三层架构连接Oracle 11g
连接Oracle时使用微软的Oracle连接组件；
一 DAL层
using System;using System.Collections.Generic;using System.Text;using System.Collections;using System.Data;using System.Data.OracleClient;namespace SystemDAL{public class DAL{//连接字符串public static string connectionString = System.Configuration.ConfigurationManager.ConnectionStrings["db"].ToString();public DAL(){//connectionString = System.Configuration.ConfigurationManager.ConnectionStrings["db"].ToString();}/// <summary>/// 执行单条语句/// </summary>/// <param name="sql"></param>/// <returns></returns>public static int ExecuteNonQuery(string sql){int x = 0;try{// Open a connection to the DB.OracleConnection connOra = new OracleConnection(connectionString);connOra.Open();OracleTransaction tran = connOra.BeginTransaction();// Create a command to execute the sql statement.OracleCommand cmdOra = connOra.CreateCommand();mandText = sql;x = cmdOra.ExecuteNonQuery();mit();connOra.Close();connOra.Dispose();cmdOra.Dispose();}catch (Exception ex){//log.Error(ex.StackTrace);}return x;}public static DataTable ExecuteDataTable(String cmdText){DataTable dt = new DataTable();//DbProviderFactory factory = DbProviderFactories.GetFactory(providerName);try{// Open a connection to the DB.//DbConnection connOra = factory.CreateConnection();OracleConnection connOra = new OracleConnection(connectionString);//connOra.ConnectionString = connectionString;connOra.Open();// Create a command to execute the sql statement.//DbCommand cmd = factory.CreateCommand();OracleCommand cmd = connOra.CreateCommand();mandText = cmdText;OracleDataAdapter ada = new OracleDataAdapter();//DbDataAdapter ada = factory.CreateDataAdapter();// new OracleDataAdapter(cmd1);ada.SelectCommand = cmd;ada.Fill(dt);connOra.Close();connOra.Dispose();cmd.Dispose();}catch (Exception ex){string str = ex.Message;}return dt;}}}
类DAL；
执行单条语句ExecuteNonQuery：
传入sql语句，返回值int；
打开Oracle连接，构造Oracle命令对象，设置命令对象的命令文本等于传入的sql；
执行sql，返回执行的int型结果；
获取数据表ExecuteDataTable:
传入sql语句，返回数据表；
打开Oracle连接；
构造Oracle命令对象，设置命令对象的命令文本等于传入的sql；
new一个Oracle适配器对象，设置适配器对象的SelectCommand等于命令对象；
调用适配器对象的Fill方法填充数据表对象，返回数据表对象；
二 BLL层
using System;using System.Collections.Generic;using System.Text;using SystemModel;using SystemDAL;using System.Data;namespace SystemBLL{public class BLL{public BLL(){}/// <summary>/// 插入方法/// </summary>/// <param name="M"></param>/// <returns></returns>public static int InsertData(LoginModel M){string sql = "INSERT INTO Login VALUES(@LoginName,@LoginPassword)";try{DAL dal = new DAL();return DAL.ExecuteNonQuery(sql);}catch (Exception E){throw E;}}/// <summary>/// 修改方法/// </summary>/// <param name="M"></param>/// <returns></returns>public static int UpdateTData(LoginModel M){string sql = "UPDATE Login SET LoginName=@LoginName,LoginPassword=@LoginPassword WHERE ID=@ID";try{DAL dal = new DAL();return DAL.ExecuteNonQuery(sql);}catch (Exception E){throw E;}}/// <summary>/// 删除方法/// </summary>/// <param name="M"></param>/// <returns></returns>public static int DeleteData(LoginModel M){string sql = "DELETE FROM Login WHERE ID=@ID";try{DAL dal = new DAL();return DAL.ExecuteNonQuery(sql);}catch (Exception E){throw E;}}/// <summary>/// 登录方法/// </summary>/// <param name="M"></param>/// <returns></returns>public static DataTable Login(string LoginName, string LoginPassword){string sql = "SELECT * FROM Logins WHERE UserName=@LoginName AND Password=@LoginPassword";try{DAL dal = new DAL();return DAL.ExecuteDataTable(sql);}catch (Exception E){throw E;}}/// <summary>/// 查询所有用户/// </summary>/// <param name="M"></param>/// <returns></returns>public static DataTable GetUser(LoginModel M){try{string sql = "SELECT * FROM Login";DAL dal = new DAL();return DAL.ExecuteDataTable(sql);}catch (Exception E){ throw E;}}/// <summary>/// 查询单个用户/// </summary>/// <param name="M"></param>/// <returns></returns>public static DataTable GetUserID(LoginModel M){try{string sql = "SELECT * FROM Login WHERE ID=@ID";DAL dal = new DAL();return DAL.ExecuteDataTable(sql);}catch (Exception E){throw E;}}}}
引用SystemModel，SystemDAL；
类BLL;
插入数据InsertData：
传入LoginModel对象M，返回int；
调用DAL.ExecuteNonQuery在Login表中插入值；
修改数据UpdateTData：
传入LoginModel对象M，返回int；
调用DAL.ExecuteNonQuery更新Login表;
删除数据DeleteData：
传入LoginModel对象M，返回int；
调用DAL.ExecuteNonQuery从Login表删除数据;
登录方法Login：
调用DAL.ExecuteNonQuery从Login表返回匹配的记录；
返回类型为DataTable；
查询所有用户，返回DataTable；
查询单个用户，根据ID返回DataTable；
三 实体层
using System;using System.Collections.Generic;using System.Text;namespace SystemModel{public class LoginModel{public LoginModel(){}private int _ID;public int ID{get { return _ID; }set { _ID = value; }}private string _LoginName;public string LoginName{get { return _LoginName; }set { _LoginName = value; }}private string _LoginPassword;public string LoginPassword{get { return _LoginPassword; }set { _LoginPassword = value; }}}}
四 前端
login.aspx<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Login.aspx.cs" Inherits="_Default" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "/TR/xhtml11/DTD/xhtml11.dtd"><html xmlns="/1999/xhtml"><head runat="server"><title>登录界面|- </title></head><body style="text-align: center"><form id="form1" runat="server"><asp:ScriptManager ID="ScriptManager1" runat="server" /><asp:Panel ID="Panel1" runat="server" Height="13px" Width="359px" style="font-weight: bold; font-size: small"><table style="width: 372px"><tr><td style="width: 81px"><asp:Label ID="Label1" runat="server" Text="用户名"></asp:Label></td><td style="width: 146px"><asp:TextBox ID="TextBox1" runat="server" Height="18px"></asp:TextBox></td><td style="width: 116px"><asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="TextBox1"ErrorMessage="用户名不能为空" ForeColor="DarkGray" Width="126px"></asp:RequiredFieldValidator></td></tr><tr><td style="width: 81px; height: 28px;"><asp:Label ID="Label2" runat="server" Text="密 码"></asp:Label></td><td style="width: 146px; height: 28px;"><asp:TextBox ID="TextBox2" runat="server" TextMode="Password" Width="149px"></asp:TextBox></td><td style="width: 116px; height: 28px;"><asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" ControlToValidate="TextBox2"ErrorMessage="密码不能为空" ForeColor="DarkGray"></asp:RequiredFieldValidator></td></tr><tr><td style="width: 81px"></td><td style="width: 146px"><asp:LinkButton ID="LinkButton1" runat="server" Font-Underline="False" ForeColor="Black"OnClick="LinkButton1_Click">登 录</asp:LinkButton><asp:LinkButton ID="LinkButton2" runat="server" Font-Underline="False" ForeColor="Black"OnClick="LinkButton2_Click">重 置</asp:LinkButton></td><td style="width: 116px"></td></tr></table></asp:Panel></form></body></html>
login.aspx.cs
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 SystemModel;using SystemBLL;public partial class _Default : System.Web.UI.Page {protected void Page_Load(object sender, EventArgs e){}protected void LinkButton1_Click(object sender, EventArgs e){DataTable table1 = BLL.Login(this.TextBox1.Text, this.TextBox2.Text);if (table1.Rows.Count > 0){Page.ClientScript.RegisterStartupScript(Page.GetType(), "message", "<script language='javascript' defer>alert('登录成功！');</script>");Response.Redirect("test.aspx");}else{Page.ClientScript.RegisterStartupScript(Page.GetType(), "message", "<script language='javascript' defer>alert('登录失败！');</script>");}}protected void LinkButton2_Click(object sender, EventArgs e){this.TextBox1.Text = null;this.TextBox2.Text = null;}}
五 web.config
<span style="white-space:pre"></span><connectionStrings><add name="db" connectionString="Data Source=ORCL;User Id=scott;Password=123dd654ca"/></connectionStrings>
