I am looking for an example for jqgrid subgrid with nested levels (4-5 levels) and can we display all the nested subgrids with out any headers and also by sharing the top level headers? Also is it possible to load all the subgrid data when the page is loaded…
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What you describes is practically the same what TreeGrid do. If it’s needed you can change the default icons used by TreeGrid using treeIcons option.
In the answer and this one are described how to load all the data of tree grid at once.