[Invalid Operation Exception: The List View 'lvw Data' raised event Item Editing which wasn't handled.] System. On Item Editing(List View Edit Event Args e) 305573 System. Basically the raised event was performing data validation for the List Item being updated.Edit Form Scenario: The Item Updating event worked without a hitch.Do you absolutely need to do something Asynchronous? If so, indeed the best way to do it is to add a hidden bit column, or an int column if you want to cheaply store changed flags for several columns.
The Item Updating logic needs to compare various dates and number fields to determine if the data could be submitted.
protected void Page_Load(object sender, Event Args e) protected void Page_Pre Render(object sender, Event Args e) /* so we have the ID of the document we're deleting later on */ protected void my Docs List_Item Data Bound(object sender, List View Item Event Args e) /* or we get "raised event Item Deleting which wasn't handled" */ protected void my Docs List_Item Deleting(Object sender, List View Delete Event Args e) /* do something here?
*/ //protected void my Docs List_Item Deleted(Object sender, // List View Deleted Event Args e) // protected void my Docs List_Item Command(object sender, List View Command Event Args e) I've been reading up on the ASP page lifecycle and a few related questions, but I'm reasonably inexperienced with ASP and a bit lost.
Edit: Code Behind Protected Sub Page_Load(By Val sender As Object, By Val e As System. Load If Not Is Post Back Then Update Display() End If End Sub Protected Sub Update Distplay() List View.
This page is a great reference for Form View controller: View Update: I've updated code to refelct Phaedrus suggestion. Try removing this line of code and let me know if it resolved your issue.