ExtJS 2.2.1 实现双表头动态列

{
    xtype : ‘filtergrid‘,
    id : ‘grid1‘,
    cm : new Ext.grid.ColumnModel({
        columns : [{
            header: ‘列1‘,
            id: ‘col1‘,
            dataIndex: ‘col1‘,
            width : 100
        }, {
            header: ‘列2‘,
            id: ‘col2‘,
            dataIndex: ‘col2‘,
            width : 100
        }, {
            header: ‘列3-1‘,
            id: ‘col31‘,
            dataIndex: ‘col31‘,
            width : 100
        }, {
            header: ‘列3-2‘,
            id: ‘col32‘,
            dataIndex: ‘col22‘,
            width : 100
        }, {
            header: ‘列3-3‘,
            id: ‘col33‘,
            dataIndex: ‘col33‘,
            width : 100
        }],
        headerRowsEx : [[{
            dataIndex : ‘col1‘,
            rowspan : 2
        }, {
            dataIndex : ‘col2‘,
            rowspan : 2
        }, {
            id : ‘col3Header‘,
            header : ‘列3‘，
            colspan : 3,
            width : 300
        }], [{
            header : ‘列1‘
        }, {
            header : ‘列2‘
        }, {
            dataIndex : ‘col31‘,
            columnIdRef : [‘col3Header‘]
        }, {
            dataIndex : ‘col32‘,
            columnIdRef : [‘col3Header‘]
        }, {
            dataIndex : ‘col33‘,
            columnIdRef : [‘col3Header‘]
        }]]
    }),
    filters : new Ext.ux.GridFilters({
        filters : [{
            ......
        }, {
            ......
        }]
    }),
    store : ...,
    listeners : ...
},

initialize : function(param) {
    var grid = Ext.getCmp(‘grid1‘);
    var cm = grid.getColumnModel();
    cm.setHidden(cm.findColumnIndex(‘col33‘), true);

    //  查找列的Index
    //cm.findColumnIndex(‘col33‘);
    // 单元格背景色设置
    // grid.getView().getCell(i, j).style.backgroundColor = "gray";
}

原文地址：http://blog.51cto.com/13685327/2352191