利用ASP.NET DataGrid显示主次关系的数据(c#版)

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HierarchicalDataGrid.aspx内容

<%@ Page language="c#" Codebehind="HierarchicalDataGrid.aspx.cs" AutoEventWireup="false" Inherits="HierarchicalDataGrid.HierarchicalDataGrid" %>
<%@ Import namespace="System.Data"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
  <title>?ι??</title>
  <meta name="GENERATOR" content="Microsoft Visual Studio.NET 7.0">
  <meta name="CODE_LANGUAGE" content="Visual Basic 7.0">
  <meta name="vs_defaultClientScript" content="JavaScript">
  <meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
</HEAD>
<body>
  <form ></FONT>
       </EditItemTemplate>
      </asp:TemplateColumn>
     </Columns>
    </asp:DataGrid></P>
  </form>
</body>
</HTML>

HierarchicalDataGrid.aspx.cs内容

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Data.SqlClient;

namespace HierarchicalDataGrid
{
public class HierarchicalDataGrid : System.Web.UI.Page
{
protected System.Web.UI.WebControls.DataGrid DataGrid1 = null;
#region " Web Form Designer Generated Code "

  // 下面的调用对Web Form设计器来说是必须的
  //[System.Diagnostics.DebuggerStepThrough()]
  override protected void OnInit(EventArgs e)
  {
   //
   // CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
   //
   InitializeComponent();
   base.OnInit(e);
  }

  private void InitializeComponent()
  {
   this.DataGrid1.ItemDataBound += new System.Web.UI.WebControls.DataGridItemEventHandler(this.DataGrid1_ItemDataBound);
   this.Load += new System.EventHandler(this.Page_Load);

  }

  // CODEGEN: 这个方法是为Web Form设计器调用的
  // 不要用代码编辑器改变这里.
//  private void Page_Init(System.Object sender,System.EventArgs e)
//  {
//   InitializeComponent();
//  }
  #endregion

  // 打开数据库连接
  private void Page_Load(System.Object sender,System.EventArgs e)
  {
   SqlConnection OrdersConnection = new SqlConnection ("Server=localhost;Database=northwind;user id = sa; password=sa;");
   // 得到订单和订单详细信息
   SqlDataAdapter OrderAdapter = new SqlDataAdapter ("Select * from Orders; select OrderID ,Products.ProductName,[order Details].Unitprice,[order Details].Quantity,[order Details].discount from [order Details],Products where [Order Details].ProductId=Products.ProductID",OrdersConnection);
   // 创建并填充DataSet对象
   DataSet OrderDataSet = new DataSet ();
   OrderAdapter.Fill(OrderDataSet);
   // 设定表名字
   OrderDataSet.Tables[0].TableName = "Orders";
   OrderDataSet.Tables[1].TableName = "Order Details";
   // 在基于OrderID字段的两个表之间建立父子关系
   DataColumn Parent = OrderDataSet.Tables["Orders"].Columns["OrderID"];
   DataColumn Child = OrderDataSet.Tables["Order Details"].Columns["OrderID"];
   DataRelation OrderRelation = new DataRelation ("OrderRelation", Parent, Child, false);
   // 为DataSet添加关系
   OrderDataSet.Relations.Add(OrderRelation);
   // 把DataGrid绑定到Orders表
   DataGrid1.DataSource = OrderDataSet.Tables["Orders"].DefaultView;
   DataBind();
  }

  private void DataGrid1_ItemDataBound(object sender,System.Web.UI.WebControls.DataGridItemEventArgs e)
  {
   e.Item.Cells[0].BackColor = System.Drawing.Color.Ivory;
  }
}
}