What you can do for example is getting the reference to internal parameter using getGridParam. Then you can either assign the new value mydata2 to the data. Alternatively you can assign it first to empty array and then you can use setGridParam method in the same way like you already do it.

Best regards
Oleg 

Hello, 

I have my two variable

my variable mydata1 have 30 rows 

my variable mydata2 have 5 rows

 And I want to switch these two data in my default jqGrid option. Actuallay default options are:

datatype: 'local',

data: mydata1

but When I try to change data(with a click event) by another variable mydata2 who have 5 rows… In the GRID just 5 first rows are changing…the rest are always there…. Why there is this reaction  please ? I need to change data completly… 

This is click event:

$('.changeDate').click(function() {

grid.setGridParam({

datatype : 'local',

data : mydata2

}).trigger("reloadGrid");

});