Hello Greg,
You could find the selected rows in the master Grid via their CSS classes - k-master-row and k-state-selected.
E.g.
var grid = $("#grid").data("kendoGrid");var selected = grid.tbody.find("tr.k-master-row.k-state-selected");Then you could check if the next row for each of them has the k-detail-row CSS class. This will mean that the corresponding detail row has been expanded at least once.
E.g.
selected.each(function(e){ var nextRow = $(this).next("tr"); if(nextRow.hasClass("k-detail-row")){ var childGrid = nextRow.find(".k-grid").data("kendoGrid"); //access child Grid data }})Dimiter Madjarov
Telerik
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