Ext.Net1.x_Ext.Net.GridPanel合并列头与动态修改列头

合并表头：

动态修改列头：

    private void ReSetColumnHeader(GridPanel GP) 
    {
        string year = System.DateTime.Now.Year.ToString();
        string last = (System.DateTime.Now.Year -1).ToString();
        this.GPSales.ColumnModel.SetColumnHeader(2, last);
        this.GPSales.ColumnModel.SetColumnHeader(3, year);
        this.GPSales.ColumnModel.SetColumnHeader(4, last);
        this.GPSales.ColumnModel.SetColumnHeader(5, year);
        this.GPSales.ColumnModel.SetColumnHeader(6, last);
        this.GPSales.ColumnModel.SetColumnHeader(7, year);
        this.GPSales.ColumnModel.SetColumnHeader(8, last);
        this.GPSales.ColumnModel.SetColumnHeader(9, year);
        this.GPSales.ColumnModel.SetColumnHeader(10, last);
        this.GPSales.ColumnModel.SetColumnHeader(11, year);
        this.GPSales.ColumnModel.SetColumnHeader(12, last);
        this.GPSales.ColumnModel.SetColumnHeader(13, year);
        this.GPSales.ColumnModel.SetColumnHeader(14, last);
        this.GPSales.ColumnModel.SetColumnHeader(15, year);
        this.GPSales.ColumnModel.SetColumnHeader(16, last);
        this.GPSales.ColumnModel.SetColumnHeader(17, year);
        this.GPSales.ColumnModel.SetColumnHeader(18, last);
        this.GPSales.ColumnModel.SetColumnHeader(19, year);
        this.GPSales.ColumnModel.SetColumnHeader(20, last);
        this.GPSales.ColumnModel.SetColumnHeader(21, year);
        this.GPSales.ColumnModel.SetColumnHeader(22, last);
        this.GPSales.ColumnModel.SetColumnHeader(23, year);
        this.GPSales.ColumnModel.SetColumnHeader(24, last);
        this.GPSales.ColumnModel.SetColumnHeader(25, year);
    }

效果：