项目 | 用途 |
BLL |
业务逻辑组件存放之处 |
ConfigTool |
用来加密连接字符串和创建事件日志源的管理应用程序 |
DALFactory |
用来确定加载哪一个数据库访问程序集的类 |
IDAL |
每个 DAL 实现都要实现的一组接口 |
Model |
瘦数据类或业务实体 |
OracleDAL |
Oracle 特定的 Pet Shop DAL 实现,使用了 IDAL 接口 |
Post-Build |
运行编译后操作的项目,比如将程序集添加到 GAC 或 COM+ |
Pre-Build |
将程序集从 GAC 删除或从 COM+ 注销程序集的项目 |
SQLServerDAL |
Microsoft SQL Server 特定的 Pet Shop DAL 实现,使用了 IDAL 接口 |
Utility |
一组帮助器类,包括 DPAPI 的包装 |
Web |
Web 页和控件 |
Solution Items |
用来构建应用程序的杂项,比如用来签署应用程序程序集的 Pet Shop.snk 密钥文件 |
SQLServerDAL项目中存在一个SQLHelper的辅助类,其中重载了几个方法,用来向数据库发出不同类型的命令
public static int ExecuteNonQuery(string connString, CommandType cmdType, string cmdText, params SqlParameter[] cmdParms) {
SqlCommand cmd = new SqlCommand();
using (SqlConnection conn = new SqlConnection(connString)) {
PrepareCommand(cmd, conn, null, cmdType, cmdText, cmdParms);
int val = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
return val;
}
}
.
SqlCommand cmd = new SqlCommand();
using (SqlConnection conn = new SqlConnection(connString)) {
PrepareCommand(cmd, conn, null, cmdType, cmdText, cmdParms);
int val = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
return val;
}
}
.
它提供的全是静态类.这个项目的其他类通过这个辅助类进行对数据库数据的操作,相关的几个类全实现了IDAL接口
public class Account : IAccount{
Model项目为业务实体,如用户实体
1using System;
2
3namespace PetShop.Model {
4
5 /// <summary>
6 /// Business entity used to model accounts
7 /// </summary>
8 [Serializable]
9 public class AccountInfo {
10
11 // 声明成员变量
12 private string _userId;
13 private string _password;
14 private string _email;
15 private AddressInfo _address;
16 private string _language;
17 private string _category;
18 private bool _showFavorites;
19 private bool _showBanners;
20
21 /// <summary>
22 /// Default constructor
23 /// </summary>
24 public AccountInfo() {
25 }
26
27 /// <summary>
28 /// Constructor with specified initial values
29 /// </summary>
30 /// <param name="userId">userId</param>
31 /// <param name="password">密码</param>
32 /// <param name="email">Email</param>
33 /// <param name="address">地址</param>
34 /// <param name="language">语言</param>
35 /// <param name="category">关注类型</param>
36 /// <param name="showFavorites">是否显示我关注的其他信息</param>
37 /// <param name="showBanners">是否显示我所关注的信息</param>
38 public AccountInfo(string userId, string password, string email, AddressInfo address, string language, string category, bool showFavorites, bool showBanners) {
39 this._userId = userId;
40 this._password = password;
41 this._email = email;
42 this._address = address;
43 this._language = language;
44 this._category = category;
45 this._showFavorites = showFavorites;
46 this._showBanners = showBanners;
47 }
48
49 // Properties
50 public string UserId {
51 get { return _userId; }
52 }
53 public string Password {
54 get { return _password; }
55 }
56 public string Email {
57 get { return _email; }
58 }
59 public AddressInfo Address {
60 get { return _address; }
61 }
62 public string Language {
63 get { return _language; }
64 }
65 public string Category {
66 get { return _category; }
67 }
68 public bool IsShowFavorites {
69 get { return _showFavorites; }
70 }
71 public bool IsShowBanners {
72 get { return _showBanners; }
73 }
74 }
75}
2
3namespace PetShop.Model {
4
5 /// <summary>
6 /// Business entity used to model accounts
7 /// </summary>
8 [Serializable]
9 public class AccountInfo {
10
11 // 声明成员变量
12 private string _userId;
13 private string _password;
14 private string _email;
15 private AddressInfo _address;
16 private string _language;
17 private string _category;
18 private bool _showFavorites;
19 private bool _showBanners;
20
21 /// <summary>
22 /// Default constructor
23 /// </summary>
24 public AccountInfo() {
25 }
26
27 /// <summary>
28 /// Constructor with specified initial values
29 /// </summary>
30 /// <param name="userId">userId</param>
31 /// <param name="password">密码</param>
32 /// <param name="email">Email</param>
33 /// <param name="address">地址</param>
34 /// <param name="language">语言</param>
35 /// <param name="category">关注类型</param>
36 /// <param name="showFavorites">是否显示我关注的其他信息</param>
37 /// <param name="showBanners">是否显示我所关注的信息</param>
38 public AccountInfo(string userId, string password, string email, AddressInfo address, string language, string category, bool showFavorites, bool showBanners) {
39 this._userId = userId;
40 this._password = password;
41 this._email = email;
42 this._address = address;
43 this._language = language;
44 this._category = category;
45 this._showFavorites = showFavorites;
46 this._showBanners = showBanners;
47 }
48
49 // Properties
50 public string UserId {
51 get { return _userId; }
52 }
53 public string Password {
54 get { return _password; }
55 }
56 public string Email {
57 get { return _email; }
58 }
59 public AddressInfo Address {
60 get { return _address; }
61 }
62 public string Language {
63 get { return _language; }
64 }
65 public string Category {
66 get { return _category; }
67 }
68 public bool IsShowFavorites {
69 get { return _showFavorites; }
70 }
71 public bool IsShowBanners {
72 get { return _showBanners; }
73 }
74 }
75}
BLL这个项目就开始调用对数据库表操作的方法了.其中每个类都通过DALFactory项目载入需要的程序集,然后执行相关业务操作
这个是基本思想