gridView.OptionsView.ShowFooter = true;//啟用顯示頁腳
//索引為1的列
gridView.Columns[1].SummaryItem.DisplayFormat = "{0}";
gridView.Columns[1].SummaryItem.FieldName = "獎勵次數";//列對應的列名--"獎勵次數"
gridView.Columns[1].SummaryItem.SummaryType = DevExpress.Data.SummaryItemType.Sum;//求和
//索引為2的列
gridView.Columns[2].SummaryItem.DisplayFormat = "{0}";
gridView.Columns[2].SummaryItem.FieldName = "獎勵金額";//列對應的列名--"獎勵金額"
gridView.Columns[2].SummaryItem.SummaryType = DevExpress.Data.SummaryItemType.Sum;//求和
gridView.CustomDrawFooterCell += new FooterCellCustomDrawEventHandler(this.gridView_CustomDrawFooterCell);//設置一下對齊方式，通過GridView的CustomDrawFooterCell 事件

/// <summary>
/// 繪制頁腳時發生
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void gridView_CustomDrawFooterCell(object sender, FooterCellCustomDrawEventArgs e)
{
e.Appearance.TextOptions.HAlignment = DevExpress.Utils.HorzAlignment.Near;//左對齊
}

dev gridcontrol繪制頁腳