topic Re: How to update Acreage field after edit the polygon's geometry? in ArcGIS API for Silverlight Questions

How to update Acreage field after edit the polygon's geometry?

weiliang — Tue, 15 Mar 2011 18:06:54 GMT

Hi,

I have an Acres filed for a polygon feature class. After I edit its vertices (which changes its geometry), I want the Acres field value could dynamically been updated. How can I reference the polygon in the code which is been selected to change the vertics?

I have similar problem of changing long/lat fields dynamically for the point data.

BTW, I know that I should use geometry service to calculate the area.

Thanks for your help in advance.

Wei

Re: How to update Acreage field after edit the polygon's geometry?

JenniferNery — Sat, 11 Dec 2021 16:52:00 GMT

Are you using Editor.EditVertices? If so, you can subscribe to Editor.EditCompleted event.

private void Editor_EditCompleted(object sender,Editor.EditEventArgs e)
{
 if (e.Action == Editor.EditAction.EditVertices)
 {
  foreach(var edit in e.Edits)
   //TODO: use this edit.Graphic
 }
}

If you are performing the geometry edit yourself, I imagine you are using some layer mouse events to get to select a graphic for editing.

private void FeatureLayer_MouseLeftButtonDown(object sender, GraphicMouseButtonEventArgs e)
{
 //TODO use e.Graphic
}

Re: How to update Acreage field after edit the polygon's geometry?

weiliang — Tue, 15 Mar 2011 23:58:31 GMT

Many thanks for your reply, Jennifer.

Have a great evening!

Wei