Nikolay,

here is what's happening. We are trying to use version less dlls as we have a lot of ultrawebgrids on our site and as of now we are taking only one of these to see how it performs before we move over to 11.2 version where ultrawebgrid is no longer supported. As soon as i try to page on the child grid i see that it hits the RowIslandPopulating (which it shouldnt) and then gives this error.We are getting the parent and the child from datsets and trying to do manual load on demand. here is a sample snippet. Please let me know if there is anything different I should do. Or rather a working sample of any childbehaviours enabled for datsets with manual LOD would be helpful.

protected void myGrid_RowIslandsPopulating(object sender, Infragistics.Web.UI.GridControls.ContainerRowCancelEventArgs e)  

{    

//Cancel the default automatic load on demand operation  

 e.Cancel = true;  

BindSecondLevel(e);

}

 private void BindSecondLevel(Infragistics.Web.UI.GridControls.ContainerRowCancelEventArgs e)        

 {

 DataSet ds = new DataSet();  

int myId = Int32.Parse(e.Row.Items.FindItemByKey("IdColumn").Value.ToString());

ds = GeDataTableByChild(myId);  

// Create Container Grid  

ContainerGrid childGrid = new ContainerGrid();          

BoundDataField myAddress = new BoundDataField();

            myAddress .DataFieldName ="Address";

            myAddress.Key ="AddressColumn";

            myAddress.Header.Text ="Address";

BoundDataField name = new BoundDataField();

            name.DataFieldName ="Name";

            name.Key ="NameColumn";

            name.Header.Text ="Name";

childGrid.Columns.Add(name);

  childGrid.Columns.Add(myAddress);

  childGrid.DataMember = "Child";

childGrid.Level = 1;   childGrid.DataKeyFields = "MyAddress";

childGrid.DataSource = ds;

childGrid.Behaviors.CreateBehavior<Infragistics.Web.UI.GridControls.Paging>();

childGrid.Behaviors.Paging.Enabled = true;

childGrid.Behaviors.Paging.PagerMode = Infragistics.Web.UI.GridControls.PagerMode.Numeric;

childGrid.Behaviors.Paging.PageSize = 10;     // childGrid.DataBind();  

}

Hello dev_here,

If you have any further questions, please feel free to contact me.