Hi,

I just looked into the IsEmptyParent, but I'm not sure what you're suggesting to do with it. Which method do you suggest for getting just the records I need?  I really like the idea of altering the sql selectcommand in the rowislanddatabinding event.  I need to get my key field from the parent row which I can't seem to get.  I tried using e.RowIsland.ParentRow but it's always nothing in the rowislanddatabinding event.

Thanks, Ed

Thanks for the reply.  I will get to testing this in depth over the weekend.

Ed

The example in the help file for manually populating the island in the RowIslandsPopulating event looks like the following:

// Create Container Grid
ContainerGrid childGrid = new ContainerGrid();
e.Row.RowIslands.Add(childGrid);

// Bind Grid
childGrid.DataSource = products;
childGrid.DataBind();

Instead of creating a new ContainerGrid, can I somehow use an 

existing band and bind to that instead in the 

RowIslandsPopulating event? 

<Bands>
   <ig:Band AutoGenerateColumns="false" Key="TXN" >
     <Columns>
       <ig:BoundDataField DataFieldName="TXN_CD" Key="TXN_CD" 

Header-Text="Transaction Code" />                                            
       <ig:BoundDataField DataFieldName="ISSUED_DT" Key="ISSUED_DT" 

Header-Text="Issue Date"/>
     </Columns>
   </ig:Band>
</Bands>     

I found that you can do something like this

        ContainerGrid childGrid = new ContainerGrid();
        childGrid.Band = WebHierarchicalDataGrid1.Bands[0];
        e.Row.RowIslands.Add(childGrid);

if you have an existing band declared in markup, athough it gives me a casting error if I try and expand multiple bands at a time.

I've been playing around with this, and had one large problem - something is missing when you create a new containerGrid - when any cells in the new rows are updated there is a "not implemented" error on the client side (the update may or may not go through). Something appears to be not quite linked between the containerGrid bound server side and the requirements of the grid client side to save (despite it working fine when everything was bound using only the default "getAll" queries)

Any ideas?

I also notice that the grid internally still calls the default "getall" query in the hierarchical data markup on the page, sometime MULTIPLE times before it then calls the RowIslandsPopulating event server side. While I commented out the sever side ftn so it didn't return any rows, it is a concern - no wonder it runs slowly.

I am having problems as well with perfomance and editing. I found that when I am using the LoadOnDemand whith no DataSources in markup and creating everything inside RowIslandsPopulating this does solve the multiple "getAll" queries.

My problem comes in when I try and do an update inside a child row, are you doing updates in a child or parent row?

I get an "Object reference not set to an instance of an object" ......

Any thoughts on this?