Hide Expand on ServerOnDemand Grid?

[Fred]

I've searched and looked up on how to hide Expand/Collapse but seems to only work if you already have all the data.

there a way to do it with ServerOnDemand loading? 

If I try this http://www.telerik.com/help/aspnet/grid/grdhideexpandcollapseimageswhennorecords.html

All the expand/collapse buttons go away. I'm assuming because the grid doesn't know if the row has child items or not. I have a dataset with three tables loaded already, there a way to check to see if each row will have child items and then hide/show the expand?

[Yavor]

Hello Fred,

Basically, the approach in question relies on a check on the presence of detail records, when hiding the expand collapse images. Since you are using server on demand, there is no child records at this time. Hence the issue.
You have two possible options to work-around this.
First, you can allow the child levels to be populated.
Alternatively, you can query the database, to determine if a given record would have child records. then, you can hide the expand/collapse image based on this information.
I hope one of these options is suitable for you.

Regards,
Yavor
the Telerik team

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[Bob]

I am using a three level hierarchical RadGrid and have this issue.

Using the second option "Alternatively, you can query the database, to determine if a given record would have child records. then, you can hide the expand/collapse image based on this information." could you explain where to do the check and how exactly to hide the image, .ColumnCreating, ColumnCreated. DataBind?

Thanks in advance.

[Iana Tsolova]

Hi Bob,

You can handle the ItemDataBound event for that purpose. If fires for each GridItem when it is bound. Thus if the current item is GridDataItem of the MasterTableView, you can get the desired information from it to query the database and see if there are child records for it. Here you can also hide the expand button.
For more information, check the below articles:
http://www.telerik.com/help/aspnet-ajax/grdaccessingcellsandrows.html
http://www.telerik.com/help/aspnet-ajax/grddistinguishgridrowsinhierarchyonitemdatabound.html
http://www.telerik.com/help/aspnet-ajax/grdhideexpandcollapseimageswhennorecords.html 

All the best,
Iana
the Telerik team