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用DATaGrid实现一对多的关系!

Posted on 2004-01-14 12:28  Hover  阅读(2057)  评论(3编辑  收藏  举报

我是菜鸟!贴一篇基础文章!

Test.Aspx.cs
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient ;

namespace bns.Test
{
 /// <summary>
 /// test 的摘要说明。
 /// </summary>
 public class test : System.Web.UI.Page
 {
  protected System.Web.UI.WebControls.DataGrid DataGrid1;
  public string connstring="server=.;uid=sa;pwd=tianpeng;database=northwind";
  private void Page_Load(object sender, System.EventArgs e)
  {
   // 在此处放置用户代码以初始化页面
   SqlConnection OrdersConnection =new  SqlConnection (connstring);
   OrdersConnection.Open ();
   SqlDataAdapter OrderAdapter =new SqlDataAdapter("Select * from Orders; select * from [Order Details]", OrdersConnection);
   DataSet ds=new DataSet();
   OrderAdapter.Fill (ds);  
   ds.Tables [0].TableName ="Orders";
   ds.Tables [1].TableName ="OrderDetails";
   DataColumn Parent;
   Parent=ds.Tables["Orders"].Columns["OrderId"];
   DataColumn Child;
   Child=ds.Tables["OrderDetails"].Columns ["OrderId"];
   DataRelation OrderRelation=new DataRelation("OrderRelation",Parent,Child,false);
   ds.Relations.Add(OrderRelation);
   DataGrid1.DataSource =ds.Tables["Orders"].DefaultView;
   DataGrid1.DataBind ();

  }

  #region Web 窗体设计器生成的代码
  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);
  }
  
  /// <summary>
  /// 设计器支持所需的方法 - 不要使用代码编辑器修改
  /// 此方法的内容。
  /// </summary>
  private void InitializeComponent()
  {   
   this.Load += new System.EventHandler(this.Page_Load);

  }
  #endregion
 }
}
Test.aspx
<%@ Page language="c#" Codebehind="test.aspx.cs" AutoEventWireup="false" Inherits="bns.Test.test" %>
<%@ Import NameSpace="System.Data"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
 <HEAD>
  <title>test</title>
  <meta name="GENERATOR" Content="Microsoft Visual Studio .NET 7.1">
  <meta name="CODE_LANGUAGE" Content="C#">
  <meta name="vs_defaultClientScript" content="JavaScript">
  <meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
 </HEAD>
 <body MS_POSITIONING="GridLayout">
  <form id="Form1" method="post" runat="server">
   <asp:DataGrid id="DataGrid1" BorderColor="#0099FF" runat="server" ShowHeader="False" Width="470px"
    CellPadding="0" CellSpacing="0" AutoGenerateColumns="False" BorderWidth="2px">
    <Columns>
     <asp:TempLateColumn>
      <ItemTemplate>
       <table cellspacing="0" cellpadding="0" width="100%" border="0">
        <tr>
         <td bgcolor="#ff6600"><b>订单号<%# DataBinder.Eval(Container.DataItem,"orderid")%></b></td>
        </tr>
        <tr>
         <td align="right">
          <asp:DataGrid ID =DataGrid2 Runat =server AutoGenerateColumns =false BorderColor="#33FF33" DataKeyField="OrderID"
DataSource='<%# ((DataRowView)Container.DataItem).CreateChildView("OrderRelation") %>'>
           <columns>
            <asp:BoundColumn Visible="False" DataField="OrderID" ReadOnly="True"></asp:BoundColumn>
            <asp:TemplateColumn HeaderText="产品名称">
             <HeaderStyle Width="300px"></HeaderStyle>
             <ItemTemplate>
              <%# DataBinder.Eval(Container.DataItem,"ProductID")%>
             </ItemTemplate>
            </asp:TemplateColumn>
            <asp:BoundColumn DataField="UnitPrice" HeaderText="单价"></asp:BoundColumn>
            <asp:BoundColumn DataField="Quantity" HeaderText="数量"></asp:BoundColumn>
            <asp:BoundColumn DataField="Discount" HeaderText="折扣"></asp:BoundColumn>
           </columns>
          </asp:DataGrid>
         </td>
        </tr>
       </table>
      </ItemTemplate>
     </asp:TempLateColumn>
    </Columns>
   </asp:DataGrid></FONT>
  </form>
 </body>
</HTML>