via BackgroundTask
  ArcGIS.Core.Threading.Tasks.BackgroundTask.Run(() =>
    contentItem.Refresh(), ArcGIS.Core.Threading.Tasks.BackgroundProgressor.None);
}

Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

Reference

Item Class
Item Members

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