Gridview多级复杂表头

设计GridView多级复杂表头，在实现过程中有几个问题：

1、如何控制表头中字体颜色、背景色的控制

2、C#中也有VB中IIF的写法：

newRow["1Rev"] = String.IsNullOrEmpty(strRev[1]) ? "" : String.Format("{0:#,##0}", Convert.ToDouble(strRev[1]));

3、可以给字符串付空值：string myString = null;

4、判断SQL查询字段是否为null，可以使用：myrow[0] == System.DBNull.Value 为true？

5、Convert.ToString(myrow[0])，如果myrow[0]为空，返回""。

6、从ASP.NET编程之道上抄来的例子：

后台View Code

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class GridviewMultiHeader : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }

    protected void GridView1_RowCreated(object sender, GridViewRowEventArgs e)
    {
        switch (e.Row.RowType)
        {
            case DataControlRowType.Header://被创建的行是标题行
                TableCellCollection tcHeader = e.Row.Cells;//取得标题行的单元格集合
                tcHeader.Clear();//清空标题行的单元格集合
                //添加一级表头
                tcHeader.Add(new TableHeaderCell());
                tcHeader[0].Attributes.Add("rowspan", "3"); //跨3行
                tcHeader[0].Attributes.Add("bgcolor", "white");
                tcHeader[0].Text = "盘点期间";
                tcHeader.Add(new TableHeaderCell());
                tcHeader[1].Attributes.Add("colspan", "6"); //跨6列
                tcHeader[1].Text = "全部信息</th></tr><tr>";
                //添加二级表头
                tcHeader.Add(new TableHeaderCell());
                tcHeader[2].Attributes.Add("bgcolor", "DarkSeaGreen");
                tcHeader[2].Text = "仓库信息";
                tcHeader.Add(new TableHeaderCell());
                tcHeader[3].Attributes.Add("bgcolor", "LightSteelBlue");
                tcHeader[3].Attributes.Add("colspan", "3");//跨3列
                tcHeader[3].Text = "商品信息";
                tcHeader.Add(new TableHeaderCell());
                tcHeader[4].Attributes.Add("bgcolor", "LightSteelBlue");
                tcHeader[4].Attributes.Add("colspan", "2");//跨2列
                tcHeader[4].Text = "盘点信息</th></tr><tr>";
                //添加三级表头
                tcHeader.Add(new TableHeaderCell());
                tcHeader[5].Attributes.Add("bgcolor", "Khaki");
                tcHeader[5].Text = "仓库名称";
                tcHeader.Add(new TableHeaderCell());
                tcHeader[6].Attributes.Add("bgcolor", "Khaki");
                tcHeader[6].Text = "商品名称";
                tcHeader.Add(new TableHeaderCell());
                tcHeader[7].Attributes.Add("bgcolor", "Khaki");
                tcHeader[7].Text = "规格";
                tcHeader.Add(new TableHeaderCell());
                tcHeader[8].Attributes.Add("bgcolor", "Khaki");
                tcHeader[8].Text = "数量";
                tcHeader.Add(new TableHeaderCell());
                tcHeader[9].Attributes.Add("bgcolor", "Khaki");
                tcHeader[9].Text = "盘点数";
                tcHeader.Add(new TableHeaderCell());
                tcHeader[10].Attributes.Add("bgcolor", "Khaki");
                tcHeader[10].Text = "盘点说明";
                break;
        }
    }
}

前台View Code

    <form id="form1" runat="server">
    <div>
        <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" 
            DataSourceID="SqlDataSource1" EmptyDataText="没有可显示的数据记录。" 
            onrowcreated="GridView1_RowCreated">
            <Columns>
                <asp:BoundField DataField="CheckPeriod" HeaderText="盘点期间" 
                    SortExpression="CheckPeriod" />
                <asp:BoundField DataField="WareHouseName" HeaderText="仓库名称" 
                    SortExpression="WareHouseName" />
                <asp:BoundField DataField="ProductName" HeaderText="商品名称" 
                    SortExpression="ProductName" />
                <asp:BoundField DataField="Specs" HeaderText="规格" SortExpression="Specs" />
                <asp:BoundField DataField="Quantity" HeaderText="数量" 
                    SortExpression="Quantity" />
                <asp:BoundField DataField="CheckQty" HeaderText="盘点数" 
                    SortExpression="CheckQty" />
                <asp:BoundField DataField="Memo" HeaderText="盘点说明" SortExpression="Memo" />
            </Columns>
        </asp:GridView>
        <asp:SqlDataSource ID="SqlDataSource1" runat="server" 
            ConnectionString="<%$ ConnectionStrings:ExpatiateAspNetConnectionString %>" 
            ProviderName="<%$ ConnectionStrings:ExpatiateAspNetConnectionString.ProviderName %>" 
            SelectCommand="SELECT [CheckPeriod], [WareHouseName], [ProductName], [Specs], [Quantity], [CheckQty], [Memo], [Warehouse] FROM [V_StoreCheckReport]">
        </asp:SqlDataSource>
    </div>
    </form>

显示结果为：