Your example work perfectly in my demo system.

The only change that I have mage is this:

Note how this is written

Regards

Tony

I added sortname: "DoTime",

Using the latest version 3.7 bata, all the columns can not be sort.

Using the version 3.6.5,the problem is still.

Thanks.

Best Regards

Jerry

If you add

sortname: "Some valid from colmodel name"

you will not have a problem. The fix is in another position of the code.

Will try to test it.

Thanks.

Best Regards

Tony

you see i set the datatype:local

 loadComplete: function() {
            $("#InternetGrid").setGridParam({ datatype: 'local' });
        }

so i think is a bug

thanks

Best regards

jerry

The sorttype: 'int' have sense only if you use local data (i.e array) I think the problem is in you server side code.

Regards

Tony

$("#InternetGrid").jqGrid({
        url: '/PopularFeelCollect/ChildPage/Internet.aspx',
        datatype: "json",
        height: 340,
        colNames: ['类别', '关键词', '最新采集时间', '采集数量', '子系统采集'],
        colModel: [
            { name: 'DataType', index: 'DataType', width: '15%', sortable: false, align: 'center' },
            { name: 'KeyWords', index: 'KeyWords', width: '50%', sortable: false, align: 'left' },
            { name: 'DoTime', index: 'DoTime', width: '20%', align: 'center'},
            { name: 'DataCount', index: 'DataCount', width: '15%', align: 'center', sorttype: 'int' },
            { name: 'SiteCount', index: 'SiteCount', width: '0%', hidden: true,sortable: false}
        ],
        jsonReader: {
            repeatitems: false
        },
        loadui: 'block',
        viewrecords: true,
        autowidth: true,
        pagerpos: 'center',
        rowNum: 20,
        rowList: [10, 20, 30],
        pgtext: "第 {0} 页／共 {1} 页",
        recordtext: '第 {0} – {1} 条  å…± {2} 条',
        emptyrecords: '暂无记录',
        pager: "#InternetPager",
        onPaging: function(which_button) {
            $("#InternetGrid").setGridParam({ datatype: 'json' });
        },
        loadError: function(xhr, status, error) {
            alert(xhr.responseText);
        },
        loadComplete: function() {
            $("#InternetGrid").setGridParam({ datatype: 'local' });
        }
    }).jqGrid('navGrid', '#InternetPager', { search: false, edit: false, add: false, del: false });

but  after i  call this Methods 

$("#InternetGrid").setGridParam({ datatype: 'json', url: "/PopularFeelCollect/ChildPage/Internet.aspx?type=news", page: 1 }).trigger("reloadGrid");

click the 采集数量 to sort,i find it cann't sort by int.

but if i first click 最新采集时间 then click the 采集数量 it will be working well.

the json data