JQGrid hide column and sorting in grouping - asp.net-mvc-3

Question

I have tried hidden: true, width: 0, display: false but still I see the column in the grid. Than I tried
myGrid.jqGrid('hideCol', ["Type"]);
issue 1:
which is working and column is hidden but once I show collapsed rows than this column is again visible.
issue 2:
I have groupCollapse: true . When I uncollapse and do the sorting than all the rows collapsed again.
Problem:
Collapse/UnCollapse the hidden column shouldn't visible.
When sorting rows collapse.
var myGrid = $('#list');
myGrid.jqGrid({
url: '/Admin/DynamicGridData/',
datatype: 'json',
mtype: 'POST',
colNames: ['Id', 'Date', 'First Name', 'Last Name', 'Email Address', 'Hidden'],
colModel: [
{ name: 'Id', index: 'Id', width: 40, align: "center", editable: false, editoptions: { readonly: true }, key: true, sorttype: "int", searchoptions: { sopt: ['eq', 'ne', 'lt', 'le', 'gt', 'ge']} },
{ name: 'DateEdited', index: 'DateEdited', width: 90, sorttype: "date", formatter: "date" },
{ name: 'FirstName', index: 'FirstName', width: 120, searchoptions: { sopt: ['eq', 'ne', 'lt', 'le', 'gt', 'ge']} },
{ name: 'LastName', index: 'LastName', width: 120, searchoptions: { sopt: ['eq', 'ne', 'lt', 'le', 'gt', 'ge']} },
{ name: 'Email', index: 'Email', width: 300, searchoptions: { sopt: ['cn', 'nc', 'bw', 'bn', 'eq', 'ne', 'ew', 'en', 'lt', 'le', 'gt', 'ge']} },
{ name: 'Type', index: 'Type', hidden: true, width: 0, display: false, search: false }
],
height: 'auto',
autowidth: true,
rownumbers: true,
rowNum: 30,
rowList: [10, 20, 30],
pager: '#pager',
sortname: 'Id',
viewrecords: true,
sortorder: "asc",
multiselect: true,
altRows: true,
altclass: 'myAltRowClass',
caption: "Master Grid",
jsonReader: { cell: "" },
grouping: true,
groupingView: { groupField: ['Type'],
groupColumnShow: [true],
groupText: ['<b>{0} - {1} Record(s)</b>'],
groupCollapse: false,
groupOrder: ['desc']
}
});
myGrid.jqGrid('navGrid', '#pager', { add: false, edit: false, del: true }, {}, {},
{ },
{ multipleSearch: true, overlay: false });
myGrid.jqGrid('filterToolbar', { stringResult: true, searchOnEnter: true, defaultSearch: 'cn' });
myGrid.jqGrid('navButtonAdd', '#pager', { caption: "Filter", title: "Toggle Searching Toolbar", buttonicon: 'ui-icon-pin-s', onClickButton: function () { myGrid[0].toggleToolbar(); } });
myGrid[0].toggleToolbar();
myGrid.jqGrid('hideCol', ["Type"]);

Answer 1

You can use either
myGrid.jqGrid('hideCol', "Type");
instead of myGrid.jqGrid('hideCol', ["Type"]); or use
groupColumnShow: [false]
instead of groupColumnShow: [true] because you want hide the column on which you do grouping.