数据库课程电话计费管理系统

数据库课程设计报告设计题目：电话计费管理系统目录1.课程设计目的.....................................................................................2.系统需求分析阶段.............................................................................2.1数据流图.......................................................................................2.2数据字典.......................................................................................3.功能需求分析 (5)4.概念结构设计阶段 (6)4.1 全局ER (6)5.逻辑结构设计阶段： (6)5.1关系模式 (6)6.物理结构设计阶段 (7)7.数据库实施阶段 (8)7.1界面设计 (8)7.2部分代码模块 (10)8.实验总结：.........................................................................................1.课程设计目的熟悉数据库设计的各个阶段，会使用visio工具实现阶段性设计的表达，并使用语言实现数据库的连接，完成数据的显示、修改、插入和删除。

学生根据所学的数据库原理与程序设计知识，能够针对一个小型的数据库管理系统进行需求分析、系统设计、数据库设计、编码，测试等，完成要求的功能，从而达到掌握开发一个小型数据库的目的。

2.系统需求分析阶段2.1数据流图2.1.1电话计费管理系统的数据流图电话计费库管理系统功能：?1)?月花费查询：客户可对每月的话费进行查询（每项记录包括通话费、新业务费、费用合计、实缴费用合计等信息）。

2)?帐户余额查询：客户可查询话费单上的余额。

3)?用户资料查询：客户可以查阅个人资料。

4)?业务查询：客户可以实时了解个部门的各项活动。

5)?查询读者：可根据条件进行高级查询，并允许模糊查询。

5)缴费信息：管理员可根据用户所缴的话费进行计费，并反馈给用户，用户在交费的同时可打印发票。

7)?插入读者：添加新读者，需要填入足够的信息，并判断信息是否有效。

?6)?月话费管理：管理员可对每月的话费记录进行逐条添加、更新和删除。

7)?客户受理结果：管理员可对每月的话费记录进行逐条添加、更新和删除。

?4.概念结构设计阶段4.1 ER5.逻辑结构设计阶段：5.1关系模式E-R图向关系模型的转换实体及其属性客户：｛客户姓名，联系电话，联系地址，套餐名称｝应收款额：｛账户编号，手机号码，应收费用，余额｝话费信息库：｛手机号码，客户姓名，通话费，新业务费，费用合计，套餐名称｝收费员：｛收费员编号，姓名，年龄｝客户受理：｛手机号码，客户姓名，受理内容，受理时间｝通话信息： {手机号码，来电号码，去电号码，单位费用，通话时长，总费用 } 联系的属性使用：｛手机密码｝计费：｛密码｝根据转换规则将实体转换为关系模式本实例中没有 1：1 关系对于 1：n 联系，将它们与 n 端的关系模式合并。

该关系模式中应加入 1 端的码和联系本身的属性。

客户：｛客户姓名，所在城市，套餐名称，手机号码，手机密码｝收费员：｛收费员编号，姓名，年龄，手机号码，密码｝对于 m ：n 的联系，必须单独转换为一个关系模式，属性由各实体的码和联系本身的属性组成，关系的码为组成联系各实体的码的组合。

支付：｛客户姓名，联系电话，收费员编号｝处理：｛手机号码，收费员编号｝电话计费系统的 E-R 图，转换为以下关系模式：客户：｛手机号码，所在城市，套餐名称，客户姓名，手机密码｝收费员：｛收费员编号，姓名，年龄，手机号码，密码｝话费信息：｛手机号码，客户姓名，通话费，费用合计，套餐名称｝客户受理：｛手机号码，收费员编号，客户姓名，受理内容，受理时间｝通话信息： {手机号码，来电号码，去电号码，单位费用，通话时长，总费用 }6.物理结构设计阶段客户受理表客户资料表收款表通话信息表收费员表消费表7.数据库实施阶段7.1界面设计1）登录界面2）boss界面3）主界面4）客户受理子界面（有添加客户信息、修改客户信息、删除客户信息、查询客户信息功能）：7.2部分代码模块登录模块Public Class RegisterLoginManagerClassDim Flag As BooleanFunction SelectUIand(ByVal User As UserInfoClass) As BooleanDim DalUser As New UserDAODim Userdbs As New UserInfoClassDim flag As Boolean = Userdbs.Password = User.Passwordflag = DalUser.selectUserInfo(Userdbs)Return flagEnd FunctionFunction SelectRegister(ByVal User As UserInfoClass) As BooleanDim DalUser As New UserDAODim Userdbs As New UserInfoClass = Userdbs.Password = User.PasswordUserdbs = DalUser.InsertUserInfo(Userdbs)'判断操作If = vbNull ThenReturn FalseElseReturn TrueEnd IfEnd FunctionEnd ClassImportsPublic Class UserDAO'连接数据库Dim sqlCnStr As String = "server=.;uid=sa;pwd=sql;database=TelManage_data"Dim sqlCn As SqlConnection = New SqlConnection(sqlCnStr)'自定义检查参数Function selectUserInfo(ByVal User As UserInfoClass) As BooleanDim sql As String = "select * from Userinfor where user_name='" & & "'and user_pwd='" & User.Password & "'"'sql语句Dim cmd As SqlCommand = New SqlCommand(sql, sqlCn) '定义sqlCommand对象'Dim read As SqlDataReader '定义sqlDataReader对象Dim read As IDataReaderDim UserDataTable As New DataTable'定义一个DataTable对象Dim User1 As New UserInfoClasssqlCn.Open()read = cmd.ExecuteReader()Dim flag As Booleanflag = read.Read()UserDataTable.Load(read)' Return User1If Not IsNothing(sqlCn) ThensqlCn.Close()End IfReturn flagEnd FunctionFunction InsertUserInfo(ByVal Userdbs As UserInfoClass) As UserInfoClassThrow New NotImplementedExceptionEnd FunctionEnd ClassPublic Class UserInfoClassPrivate UserName As StringPublic Property Name As StringGetReturn UserNameEnd GetSet(ByVal value As String)UserName = valueEnd SetEnd PropertyPrivate UserPwd As StringPublic Property Password As StringGetReturn UserPwdEnd GetSet(ByVal value As String)UserPwd = valueEnd SetEnd PropertyEnd Class执行增删改查函数模块（部分）：ImportsPublic Class kehuchaxunForm1Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim did As String = Me.TextBox1.TextDim connectionString As String = "Server=.;uid=sa;pwd=sql;database=TelManage_data"Dim commandText As String = "SELECT * FROM kehushouli "Using connection As New SqlConnection(connectionString)Dim Command As SqlCommand = New SqlCommand(commandText, connection)connection.Open()Dim reader As SqlDataReader = Command.ExecuteReader()While (reader.Read() = True)Me.TextBox1.Text &= reader(0) & " " & reader(1) & " " & reader(2) & vbCrLf End Whileconnection.Close()End UsingEnd SubPrivate Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click Me.Close()End SubPrivate Sub TextBox1_TextChanged(sender As Object, e As EventArgs) Handles TextBox1.TextChangedEnd SubEnd ClassImports //删除Public Class kehushanchuPrivate Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim did As String = Me.TextBox1.TextDim connectionString As String = "Server=.;uid=sa;pwd=sql;database=TelManage_data"Dim commandTextDelete As String = "DELETE FROM kehushouli WHERE kehuxingming=@id"Using connection As New SqlConnection(connectionString)connection.Open()Dim cmdDelete As SqlCommand = New SqlCommand(commandTextDelete, connection)"@id", TextBox1.Text)TryDim result As Integer = cmdDelete.ExecuteNonQuery()If result = 1 ThenMsgBox("成功")ElseMsgBox("删除记录失败")End IfCatch ex As ExceptionMsgBox(ex.ToString())End Tryconnection.Close()End UsingEnd SubPrivate Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click Me.Close()End SubEnd ClassImports //插入Public Class kehutianjiaForm1Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim connectionString As String = "Server=.;uid=sa;pwd=sql;database=TelManage_data"Dim commandTextInsert As String = "INSERT INTO kehushouli(kehuxingming,shoujihaoma,shoulineirong) VALUES(@a,@b,@c)"Using connection As New SqlConnection(connectionString)connection.Open()Dim cmdInsert As SqlCommand = New SqlCommand(commandTextInsert, connection)"@a", TextBox1.Text)"@b", TextBox2.Text)"@c", TextBox3.Text)TryDim result As Integer = cmdInsert.ExecuteNonQuery()If result = 1 ThenMsgBox("插入成功")End IfCatch ex As ExceptionMsgBox(ex.ToString())End Tryconnection.Close()End UsingEnd SubPrivate Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click Me.Close()End SubEnd ClassImports //修改Public Class kehuxiugaiPrivate Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim connectionString As String = "Server=.;uid=sa;pwd=sql;database=TelManage_data"Dim commandTextUpdate As String = "Update kehushouli Set shoujihaoma=@bbb,shoulineirong=@ccc where kehuxingming=@aaa"Using connection As New SqlConnection(connectionString)connection.Open()Dim cmdUpdate As SqlCommand = New SqlCommand(commandTextUpdate, connection)"@aaa", TextBox1.Text)"@bbb", TextBox2.Text)"@ccc", TextBox3.Text)TryDim result As Integer = cmdUpdate.ExecuteNonQuery()If result = 1 ThenMsgBox("修改成功")ElseMsgBox("修改失败")End IfCatch ex As ExceptionMsgBox(ex.ToString())End Tryconnection.Close()End UsingEnd SubPrivate Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click Me.Close()End SubPrivate Sub kehuxiugai_Load(sender As Object, e As EventArgs) Handles MyBase.LoadEnd SubEnd Class8.实验总结：过这次课程设计，从设计需求分析，到各模块功能的设计及数据库设计，我对电话计费管理系统有了较深入的了解，基本掌握了数据库设计的思想。