topic GraphicTracker Items no longer in collection in ArcObjects SDK Questions https://community.esri.com/t5/arcobjects-sdk-questions/graphictracker-items-no-longer-in-collection/m-p/290082#M7527 <HTML><HEAD></HEAD><BODY><SPAN>I am running into a problem where graphictracker items are being removed from the graphictracker collection without me specifically removing them, causing a Memory Access Violation exception and crashing my app.</SPAN><BR /><BR /><SPAN>I maintain a collection of IDs, call it "MyIDCollection", that are added to and removed in conjunction with adding and removing items from the GT collection.&nbsp; I make sure that the id is removed from MyIDCollection BEFORE I remove the item from the GT collection. And I make sure the item is added to the GTCollection before adding it to MyIDCollection, thus keeping the 2 collections in sync. I wish the GT class had a "Contains" method.</SPAN><BR /><BR /><SPAN>But occasionally when I call graphictracker.remove(id) I get either a 'Value not contained in collection' exception or a Memory Access Violation exception.</SPAN><BR /><BR /><SPAN>Has anyone seen this behavior before?</SPAN></BODY></HTML> Thu, 06 Oct 2011 16:48:16 GMT BillLanza 2011-10-06T16:48:16Z GraphicTracker Items no longer in collection https://community.esri.com/t5/arcobjects-sdk-questions/graphictracker-items-no-longer-in-collection/m-p/290082#M7527 <HTML><HEAD></HEAD><BODY><SPAN>I am running into a problem where graphictracker items are being removed from the graphictracker collection without me specifically removing them, causing a Memory Access Violation exception and crashing my app.</SPAN><BR /><BR /><SPAN>I maintain a collection of IDs, call it "MyIDCollection", that are added to and removed in conjunction with adding and removing items from the GT collection.&nbsp; I make sure that the id is removed from MyIDCollection BEFORE I remove the item from the GT collection. And I make sure the item is added to the GTCollection before adding it to MyIDCollection, thus keeping the 2 collections in sync. I wish the GT class had a "Contains" method.</SPAN><BR /><BR /><SPAN>But occasionally when I call graphictracker.remove(id) I get either a 'Value not contained in collection' exception or a Memory Access Violation exception.</SPAN><BR /><BR /><SPAN>Has anyone seen this behavior before?</SPAN></BODY></HTML> Thu, 06 Oct 2011 16:48:16 GMT https://community.esri.com/t5/arcobjects-sdk-questions/graphictracker-items-no-longer-in-collection/m-p/290082#M7527 BillLanza 2011-10-06T16:48:16Z