asp.net的数据库连接数据示例

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web.config 文件

default.aspx.cs 文件

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;//SQL数据库的必须类库

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        //**************
        //直接连接数据库
        //string connStr="user id=sa;password=;initial catalog=database;data source=localhost";
        //SqlConnection MyConn = new SqlConnection(connStr);

        //********************
        //通过配置文件的连接字符串来连接
        SqlConnection conn=new SqlConnection(ConfigurationManager.ConnectionStrings["connStr"].ConnectionString);

        string sql = "select top 20 * from tabale";
        SqlCommand cmd = new SqlCommand(sql, conn);
        SqlDataAdapter da = new SqlDataAdapter(cmd);
        DataSet ds = new DataSet();
        da.Fill(ds, "adinfos");
        this.ad1.DataSource = ds.Tables["adinfos"];
        this.ad1.DataBind();
        conn.Close();
    }
}

default.aspx 文件

<%@ 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">