In jqGrid, can you double click a row to bring up the edit form?

It can be very simple implemented as

ondblClickRow: function(rowid) {
    jQuery(this).jqGrid('editGridRow', rowid);
}

you can also use any additional properties of editGridRow described in the documentation. For example

ondblClickRow: function(rowid) {
    jQuery(this).jqGrid('editGridRow', rowid,
                        {recreateForm:true,closeAfterEdit:true,
                         closeOnEscape:true,reloadAfterSubmit:false});
}

simple way

ondblClickRow : function(rowid) {
    $("#edit_mygridId").trigger("click");
}