protected void GridView1_RowCreated(object sender, GridViewRowEventArgs e)
{
switch (e.Row.RowType)
{
case DataControlRowType.Header:

            //总表头  
            TableCellCollection tcHeader = e.Row.Cells;  
            tcHeader.Clear();

            //第一行表头  
            tcHeader.Add(new TableHeaderCell());  
            tcHeader\[0\].Attributes.Add("bgcolor", "DarkSeaBlue");  
            tcHeader\[0\].Attributes.Add("colspan", "6");  //合并第一行的6列  
            tcHeader\[0\].Text = "用户基本信息</th></tr><tr>";

            //第二行表头  
            tcHeader.Add(new TableHeaderCell());  
            tcHeader\[1\].Attributes.Add("bgcolor", "DarkSeaGreen");  
            tcHeader\[1\].Attributes.Add("colspan", "3");  
            tcHeader\[1\].Text = "基本信息";

            tcHeader.Add(new TableHeaderCell());  
            tcHeader\[2\].Attributes.Add("bgcolor", "DarkSeaGreen");  
            tcHeader\[2\].Attributes.Add("colspan", "3");  
            tcHeader\[2\].Text = "籍贯信息</th></tr><tr>";

            //第三行表头  
            tcHeader.Add(new TableHeaderCell());  
            tcHeader\[3\].Attributes.Add("bgcolor", "Khaki");  
            tcHeader\[3\].Text = "公司";  
            tcHeader.Add(new TableHeaderCell());  
            tcHeader\[4\].Attributes.Add("bgcolor", "Khaki");  
            tcHeader\[4\].Text = "姓名";  
            tcHeader.Add(new TableHeaderCell());  
            tcHeader\[5\].Attributes.Add("bgcolor", "Khaki");  
            tcHeader\[5\].Text = "职衔";  
            tcHeader.Add(new TableHeaderCell());  
            tcHeader\[6\].Attributes.Add("bgcolor", "Khaki");  
            tcHeader\[6\].Text = "住址";  
            tcHeader.Add(new TableHeaderCell());  
            tcHeader\[7\].Attributes.Add("bgcolor", "Khaki");  
            tcHeader\[7\].Text = "城市";  
            tcHeader.Add(new TableHeaderCell());  
            tcHeader\[8\].Attributes.Add("bgcolor", "Khaki");  
            tcHeader\[8\].Text = "国籍";

            break;  
    }  
}

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"  
        CellPadding="4" DataSourceID="SqlDataSource1"  
        GridLines="Vertical" Width="927px" BackColor="White"  
        BorderColor="#DEDFDE" BorderStyle="None" BorderWidth="1px"  
        onrowcreated="GridView1\_RowCreated" ForeColor="Black">  
        <RowStyle BackColor="#F7F7DE" />  
        <Columns>  
            <asp:BoundField DataField="CompanyName" HeaderText="公司"  />  
            <asp:BoundField DataField="ContactName" HeaderText="姓名"  />  
            <asp:BoundField DataField="ContactTitle" HeaderText="职衔"  />  
            <asp:BoundField DataField="Address" HeaderText="住址"  />  
            <asp:BoundField DataField="City" HeaderText="居住地" />  
            <asp:BoundField DataField="Country" HeaderText="国籍"  
                SortExpression="Country" />  
        </Columns>  
        <FooterStyle BackColor="#CCCC99" />  
        <PagerStyle BackColor="#F7F7DE" ForeColor="Black" HorizontalAlign="Right" />  
        <SelectedRowStyle BackColor="#CE5D5A" Font-Bold="True" ForeColor="White" />  
        <HeaderStyle BackColor="#6B696B" Font-Bold="True" ForeColor="White" />  
        <AlternatingRowStyle BackColor="White" />  
    </asp:GridView>  
    <asp:SqlDataSource ID="SqlDataSource1" runat="server"  
        ConnectionString="<%$ ConnectionStrings:NorthwindConnectionString %>"  
        SelectCommand="SELECT \[CompanyName\], \[ContactName\], \[ContactTitle\], \[Address\], \[City\], \[Country\] FROM \[Customers\]">  
    </asp:SqlDataSource>