基于.NET平台的分层架构实战（八）——数据访问层的第二种实现：SQLServer+存储过程
2008-07-05 09:54 T2噬菌体 阅读(8579) 评论(18) 编辑 收藏 举报
在上一篇中，讨论了使用SQL构建数据访问层的方法，并且针对的是Access数据库。而这一篇中，将要创建一个针对SQLServer数据库的数据访问层，并且配合存储过程实现。
在上一篇中，讨论了使用SQL构建数据访问层的方法，并且针对的是Access数据库。而这一篇中，将要创建一个针对SQLServer数据库的数据访问层，并且配合存储过程实现。
曾经有朋友问我使用SQL和存储过程在效率上的差别，惭愧的是我对这方面没有研究，也没有实际做过测试。通过查阅资料，发现在一般情况下，存储过程的效率由于使用SQL，但是也不绝对，也发现有的朋友测试时发现在特定情况下SQL的效率优于存储过程，所以这个问题不能一概而论。
好，废话不多说，这里先列出使用存储过程构建数据访问层的一般步骤：
1.创建新工程
2.创建数据库
3.编写相应存储过程
4.编写数据库辅助类
5.实现数据访问层
创建新工程
在开始所有开发工作前，我们需要在解决方案下新建一个工程，叫SQLServerDAL，用于存放所有SQLServer数据访问层的代码。
创建数据库
首先，我们要根据前文设计的数据库，在SQLServer中创建相应的数据库及数据表。我使用的是SQLServer2005，使用企业管理器创建，创建方法不再赘述。
编写存储过程
数据库创建完成后，我们就要编写存储过程了。由于数据访问层接口已经确定，所以需要哪些存储过程也很好确定。例如数据访问层接口中有一个添加管理员方法，那么就一定有一个存储过程实现这个功能。
还是以管理员模块为例，经过简单分析，需要一下存储过程：
插入管理员记录
删除管理员记录
更新管理员信息
按ID取得管理员记录
按用户名及密码取得管理员记录
按用户名取得管理员记录
取得全部管理员记录
创建这些存储过程的SQL代码如下：
set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
GO
-- =============================================
-- Author: <T2噬菌体>
-- Create date: <2008-07-04>
-- Description: <插入管理员记录>
-- =============================================
CREATE PROCEDURE [dbo].[Pr_InsertAdmin]
(
@Name Nvarchar(20),
@Password Nvarchar(50)
)
AS
INSERT INTO TAdmin
(
[Name],
[Password]
)
VALUES
(
@Name,
@Password
)
set QUOTED_IDENTIFIER ON
GO
-- =============================================
-- Author: <T2噬菌体>
-- Create date: <2008-07-04>
-- Description: <插入管理员记录>
-- =============================================
CREATE PROCEDURE [dbo].[Pr_InsertAdmin]
(
@Name Nvarchar(20),
@Password Nvarchar(50)
)
AS
INSERT INTO TAdmin
(
[Name],
[Password]
)
VALUES
(
@Name,
@Password
)
set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
GO
-- =============================================
-- Author: <T2噬菌体>
-- Create date: <2008-07-04>
-- Description: <删除管理员记录>
-- =============================================
CREATE PROCEDURE [dbo].[Pr_DeleteAdmin]
(
@ID Int
)
AS
DELETE FROM TAdmin
WHERE [ID]=@ID
set QUOTED_IDENTIFIER ON
GO
-- =============================================
-- Author: <T2噬菌体>
-- Create date: <2008-07-04>
-- Description: <删除管理员记录>
-- =============================================
CREATE PROCEDURE [dbo].[Pr_DeleteAdmin]
(
@ID Int
)
AS
DELETE FROM TAdmin
WHERE [ID]=@ID
set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
GO
-- =============================================
-- Author: <T2噬菌体>
-- Create date: <2008-07-04>
-- Description: <修改管理员记录>
-- =============================================
CREATE PROCEDURE [dbo].[Pr_UpdateAdmin]
(
@ID Int,
@Name Nvarchar(20),
@Password Nvarchar(50)
)
AS
UPDATE TAdmin
SET
[Name]=@Name,
[Password]=@Password
WHERE [ID]=@ID
set QUOTED_IDENTIFIER ON
GO
-- =============================================
-- Author: <T2噬菌体>
-- Create date: <2008-07-04>
-- Description: <修改管理员记录>
-- =============================================
CREATE PROCEDURE [dbo].[Pr_UpdateAdmin]
(
@ID Int,
@Name Nvarchar(20),
@Password Nvarchar(50)
)
AS
UPDATE TAdmin
SET
[Name]=@Name,
[Password]=@Password
WHERE [ID]=@ID
set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
GO
-- =============================================
-- Author: <T2噬菌体>
-- Create date: <2008-07-04>
-- Description: <按ID取得管理员信息>
-- =============================================
CREATE PROCEDURE [dbo].[Pr_GetAdminByID]
(
@ID Int
)
AS
SELECT * FROM TAdmin
WHERE [ID]=@ID
set QUOTED_IDENTIFIER ON
GO
-- =============================================
-- Author: <T2噬菌体>
-- Create date: <2008-07-04>
-- Description: <按ID取得管理员信息>
-- =============================================
CREATE PROCEDURE [dbo].[Pr_GetAdminByID]
(
@ID Int
)
AS
SELECT * FROM TAdmin
WHERE [ID]=@ID
set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
GO
-- =============================================
-- Author: <T2噬菌体>
-- Create date: <2008-07-04>
-- Description: <按用户名及密码取得管理员信息>
-- =============================================
CREATE PROCEDURE [dbo].[Pr_GetAdminByNameAndPassword]
(
@Name Nvarchar(20),
@Password Nvarchar(50)
)
AS
SELECT * FROM TAdmin
WHERE [Name]=@Name
AND [Password]=@Password
set QUOTED_IDENTIFIER ON
GO
-- =============================================
-- Author: <T2噬菌体>
-- Create date: <2008-07-04>
-- Description: <按用户名及密码取得管理员信息>
-- =============================================
CREATE PROCEDURE [dbo].[Pr_GetAdminByNameAndPassword]
(
@Name Nvarchar(20),
@Password Nvarchar(50)
)
AS
SELECT * FROM TAdmin
WHERE [Name]=@Name
AND [Password]=@Password
set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
GO
-- =============================================
-- Author: <T2噬菌体>
-- Create date: <2008-07-04>
-- Description: <按用户名取得管理员信息>
-- =============================================
CREATE PROCEDURE [dbo].[Pr_GetAdminByName]
(
@Name Nvarchar(20)
)
AS
SELECT * FROM TAdmin
WHERE [Name]=@Name
set QUOTED_IDENTIFIER ON
GO
-- =============================================
-- Author: <T2噬菌体>
-- Create date: <2008-07-04>
-- Description: <按用户名取得管理员信息>
-- =============================================
CREATE PROCEDURE [dbo].[Pr_GetAdminByName]
(
@Name Nvarchar(20)
)
AS
SELECT * FROM TAdmin
WHERE [Name]=@Name
set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
GO
-- =============================================
-- Author: <T2噬菌体>
-- Create date: <2008-07-04>
-- Description: <取得全部管理员信息>
-- =============================================
CREATE PROCEDURE [dbo].[Pr_GetAllAdmin]
AS
SELECT * FROM TAdmin
set QUOTED_IDENTIFIER ON
GO
-- =============================================
-- Author: <T2噬菌体>
-- Create date: <2008-07-04>
-- Description: <取得全部管理员信息>
-- =============================================
CREATE PROCEDURE [dbo].[Pr_GetAllAdmin]
AS
SELECT * FROM TAdmin
编写数据库辅助类
由于访问数据库的代码很相似，这里我们仍需要编写一个数据库辅助类，来将常用代码封装起来，方便复用。虽然在这里只使用到了存储过程，但是为了扩展性考虑，这个数据库辅助类仍然包含了通过SQL访问数据库的方法。具体实现如下：
SQLServerDALHelper.cs:
1using System;
2using System.Collections.Generic;
3using System.Configuration;
4using System.Data;
5using System.Data.SqlClient;
6
7namespace NGuestBook.SQLServerDAL
8{
9 /// <summary>
10 /// SQLServer数据库操作助手
11 /// </summary>
12 public sealed class SQLServerDALHelper
13 {
14 /// <summary>
15 /// 用于连接SQLServer数据库的连接字符串，存于Web.config中
16 /// </summary>
17 private static readonly string _sqlConnectionString = ConfigurationManager.AppSettings["SQLServerConnectionString"];
18
19 /// <summary>
20 /// 执行SQL命令，不返回任何值
21 /// </summary>
22 /// <param name="sql">SQL命令</param>
23 public static void ExecuteSQLNonQurey(string sql)
24 {
25 SqlConnection connection = new SqlConnection(_sqlConnectionString);
26 SqlCommand command = new SqlCommand(sql,connection);
27 connection.Open();
28 command.ExecuteNonQuery();
29 connection.Close();
30 }
31
32 /// <summary>
33 /// 执行SQL命令，并返回SqlDataReader
34 /// </summary>
35 /// <param name="sql">SQL命令</param>
36 /// <returns>包含查询结果的SqlDataReader</returns>
37 public static SqlDataReader ExecuteSQLReader(string sql)
38 {
39 SqlConnection connection = new SqlConnection(_sqlConnectionString);
40 SqlCommand command = new SqlCommand(sql, connection);
41 connection.Open();
42 SqlDataReader sqlReader = command.ExecuteReader();
43 //connection.Close();
44
45 return sqlReader;
46 }
47
48 /// <summary>
49 /// 执行存储过程，不返回任何值
50 /// </summary>
51 /// <param name="storedProcedureName">存储过程名</param>
52 /// <param name="parameters">参数</param>
53 public static void ExecuteProcedureNonQurey(string storedProcedureName,IDataParameter[] parameters)
54 {
55 SqlConnection connection = new SqlConnection(_sqlConnectionString);
56 SqlCommand command = new SqlCommand(storedProcedureName,connection);
57 command.CommandType = CommandType.StoredProcedure;
58 if (parameters != null)
59 {
60 foreach (SqlParameter parameter in parameters)
61 {
62 command.Parameters.Add(parameter);
63 }
64 }
65 connection.Open();
66 command.ExecuteNonQuery();
67 connection.Close();
68 }
69
70 /// <summary>
71 /// 执行存储，并返回SqlDataReader
72 /// </summary>
73 /// <param name="storedProcedureName">存储过程名</param>
74 /// <param name="parameters">参数</param>
75 /// <returns>包含查询结果的SqlDataReader</returns>
76 public static SqlDataReader ExecuteProcedureReader(string storedProcedureName,IDataParameter[] parameters)
77 {
78 SqlConnection connection = new SqlConnection(_sqlConnectionString);
79 SqlCommand command = new SqlCommand(storedProcedureName,connection);
80 command.CommandType = CommandType.StoredProcedure;
81 if (parameters != null)
82 {
83 foreach (SqlParameter parameter in parameters)
84 {
85 command.Parameters.Add(parameter);
86 }
87 }
88 connection.Open();
89 SqlDataReader sqlReader = command.ExecuteReader();
90 //connection.Close();
91
92 return sqlReader;
93 }
94 }
95}
2using System.Collections.Generic;
3using System.Configuration;
4using System.Data;
5using System.Data.SqlClient;
6
7namespace NGuestBook.SQLServerDAL
8{
9 /// <summary>
10 /// SQLServer数据库操作助手
11 /// </summary>
12 public sealed class SQLServerDALHelper
13 {
14 /// <summary>
15 /// 用于连接SQLServer数据库的连接字符串，存于Web.config中
16 /// </summary>
17 private static readonly string _sqlConnectionString = ConfigurationManager.AppSettings["SQLServerConnectionString"];
18
19 /// <summary>
20 /// 执行SQL命令，不返回任何值
21 /// </summary>
22 /// <param name="sql">SQL命令</param>
23 public static void ExecuteSQLNonQurey(string sql)
24 {
25 SqlConnection connection = new SqlConnection(_sqlConnectionString);
26 SqlCommand command = new SqlCommand(sql,connection);
27 connection.Open();
28 command.ExecuteNonQuery();
29 connection.Close();
30 }
31
32 /// <summary>
33 /// 执行SQL命令，并返回SqlDataReader
34 /// </summary>
35 /// <param name="sql">SQL命令</param>
36 /// <returns>包含查询结果的SqlDataReader</returns>
37 public static SqlDataReader ExecuteSQLReader(string sql)
38 {
39 SqlConnection connection = new SqlConnection(_sqlConnectionString);
40 SqlCommand command = new SqlCommand(sql, connection);
41 connection.Open();
42 SqlDataReader sqlReader = command.ExecuteReader();
43 //connection.Close();
44
45 return sqlReader;
46 }
47
48 /// <summary>
49 /// 执行存储过程，不返回任何值
50 /// </summary>
51 /// <param name="storedProcedureName">存储过程名</param>
52 /// <param name="parameters">参数</param>
53 public static void ExecuteProcedureNonQurey(string storedProcedureName,IDataParameter[] parameters)
54 {
55 SqlConnection connection = new SqlConnection(_sqlConnectionString);
56 SqlCommand command = new SqlCommand(storedProcedureName,connection);
57 command.CommandType = CommandType.StoredProcedure;
58 if (parameters != null)
59 {
60 foreach (SqlParameter parameter in parameters)
61 {
62 command.Parameters.Add(parameter);
63 }
64 }
65 connection.Open();
66 command.ExecuteNonQuery();
67 connection.Close();
68 }
69
70 /// <summary>
71 /// 执行存储，并返回SqlDataReader
72 /// </summary>
73 /// <param name="storedProcedureName">存储过程名</param>
74 /// <param name="parameters">参数</param>
75 /// <returns>包含查询结果的SqlDataReader</returns>
76 public static SqlDataReader ExecuteProcedureReader(string storedProcedureName,IDataParameter[] parameters)
77 {
78 SqlConnection connection = new SqlConnection(_sqlConnectionString);
79 SqlCommand command = new SqlCommand(storedProcedureName,connection);
80 command.CommandType = CommandType.StoredProcedure;
81 if (parameters != null)
82 {
83 foreach (SqlParameter parameter in parameters)
84 {
85 command.Parameters.Add(parameter);
86 }
87 }
88 connection.Open();
89 SqlDataReader sqlReader = command.ExecuteReader();
90 //connection.Close();
91
92 return sqlReader;
93 }
94 }
95}
实现数据访问层
最后仍以管理员模块为例，看一下具体数据访问层的实现。
AdminDAL.cs:
1using System;
2using System.Collections.Generic;
3using System.Text;
4using System.Data;
5using System.Data.SqlClient;
6using NGuestBook.IDAL;
7using NGuestBook.Entity;
8
9namespace NGuestBook.SQLServerDAL
10{
11 public class AdminDAL : IAdminDAL
12 {
13 /// <summary>
14 /// 插入管理员
15 /// </summary>
16 /// <param name="admin">管理员实体类</param>
17 /// <returns>是否成功</returns>
18 public bool Insert(AdminInfo admin)
19 {
20 SqlParameter[] parameters =
21 {
22 new SqlParameter("@Name",SqlDbType.NVarChar),
23 new SqlParameter("@Password",SqlDbType.NVarChar)
24 };
25 parameters[0].Value = admin.Name;
26 parameters[1].Value = admin.Password;
27 try
28 {
29 SQLServerDALHelper.ExecuteProcedureNonQurey("Pr_InsertAdmin", parameters);
30 return true;
31 }
32 catch
33 {
34 return false;
35 }
36 }
37
38 /// <summary>
39 /// 删除管理员
40 /// </summary>
41 /// <param name="id">欲删除的管理员的ID</param>
42 /// <returns>是否成功</returns>
43 public bool Delete(int id)
44 {
45 SqlParameter[] parameters =
46 {
47 new SqlParameter("@ID",SqlDbType.Int)
48 };
49 parameters[0].Value = id;
50 try
51 {
52 SQLServerDALHelper.ExecuteProcedureNonQurey("Pr_DeleteAdmin", parameters);
53 return true;
54 }
55 catch
56 {
57 return false;
58 }
59 }
60
61 ///<summary>
62 /// 更新管理员信息
63 /// </summary>
64 /// <param name="admin">管理员实体类</param>
65 /// <returns>是否成功</returns>
66 public bool Update(AdminInfo admin)
67 {
68 SqlParameter[] parameters =
69 {
70 new SqlParameter("@ID",SqlDbType.Int),
71 new SqlParameter("@Name",SqlDbType.NVarChar),
72 new SqlParameter("@Password",SqlDbType.NVarChar)
73 };
74 parameters[0].Value = admin.ID;
75 parameters[1].Value = admin.Name;
76 parameters[2].Value = admin.Password;
77 try
78 {
79 SQLServerDALHelper.ExecuteProcedureNonQurey("Pr_UpdateAdmin", parameters);
80 return true;
81 }
82 catch
83 {
84 return false;
85 }
86 }
87
88 /// <summary>
89 /// 按ID取得管理员信息
90 /// </summary>
91 /// <param name="id">管理员ID</param>
92 /// <returns>管理员实体类</returns>
93 public AdminInfo GetByID(int id)
94 {
95 SqlParameter[] parameters =
96 {
97 new SqlParameter("@ID",SqlDbType.Int)
98 };
99 parameters[0].Value = id;
100 SqlDataReader dataReader = null;
101 try
102 {
103 dataReader = SQLServerDALHelper.ExecuteProcedureReader("GetAdminByID", parameters);
104 dataReader.Read();
105 AdminInfo admin = new AdminInfo();
106 admin.ID = (int)dataReader["ID"];
107 admin.Name = (string)dataReader["Name"];
108 admin.Password = (string)dataReader["Password"];
109
110 return admin;
111 }
112 catch
113 {
114 return null;
115 }
116 finally
117 {
118 dataReader.Close();
119 }
120 }
121
122 /// <summary>
123 /// 按用户名及密码取得管理员信息
124 /// </summary>
125 /// <param name="name">用户名</param>
126 /// <param name="password">密码</param>
127 /// <returns>管理员实体类，不存在时返回null</returns>
128 public AdminInfo GetByNameAndPassword(string name, string password)
129 {
130 SqlParameter[] parameters =
131 {
132 new SqlParameter("@Name",SqlDbType.NVarChar),
133 new SqlParameter("@Password",SqlDbType.NVarChar)
134 };
135 parameters[0].Value = name;
136 parameters[1].Value = password;
137 SqlDataReader dataReader = null;
138 try
139 {
140 dataReader = SQLServerDALHelper.ExecuteProcedureReader("GetAdminByNameAndPassword", parameters);
141 dataReader.Read();
142 AdminInfo admin = new AdminInfo();
143 admin.ID = (int)dataReader["ID"];
144 admin.Name = (string)dataReader["Name"];
145 admin.Password = (string)dataReader["Password"];
146
147 return admin;
148 }
149 catch
150 {
151 return null;
152 }
153 finally
154 {
155 dataReader.Close();
156 }
157 }
158
159 /// <summary>
160 /// 按管理员名取得管理员信息
161 /// </summary>
162 /// <param name="name">管理员名</param>
163 /// <returns>管理员实体类</returns>
164 public AdminInfo GetByName(string name)
165 {
166 SqlParameter[] parameters =
167 {
168 new SqlParameter("@Name",SqlDbType.NVarChar)
169 };
170 parameters[0].Value = name;
171 SqlDataReader dataReader = null;
172 try
173 {
174 dataReader = SQLServerDALHelper.ExecuteProcedureReader("GetAdminByName", parameters);
175 dataReader.Read();
176 AdminInfo admin = new AdminInfo();
177 admin.ID = (int)dataReader["ID"];
178 admin.Name = (string)dataReader["Name"];
179 admin.Password = (string)dataReader["Password"];
180
181 return admin;
182 }
183 catch
184 {
185 return null;
186 }
187 finally
188 {
189 dataReader.Close();
190 }
191 }
192
193 /// <summary>
194 /// 取得全部管理员信息
195 /// </summary>
196 /// <returns>管理员实体类集合</returns>
197 public IList<AdminInfo> GetAll()
198 {
199 SqlDataReader dataReader = null;
200 try
201 {
202 dataReader = SQLServerDALHelper.ExecuteProcedureReader("GetAllAdmin", null);
203 IList<AdminInfo> adminCollection=new List<AdminInfo>();
204 while (dataReader.Read())
205 {
206 AdminInfo admin = new AdminInfo();
207 admin.ID = (int)dataReader["ID"];
208 admin.Name = (string)dataReader["Name"];
209 admin.Password = (string)dataReader["Password"];
210 adminCollection.Add(admin);
211 }
212
213 return adminCollection;
214 }
215 catch
216 {
217 return null;
218 }
219 finally
220 {
221 dataReader.Close();
222 }
223 }
224 }
225}
2using System.Collections.Generic;
3using System.Text;
4using System.Data;
5using System.Data.SqlClient;
6using NGuestBook.IDAL;
7using NGuestBook.Entity;
8
9namespace NGuestBook.SQLServerDAL
10{
11 public class AdminDAL : IAdminDAL
12 {
13 /// <summary>
14 /// 插入管理员
15 /// </summary>
16 /// <param name="admin">管理员实体类</param>
17 /// <returns>是否成功</returns>
18 public bool Insert(AdminInfo admin)
19 {
20 SqlParameter[] parameters =
21 {
22 new SqlParameter("@Name",SqlDbType.NVarChar),
23 new SqlParameter("@Password",SqlDbType.NVarChar)
24 };
25 parameters[0].Value = admin.Name;
26 parameters[1].Value = admin.Password;
27 try
28 {
29 SQLServerDALHelper.ExecuteProcedureNonQurey("Pr_InsertAdmin", parameters);
30 return true;
31 }
32 catch
33 {
34 return false;
35 }
36 }
37
38 /// <summary>
39 /// 删除管理员
40 /// </summary>
41 /// <param name="id">欲删除的管理员的ID</param>
42 /// <returns>是否成功</returns>
43 public bool Delete(int id)
44 {
45 SqlParameter[] parameters =
46 {
47 new SqlParameter("@ID",SqlDbType.Int)
48 };
49 parameters[0].Value = id;
50 try
51 {
52 SQLServerDALHelper.ExecuteProcedureNonQurey("Pr_DeleteAdmin", parameters);
53 return true;
54 }
55 catch
56 {
57 return false;
58 }
59 }
60
61 ///<summary>
62 /// 更新管理员信息
63 /// </summary>
64 /// <param name="admin">管理员实体类</param>
65 /// <returns>是否成功</returns>
66 public bool Update(AdminInfo admin)
67 {
68 SqlParameter[] parameters =
69 {
70 new SqlParameter("@ID",SqlDbType.Int),
71 new SqlParameter("@Name",SqlDbType.NVarChar),
72 new SqlParameter("@Password",SqlDbType.NVarChar)
73 };
74 parameters[0].Value = admin.ID;
75 parameters[1].Value = admin.Name;
76 parameters[2].Value = admin.Password;
77 try
78 {
79 SQLServerDALHelper.ExecuteProcedureNonQurey("Pr_UpdateAdmin", parameters);
80 return true;
81 }
82 catch
83 {
84 return false;
85 }
86 }
87
88 /// <summary>
89 /// 按ID取得管理员信息
90 /// </summary>
91 /// <param name="id">管理员ID</param>
92 /// <returns>管理员实体类</returns>
93 public AdminInfo GetByID(int id)
94 {
95 SqlParameter[] parameters =
96 {
97 new SqlParameter("@ID",SqlDbType.Int)
98 };
99 parameters[0].Value = id;
100 SqlDataReader dataReader = null;
101 try
102 {
103 dataReader = SQLServerDALHelper.ExecuteProcedureReader("GetAdminByID", parameters);
104 dataReader.Read();
105 AdminInfo admin = new AdminInfo();
106 admin.ID = (int)dataReader["ID"];
107 admin.Name = (string)dataReader["Name"];
108 admin.Password = (string)dataReader["Password"];
109
110 return admin;
111 }
112 catch
113 {
114 return null;
115 }
116 finally
117 {
118 dataReader.Close();
119 }
120 }
121
122 /// <summary>
123 /// 按用户名及密码取得管理员信息
124 /// </summary>
125 /// <param name="name">用户名</param>
126 /// <param name="password">密码</param>
127 /// <returns>管理员实体类，不存在时返回null</returns>
128 public AdminInfo GetByNameAndPassword(string name, string password)
129 {
130 SqlParameter[] parameters =
131 {
132 new SqlParameter("@Name",SqlDbType.NVarChar),
133 new SqlParameter("@Password",SqlDbType.NVarChar)
134 };
135 parameters[0].Value = name;
136 parameters[1].Value = password;
137 SqlDataReader dataReader = null;
138 try
139 {
140 dataReader = SQLServerDALHelper.ExecuteProcedureReader("GetAdminByNameAndPassword", parameters);
141 dataReader.Read();
142 AdminInfo admin = new AdminInfo();
143 admin.ID = (int)dataReader["ID"];
144 admin.Name = (string)dataReader["Name"];
145 admin.Password = (string)dataReader["Password"];
146
147 return admin;
148 }
149 catch
150 {
151 return null;
152 }
153 finally
154 {
155 dataReader.Close();
156 }
157 }
158
159 /// <summary>
160 /// 按管理员名取得管理员信息
161 /// </summary>
162 /// <param name="name">管理员名</param>
163 /// <returns>管理员实体类</returns>
164 public AdminInfo GetByName(string name)
165 {
166 SqlParameter[] parameters =
167 {
168 new SqlParameter("@Name",SqlDbType.NVarChar)
169 };
170 parameters[0].Value = name;
171 SqlDataReader dataReader = null;
172 try
173 {
174 dataReader = SQLServerDALHelper.ExecuteProcedureReader("GetAdminByName", parameters);
175 dataReader.Read();
176 AdminInfo admin = new AdminInfo();
177 admin.ID = (int)dataReader["ID"];
178 admin.Name = (string)dataReader["Name"];
179 admin.Password = (string)dataReader["Password"];
180
181 return admin;
182 }
183 catch
184 {
185 return null;
186 }
187 finally
188 {
189 dataReader.Close();
190 }
191 }
192
193 /// <summary>
194 /// 取得全部管理员信息
195 /// </summary>
196 /// <returns>管理员实体类集合</returns>
197 public IList<AdminInfo> GetAll()
198 {
199 SqlDataReader dataReader = null;
200 try
201 {
202 dataReader = SQLServerDALHelper.ExecuteProcedureReader("GetAllAdmin", null);
203 IList<AdminInfo> adminCollection=new List<AdminInfo>();
204 while (dataReader.Read())
205 {
206 AdminInfo admin = new AdminInfo();
207 admin.ID = (int)dataReader["ID"];
208 admin.Name = (string)dataReader["Name"];
209 admin.Password = (string)dataReader["Password"];
210 adminCollection.Add(admin);
211 }
212
213 return adminCollection;
214 }
215 catch
216 {
217 return null;
218 }
219 finally
220 {
221 dataReader.Close();
222 }
223 }
224 }
225}
本文基于署名-非商业性使用 3.0许可协议发布，欢迎转载，演绎，但是必须保留本文的署名张洋（包含链接），且不得用于商业目的。如您有任何疑问或者授权方面的协商，请与我联系。
