javascript - Can trigger(“reloadGrid”) works when 'loadonce: true' in jqGrid? -

the jqgrid source file i'm using says @ top it's version jqgrid 4.4.0 , date date 2012-06-14

in wiki page says trigger(“reloadgrid”),

reloads grid current settings. means new request send server if datatype xml or json. method should applied already-constructed grid. pay attention method not change header information, means changes colmodel not affected. should use gridunload reload new configuration different colmodel. it's work if loadonce: false !!!

and yes says "it's work if loadonce: false !!!"

and this answer suggest hack that. says,

if use loadonce:true jqgrid change datatype parameters 'local' after first load of data grid. next grid reloading (sorting, paging, filtering) works local. if want refresh grid data server 1 more time should set datatype original value ('json' or 'xml').

so answer solved problem facing. had jqgrid has loadonce:true. (here care sorting , worked perfectly). had change code bit reload jqgrid new server data. (user can change details , refresh table jqgrid should reload newly aquired data server). unfortunately didn't work until changed loadonce:true loadonce:false.

i called reloading this,

$("#tablegrid").setgridparam({url:'myurl'}).trigger('reloadgrid'); 

now reloading fine. sorting gone :(

and saw answer , change this,

i set loadonce:true when initializing grid. , called reloading below.

$("#tablegrid").setgridparam({url:'myurl',datatype:'xml'}).trigger('reloadgrid'); 

after sorting fine , user can reload grid well.

is approach correct ? think solved problem, but ? because documentation says can't reload when loadonce:true ?

first of strictly recommend upgrade jqgrid use version 4.4.0 free jqgrid 4.12.1. free jqgrid fork of jqgrid develop starting end of 2014. see post , link updated part of the answer additional information. should understand jqgrid 4.4.0 retro version. published @ time of jquery 1.4.3 version. time when ie9 latest version of internet explorer, ie6-ie8 used versions. have another time in web development.

it's important understand loadonce: true , .trigger('reloadgrid').

jqgrid support local holding of data inside of javascript objects. 1 can use datatype: "local", provides data using data parameter , work data using local paging, sorting , filtering data. can change values of page size (rownum), page number (page) , sorting parameters (sortname, sortorder) , reload current displayed page using new options triggering reloadgrid event. jqgrid sort data , displays requested page. it's important understand .trigger('reloadgrid') works local data too.

if use datatype:'xml' loadonce: true server have return all data. data have sorted requested sortname, sortorder options (the parameters sidx , sord of request server). jqgrid fills internal data parameter data. jqgrid displays first page of returned data (based on page size rownum , page number page). (after processing loadcomplete callback) jqgrid changes original value of datatype ("xml" in case) datatype: "local". user can use local paging, sorting , filtering data without communication server. on every sorting, paging , filtering jqgrid uses reloadgrid event display corresponding page of data.

if need reload data server need restore original value of datatype parameter , trigger reloadgrid. example

$("#tablegrid").setgridparam({datatype:'xml'}).trigger('reloadgrid'); 

if server correctly implemented user see requested page of data , local data refreshed. datatype changed datatype:'local' after displaying page.

if use current free jqgrid can use following options

loadonce: true, forceclientsorting: true, navoptions: { reloadgridoptions: { fromserver: true } } 

the option forceclientsorting: true removes server requirement provide sorted data. free jqgrid can sort data returned server. if use navgrid adds "refresh"/"reload" button. option navoptions: { reloadgridoptions: { fromserver: true } } changes behavior of button so, data reloaded server if user clicks on button. no manual changing of datatype not needed.