on this page in the release notes of jqgrid 3.7.2, i see:
Fix export url in export to excel method
but i dont see any other documention abou
There are method excelExport
in grid.import.js which do not really much. The function is not described on http://www.trirand.com/jqgridwiki/doku.php?id=wiki:import_methods but you can look at http://www.trirand.com/blog/?page_id=393/help/exceltrue-not-working-for-me/ to have a feeling how it work.
I also use ASP.NET MVC and WCF and make export to excel on the server side with respect of Open XML SDK 2.0 (see Creating Excel document with OpenXml sdk 2.0, how to export asp.net MVC detail view data to an excel file? or Strategy in exporting to Excel with formatting from ASP.NET?). Usage of Open XML SDK 2.0 gives you the most flexibility and you can produce a perfect Excel file which you need.
UPDATED: The answer provides demo project which shows how to implement the approach.