利用DataGrid控件显示主－从关系数据表
<%@ Page language="c#" Codebehind="ComputeBySNO.aspx.cs" AutoEventWireup="false" Inherits="DataGridInDataGrid.WebForm1" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
<HEAD>
<title>WebForm1</title>
<meta content="Microsoft Visual Studio .NET 7.1" name="GENERATOR">
<meta content="C#" name="CODE_LANGUAGE">
<meta content="JavaScript" name="vs_defaultClientScript">
<meta content="http://schemas.microsoft.com/intellisense/ie5" name="vs_targetSchema">
</HEAD>
<body>
<h2>按学号统计</h2>
<hr align="left" width="80%" noShade SIZE="4">
<br>
<form id="Form1" method="post" runat="server">
<FONT face="宋体">
<div align="left">
<asp:DataGrid id="dgMaster" runat="server" AutoGenerateColumns="False" ShowHeader="False" GridLines="None">
<Columns>
<asp:TemplateColumn>
<ItemTemplate>
<TABLE style="FONT-SIZE: 13px" width="400" align="center">
<TR bgColor="#cccccc">
<TD>学号：<%# DataBinder.Eval(Container.DataItem,"SNO") %></TD>
<TD>姓名：<%# DataBinder.Eval(Container.DataItem,"SName") %></TD>
<TD>性别：<%# Convert.ToInt32(DataBinder.Eval(Container.DataItem,"Sex"))==1?"男":"女" %></TD>
</TR>
<TR>
<TD colSpan="3">
<asp:DataGrid id=dgDetails runat="server" AutoGenerateColumns="False" OnItemDataBound="dgDetails_ItemDataBound" ShowFooter="True" CellPadding="3" BackColor="White" BorderWidth="1px" BorderStyle="None" BorderColor="#CCCCCC" Width="100%" DataSource='<%# ((System.Data.DataRowView)Container.DataItem).CreateChildView("tableRelation") %>'>
<FooterStyle Font-Size="12px" ForeColor="#000066" BackColor="White"></FooterStyle>
<SelectedItemStyle Font-Bold="True" ForeColor="White" BackColor="#669999"></SelectedItemStyle>
<ItemStyle Font-Size="12px" ForeColor="#000066"></ItemStyle>
<HeaderStyle Font-Size="12px" Font-Bold="True" ForeColor="White" BackColor="#006699"></HeaderStyle>
<Columns>
<asp:TemplateColumn HeaderText="课程名">
<ItemTemplate>
<asp:Label runat="server" Text='<%# DataBinder.Eval(Container, "DataItem.CourseName") %>'>
</asp:Label>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox runat="server" Text='<%# DataBinder.Eval(Container, "DataItem.CourseName") %>'>
</asp:TextBox>
</EditItemTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn HeaderText="成绩">
<ItemTemplate>
<asp:Label ID="lbl_score" runat="server" Text='<%# DataBinder.Eval(Container, "DataItem.Grade") %>'>
</asp:Label>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox runat="server" Text='<%# DataBinder.Eval(Container, "DataItem.Grade") %>'>
</asp:TextBox>
</EditItemTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn HeaderText="任课教师">
<ItemTemplate>
<asp:Label runat="server" Text='<%# DataBinder.Eval(Container, "DataItem.Teacher") %>'>
</asp:Label>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox runat="server" Text='<%# DataBinder.Eval(Container, "DataItem.Teacher") %>'>
</asp:TextBox>
</EditItemTemplate>
</asp:TemplateColumn>
</Columns>
<PagerStyle HorizontalAlign="Left" ForeColor="#000066" BackColor="White" Mode="NumericPages"></PagerStyle>
</asp:DataGrid></TD>
</TR>
<TR>
<TD colSpan="3">
<HR>
</TD>
</TR>
</TABLE>
</ItemTemplate>
</asp:TemplateColumn>
</Columns>
</asp:DataGrid></div>
</FONT>
</form>
</body>
</HTML>
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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 DataGridInDataGrid
{
/// <summary>
/// WebForm1 的摘要说明。
/// </summary>
public class WebForm1 : System.Web.UI.Page
{
private int SumScore=0;
private int MaxScore=0;
private int MinScore=100;//每门课的满分为100
protected System.Web.UI.WebControls.DataGrid dgMaster;
protected System.Web.UI.WebControls.DataGrid DataGrid2;
private void Page_Load(object sender, System.EventArgs e)
{
if(!Page.IsPostBack)
{
this.BindData();
}
}
private void BindData()
{
SqlConnection MyCn=new SqlConnection();
MyCn.ConnectionString=@"Server=BOBO\PLAYBOY;Database=StudyStatus;Uid=sa;Pwd=840616";
string str_sql = @"select * from students;select SNO,Course.CourseName,Score.Grade,Course.Teacher from Score,Course where Score.CourseNum=Course.CourseNum";
SqlDataAdapter Myda=new SqlDataAdapter(str_sql,MyCn);
DataSet ds=new DataSet();
Myda.Fill(ds);
ds.Tables[0].TableName="students";
ds.Tables[1].TableName="Score";
DataColumn parent=ds.Tables["students"].Columns["SNO"];
DataColumn child=ds.Tables["Score"].Columns["SNO"];
DataRelation tableRelation=new DataRelation("tableRelation",parent,child,false);
ds.Relations.Add(tableRelation);
this.dgMaster.DataSource=ds.Tables["students"].DefaultView;
this.dgMaster.DataBind();
}
/// <summary>
/// 模板列中的 DataGrid控件 的ItemDataBound事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
public void dgDetails_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
{
DataGrid dg=(DataGrid)(e.Item.Parent.Parent);
if(e.Item.ItemIndex>=0)
{
Label lbl_score=(Label)e.Item.Cells[1].FindControl("lbl_score");
int CurScore=int.Parse(lbl_score.Text);
this.SumScore+=CurScore;
if(this.MaxScore<CurScore)
{
this.MaxScore=CurScore;
}
if(this.MinScore>CurScore)
{
this.MinScore=CurScore;
}
}
if(e.Item.ItemType==ListItemType.Footer)
{
if(dg.Items.Count!=0)
{
e.Item.Cells[0].Text="成绩统计：[总分]"+this.SumScore.ToString()+" [平均分]"+String.Format("{0:N2}",(float)SumScore/(float)dg.Items.Count);
e.Item.Cells[1].Text="[最高分]"+this.MaxScore.ToString();
e.Item.Cells[2].Text="[最低分]"+this.MinScore.ToString();
//绑定完后，数据恢复
this.SumScore=this.MaxScore=0;
this.MinScore=100;
}
}
}
#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
}
}
