My treeview is bound to a dataset. Moving a single node with no children works fine.
moving a node that has children, generate the itemMoved event, then before the page_load event i gets the following error.
I moved your demo drag and drop with reording onto the same page, and it works fine.
it seems to be when bound to a data set?
using version 5.0.43.2

Server Error in '/ESTreeControl' Application.

---

Object reference not set to an instance of an object.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:


[NullReferenceException: Object reference not set to an instance of an object.]
EO.Web.NavigationItem.f() +451
EO.Web.NavigationItem.f() +258
EO.Web.NavigationItem.f() +258
EO.Web.NavigationItem.f() +258
EO.Web.BaseNavigator.a(Object A_0) +49
System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +186
System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +136
System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +224
System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +136
System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +224
System.Web.UI.Page.LoadAllState() +439
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1092



http://localhost:2536/ESTreeControl/Default.aspx

i can zip up this project...and send it to you...
never done this, where do you want it sent?

I have also noticed this.

If I use the code you supplied to generate a dataset.........

***************************************************************
Dim table As DataTable = ds.Tables.Add("Folders")
Dim folderID As DataColumn = _
table.Columns.Add("FolderID", GetType(Integer))
Dim parentFolderID As DataColumn = _
table.Columns.Add("ParentFolderID", GetType(Integer))
Dim folderName As DataColumn = _
table.Columns.Add("FolderName", GetType(String))
table.Rows.Add(New Object() {1, Nothing, "Root"})
table.Rows.Add(New Object() {2, 1, "My Documents"})
table.Rows.Add(New Object() {3, 1, "Windows"})
table.Rows.Add(New Object() {4, 3, "System32"})
table.Rows.Add(New Object() {5, 3, "Temp"})

'Define relations

Dim r As DataRelation = ds.Relations.Add(folderID, parentFolderID)
r.Nested = True

*****************************************************************

Then I bind this to the treeview and turn on "AllowDragDrop" and "AllowDragReordering" and also put "RaiseServerEvent" to true when I attempt to reorder the children of the Root then I get the following error "Object Reference not set to an instance of an object".

I am using VS2008.

Thanks

Where do we stand on this issue?

I did not send you an email, I think that was BQuick. I used your code (in above message) and received a similar error. Anyways I guess the latest build fixes the problem, I will download it and give it a try.

Thanks!

Sorry i did not get back to you sooner, but the fix works great...Problem sovled