asp.net mvc 4 - Rendering partial view to string in MVC4 -

i need export partial view contents excel sheet. view contains decimal values, , after export decimal values rounded nearest values. how avoid rounding of decimal , export is?

below code have written render partial view string.

    protected string renderpartialviewtostring(string viewname, object model)     {         if (string.isnullorempty(viewname))             viewname = controllercontext.routedata.getrequiredstring("action");         viewdata.model = model;         using (stringwriter sw = new stringwriter())         {             viewengineresult viewresult = viewengines.engines.findpartialview(controllercontext, viewname);             viewcontext viewcontext = new viewcontext(controllercontext, viewresult.view, viewdata, tempdata, sw);             viewresult.view.render(viewcontext, sw);             return sw.getstringbuilder().tostring();         }     } 

if view returned value, rounded.

and calling function

string str = renderpartialviewtostring("mypartialview", objmodel);

below piece of code call above said method

        using (streamwriter outfile = new streamwriter(pathfile))         {             outfile.write(str);         }         microsoft.office.interop.excel.application xlapp = new microsoft.office.interop.excel.application();         microsoft.office.interop.excel.workbook xlworkbook = xlapp.workbooks.open(pathfile,             system.reflection.missing.value, system.reflection.missing.value, system.reflection.missing.value,             system.reflection.missing.value,                system.reflection.missing.value, system.reflection.missing.value,                system.reflection.missing.value, system.reflection.missing.value, system.reflection.missing.value,                system.reflection.missing.value, system.reflection.missing.value, system.reflection.missing.value,                system.reflection.missing.value, system.reflection.missing.value);         microsoft.office.interop.excel.worksheet xlworksheet = (worksheet)xlworkbook.worksheets[1];         xlworkbook.saveas(filename, microsoft.office.interop.excel.xlfileformat.xlworkbookdefault,             type.missing, type.missing, true, false, xlsaveasaccessmode.xlnochange,             xlsaveconflictresolution.xllocalsessionchanges, type.missing, type.missing);         xlworkbook.close();         system.io.file.delete(pathfile);         xlapp.quit();