主页 / 网络编程 /

使用DataAdapter填充多个表(利用DataRelation)的实例代

网络编程 2021-07-04 22:40www.168986.cn编程入门
使用DataAdapter填充多个表(利用DataRelation)的实例代码，需要的朋友可以参考一下

Default.aspx

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://.w3./TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://.w3./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

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
    }

}

上一篇：Repeater全选删除和分页实现思路及代码 下一篇：.NET实现XML与DataTable互转的实例代码

编程语言

Copyright © 2016-2025 www.168986.cn 狼蚁网络 版权所有 Power by