使用DataAdapter填充多个表(利用DataRelation)的实例代码
Default.aspx
复制代码 代码如下:
View Code
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>无标题页</title>
</head>
<body>
<form id="form1" runat="server">
<div>
</div>
<asp:Label ID="lbText" runat="server"></asp:Label>
</form>
</body>
</html>
Default.aspx.cs
复制代码 代码如下:
using System;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.SqlClient;
using System.Text;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
string connectionString = ConfigurationSettings.AppSettings["strCon"];
SqlConnection mycon = new SqlConnection(connectionString);//创建数据库连接
string sqlCategory = "select ID,C_Name from Photo_Category";//查询相册分类表中信息
string sqlPhoto = "select CategoryID,Title from Photo";//查询相册表中信息
SqlDataAdapter da = new SqlDataAdapter(sqlCategory, mycon);//创建数据适配器
DataSet ds = new DataSet();//创建数据集
try
{
if (mycon.State.Equals(ConnectionState.Closed))
{ mycon.Open(); }//显式地打开数据库连接
da.Fill(ds, "Photo_Category");//填充相册分类表
da.SelectCommand.CommandText = sqlPhoto;
da.Fill(ds, "Photo");//填充相册信息表
}
finally
{
mycon.Close();//显式地关闭数据库连接
}
//创建DataRelation对象，关联表间关系
DataRelation relat = new DataRelation("Photo_Category", ds.Tables["Photo_Category"].Columns["ID"],ds.Tables["Photo"].Columns["CategoryID"]);
ds.Relations.Add(relat);//添加表间关系
StringBuilder builder = new StringBuilder("");
foreach (DataRow row in ds.Tables["Photo_Category"].Rows)
{
builder.Append("<b>");
builder.Append(row["C_Name"].ToString());
builder.Append("</b><ul>");
DataRow[] childRows = row.GetChildRows(relat);
foreach (DataRow childRow in childRows)
{
builder.Append("<li>");
builder.Append(childRow["Title"].ToString());
builder.Append("</li>");
}
builder.Append("</ul>");
}
lbText.Text += builder.ToString();//将运行结果输出到页面中
}
}
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