#region
        switch (e.Row.RowType)
        {
            case DataControlRowType.Header:
                //第一行表头
                TableCellCollection tcHeader = e.Row.Cells;
                tcHeader.Clear();
                tcHeader.Add(new TableHeaderCell());
                //tcHeader[0].Style = "font-family:@MS Gothic";
                tcHeader[0].Attributes.Add("rowspan", "3"); //跨Rowborder:1; ;
                //tcHeader[0].Attributes.Add("bgcolor", "white");
                tcHeader[0].Text = "社区";
                tcHeader[0].Style.Value = "border-bottom-color: #333333;border-right-color: #999999;height: 25px;font-family: \"宋体\";font-size: 12px;font-weight: bold;";
}
#endregion

------解决方案--------------------
switch (e.Row.RowType)
       {
           case DataControlRowType.Header:
               //第一行表头
               TableCellCollection tcHeader = e.Row.Cells;
               tcHeader.Clear();
               tcHeader.Add(new TableHeaderCell());
               //tcHeader[0].Style = "font-family:@MS Gothic";
               tcHeader[0].Attributes.Add("rowspan", "3"); //跨Rowborder:1; ;
               //tcHeader[0].Attributes.Add("bgcolor", "white");
               tcHeader[0].Text = "社区";
               tcHeader[0].Style.Value = "border-bottom-color: #333333;border-right-color: #999999;height: 25px;font-family: \"宋体\";font-size: 12px;font-weight: bold;";
}
RowsCreated事件中