基于C#+SQL Server2005（WinForm）图书管理系统

图书管理系统

一、 首先把数据库脚本贴出来(数据库名为library)

USE [library]
GO
/****** Object:  Table [dbo].[books]    Script Date: 06/12/2016 11:27:12 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[books]([bNum] [nvarchar](10) NOT NULL,[bName] [nvarchar](60) NOT NULL,[bAuthor] [nvarchar](60) NOT NULL,[bPubCom] [nvarchar](50) NOT NULL,[bPubDat] [nvarchar](20) NOT NULL,[ISBN] [nvarchar](50) NOT NULL,[bPrice] [nvarchar](10) NOT NULL,[bTag] [nvarchar](10) NOT NULL,CONSTRAINT [PK_books] PRIMARY KEY CLUSTERED 
([bNum] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
) ON [PRIMARY]
GO
INSERT [dbo].[books] ([bNum], [bName], [bAuthor], [bPubCom], [bPubDat], [ISBN], [bPrice], [bTag]) VALUES (N'000001', N'数据库', N'123', N'123出版社', N'2012-09', N'978-1-23465-8', N'56', N'2')
INSERT [dbo].[books] ([bNum], [bName], [bAuthor], [bPubCom], [bPubDat], [ISBN], [bPrice], [bTag]) VALUES (N'000002', N'编程珠玑', N'Jon·Bentley', N'人民邮电出版社', N'2015-01', N'978-7-115-35761-8', N'39', N'5')
INSERT [dbo].[books] ([bNum], [bName], [bAuthor], [bPubCom], [bPubDat], [ISBN], [bPrice], [bTag]) VALUES (N'000003', N'C陷阱与缺陷', N'Andrew·Koeing', N'人民邮电出版社', N'2009-09', N'978-7-115-17179-5', N'30', N'5')
INSERT [dbo].[books] ([bNum], [bName], [bAuthor], [bPubCom], [bPubDat], [ISBN], [bPrice], [bTag]) VALUES (N'000004', N'C专家编程', N'Peter Van Der Linden', N'人民邮电出版社', N'2009-09', N'978-7-115-17108-1', N'45', N'5')
INSERT [dbo].[books] ([bNum], [bName], [bAuthor], [bPubCom], [bPubDat], [ISBN], [bPrice], [bTag]) VALUES (N'000005', N'Python网络数据采集', N'Ryan Mitchell', N'人民邮电出版社', N'2016-03', N'978-7-115-41629-2', N'59', N'4')
INSERT [dbo].[books] ([bNum], [bName], [bAuthor], [bPubCom], [bPubDat], [ISBN], [bPrice], [bTag]) VALUES (N'000006', N'Flask Web开发', N'Miguel Grinberg', N'人民邮电出版社', N'2015-01', N'978-7-115-37399-1', N'59', N'5')
INSERT [dbo].[books] ([bNum], [bName], [bAuthor], [bPubCom], [bPubDat], [ISBN], [bPrice], [bTag]) VALUES (N'000007', N'C和指针', N'Kenneth A·Reek', N'人民邮电出版社', N'2009-12', N'978-7-115-17201-3', N'65', N'4')
INSERT [dbo].[books] ([bNum], [bName], [bAuthor], [bPubCom], [bPubDat], [ISBN], [bPrice], [bTag]) VALUES (N'000008', N'汇编语言', N'王爽', N'清华大学出版社', N'2015-05', N'978-7-302-33314-2', N'36', N'5')
INSERT [dbo].[books] ([bNum], [bName], [bAuthor], [bPubCom], [bPubDat], [ISBN], [bPrice], [bTag]) VALUES (N'000009', N'Python Cookbook', N'David Beazley & Brian K.Jones', N'人民邮电出版社', N'2015-05', N'978-7-115-37959-7', N'108', N'4')
INSERT [dbo].[books] ([bNum], [bName], [bAuthor], [bPubCom], [bPubDat], [ISBN], [bPrice], [bTag]) VALUES (N'000010', N'Python基础教程', N'Magnue Lie Hetland', N'人民邮电出版社', N'2015-09', N'978-7-115-35352-8', N'79', N'5')
INSERT [dbo].[books] ([bNum], [bName], [bAuthor], [bPubCom], [bPubDat], [ISBN], [bPrice], [bTag]) VALUES (N'000011', N'程序员代码面试指南', N'左程云', N'电子工业出版社', N'2015-09', N'978-7-121-27011-6', N'79', N'5')
INSERT [dbo].[books] ([bNum], [bName], [bAuthor], [bPubCom], [bPubDat], [ISBN], [bPrice], [bTag]) VALUES (N'000012', N'CLR via C#', N'Jeffrey Richter', N'清华大学出版社', N'2015-05', N'978-7-302-38097-9', N'109', N'5')
INSERT [dbo].[books] ([bNum], [bName], [bAuthor], [bPubCom], [bPubDat], [ISBN], [bPrice], [bTag]) VALUES (N'000013', N'大国崛起', N'唐晋', N'人民出版社', N'2011-03', N'7-01-006006-1', N'56', N'5')
INSERT [dbo].[books] ([bNum], [bName], [bAuthor], [bPubCom], [bPubDat], [ISBN], [bPrice], [bTag]) VALUES (N'000014', N'自控力', N'凯利·麦格尼格尔', N'文化发展出版社', N'2012-08', N'978-7-5142-0503-9', N'39.8', N'5')
INSERT [dbo].[books] ([bNum], [bName], [bAuthor], [bPubCom], [bPubDat], [ISBN], [bPrice], [bTag]) VALUES (N'000015', N'麦肯锡思维', N'Rob Koplowitz', N'企业管理出版社', N'2012-08', N'978-7-5164-1050-9', N'39.8', N'5')
INSERT [dbo].[books] ([bNum], [bName], [bAuthor], [bPubCom], [bPubDat], [ISBN], [bPrice], [bTag]) VALUES (N'000016', N'哈佛谈判心理学', N'Rrica Ariel Fox', N'中国友谊出版公司', N'2014-11', N'978-7-5057-3422-7', N'49.8', N'5')
INSERT [dbo].[books] ([bNum], [bName], [bAuthor], [bPubCom], [bPubDat], [ISBN], [bPrice], [bTag]) VALUES (N'000017', N'领导力21法则', N'John C Maxwell', N'时代出版传媒股份有限公司', N'2016-01', N'978-7-5699-0647-9', N'45', N'5')
INSERT [dbo].[books] ([bNum], [bName], [bAuthor], [bPubCom], [bPubDat], [ISBN], [bPrice], [bTag]) VALUES (N'000018', N'斯坦福极简经济学', N'Timothy Taylor', N'湖南人民出版社', N'2015-02', N'978-7-5561-0739-1', N'35', N'5')
INSERT [dbo].[books] ([bNum], [bName], [bAuthor], [bPubCom], [bPubDat], [ISBN], [bPrice], [bTag]) VALUES (N'000019', N'拖延心理学', N'Jane B Birka & Lenora M Yuen', N'中国人民大学出版社', N'2009-12', N'978-7-300-11390-6', N'39.8', N'5')
INSERT [dbo].[books] ([bNum], [bName], [bAuthor], [bPubCom], [bPubDat], [ISBN], [bPrice], [bTag]) VALUES (N'000020', N'英语魔法师之语法俱乐部', N'旋元佑', N'九州出版社', N'2001-05', N'7-80114-627-1', N'35', N'5')
INSERT [dbo].[books] ([bNum], [bName], [bAuthor], [bPubCom], [bPubDat], [ISBN], [bPrice], [bTag]) VALUES (N'000021', N'赖世雄美语音标', N'赖世雄', N'外文出版社', N'2016-05', N'978-7-119-08680-4', N'20', N'5')
INSERT [dbo].[books] ([bNum], [bName], [bAuthor], [bPubCom], [bPubDat], [ISBN], [bPrice], [bTag]) VALUES (N'000022', N'人性的弱点', N'戴尔·卡耐基', N'人民日报出版社', N'2015-05', N'978-7-5115-3089-9', N'29.8', N'5')
INSERT [dbo].[books] ([bNum], [bName], [bAuthor], [bPubCom], [bPubDat], [ISBN], [bPrice], [bTag]) VALUES (N'000023', N'重新定义公司 谷歌是如何运营的', N'Eric Schmidt & Jonethan Rosenberg & Alan Eagle', N'中信出版集团', N'2015-09', N'978-7-5086-5359-4', N'49', N'5')
INSERT [dbo].[books] ([bNum], [bName], [bAuthor], [bPubCom], [bPubDat], [ISBN], [bPrice], [bTag]) VALUES (N'000024', N'从0到1 开启商业与未来的秘密', N'Peter Thiel', N'中信出版社', N'2015-01', N'978-7-5086-4971-9', N'45', N'5')
INSERT [dbo].[books] ([bNum], [bName], [bAuthor], [bPubCom], [bPubDat], [ISBN], [bPrice], [bTag]) VALUES (N'000025', N'代码大全2', N'Steven McConnell', N'电子工业出版社', N'2015-06', N'978-7-121-02298-2', N'128', N'0')
INSERT [dbo].[books] ([bNum], [bName], [bAuthor], [bPubCom], [bPubDat], [ISBN], [bPrice], [bTag]) VALUES (N'000026', N'胡适的北大哲学课 壹古代哲学', N'胡适', N'新世界出版社', N'2014-04', N'978-7-5104-4841-6', N'30', N'3')
INSERT [dbo].[books] ([bNum], [bName], [bAuthor], [bPubCom], [bPubDat], [ISBN], [bPrice], [bTag]) VALUES (N'000027', N'胡适的北大哲学课 贰中古哲学', N'胡适', N'新世界出版社', N'2014-04', N'978-7-5104-4841-6', N'30', N'3')
INSERT [dbo].[books] ([bNum], [bName], [bAuthor], [bPubCom], [bPubDat], [ISBN], [bPrice], [bTag]) VALUES (N'000028', N'胡适的北大哲学课 叁近世哲学', N'胡适', N'新世界出版社', N'2014-04', N'978-7-5104-4841-6', N'30', N'3')
INSERT [dbo].[books] ([bNum], [bName], [bAuthor], [bPubCom], [bPubDat], [ISBN], [bPrice], [bTag]) VALUES (N'000029', N'胡适的北大哲学课 肆世界哲学', N'胡适', N'新世界出版社', N'2014-04', N'978-7-5104-4841-6', N'30', N'3')
/****** Object:  Table [dbo].[admin]    Script Date: 06/12/2016 11:27:12 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[admin]([aId] [nvarchar](20) NOT NULL,[aPwd] [nvarchar](20) NOT NULL,[aName] [nvarchar](20) NOT NULL,[aGender] [nvarchar](20) NOT NULL,[aPhoNum] [nvarchar](20) NOT NULL,CONSTRAINT [PK_admin] PRIMARY KEY CLUSTERED 
([aId] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
) ON [PRIMARY]
GO
INSERT [dbo].[admin] ([aId], [aPwd], [aName], [aGender], [aPhoNum]) VALUES (N'1', N'1', N'张三', N'男', N'12345678999')
INSERT [dbo].[admin] ([aId], [aPwd], [aName], [aGender], [aPhoNum]) VALUES (N'111111', N'111111', N'李四', N'女', N'12311112222')
INSERT [dbo].[admin] ([aId], [aPwd], [aName], [aGender], [aPhoNum]) VALUES (N'2', N'2', N'张三', N'男', N'12311111111')
INSERT [dbo].[admin] ([aId], [aPwd], [aName], [aGender], [aPhoNum]) VALUES (N'222222', N'222222', N'李四', N'女', N'12322221111')
/****** Object:  Table [dbo].[borrow]    Script Date: 06/12/2016 11:27:12 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
SET ANSI_PADDING ON
GO
CREATE TABLE [dbo].[borrow]([ID] [nvarchar](50) NOT NULL,[uId] [nvarchar](20) NOT NULL,[bName] [nvarchar](60) NOT NULL,[bNum] [nvarchar](10) NOT NULL,[bPrice] [nvarchar](10) NOT NULL,[borrowDate] [varchar](20) NOT NULL,[returnDate] [varchar](20) NOT NULL,[Tag] [nvarchar](10) NOT NULL,CONSTRAINT [PK_borrow] PRIMARY KEY CLUSTERED 
([ID] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
) ON [PRIMARY]
GO
SET ANSI_PADDING OFF
GO
INSERT [dbo].[borrow] ([ID], [uId], [bName], [bNum], [bPrice], [borrowDate], [returnDate], [Tag]) VALUES (N'000001', N'2', N'C专家编程', N'000004', N'45', N'2016/06/10', N'2016/09/08', N'0')
INSERT [dbo].[borrow] ([ID], [uId], [bName], [bNum], [bPrice], [borrowDate], [returnDate], [Tag]) VALUES (N'000003', N'2', N'数据库', N'000001', N'56', N'2016/06/10', N'2016/08/09', N'0')
INSERT [dbo].[borrow] ([ID], [uId], [bName], [bNum], [bPrice], [borrowDate], [returnDate], [Tag]) VALUES (N'000005', N'2', N'数据库', N'000001', N'56', N'2016/06/10', N'2016/08/09', N'0')
INSERT [dbo].[borrow] ([ID], [uId], [bName], [bNum], [bPrice], [borrowDate], [returnDate], [Tag]) VALUES (N'000006', N'2', N'数据库', N'000001', N'56', N'2016/06/10', N'2016/08/09', N'0')
INSERT [dbo].[borrow] ([ID], [uId], [bName], [bNum], [bPrice], [borrowDate], [returnDate], [Tag]) VALUES (N'000007', N'2', N'Python网络数据采集', N'000005', N'59', N'2016/06/10', N'2016/09/08', N'0')
INSERT [dbo].[borrow] ([ID], [uId], [bName], [bNum], [bPrice], [borrowDate], [returnDate], [Tag]) VALUES (N'000008', N'2', N'C和指针', N'000007', N'65', N'2016/06/10', N'2016/09/08', N'0')
INSERT [dbo].[borrow] ([ID], [uId], [bName], [bNum], [bPrice], [borrowDate], [returnDate], [Tag]) VALUES (N'000009', N'2', N'Python Cookbook', N'000009', N'108', N'2016/06/10', N'2016/08/09', N'0')
/****** Object:  Table [dbo].[users]    Script Date: 06/12/2016 11:27:12 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[users]([uId] [nvarchar](20) NOT NULL,[uPwd] [nvarchar](20) NOT NULL,[uName] [nvarchar](20) NOT NULL,[uGender] [nvarchar](20) NOT NULL,[uPhoNum] [nvarchar](20) NOT NULL,[uBan] [nvarchar](20) NOT NULL,CONSTRAINT [PK_users] PRIMARY KEY CLUSTERED 
([uId] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
) ON [PRIMARY]
GO
INSERT [dbo].[users] ([uId], [uPwd], [uName], [uGender], [uPhoNum], [uBan]) VALUES (N'1', N'1', N'张三', N'男', N'12345678999', N'0')
INSERT [dbo].[users] ([uId], [uPwd], [uName], [uGender], [uPhoNum], [uBan]) VALUES (N'111111', N'111111', N'李四', N'女', N'11122221111', N'0')
INSERT [dbo].[users] ([uId], [uPwd], [uName], [uGender], [uPhoNum], [uBan]) VALUES (N'123456', N'123456', N'李四', N'女', N'12312341234', N'1')
INSERT [dbo].[users] ([uId], [uPwd], [uName], [uGender], [uPhoNum], [uBan]) VALUES (N'2', N'2', N'王五', N'男', N'12312313123', N'0')
INSERT [dbo].[users] ([uId], [uPwd], [uName], [uGender], [uPhoNum], [uBan]) VALUES (N'333333', N'333333', N'张三', N'男', N'12311112222', N'0')
INSERT [dbo].[users] ([uId], [uPwd], [uName], [uGender], [uPhoNum], [uBan]) VALUES (N'a123456', N'a123456', N'王五', N'女', N'12312341234', N'0')
/****** Object:  StoredProcedure [dbo].[Date_Test]    Script Date: 06/12/2016 11:27:12 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
create proc [dbo].[Date_Test]
as  
select uId into #A from borrow where convert(varchar(20),GETDATE(),111)>= returnDate group by uId
update borrow set Tag='1' where convert(varchar(20),GETDATE(),111)>= returnDate
update users set uBan='1' where uId in(select uId from #A)
drop table #A
GO
/****** Object:  View [dbo].[booksWithbookindex]    Script Date: 06/12/2016 11:27:12 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
create view [dbo].[booksWithbookindex]
as
select ROW_NUMBER()over(order by bNum ) as bookindex,* from books
GO

二、 定义一个MyDictionary类 和 定义一个SqlHelper类（封装复杂的SQL操作）

namespace 图书管理系统
{// 因为要频繁使用Dictionary<string, string> // 所以用一个自定义类MyDictionary继承Dictionary<string, string> public class MyDictionary : Dictionary<string, string>{}
}

namespace 图书管理系统
{public static class SqlHelper{// 获取数据库连接   返回连接对象private static SqlConnection GetConn(){return new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["library"].ConnectionString);}// 执行sql操作   返回是否存在用户public static bool IsUserExists(string uId){bool isExists = false;using (SqlConnection conn = GetConn()){string sql = "select count(*) from users where uId =@uId";SqlCommand cmd = new SqlCommand(sql, conn);cmd.Parameters.Add(new SqlParameter("@uId", uId));conn.Open();int obj = Convert.ToInt32(cmd.ExecuteScalar());// 返回受影响的行数if (obj > 0){isExists = true;}}return isExists;}// 执行sql操作   返回是否存在书名public static bool IsBookExistsWithName(string bName){bool isExists = false;using (SqlConnection conn = GetConn()){string sql = "select count(*) from books where bName =@bName";SqlCommand cmd = new SqlCommand(sql, conn);cmd.Parameters.Add(new SqlParameter("@bName", bName));conn.Open();int obj = Convert.ToInt32(cmd.ExecuteScalar());// 返回受影响的行数if (obj > 0){isExists = true;}}return isExists;}// 执行sql操作   返回是否存在此书籍序列号public static bool IsBookExistsWithNum(string bNum){bool isExists = false;using (SqlConnection conn = GetConn()){string sql = "select count(*) from books where bNum =@bNum";SqlCommand cmd = new SqlCommand(sql, conn);cmd.Parameters.Add(new SqlParameter("@bNum", bNum));conn.Open();int obj = Convert.ToInt32(cmd.ExecuteScalar());// 返回受影响的行数if (obj > 0){isExists = true;}}return isExists;}// 执行 ...   返回受影响行数private static int ExecuteNonQuery(string sql, CommandType type, params SqlParameter[] ps){int rows = -1;using (SqlConnection conn = GetConn()){SqlCommand cmd = new SqlCommand(sql, conn);cmd.CommandType = type; // 存储过程 type为StoredProcedurecmd.Parameters.AddRange(ps);conn.Open();rows = cmd.ExecuteNonQuery();}return rows;}public static int ExecuteNonQuery(string sql, MyDictionary  dic){SqlParameter[] ps = new SqlParameter[dic.Count];int index = 0;foreach (var item in dic){ps[index++] = new SqlParameter(item.Key, item.Value);}return ExecuteNonQuery(sql, CommandType.Text, ps);}public static int ExecuteNonQuery(string sql, CommandType type, MyDictionary dic){SqlParameter[] ps = new SqlParameter[dic.Count];int index = 0;foreach (var item in dic){ps[index++] = new SqlParameter(item.Key, item.Value);}return ExecuteNonQuery(sql, type, ps);}// 执行sql语句   返回首行首列public static object ExecuteScalar(string sql){object obj = null;using (SqlConnection conn = GetConn()){SqlCommand cmd = new SqlCommand(sql, conn);conn.Open();obj = cmd.ExecuteScalar();}return obj;}public static object ExecuteScalar(string sql, CommandType type, MyDictionary dic){object obj = null;using (SqlConnection conn = GetConn()){SqlCommand cmd = new SqlCommand(sql, conn);cmd.CommandType = type;//构造参数SqlParameter[] ps = new SqlParameter[dic.Count];int index = 0;foreach (var item in dic){ps[index++] = new SqlParameter(item.Key, item.Value);}cmd.Parameters.AddRange(ps);//执行命令conn.Open();obj = cmd.ExecuteScalar();}return obj;}public static object ExecuteScalar(string sql, MyDictionary dic){return ExecuteScalar(sql, CommandType.Text, dic);}// 执行查询  返回结果集DataTable  获取列表public static DataTable GetList(string sql, MyDictionary  dic){// 构造数据表，用于存储查询的数据DataTable dt = new DataTable();// 创建连接对象using (SqlConnection conn = GetConn()){// 执行命令SqlCommand cmd = new SqlCommand(sql, conn);// 构造参数SqlParameter[] ps = new SqlParameter[dic.Count];int index = 0;foreach (var item in dic){ps[index++] = new SqlParameter(item.Key, item.Value);}cmd.Parameters.AddRange(ps);// 执行命令SqlDataAdapter adapter = new SqlDataAdapter(cmd);adapter.Fill(dt);}return dt;}}
}

三、 各个窗体及实现

1.登陆

namespace 图书管理系统
{public partial class LoginForm : Form{public LoginForm(){InitializeComponent();}private void button1_Click(object sender, EventArgs e){// 获取账号string Id = txtId.Text.Trim();// 获取密码string Pwd = txtPwd.Text.Trim();if (Id == "" || Pwd == ""){MessageBox.Show("请输入账号或密码");}else {string str = System.Configuration.ConfigurationManager.ConnectionStrings["library"].ConnectionString;// 构造sql查询语句string sql;if (rBtn1.Checked == true){sql = "select uName from users where uId='" + Id + "' and uPwd='" + Pwd + "'";}else {sql = "select aName from admin where aId='" + Id + "' and aPwd='" + Pwd + "'";}// 构造连接对象using (SqlConnection conn = new SqlConnection(str))       {SqlCommand cmd = new SqlCommand(sql, conn);// 打开数据库连接conn.Open();                                          // 执行查询语句,返回结果集第一行第一列string name = cmd.ExecuteScalar().ToString ();       if (name != ""){// 登录窗体隐藏this.Hide();// 创建主窗体MainForm mainForm = new MainForm();// 将账号传给主窗体MainFormmainForm.Id = Id;// 用主窗体MainForm下的_Tag标记登陆的是用户还是管理员if (rBtn1.Checked == true)                   {mainForm._Tag = "user";mainForm.Name1 = name;sql = "select uBan from users where uId='" + Id + "' and uPwd='" + Pwd + "'";cmd = new SqlCommand(sql, conn);string b = cmd.ExecuteScalar().ToString();mainForm.B = b;}else{mainForm._Tag = "admin";mainForm.Name1 = name;}// 显示主窗体mainForm.ShowDialog();                         }else {MessageBox.Show("账号或密码错误！","登录失败");}}}}}
}

2.主界面

namespace 图书管理系统
{public partial class MainForm : Form{public MainForm(){InitializeComponent();}private string _id;// 账号public string Id{get { return _id; }set { _id = value; }}private string _name;public string Name1 // 姓名{get { return _name; }set { _name = value; }}// 权限标记 值为admin为管理员 ，值为user则为普通用户private string _tag;public string _Tag{get { return _tag; }set { _tag = value; }}// 标记账户是否被锁定  1为锁定 private string _b;  public string B{get { return _b; }set { _b = value; }}// 在加载窗体时设定操作权限private void MainForm_Load(object sender, EventArgs e){if (_Tag == "user"){tSSL2.Text = "权限级别：普通用户";tSSL5.Text = "   " + Name1;// 权限为用户时 将部分功能关闭新用户注册.Enabled = false;锁定用户.Enabled = false;新书入库.Enabled = false;借书.Enabled = false;还书.Enabled = false;书籍注销.Enabled = false;用户信息查询.Enabled = false;添加用户.Enabled = false;添加书籍.Enabled = false;借书办理.Enabled = false;还书办理.Enabled = false;if (B == "1"){toolStripStatusLabel3.Text = " 状态：被锁定";MessageBox.Show("账户被锁定，请尽快联系管理员", "警告");}}else{tSSL2.Text = "权限级别：管理员";tSSL5.Text = "   " + Name1;} }#region 关于、帮助private void 关于软件ToolStripMenuItem_Click(object sender, EventArgs e){MessageBox.Show("请联系管理员", "关于");}private void toolStripButton6_Click(object sender, EventArgs e){MessageBox.Show("请联系管理员", "注意");}#endregion// 时钟private void timer1_Tick(object sender, EventArgs e){xxx.Text = DateTime.Now.ToString();}// 退出时关闭所有窗口（login）private void MainForm_FormClosed(object sender, FormClosedEventArgs e){Application.Exit(); }#region 修改密码private void APF(){AlterPwdForm altPF = new AlterPwdForm();altPF.Id = Id;altPF._Tag = _Tag;altPF.ShowDialog();}private void 修改密码_Click(object sender, EventArgs e){APF();}private void toolStripButton8_Click(object sender, EventArgs e){APF();}#endregion#region 修改个人信息private void UIF(){UpdateIndivForm uIF = new UpdateIndivForm();uIF.Id = Id;uIF._Tag = _Tag;uIF.ShowDialog();}private void 修改信息_Click(object sender, EventArgs e){UIF();}private void toolStripButton7_Click(object sender, EventArgs e){UIF();}#endregion#region 添加用户private void NewUser(){UpdateIndivForm uIF = new UpdateIndivForm();uIF.Id = Id;uIF._Tag = _Tag;uIF.P = "1";uIF.Text = "新用户注册";uIF.ShowDialog();}private void 添加用户_Click(object sender, EventArgs e){NewUser();}private void 新用户注册_Click(object sender, EventArgs e){NewUser();}#endregion#region 注销用户private void 注销用户_Click(object sender, EventArgs e){UpdateIndivForm deleteForm = new UpdateIndivForm();deleteForm.Text = "注销用户";deleteForm.P = "2";deleteForm.ShowDialog();}#endregion#region 添加书籍private static void INB(){新书入库Form iNB = new 新书入库Form();iNB.ShowDialog();}private void 添加书籍_Click(object sender, EventArgs e){INB();}private void 新书入库_Click(object sender, EventArgs e){INB();}#endregion#region 书籍注销private void 书籍注销_Click(object sender, EventArgs e){新书入库Form iNB = new 新书入库Form();iNB.P = "1";iNB.Text = "注销书籍";iNB.ShowDialog();}#endregion#region 书籍查询private void 图书查询_Click(object sender, EventArgs e){FindBookForm fbf = new FindBookForm();fbf.ShowDialog();}private void 查找书籍_Click(object sender, EventArgs e){FindBookForm fbf = new FindBookForm();fbf.Tag1 = this._Tag;fbf.ShowDialog();}#endregion#region 借书办理private void 借书办理_Click(object sender, EventArgs e){BorrowBooks bb = new BorrowBooks();bb.ShowDialog();}private void 借书_Click(object sender, EventArgs e){BorrowBooks bb = new BorrowBooks();bb.ShowDialog();}        #endregion#region 还书办理private void 还书办理_Click(object sender, EventArgs e){ReturnBooks rb = new ReturnBooks();rb.ShowDialog();}private void 还书_Click(object sender, EventArgs e){ReturnBooks rb = new ReturnBooks();rb.ShowDialog();}        #endregion#region 借书单查询private void 借书单查询_Click(object sender, EventArgs e){MessageBox.Show("功能暂未开放");}private void 查询借书记录_Click(object sender, EventArgs e){MessageBox.Show("功能暂未开放");}        #endregionprivate void 用户信息查询_Click(object sender, EventArgs e){MessageBox.Show("该功能暂未开放");}}
}

3.新用户注册、修改个人信息、注销用户界面在同一个窗体

namespace 图书管理系统
{public partial class UpdateIndivForm : Form{public UpdateIndivForm(){InitializeComponent();}private string _id;public string Id{get { return _id; }set { _id = value; }}// 权限标记 值admin为管理员 ，值为user则为普通用户private string _tag;public string _Tag{get { return _tag; }set { _tag = value; }}// P标记用来决定是否隐藏panelprivate string _p;public string P{get { return _p; }set { _p = value; }}// 加载个人信息private void UpdateIndivForm_Load(object sender, EventArgs e){if (P == "1")       // p == "1"  为注册新用户功能{注册用户panel.Visible = true;注销用户panel.Visible = false;}else if (P == "2")  // p == "2"  为注销用户功能{}else                //          为修改个人信息{注册用户panel.Visible = false;注销用户panel.Visible = false ;string str = System.Configuration.ConfigurationManager.ConnectionStrings["library"].ConnectionString;string sql;if (_Tag == "user"){sql = "select * from users where uId='" + Id + "'";}else{sql = "select * from admin where aId='" + Id + "'";}using (SqlConnection conn = new SqlConnection(str)){SqlCommand cmd = new SqlCommand(sql, conn);conn.Open();// ExecuteReader()返回一个Datareader对象，内容是与命令匹配的所有行using (SqlDataReader r = cmd.ExecuteReader()){r.Read();账号textBox.Text = r.GetString(0);姓名textBox.Text = r.GetString(2);电话号码textBox.Text = r.GetString(4);if (_Tag == "user"){if (r.GetString(5) == "1"){label7.Text = "被锁定,请尽快联系管理员办理解锁";}else{label7.Text = "正常";}}else{label7.Text = "正常";}if (r.GetString(3) == "男"){男radioButton.Checked = true;}else{女radioButton.Checked = true;}}cmd.Dispose();}提交button.Visible = false;}}#region 提交修改个人信息  private void 姓名textBox_TextChanged(object sender, EventArgs e){提交button.Visible = true;}private void 账号textBox_TextChanged(object sender, EventArgs e){if (账号textBox.Text!= Id){提交button.Visible = true;}else{提交button.Visible = false;}}private void 男radioButton_CheckedChanged(object sender, EventArgs e){提交button.Visible = true;}private void 电话号码textBox_TextChanged(object sender, EventArgs e){提交button.Visible = true;}private void 提交button_Click(object sender, EventArgs e){ // 判断账号是否存在if (账号textBox.Text != Id){if (SqlHelper.IsUserExists(uIdTb.Text.Trim())){MessageBox.Show("账号已存在", "操作失败");return;}}// 完成用户的修改string uName = 姓名textBox.Text.Trim();string uId = 账号textBox.Text.Trim();string uPhoNum = 电话号码textBox.Text.Trim();string uGender;if (男radioButton.Checked == true){uGender = "男";}else{uGender = "女";}// 构造sql语句string sql;if (_Tag == "user"){sql = "update users set uId =@uId,uName=@uName,uGender=@uGender,uPhoNum=@uPhoNum where uId=@ID";}else{sql = "update admin set aId =@uId,aName=@uName,aGender=@uGender,aPhoNum=@uPhoNum where aId=@ID";}MyDictionary dic = new MyDictionary();dic.Add("@uId", uId);dic.Add("@uName", uName);dic.Add("@uGender", uGender);dic.Add("@uPhoNum", uPhoNum);dic.Add("@ID", Id);// 执行并返回int i = SqlHelper.ExecuteNonQuery(sql, dic);if (i == 1){MessageBox.Show("提交完成");}this.Close();}       #endregionprivate void 注册完成button_Click(object sender, EventArgs e){string uGender = "";if (uIdTb.Text.Trim().Length < 6){MessageBox.Show("账号长度应该大于6");}else if (uPwdTb.Text.Trim().Length < 6){MessageBox.Show("密码长度应该大于6");}else if (uNameTb.Text.Trim().Length < 2 || uNameTb.Text.Trim().Length > 15){MessageBox.Show("姓名长度应该大于1并且小于等于15");}else if (注册rBtn男.Checked == false && 注册rBtn女.Checked == false){MessageBox.Show("请选择性别");}else if (Regex.IsMatch(uPhoNumTb.Text.Trim(), @"^1\d{10}$") != true && Regex.IsMatch(uPhoNumTb.Text.Trim(), @"^(\d{3,4}-)?\d{6,8}$") != true){MessageBox.Show("请输入合法的手机号码或电话号码");}else{// 判断判断账号是否存在if (SqlHelper.IsUserExists(uIdTb.Text.Trim())){MessageBox.Show("账号已存在","操作失败");return;}if(注册rBtn男.Checked == true ){uGender ="男";}else {uGender ="女";}// 添加新用户string sql = "insert into users(uId,uPwd,uName,uGender,uPhoNum,uBan) values(@id,@pwd,@name,@gender,@phonum,'0')";MyDictionary  dic = new MyDictionary ();dic.Add("@id", uIdTb.Text.Trim());dic.Add("@pwd", uPwdTb.Text.Trim());dic.Add("@name", uNameTb.Text.Trim());dic.Add("@gender", uGender);dic.Add("@phonum", uPhoNumTb.Text.Trim());int i = SqlHelper.ExecuteNonQuery(sql, dic);if (i == 1){MessageBox.Show("成功注册新用户");this.Close();}else{MessageBox.Show("操作失败,请联系管理员");}}}private void 注销Btn_Click(object sender, EventArgs e){// 判断账号是否存在if (!SqlHelper.IsUserExists(deletTB.Text.Trim())){MessageBox.Show("账号不存在", "操作失败");return;}else{DialogResult dt = MessageBox.Show("确定要注销此用户吗", "提示", MessageBoxButtons.OKCancel);if (dt != DialogResult.OK){return;}else{string sql = "delete from users where uId=@id";MyDictionary dic = new MyDictionary();dic.Add("@id", deletTB.Text.Trim());int i = SqlHelper.ExecuteNonQuery(sql, dic);if (i == 1){MessageBox.Show("注销成功");}}this.Close();}}}
}

4.修改密码界面

namespace 图书管理系统
{public partial class AlterPwdForm : Form{public AlterPwdForm(){InitializeComponent();}private string _id;public string Id{get { return _id; }set { _id = value; }}// 权限标记 值admin为管理员 ，值为user则为普通用户private string _tag;public string _Tag{get { return _tag; }set { _tag = value; }}private void APbtn_Click(object sender, EventArgs e){string sql;if (textBox1.Text.Trim() == "" || textBox2.Text.Trim() == "" || textBox3.Text.Trim() == ""){MessageBox.Show("请填写完整", "警告");}else if (textBox2.Text.Trim().Length < 6 || textBox3.Text.Trim().Length < 6){MessageBox.Show("新密码长度必须大于六位", "提示");}else if (textBox2.Text.Trim() != textBox3.Text.Trim()){MessageBox.Show("两次输入的新密码不一致","警告");}else{if (_Tag == "user"){sql = "update users set uPwd =@uPwd where uId=@uId and uPwd=@uPwdd";}else{sql = "update admin set aPwd = @uPwd where aId=@uId and aPwd=@uPwdd";}MyDictionary dic1 = new MyDictionary();dic1.Add("@uPwd", textBox2.Text.Trim());dic1.Add("@uId", Id.ToString());dic1.Add("@uPwdd", textBox1.Text.Trim());int n = SqlHelper.ExecuteNonQuery(sql, dic1);if (n > 0){MessageBox.Show("修改成功", "OK");this.Close();}else{MessageBox.Show("密码错误", "警告");}}}}
}

5.借书办理窗口

namespace 图书管理系统
{public partial class BorrowBooks : Form{public BorrowBooks(){InitializeComponent();}private void 查书btn_Click(object sender, EventArgs e){if (查寻书名tB.Text.Trim() == ""){MessageBox.Show("书名不能为空");}else {string sql = "select bNum,bName,bAuthor,bPubCom,bPrice,bTag from booksWithbookindex where bName like '%'+ @bName +'%'";MyDictionary dic = new MyDictionary();dic.Add("@bName", 查寻书名tB.Text.Trim());DataTable dt = SqlHelper.GetList(sql, dic);dataGridView1.DataSource = dt;}}private void 提交借书_Click(object sender, EventArgs e){// 是否存在该用户if (uIdTb.Text.Trim() == ""|| comboBox1.Text.ToString().Trim() == ""){MessageBox.Show("请填写用户名和借阅时间！", "警告");return;}else if (bNumTB.Text.Trim() == "" || bNameTB.Text.Trim() == "" || bPriceTB.Text.Trim() == ""){MessageBox.Show("请选择书籍！","警告");}else if (!SqlHelper.IsUserExists(uIdTb.Text.Trim())){MessageBox.Show("不存在该用户！", "警告");return;}else{// 自动获得图书序列号string sql = " select COUNT(*)+1 from borrow";string ID = SqlHelper.ExecuteScalar(sql).ToString();StringBuilder sb = new StringBuilder(ID);while (sb.Length != 6){sb.Insert(0, "0");}ID = sb.ToString();// 查询书籍库存量sql = "select bTag from books where bNum=@bNum";MyDictionary dic1 = new MyDictionary();dic1.Add("@bNum", bNumTB.Text.Trim());string n = SqlHelper.ExecuteScalar(sql, dic1).ToString();if (n == "0"){MessageBox.Show("该书籍库存量为零！","警告");return ;}// 插入数据到借书表（borrow）sql = "insert into borrow values(@ID,@uId,@bName,@bNum,@bPrice,convert(varchar(20),GETDATE() ,111),convert(varchar(20),dateadd(day," + comboBox1.Text.ToString().Substring(0, 2) + ",CONVERT(varchar(20),GETDATE() ,111)),111),@Tag)";MyDictionary dic = new MyDictionary();dic.Add("@ID", ID);dic.Add("@uId", uIdTb.Text.Trim());dic.Add("@bName", bNameTB.Text.Trim());dic.Add("@bNum", bNumTB.Text.Trim());dic.Add("@bPrice", bPriceTB.Text.Trim());dic.Add("@Tag", "0");// Tag = 0 标记该书未超归还期限 int i = SqlHelper.ExecuteNonQuery(sql, dic);if (i > 0){n = (Convert.ToInt32(n) - 1).ToString(); // 库存量-1sql = "update books set bTag=@bTag where bNum=@bNum";MyDictionary dic2 = new MyDictionary();dic2.Add("@bTag", n);dic2.Add("@bNum", bNumTB.Text.Trim());SqlHelper.ExecuteScalar(sql, dic2);MessageBox.Show("提交成功");}}}// 表格单元格鼠标MouseUp事件private void dataGridView1_CellMouseUp(object sender, DataGridViewCellMouseEventArgs e){// 开关文本框的锁定，将表格内的数据显示到文本框内int a = dataGridView1.CurrentRow.Index;bNumTB.ReadOnly = false;bNameTB.ReadOnly = false;bPriceTB.ReadOnly = false;bNumTB.Text = dataGridView1.Rows[a].Cells["bNum"].Value.ToString();bNameTB.Text = dataGridView1.Rows[a].Cells["bbName"].Value.ToString();bPriceTB.Text = dataGridView1.Rows[a].Cells["bPrice"].Value.ToString();bNumTB.ReadOnly = true;bNameTB.ReadOnly = true;bPriceTB.ReadOnly = true;}}
}

6.还书办理窗口

namespace 图书管理系统
{public partial class ReturnBooks : Form{public ReturnBooks(){InitializeComponent();}private void Btn1_Click(object sender, EventArgs e){if (Btn1.Text.Trim() == ""){MessageBox.Show("账号不能为空");}else{ShowBorrowList();}}private void ShowBorrowList(){string sql = "select ID,uId,bName,bNum,bPrice,borrowDate,returnDate,Tag from borrow where uId =@uId";MyDictionary dic = new MyDictionary();dic.Add("@uId", uIdTB.Text.Trim());DataTable dt = SqlHelper.GetList(sql, dic);dataGridView1.DataSource = dt;}private void dataGridView1_CellMouseUp(object sender, DataGridViewCellMouseEventArgs e){// 开关文本框的锁定，将表格内的数据显示到文本框内int a = dataGridView1.CurrentRow.Index;IDDTB.ReadOnly = false;bNameTB.ReadOnly = false;bPriceTB.ReadOnly = false;bNumTB.ReadOnly = false;uuIdTB.ReadOnly = false;TagTB.ReadOnly = false;borrowDateTB.ReadOnly = false;returnDateTB.ReadOnly = false;IDDTB.Text = dataGridView1.Rows[a].Cells["ID"].Value.ToString();bNameTB.Text = dataGridView1.Rows[a].Cells["bName"].Value.ToString();bPriceTB.Text = dataGridView1.Rows[a].Cells["bPrice"].Value.ToString();bNumTB.Text = dataGridView1.Rows[a].Cells["bNum"].Value.ToString();uuIdTB.Text = dataGridView1.Rows[a].Cells["uId"].Value.ToString();TagTB.Text = (dataGridView1.Rows[a].Cells["Tag"].Value.ToString() == "1") ? "是" : "否";borrowDateTB.Text = dataGridView1.Rows[a].Cells["borrowDate"].Value.ToString();returnDateTB.Text = dataGridView1.Rows[a].Cells["returnDate"].Value.ToString();IDDTB.ReadOnly = true;bNameTB.ReadOnly = true;bPriceTB.ReadOnly = true;bNumTB.ReadOnly = true;uuIdTB.ReadOnly = true;TagTB.ReadOnly = true;borrowDateTB.ReadOnly = true;returnDateTB.ReadOnly = true;}#region 处理逾期未还书的用户// 窗口加载时处理借书表内逾期的记录 private void ReturnBooks_Load(object sender, EventArgs e){// 文本框锁定IDDTB.ReadOnly = true;bNameTB.ReadOnly = true;bPriceTB.ReadOnly = true;bNumTB.ReadOnly = true;uuIdTB.ReadOnly = true;TagTB.ReadOnly = true;borrowDateTB.ReadOnly = true;returnDateTB.ReadOnly = true;// Date_Test存储过程// 将逾期未还书的标记 (Tag 置为 1)// 并将其用户冻结 (uBan 置为 1)// create proc Date_Test// as // select uId into #A from borrow where convert(varchar(20),GETDATE(),111)>= returnDate group by uId// update borrow set Tag='1' where convert(varchar(20),GETDATE(),111)>= returnDate// update users set uBan='1' where uId in(select uId from #A)// drop table #Astring sql = "Date_Test";MyDictionary dic = new MyDictionary();SqlHelper.ExecuteNonQuery(sql, CommandType.StoredProcedure, dic);}#endregionprivate void button1_Click(object sender, EventArgs e){string sql="select uBan from users where uId=@uID";MyDictionary dic3 = new MyDictionary();dic3.Add("@uID", uuIdTB.Text.Trim());if (SqlHelper.ExecuteScalar(sql, dic3).ToString() == "1"){MessageBox.Show("因逾期未还书账户被锁定，请及时解锁，并缴纳罚款");return;}else {// 办理借书手续// 删除借书记录 sql = "delete from borrow where ID=@ID";MyDictionary dic4 = new MyDictionary();dic4.Add("@ID", IDDTB.Text.Trim());SqlHelper.ExecuteNonQuery(sql, dic4);// 得到书籍库存量 并+1sql = "select bTag from books where bNum=@bNum";MyDictionary dic5 = new MyDictionary();dic5.Add("@bNum", bNumTB.Text.Trim());int n = Convert.ToInt32(SqlHelper.ExecuteScalar(sql, dic5)) + 1;sql = "update books set bTag=@bTag where bNum=@bNum";MyDictionary dic6 = new MyDictionary();dic6.Add("@bTag", n.ToString());dic6.Add("@bNum", bNumTB.Text.Trim());SqlHelper.ExecuteNonQuery(sql, dic6);MessageBox.Show("还书提交完成");// 刷新借书单ShowBorrowList();}}}
}

7.新书入库和注销书籍窗口

这个窗口用了panel实现了：新书入库、注销书籍两个功能

namespace 图书管理系统
{public partial class 新书入库Form : Form{public 新书入库Form(){InitializeComponent();}private string _p;  // p=="1"时为书籍注销操作public string P{get { return _p; }set { _p = value; }}private void 新书入库Form_Load(object sender, EventArgs e){if (P != "1"){书籍注销panel.Visible = false;}}private void 新书入库Btn_Click(object sender, EventArgs e){if (bNameTB.Text.Trim() == "" || bAuthorTB.Text.Trim() == "" || bPubComTB.Text.Trim() == "" || ISBN.Text.Trim() == "" || bTagTB.Text.Trim() == "" || bPriceTB.Text.Trim() == "" || bPubDatTB.Text.Trim() == ""){MessageBox.Show("请填写完整信息", "失败");}else{// 自动获得图书序列号string sql = " select COUNT(*)+1 from books";string bNum = SqlHelper.ExecuteScalar(sql).ToString();StringBuilder sb = new StringBuilder(bNum);while (sb.Length != 6){sb.Insert(0, "0");}bNum = sb.ToString();// 添加操作sql = "insert into books values(@bNum,@bName,@bAuthor,@bPubCom,@bPubDat,@ISBN,@bPrice,@bTag)";MyDictionary dic = new MyDictionary();dic.Add("@bNum", bNum);dic.Add("@bName", bNameTB.Text.Trim());dic.Add("@bAuthor", bAuthorTB.Text.Trim());dic.Add("@bPubCom", bPubComTB.Text.Trim());dic.Add("@bPubDat", bPubDatTB.Text.Trim());dic.Add("@ISBN", ISBN.Text.Trim());dic.Add("@bPrice", bPriceTB.Text.Trim());dic.Add("@bTag", bTagTB.Text.Trim());int i = SqlHelper.ExecuteNonQuery(sql, dic);if (i == 1){MessageBox.Show("添加成功,图书序列号为" + bNum);}}}private void 注销书籍Btn_Click(object sender, EventArgs e){// 判断账号是否存在if (!SqlHelper.IsBookExistsWithNum(注销书籍TB.Text.Trim())){MessageBox.Show("书籍不存在", "操作失败");return;}else{DialogResult dt = MessageBox.Show("确定要注销此书吗", "提示", MessageBoxButtons.OKCancel);if (dt != DialogResult.OK){return;}else{string sql = "delete from books where bNum=@bNum";MyDictionary dic = new MyDictionary();dic.Add("@bNum", 注销书籍TB.Text.Trim());int i = SqlHelper.ExecuteNonQuery(sql, dic);if (i == 1){MessageBox.Show("注销成功");}}this.Close();}}}
}

8.查询书籍窗口

namespace 图书管理系统
{public partial class FindBookForm : Form{public FindBookForm(){InitializeComponent();}private string _tag;public string Tag1{get { return _tag; }set { _tag = value; }}// pageIndex 标记DGV应该显示第几页private int pageIndex;// pageIndex 标记DGV的总页数int maxIndex;#region 添加书籍private static void INB(){新书入库Form iNB = new 新书入库Form();iNB.ShowDialog();}private void 新书入库ToolStripMenuItem_Click(object sender, EventArgs e){INB();}private void 书籍入库tSBtn_Click(object sender, EventArgs e){INB();}#endregion#region 注销书籍private void 注销书籍ToolStripMenuItem_Click(object sender, EventArgs e){新书入库Form iNB = new 新书入库Form();iNB.P = "1";iNB.Text = "注销书籍";iNB.ShowDialog();}#endregion#region 查看帮助private void 查看帮助ToolStripMenuItem_Click(object sender, EventArgs e){MessageBox.Show("请联系管理员", "帮助");}private void 查看帮助tSBtn_Click(object sender, EventArgs e){MessageBox.Show("请联系管理员", "帮助");}#endregionprivate void FindBookForm_Load(object sender, EventArgs e){if (Tag1 == "user"){注销书籍ToolStripMenuItem.Enabled = false;修改ToolStripMenuItem.Enabled = false;新书入库ToolStripMenuItem.Enabled = false;书籍入库tSBtn.Enabled = false;保存修改tSBtn.Enabled = false;dgv_list.ReadOnly = true;}pageIndex = 1;GetData();}private void GetData(){// 获取页大小int pageSize = 14;// 计算最多有多少页--Math.Ceiling--向上取整// Convert.ToInt32(SqlHelper.ExecuteScalar("select count(*) from books"))得到数据记录总数maxIndex = (int)Math.Ceiling((Convert.ToInt32(SqlHelper.ExecuteScalar("select count(*) from books")) * 1.0 / pageSize));// 获取连接字符串string str = System.Configuration.ConfigurationManager.ConnectionStrings["library"].ConnectionString;// 得到连接using (SqlConnection conn = new SqlConnection(str)){// 判断是否有数据// Convert.ToInt32(SqlHelper.ExecuteScalar("select count(*) from books"))得到数据记录总数if (Convert .ToInt32 (SqlHelper.ExecuteScalar("select count(*) from books")) > 0 && pageIndex > 0){// 确定有数据才进行查询// 创建表格，用来存储数据DataTable dt = new DataTable();// 构造带分页功能的 sql 语句string sql = "select bNum,bName,bAuthor,bPubCom,bPubDat,ISBN,bPrice,bTag from booksWithbookindex where bookindex between @sIndex and @eIndex";// 构造适配器对象SqlDataAdapter adapter = new SqlDataAdapter(sql, conn);// 传递参数// 本页第一条数据adapter.SelectCommand.Parameters.AddWithValue("@sIndex", ((pageIndex - 1) * pageSize + 1));// 本页最后一条数据adapter.SelectCommand.Parameters.AddWithValue("@eIndex", pageIndex * pageSize);// 执行查询conn.Open();adapter.Fill(dt);dgv_list.DataSource = dt;}else if (pageIndex <= 0){pageIndex = 1;}else{MessageBox.Show("没有获取到数据","警告");}}}private void 刷新书库tSBtn_Click(object sender, EventArgs e){if (pageIndex <= 0){pageIndex = 1;}GetData();}private void 刷新ToolStripMenuItem_Click(object sender, EventArgs e){if (pageIndex <= 0){pageIndex = 1;}GetData();}private void 跳转至首页tSBtn_Click(object sender, EventArgs e){pageIndex = 1;GetData();}private void 跳转至上一页tSBtn_Click(object sender, EventArgs e){pageIndex--;if (pageIndex <= 0){pageIndex = 1;}GetData();}private void 跳转至下一页页tSBtn_Click(object sender, EventArgs e){pageIndex++;if (pageIndex > maxIndex ){pageIndex--;MessageBox.Show("哎呀，到底啦 ！","提示");}GetData();}private void 跳转至最后一页tSBtn_Click(object sender, EventArgs e){pageIndex = maxIndex;GetData();}private void 保存修改tSBtn_Click(object sender, EventArgs e){MessageBox.Show("功能暂未开放");/** * // 若绑定数据源则用dgv_list.DataSource as DataTable;// 未绑定则用DgvToTable()强制转换// = DgvToTable(dgv_list);DataTable dt=dgv_list.DataSource as DataTable;// 完成adapter的UpdateCommandstring str = System.Configuration.ConfigurationManager.ConnectionStrings["library"].ConnectionString;using (SqlConnection conn = new SqlConnection(str)){SqlDataAdapter adapter = new SqlDataAdapter();// 构造UpdateCommandstring update = "update books set bName=@bName, bAuthor=@bAuthor,bPubCom=@bPubCom,bPubDat=@bPubDat,ISBN=@ISBN,bPrice=@bPrice,bTag=@bTag where bNum=@bNum";SqlCommand updateCmd = new SqlCommand(update, conn);updateCmd.Parameters.Add("@bName", SqlDbType.NVarChar , 60, "bName");updateCmd.Parameters.Add("@bAuthor", SqlDbType.NVarChar, 60, "bAuthor");updateCmd.Parameters.Add("@bPubCom", SqlDbType.NVarChar, 50, "bPubCom");updateCmd.Parameters.Add("@bPubDat", SqlDbType.NVarChar, 20, "bPubDat");updateCmd.Parameters.Add("@ISBN", SqlDbType.NVarChar, 50, "ISBN");updateCmd.Parameters.Add("@bPrice", SqlDbType.NVarChar, 10, "bPrice");updateCmd.Parameters.Add("@bTag", SqlDbType.NVarChar, 10, "bTag");updateCmd.Parameters.Add("@bNum", SqlDbType.NVarChar, 10, "bNum");adapter.UpdateCommand = updateCmd;// 执行conn.Open();adapter.Update(dt);}// 刷新数据GetData();MessageBox.Show("保存成功");***/}private void 修改ToolStripMenuItem_Click(object sender, EventArgs e){MessageBox.Show("功能暂未开放");}private void 按书名查找tSBtn_Click(object sender, EventArgs e){string sql = "select bNum,bName,bAuthor,bPubCom,bPubDat,ISBN,bPrice,bTag from booksWithbookindex where bName like '%'+ @bName +'%'";MyDictionary dic = new MyDictionary();dic.Add("@bName", 书名tSTB.Text.Trim());DataTable dt = SqlHelper.GetList(sql, dic);dgv_list.DataSource = dt;}}
}

注意事项

请将源代码中的app.config配置文件中的“Data Source”改为当前使用机器的sqlserver账号和实例名称，并更改相应的“User Id=sa;Password=123”

sqlserver文件夹下是sqlserver2005版本下创建的数据库文件

数据库配置可以看app.config配置文件，因为是很早的sql-server版本，所以很可能出现不兼容或者未知的错误。各位自己研究一下，成功了的话可以反馈一下经验

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