用C#实现一个简单的图书管理系统（课程设计）

用C#(sharp)实现一个简单的图书管理系统（课程设计）

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StoredProcedure
cmd.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.登陆界面

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MainForm
mainForm.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");
}
#endregion

private 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（图片略）

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panel
private 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();

}
#endregion

private 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（图片略）

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-1
sql = "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 #A
string sql = "Date_Test";
MyDictionary dic = new MyDictionary();
SqlHelper.ExecuteNonQuery(sql, CommandType.StoredProcedure, dic);
}
#endregion

private 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+1
sql = "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

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");
}

#endregion

private 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UpdateCommand
string str = System.Configuration.ConfigurationManager.ConnectionStrings["library"].ConnectionString;
using (SqlConnection conn = new SqlConnection(str))
{

SqlDataAdapter adapter = new SqlDataAdapter();

// 构造UpdateCommand
string 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;
}
}
}