《数据库原理》课程设计说明书学生宿舍管理系统学院：计算机与信息科学学院专业：网络工程班级：网络1402姓名学号：吴琳琳**********姓名学号：周岐浪**********指导教师：高金华职称讲师完成时间：2016年12月1、管理系统设计的背景、意义及目标●设计背景●设计意义●设计目标2、系统开发环境3、系统需求分析●基本功能需求●功能模块●数据字典4、概念结构设计●概念设计●E_R模型设计5、逻辑结构设计●将E_R图转换为关系模型●各表关系模型图6、数据实施和维护●功能实现代码●系统实现效果7、个人实现的功能8、总结1、管理系统设计的背景、意义及目标●设计背景随着IT事业的发展，如今，我们已经全面跨入信息时代。
计算机被广泛的应用于各个行业，人工战略已经转化为信息战略，如何在短时间内获取大量信息并整合信息，成为立足于时代的关键。
为了适应考生人数的急剧增长，当今社会各大高校都在进行扩招政策，学生数量的急剧增加带来信息量的成倍增长，由于信息管理的不善与疏忽，各大高校大小事故时有发生。
进行正确的信息管理，对于信息及时处理和反应，能够最大程度的减少学校以及在校学生的损失，减小潜在危机。
学生宿舍是学生生活的基本单位，是同学休息与学习的地方，为了保障同学入住学生宿舍的安全性，信息的处理和管理极为重要。
据了解，本校的宿舍信息管理仍然使用传统的手工方式，主要方式是基于文本、表格等纸介质的手工处理，用人工手抄对男女生信宿信息进行处理登记。
数据信息处理工作量大，容易出错且不易修改；由于数据繁多，容易丢失，逐条查找记录的方式不易操作，浪费了大量的时间，效率极低。
学校的宿舍管理缺乏系统，规范的信息管理手段。
建立学生宿舍管理系统，使宿舍管理工作系统化，规范化，便捷化，程序化，避免宿舍管理的随意性，提高信息处理的速度和准确性，能够及时、准确、有效的查询和修改宿舍情况。
●设计的意义高校规模的扩大,在校学生的基本情况随之层次化、多样化、复杂化，相应的，学生管理工作面临严峻的挑战。
高校学生信息日渐庞大，相应的宿舍管理工作变得复杂而困难。
传统的账本化工作模式，手工记录学生信息并存档，这样的人工管理方式费时、费事、费力，信息获取慢,更新滞后，查阅困难,容易出错。
为了给学生提供一个安全舒适的工作、生活、学习环境，方便宿舍管理工作的同时为学生、教师提供准确实时的信息至关重要。
本校的宿舍信息管理，主要方式是基于文本、表格等纸介质的手工处理，用人工手抄对男女生信宿信息进行处理登记。
数据信息处理工作量大，容易出错且不易修改；由于数据繁多，容易丢失，逐条查找记录的方式不易操作，浪费了大量的时间，效率极低。
以上的管理缺陷对学生宿舍管理造成了相当大的阻力，工作进展困难，问题解决的周期过长，资料整改工作量过大。
为了改善学生宿舍管理情况，运用数据库技术对学生信息进行处理和统一管理，在校园内实现宿舍无纸化办公。
利用计算机的特点，利用互联网进行远程操作，制定学生客户端，教师客户端，管理员客户端，实现有针对性信息化管理，充分发挥计算机的高效性、可靠性、保密性、大容量、低成本等特点，建立学生宿舍管理系统，对宿舍相关信息进行统一管理。
新型管理方式——学生宿舍管理系统，将帮助宿舍管理人员提高工作效率，全面地掌握宿舍情况，提高宿舍安全系数，快速解决学生入住学生宿舍遇到的问题，帮助管理人员与教师及时掌握学生情况。
设计目标开发设计学生宿舍管理系统，运用简单的计算机操作实现快速检索和快速查找，方便信息录入和更新，本系统仅针对管理员进行使用。
实现信息查询、日常管理、宿舍管理、信息维护几个方面的系统化管理：1、信息查询：a）宿舍信息：包括宿舍楼编号、寝室编号、入住人数、寝室入住人员学号、用水量、用电量、水费、电费。
b）学生信息：包括学生姓名、学号、宿舍号c）宿舍基本配置：包括床、柜子、灯、风扇、电视机2、宿舍管理：学生管理（入住、更换宿舍、）；房间管理（增加、删除、查询）3、信息维护：学生个人信息更新、宿舍信息更新、宿舍设备信息更新。
2、系统开发环境开发所使用数据库系统：MySql开发环境：windows 7开发工具：Microsoft VisualStudio 2010开发语言：C++、SQL3、系统需求分析●基本功能需求学生宿舍管理系统为了更好的进行宿舍管理而设计。
用户的需求具体体现在各种信息的输入、修改和查询。
系统功能实现如下：1、提供学生的入住信息的录入，更换宿舍信息登记。
提供各宿舍的具体信息，如宿舍楼栋、宿舍号、水费、电费等。
并可通过查询宿舍号得到宿舍的具体信息、入住的学生信息、宿舍的设备信息等。
2、提供管理员增加、删除各信息的功能。
●功能模块本宿舍管理系统的主要功能为：学生管理、宿舍信息管理、宿舍设备信息管理、信息查询、息更新、信息维护。
●数据字典（1）宿舍设备情况数据字典（2）宿舍信息情况数据字典（3）学生信息情况数据字典4、概念结构设计●概念设计（1）学生实体：用于显示学生的属性，包括姓名、学号、宿舍编号。
（2）宿舍实体：用于显示宿舍的属性，包括楼号、宿舍号、入住学生学号、可住人数、已住人数、用水量、水费、用电量、电费。
（3）宿舍设备实体：用于显示宿舍设备的属性，包括床、柜子、风扇、灯、电视机。
●E_R模型设计（1）学生实体E_R图studentnumname dormitoryCat（2）宿舍实体E_R图roomdormitoryCatdormitoryroomsudentsNum waterwaterChargeelectricityelectricityCharge（3）宿舍物品设备实体E_R图（4）各实体关系E_R图5、逻辑结构设计●将E-R图转换为关系模型：（1）Student：（num、name、dormitoryCat）；（2）Room：（dormitoryCat、dormitory、room、studentNum、water、waterCharge、electricity、electricityCharge）;（3）Item：（dormitoryCat、bed、cabinet、light、fan、tv）●各表关系模型图：（1）I tem表外键设计：（2）S tudent表外键设计：（3）各表之间的关系模型图，Item表与Student表通过外键与Room 联系：6、数据实施和维护功能实现的代码//dbstruct.h#pragma onceclass dbStruct{public:MYSQL my;char errMsg[300];//学生表char StudentNum[9];char StudentName[20];//宿舍char dormitoryCat[6];char dormitory[3];char room[4];double water;double electricity;double waterCharge;double electricityCharge;unsigned int members;//物件bool bed;bool cabinet;bool light;bool fan;bool tv;dbStruct();~dbStruct();bool Init();bool GetStruct();//添加学生表一项bool InsertStudentTable();//改变一项bool SetStudentTable(char num[9]);//主键为num, vachar(8)//获取一项bool GetStudent(char num[9]);//******************删除一项bool DeleteStudent(char num[9]);//添加宿舍表一项bool InsertDormitoryTable();//改变一项bool SetDormitoryTable(char dormitoryCat[6]);//主键为dormitoryCat, varchar(6) //获得一项bool GetDormitory(char dormitoryCat[6]);//删除一项bool DeleteDormitory(char dormitoryCat[6]);//添加物品表一项bool InsertItemTable();//改变一项bool SetItemTable(char dormitoryCat[6]);//主键为dormitoryCat, varchar(6)//获得一项bool GetItem(char dormitoryCat[6]);//******************删除一项bool DeleteItem(char dormitoryCat[6]);void ErrMB();};//dbStruct.cpp#include "stdafx.h"dbStruct::dbStruct(){this->water = 0.0;this->electricity = 0.0;this->waterCharge = 0.0;this->electricityCharge = 0.0;this->members = 4;this->bed = TRUE;this->cabinet = TRUE;this->light = TRUE;this->fan = TRUE;this->tv = TRUE;}dbStruct::~dbStruct(){mysql_close(&my);}bool dbStruct::Init(){mysql_init(&this->my);if(!mysql_real_connect(&this->my, "localhost", "root", "fast", "dormitory", 0, NULL, 0)){StringCchPrintfA(errMsg, 300, "获取寝室物件信息错误: %s\n", mysql_error(&this->my));return false;}mysql_query(&this->my, "SET NAMES gbk");return true;}////////////////////////////////////////////////////////bool dbStruct::InsertStudentTable(){if(this->dormitoryCat == NULL ||this->StudentName == NULL || this->StudentNum == NULL){StringCchPrintfA(errMsg, 100, "添加学生信息错误: 值不完整\n");return FALSE;}char query[300];//获得该寝室已住人数数StringCchPrintfA(query, 300,"SELECT count(dormitoryCat) FROM student WHERE dormitoryCat = \"19425\"",this->dormitoryCat);mysql_query(&this->my, query);//可以确保在数据库工作正常的情况下,能够查询到惟一的一条数据MYSQL_RES * res;res = mysql_use_result(&this->my);MYSQL_ROW row;int i; //i为已住人数while((row = mysql_fetch_row(res)) != NULL){i = row[0][0] - '0';}mysql_free_result(res);if(++i > 4){//超过了寝室最大人员数量StringCchPrintfA(errMsg, 300, "添加学生信息错误: 此寝室已满\n");//**********是否自动添加宿舍信息return FALSE;}//可以添加学生信息StringCchPrintfA(query, 300,"INSERT INTO student(num, name, dormitoryCat) V ALUES(\"%s\", \"%s\", \"%s\")",this->StudentNum, this->StudentName, this->dormitoryCat);if(mysql_query(&this->my, query) != 0){StringCchPrintfA(errMsg, 300, "添加学生信息错误: %s\n", mysql_error(&this->my));//**********是否需要自动添加宿舍信息return FALSE;}return TRUE;}bool dbStruct::DeleteStudent(char num[9]){char query[300];StringCchPrintfA(query, 300,"DELETE FROM student WHERE num = \"%s\"", num);if(mysql_query(&this->my, query) != 0){StringCchPrintfA(errMsg, 300, "删除学生信息错误: %s\n", mysql_error(&this->my));//**********是否需要自动添加宿舍信息return FALSE;}return TRUE;}bool dbStruct::GetStudent(char num[9]){char query[300];StringCchPrintfA(query, 300, "SELECT * FROM student WHERE num = \"%s\"", num);if(mysql_query(&this->my, query) != NULL){StringCchPrintfA(errMsg, 300, "获取学生信息错误: %s\n", mysql_error(&this->my));return FALSE;}MYSQL_RES * res;MYSQL_ROW row;res = mysql_use_result(&this->my);while((row = mysql_fetch_row(res)) != NULL){StringCchPrintfA(this->StudentNum, 9, row[0]);StringCchPrintfA(this->StudentName, 20, row[1]);StringCchPrintfA(this->dormitoryCat, 6, row[2]);}mysql_free_result(res);return TRUE;}////////////////////////////////////////////////////////bool dbStruct::InsertDormitoryTable(){if(this->dormitoryCat == NULL || this->room == NULL || this->dormitory == NULL) {StringCchPrintfA(errMsg, 300, "添加宿舍信息错误: 值不完整\n");return FALSE;}char query[300];StringCchPrintfA(query, 300,"INSERT INTO room(dormitoryCat, dormitory, room, \studentsNum, water, electricity, waterCharge, \electricityCharge) V ALUES(\"%s\", \"%s\", \"%s\", %d, %.2lf, %.2lf, %.2lf, %.2lf)",this->dormitoryCat, this->dormitory, this->room,this->members, this->water, this->electricity,this->waterCharge, this->electricityCharge);if(mysql_query(&this->my, query) != 0){StringCchPrintfA(errMsg, 300, "添加宿舍信息错误: %s\n", mysql_error(&this->my));return FALSE;}this->InsertItemTable();return TRUE;}bool dbStruct::DeleteDormitory(char dormitoryCat[6]){//由于外键约束,删除此寝室时,相应的student和item表中的此寝室信息自动删除.char query[300];StringCchPrintfA(query, 300, "DELETE FROM room WHERE dormitoryCat = \"%s\"", dormitoryCat);if(mysql_query(&this->my, query) != 0){StringCchPrintfA(errMsg, 300, "删除宿舍信息错误: %s\n", mysql_error(&this->my));return FALSE;}return TRUE;}bool dbStruct::GetDormitory(char dormitoryCat[6]){char query[300];StringCchPrintfA(query, 300, "SELECT * FROM room WHERE dormitoryCat = \"%s\"", dormitoryCat);if(mysql_query(&this->my, query) != NULL){StringCchPrintfA(errMsg, 300, "获取寝室信息错误: %s\n", mysql_error(&this->my));return FALSE;}MYSQL_RES * res;MYSQL_ROW row;res = mysql_use_result(&this->my);while((row = mysql_fetch_row(res)) != NULL){StringCchPrintfA(this->dormitoryCat, 6, row[0]);StringCchPrintfA(this->dormitory, 3, row[1]);StringCchPrintfA(this->room, 4, row[2]);this->members = atoi(row[3]);this->water = atof(row[4]);this->electricity = atof(row[5]);this->waterCharge = atof(row[6]);this->electricityCharge = atof(row[7]);}mysql_free_result(res);return TRUE;}////////////////////////////////////////////////////////bool dbStruct::InsertItemTable(){if(this->dormitoryCat == NULL){StringCchPrintfA(errMsg, 300, "添加宿舍信息错误: 值不完整\n");return FALSE;}char query[300];StringCchPrintfA(query, 300,"INSERT INTO item(dormitoryCat,bed, cabinet, light, fan, tv) V ALUES(\"%s\", %d, %d, %d, %d, %d)",this->dormitoryCat, this->bed, this->cabinet, this->light,this->fan, this->tv);if(mysql_query(&this->my, query) != 0){StringCchPrintfA(errMsg, 300, "添加宿舍物件信息错误: %s\n", mysql_error(&this->my));return FALSE;}return TRUE;}bool dbStruct::GetItem(char dormitoryCat[6]){char query[300];StringCchPrintfA(query, 300, "SELECT * FROM item WHERE dormitoryCat = \"%s\"", dormitoryCat);if(mysql_query(&this->my, query) != NULL){StringCchPrintfA(errMsg, 300, "获取寝室物件信息错误: %s\n", mysql_error(&this->my));return FALSE;}MYSQL_RES * res;MYSQL_ROW row;res = mysql_use_result(&this->my);while((row = mysql_fetch_row(res)) != NULL){StringCchPrintfA(this->dormitoryCat, 6, row[0]);this->bed = (atoi(row[3]) == 1? true: false);this->cabinet = (atof(row[4]) == 1? true: false);this->light = (atof(row[5]) == 1? true: false);this->fan = (atof(row[6]) == 1? true: false);this->tv = (atof(row[7]) == 1? true: false);}mysql_free_result(res);return TRUE;}void dbStruct::ErrMB(){MessageBoxA(GetActiveWindow(), this->errMsg, "发生错误!", MB_ICONERROR); }//stdafx.h#pragma once#include "targetver.h"// Windows 头文件:#include <windows.h>#include <mysql.h>#include <WindowsX.h>#include <CommCtrl.h>// C 运行时头文件#include <stdlib.h>#include <malloc.h>#include <memory.h>#include <tchar.h>#include <strsafe.h>// TODO: 在此处引用程序需要的其他头文件#include "dbStruct.h"#pragma comment(lib, "libmysql.lib")#pragma comment(lib, "comctl32.lib")//stdafx.cpp// stdafx.cpp : 只包括标准包含文件的源文件// DormitoryMng.pch 将作为预编译头// stdafx.obj 将包含预编译类型信息#include "stdafx.h"//dormitoryMng.h#pragma once#include "resource.h"#define MAX_LOADSTRING 100//dormitoryMng.cpp(部分代码)bool QueryStart(bool flag){char query[300];if(flag == true)//查询寝室信息{GetWindowTextA(GetDlgItem(g_hWndQuery, IDC_EDITBUILD), m_db.dormitory, 3);GetWindowTextA(GetDlgItem(g_hWndQuery, IDC_EDITROOM), m_db.room, 4);if(strcmp(m_db.dormitory, "") == 0 && strcmp(m_db.room,"") == 0){StringCchCopyA(query, 300,"SELECT room.dormitoryCat,dormitory, room, studentsNum, \count(student.dormitoryCat), water, electricity, waterCharge, \electricityCharge FROM room LEFT JOIN student ON room.dormitoryCat = \student.dormitoryCat GROUP BY room.dormitoryCat");}else if(strcmp(m_db.dormitory, "") != 0 && strcmp(m_db.room,"") == 0){StringCchPrintfA(query, 300,"SELECT room.dormitoryCat,dormitory, room, studentsNum, \count(student.dormitoryCat), water, electricity, waterCharge, \electricityCharge FROM room LEFT JOIN student ON room.dormitoryCat = \student.dormitoryCat WHERE dormitory = \"%s\" GROUP BY room.dormitoryCat",m_db.dormitory);}else if(strcmp(m_db.dormitory, "") == 0 && strcmp(m_db.room,"") != 0){StringCchPrintfA(query, 300,"SELECT room.dormitoryCat,dormitory, room, studentsNum, \count(student.dormitoryCat), water, electricity, waterCharge, \electricityCharge FROM room LEFT JOIN student ON room.dormitoryCat = \student.dormitoryCat WHERE room = \"%s\" GROUP BY room.dormitoryCat",m_db.room);}else{StringCchPrintfA(query, 300,"SELECT room.dormitoryCat,dormitory, room, studentsNum, \count(student.dormitoryCat), water, electricity, waterCharge, \electricityCharge FROM room LEFT JOIN student ON room.dormitoryCat = \student.dormitoryCat WHERE dormitory = \"%s\" AND room = \"%s\" GROUP BY room.dormitoryCat",m_db.dormitory, m_db.room);}if(true != QueryInput(L"寝室号.楼栋号.寝室号.可住人数.当前人数.用水量.用电量.水费.电费", 9, query)){m_db.ErrMB();}}else//查询学生信息{GetWindowTextA(GetDlgItem(g_hWndQuery, IDC_EDITSTUNO), m_db.StudentNum, 9);GetWindowTextA(GetDlgItem(g_hWndQuery, IDC_EDITSTUNAME), m_db.StudentName, 20);if(strcmp(m_db.StudentNum, "") == 0 && strcmp(m_db.StudentName, "") == 0){StringCchCopyA(query, 300,"SELECT num, name, dormitoryCat FROM student");}else if(strcmp(m_db.StudentNum, "") != 0 && strcmp(m_db.StudentName, "") == 0){StringCchPrintfA(query, 300,"SELECT num, name, dormitoryCat FROM student WHERE num = \"%s\"",m_db.StudentNum);}else if(strcmp(m_db.StudentNum, "") == 0 && strcmp(m_db.StudentName, "") != 0){StringCchPrintfA(query, 300,"SELECT num, name, dormitoryCat FROM student WHERE name = \"%s\"",m_db.StudentName);}else{StringCchPrintfA(query, 300,"SELECT num, name, dormitoryCat FROM student WHERE name = \"%s\" AND num = \"%s\"",m_db.StudentName, m_db.StudentNum);}if(true != QueryInput(L"学号.姓名.所住寝室", 3, query)){m_db.ErrMB();}}return TRUE;}LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam){int wmId, wmEvent;PAINTSTRUCT ps;HDC hdc;switch (message){case WM_CREATE:{if(!m_db.Init()){m_db.ErrMB();//*********填写错误信息break;}//创建列表CreateList(hWnd);//查询填充if(false == QueryInput(L"寝室号.楼栋号.寝室号.可住人数.当前人数.用水量.用电量.水费.电费", 9,"SELECT room.dormitoryCat,dormitory, room, studentsNum,\count(student.dormitoryCat),water,electricity, waterCharge,\electricityCharge FROM room LEFT JOIN student ON room.dormitoryCat \= student.dormitoryCat GROUP BY room.dormitoryCat")){m_db.ErrMB();}}break;case WM_NOTIFY:{LPNMITEMACTIV ATE nc = (LPNMITEMACTIV ATE)lParam;if(nc->hdr.code == NM_RCLICK && nc->iSubItem != 0){HMENU hMenu = CreatePopupMenu();InsertMenu(hMenu, 0, MF_ENABLED, 10023, _T("删除"));InsertMenu(hMenu, 0, MF_ENABLED, 10024, _T("详细信息"));ClientToScreen(hWnd, &nc->ptAction);int result = TrackPopupMenu(hMenu,TPM_RETURNCMD | TPM_LEFTBUTTON| TPM_NOANIMATION,nc->ptAction.x + 5, nc->ptAction.y + 30, 0, hWnd, NULL);if(result == 10023){wchar_t str[9];ListView_GetItemText(g_hWndList, nc->iItem, 2, str, 9);int iSize;char * szMultiByte;//宽字符转换成多字节型iSize = WideCharToMultiByte(CP_ACP, 0, str, -1, NULL, 0, NULL, NULL);szMultiByte = new char[iSize];WideCharToMultiByte(CP_ACP, 0, str, -1, szMultiByte, iSize, NULL, NULL);if(iSize == 6){if(!m_db.DeleteDormitory(szMultiByte)){m_db.ErrMB();delete szMultiByte;break;}//刷新ListView_DeleteAllItems(g_hWndList);while(ListView_DeleteColumn(g_hWndList, 1)){}if(true != QueryInput(L"寝室号.楼栋号.寝室号.可住人数.当前人数.用水量.用电量.水费.电费", 9,"SELECT room.dormitoryCat,dormitory, room, studentsNum,\count(student.dormitoryCat),water,electricity, waterCharge,\electricityCharge FROM room LEFT JOIN student ON room.dormitoryCat \= student.dormitoryCat GROUP BY room.dormitoryCat")){m_db.ErrMB();}}else{if(!m_db.DeleteStudent(szMultiByte)){m_db.ErrMB();delete szMultiByte;break;}//刷新ListView_DeleteAllItems(g_hWndList);while(ListView_DeleteColumn(g_hWndList, 1)){}if(true != QueryInput(L"学号.姓名.所住寝室", 3, "SELECT * FROM student")){m_db.ErrMB();}}delete szMultiByte;RedrawWindow(g_hWnd, NULL, NULL, RDW_INV ALIDATE);}}break;}case WM_COMMAND:{wmId = LOWORD(wParam);wmEvent = HIWORD(wParam);// 分析菜单选择:switch (wmId){case IDC_REFRESH://刷新ListView_DeleteAllItems(g_hWndList);while(ListView_DeleteColumn(g_hWndList, 1)){}if(true != QueryInput(L"寝室号.楼栋号.寝室号.可住人数.当前人数.用水量.用电量.水费.电费", 9,"SELECT room.dormitoryCat,dormitory, room, studentsNum,\count(student.dormitoryCat),water,electricity, waterCharge,\electricityCharge FROM room LEFT JOIN student ON room.dormitoryCat \= student.dormitoryCat GROUP BY room.dormitoryCat")){m_db.ErrMB();}RedrawWindow(g_hWnd, NULL, NULL, RDW_INV ALIDATE);break;case IDC_DELETE:{int itemCount;itemCount = ListView_GetItemCount(g_hWndList);for(int i = 0; i < itemCount; i++){if(ListView_GetCheckState(g_hWndList, i)){wchar_t str[9];ListView_GetItemText(g_hWndList, i, 2, str, 9);int iSize;char * szMultiByte;//宽字符转换成多字节型iSize = WideCharToMultiByte(CP_ACP, 0, str, -1, NULL, 0, NULL, NULL);szMultiByte = new char[iSize];WideCharToMultiByte(CP_ACP, 0, str, -1, szMultiByte,iSize, NULL, NULL);if(iSize == 6){if(!m_db.DeleteDormitory(szMultiByte)){m_db.ErrMB();delete szMultiByte;break;}//刷新ListView_DeleteAllItems(g_hWndList);while(ListView_DeleteColumn(g_hWndList, 1)){}if(true != QueryInput(L"寝室号.楼栋号.寝室号.可住人数.当前人数.用水量.用电量.水费.电费", 9,"SELECT room.dormitoryCat,dormitory, room, studentsNum,\count(student.dormitoryCat),water,electricity, waterCharge,\electricityCharge FROM room LEFT JOIN student ON room.dormitoryCat \= student.dormitoryCat GROUP BY room.dormitoryCat")){m_db.ErrMB();}}else{if(!m_db.DeleteStudent(szMultiByte)){m_db.ErrMB();delete szMultiByte;break;}//刷新ListView_DeleteAllItems(g_hWndList);while(ListView_DeleteColumn(g_hWndList, 1)){}if(true != QueryInput(L"学号.姓名.所住寝室", 3, "SELECT * FROM student")){m_db.ErrMB();}}delete szMultiByte;break;}}break;}case IDC_DELETESOME:{int itemCount;int iSize;int i = 0;while(i < (itemCount = ListView_GetItemCount(g_hWndList))){if(ListView_GetCheckState(g_hWndList, i)){wchar_t str[9];ListView_GetItemText(g_hWndList, i, 2, str, 9);char * szMultiByte;//宽字符转换成多字节型iSize = WideCharToMultiByte(CP_ACP, 0, str, -1, NULL, 0, NULL, NULL);szMultiByte = new char[iSize];WideCharToMultiByte(CP_ACP, 0, str, -1, szMultiByte, iSize, NULL, NULL);if(iSize == 6){if(!m_db.DeleteDormitory(szMultiByte)){m_db.ErrMB();delete szMultiByte;return 0;}}else{if(!m_db.DeleteStudent(szMultiByte)){m_db.ErrMB();delete szMultiByte;return 0;}}delete szMultiByte;break;}elsei++;}if(iSize == 6){//刷新ListView_DeleteAllItems(g_hWndList);while(ListView_DeleteColumn(g_hWndList, 1)){}if(true != QueryInput(L"寝室号.楼栋号.寝室号.可住人数.当前人数.用水量.用电量.水费.电费", 9,"SELECT room.dormitoryCat,dormitory, room, studentsNum,\count(student.dormitoryCat),water,electricity, waterCharge,\electricityCharge FROM room LEFT JOIN student ON room.dormitoryCat \= student.dormitoryCat GROUP BY room.dormitoryCat")){m_db.ErrMB();}}else{//刷新ListView_DeleteAllItems(g_hWndList);while(ListView_DeleteColumn(g_hWndList, 1)){}if(true != QueryInput(L"学号.姓名.所住寝室", 3, "SELECT * FROM student")){m_db.ErrMB();}}break;}case IDM_ABOUT:DialogBox(g_hInst, MAKEINTRESOURCE(IDD_ABOUTBOX), hWnd, About);break;case IDM_EXIT:DestroyWindow(g_hWndQuery);DestroyWindow(g_hWndAddStu);DestroyWindow(g_hWndAddRoom);DestroyWindow(hWnd);break;case IDM_QUERY:{if(firstQuery){g_hWndQuery = CreateDialog(g_hInst, MAKEINTRESOURCE(IDD_DLGQUERY), hWnd, Query);firstQuery = false;}elseShowWindow(g_hWndQuery, SW_NORMAL);break;}case IDM_ADDSTU:{if(firstAddStu){g_hWndAddStu = CreateDialog(g_hInst, MAKEINTRESOURCE(IDD_STU), hWnd, AddStu);firstAddStu = false;}elseShowWindow(g_hWndAddStu, SW_NORMAL);break;}case IDM_ADDROOM:{if(firstAddRoom){g_hWndAddRoom = CreateDialog(g_hInst, MAKEINTRESOURCE(IDD_ROOM), hWnd, AddRoom);firstAddRoom = false;}elseShowWindow(g_hWndAddRoom, SW_NORMAL);break;}default:return DefWindowProc(hWnd, message, wParam, lParam);}break;}case WM_PAINT:{hdc = BeginPaint(hWnd, &ps);// TODO: 在此添加任意绘图代码...HFONT guiFont = (HFONT)GetStockObject(DEFAULT_GUI_FONT);SelectObject(hdc, guiFont);SetBkMode(hdc, TRANSPARENT);SendDlgItemMessage(hWnd, IDC_DELETE, WM_SETFONT,(WPARAM)guiFont, TRUE);SendDlgItemMessage(hWnd, IDC_DELETESOME, WM_SETFONT, (WPARAM)guiFont, TRUE);SendDlgItemMessage(hWnd, IDC_REFRESH, WM_SETFONT,(WPARAM)guiFont, TRUE);char m[6],n[6];mysql_query(&m_db.my, "SELECT count(dormitoryCat) FROM room");MYSQL_RES * res;MYSQL_ROW row;res = mysql_use_result(&m_db.my);while((row = mysql_fetch_row(res)) != NULL){StringCchPrintfA(m, 6, "%s", row[0]);}mysql_free_result(res);mysql_query(&m_db.my, "SELECT count(num) FROM student");res = mysql_use_result(&m_db.my);while((row = mysql_fetch_row(res)) != NULL){StringCchPrintfA(n, 6, "%s", row[0]);}mysql_free_result(res);char str[100];StringCchPrintfA(str, 100,"宿舍信息如下:当前共有%s 间寝室, 共有%s 名学生", m, n);RECT rect;rect.left = 10;rect.top = 8;rect.right = 510;rect.bottom = 35;DrawTextA(hdc ,str, strlen(str), &rect, DT_TOP | DT_LEFT);SetWindowText(g_hWndDelete, _T("删除"));SetWindowText(g_hWndDeleteSome, _T("删除选中"));SetWindowText(g_hWndRefresh, _T("刷新"));EndPaint(hWnd, &ps);break;}case WM_SIZE:{RECT rectList;int cxClient = LOWORD(lParam);int cyClient = HIWORD(lParam);if(cxClient <= 420 || cyClient <= 300)return TRUE;GetClientRect(g_hWndList, &rectList);SetWindowPos(g_hWndList, NULL,0, 0,cxClient, cyClient - rectList.top - 80,SWP_NOMOVE);SetWindowPos(g_hWndDelete, NULL,10, cyClient - 35, 0, 0, SWP_NOSIZE);SetWindowPos(g_hWndDeleteSome, NULL,95, cyClient - 35, 0, 0, SWP_NOSIZE);SetWindowPos(g_hWndRefresh, NULL,cxClient - 100, cyClient - 35, 0, 0, SWP_NOSIZE);break;}case WM_CLOSE:DestroyWindow(g_hWndQuery);DestroyWindow(g_hWndAddStu);DestroyWindow(g_hWndAddRoom);DestroyWindow(hWnd);break;case WM_DESTROY:PostQuitMessage(0);break;default:return DefWindowProc(hWnd, message, wParam, lParam);}return 0;}系统实现效果7、总结通过这个系统的设计，我了解了做一个数据库开发的简要过程。
