Sample code for Aras Innovator to get the keyed_names of all selected items in the main grid.

cui_printSelectedItemKeyedNames.js

var topWindow = aras.getMostTopWindowWithAras(window);
var workerFrame = topWindow.work;
var selectedIds = workerFrame.grid.getSelectedItemIds();
var itemTypeName = workerFrame.itemTypeName;

var selItems = aras.IomInnovator.newItem(itemTypeName, "get");
selItems.setAttribute("idlist", selectedIds.join(","));
selItems.setAttribute("select", "id,keyed_name");
selItems = selItems.apply();

// Return the keyed_names of all selected items
var res = "Selected " + aras.getItemProperty(workerFrame.currItemType, "label_plural") + ":\n";
for (var i = 0; i < selItems.getItemCount(); i++)
{
    var keyedName = selItems.getItemByIndex(i).getProperty("keyed_name");
    res = res + keyedName + "\n";
}

return alert(res);