Разработка программного обеспечения для оценки уровня знаний студентов с применением технологии "Клиент-сервер"

function GetTrueAnswerForBuilet (QuestionPath: string): integer;

function SetTrueAnswerForBuilet (QuestionPath: string; TrueAnswer: Integer): boolean;

end;

implementation

{TQuestDB}

constructor TQuestDB. Create (ParentHwnd:HWND);

var ExeName:PChar;

AppName: String;

ExeNameLen:byte;

 /////

NewSearch_:TSearchRec;

i, ii:byte;

QuestionPathName:string;

QCount:integer;

FOptions:TIniFile;

begin

SelfParent:=ParentHwnd;

GetMem (ExeName, 255);

ExeNameLen:=255;

GetModuleFileName (0, ExeName, ExeNameLen); // определяем имя исполняемого модуля

AppName:=StrPas(ExeName);

ProgRootDir:=ExtractFileDir(AppName);

WorksCount_:=0;

NewBase. Works:=HLringList. Create; // заполняем список работ

FindFirst (ProgRootDir+'\Questions\*', faDirectory, NewSearch_);

repeat

if NewSearch_.Name[1]<>'.' then

begin

NewBase. Works. Add (NewSearch_.Name);

inc (WorksCount_);

end;

until FindNext (NewSearch_)<>0;

FindClose (NewSearch_);

 // Заполняем списки преподов

SetLength (NewBase. Teachers, WorksCount_);

for i:=0 to WorksCount_-1 do

begin

NewBase. Teachers[i]:=HLringList. Create;

FindFirst (ProgRootDir+'\Questions\'+NewBase. Works. Strings[i]+'\*', faDirectory, NewSearch_);

repeat

if NewSearch_.Name[1]<>'.' then NewBase. Teachers[i].Add (NewSearch_.Name);

until FindNext (NewSearch_)<>0;

FindClose (NewSearch_);

end;

for i:=0 to NewBase. Works. Count-1 do

begin

for ii:=0 to NewBase. Teachers[i].Count-1 do

begin

QuestionPathName:=ProgRootDir+'\Questions\'+NewBase. Works. Strings[i]+'\'+ NewBase. Teachers[i].Strings[ii];

if FileExists (QuestionPathName+'\WorkSet.ini') then

begin

FOptions:=TIniFile. Create (QuestionPathName+'\WorkSet.ini');

QCount:=0;

FindFirst (QuestionPathName+'\*', faDirectory, NewSearch_);

repeat

if NewSearch_.Name[1]<>'.' then

if TestByDigit (NewSearch_.Name) then inc(QCount);

until FindNext (NewSearch_)<>0;

FindClose (NewSearch_);

FOptions. WriteInteger ('QuestionCount', 'value', QCount);

FOptions. Free;

if QCount>0 then QuestCount:=QCount else ERROR_MESSAGE_FOR_DEBUG_LEVEL(ErrQuestionsNotFound);

end else ERROR_MESSAGE_FOR_DEBUG_LEVEL(ErrConfigIniFileWorkSetNotFound);

end;

end;

end;

destructor TQuestDB. Destroy;

var i:integer;

begin

for i:=0 to NewBase. Works. Count-1 do

begin

NewBase. Teachers[i].Destroy;

end;

SetLength (NewBase. Teachers, 0);

NewBase. Works. Destroy;

inherited;

end;

function TQuestDB. SetActiveWork (Num:byte):boolean;

begin

result:=false;

if Num<NewBase. Works. Count then

begin

ActiveWork:=NewBase. Works. Strings[Num];

ActiveWorkNum:=Num;

result:=true;

end else ERROR_MESSAGE_FOR_DEBUG_LEVEL(ErrImputWorkNumberFault);

end;

function TQuestDB. SetActiveTeacher (Num:byte):boolean;

begin

result:=false;

if Num<NewBase. Teachers[ActiveWorkNum].Count then

begin

ActiveTeacher:=NewBase. Teachers[ActiveWorkNum].Strings[Num];

ActiveTeacherNum:=Num;

if UpdateQuestionsSet then result:=true;

end else ERROR_MESSAGE_FOR_DEBUG_LEVEL(ErrImputTeacherNumberFault);

end;

function TQuestDB. GetTeachersStringList: string;

var i:integer;

begin

Result:='';

for i:=0 to NewBase. Teachers[ActiveWorkNum].Count-1 do Result:=Result+NewBase. Teachers[ActiveWorkNum].Strings[i]+'|';

Result:=Result+'>';

end;

function TQuestDB. GetWorksStringList: string;

var i:integer;

begin

Result:='';

for i:=0 to NewBase. Works. Count-1 do Result:=Result+NewBase. Works. Strings[i]+'|';

Result:=Result+'>';

end;

function TQuestDB. GetWorkByIndex (i:byte): string;

begin

if i<=NewBase. Works. Count-1 then Result:=NewBase. Works. Strings[i] else Result:='';

end;

function TQuestDB. GetTeacherByIndex (i:byte): string;

begin

if i<=NewBase. Teachers[ActiveWorkNum].Count-1 then

Result:=NewBase. Teachers[ActiveWorkNum].Strings[i] else

Result:='';

end;

procedure TQuestDB.ERROR_MESSAGE_FOR_DEBUG_LEVEL (ErrID: byte);

begin

Case ErrID of

ErrWorkListLoad:

begin

SMessage ('Base read works error');

end;

ErrTeachersListLoad:

begin

SMessage ('Base read teachers error');

end;

ErrImputWorkNumberFault:

SMessage ('Imput work number fault');

ErrImputTeacherNumberFault:

SMessage ('Imput work number fault');

ErrQuestionsNotFound:

SMessage ('No questions found in base');

ErrConfigIniFileWorkSetNotFound:

SMessage ('Config file WorkSet.ini not found');

ErrReadBuiletNumber:

SMessage ('Error with read number of builet');

ErrQuestionWithInputedNumberNotFound:

SMessage ('Direstory with inputed number (QuestionNum) is not found (number out of range)');

ErrQuestionFileWithInputedNumberNotFound:

SMessage ('File with inputed number (QuestionName) is not found (number out of range)');

ErrInSelectedDirectoryNotQuestFileNameFound:

SMessage ('In the selected tirectory question file is not found');

ErrGenerationRndQuest:

SMessage ('Error by generation random question file maybe question directory is not found');

ErrInvalidFileNameTraslate:

SMessage ('Invalid Translate question name filename STR to INT maybe filename error');

end;

end;

Procedure TQuestDB.SMessage (Message_:string);

begin

SendMessage (SelfParent, WM_User+2, DWord (PChar(TransactionUser+' '+Message_)), 0);

end;

 /////////////////QUESTIONS ////////////////

function TQuestDB. UpdateQuestionsSet:boolean;

var QCount:integer;

EnumFileDir:TSearchRec;

FOptions:TIniFile;

TryConvert:TDateTime;

WorkTimeLim:string;

begin

QuestionsPathName:=ProgRootDir+'\Questions\'+ActiveWork+'\'+ActiveTeacher;

try

try

FOptions:=TIniFile. Create (QuestionsPathName+'\WorkSet.ini');

QuestCount:=FOptions. ReadInteger ('QuestionCount', 'value', - 1);

WorkTimeLim:=FOptions. ReadString ('TimeForWork', 'value', '0:00:00');

TryConvert:=StrToTime(WorkTimeLim);

WorkTimeLimit_:=WorkTimeLim;

ImgType:=FOptions. ReadString ('ImgType', 'value', 'bmp');

FOptions. Destroy;

finally

if QuestCount>0 then result:=true else result:=false;

end;

except

result:=false;

end;

end;

function TQuestDB. ConverHLrToIntNum (StringNum:string):integer;

var ProtectAssign:integer;

begin

if TestByDigit(StringNum) then

begin

ProtectAssign:=StrToInt(StringNum);

result:=ProtectAssign;

end else

begin

ERROR_MESSAGE_FOR_DEBUG_LEVEL(ErrReadBuiletNumber);

result:=-1;

end;

end;

function TQuestDB. TestByDigit (DataString:string):boolean;

var DataLen:byte;

Offs:byte;

begin

Result:=true;

DataLen:=Length(DataString);

for Offs:=1 to DataLen do

if not (DataString[Offs] in ['0'..'9']) then

begin

result:=false;

break;

end;

end;

function TQuestDB. GetBuiletByNum (Num:integer):string;

var EnumBuiletsFile:TSearchRec;

StringBuiletNum:string;

begin

Result:='';

FindFirst (QuestionsPathName+'\*', faDirectory, EnumBuiletsFile);

repeat

if EnumBuiletsFile. Name[1]<>'.' then

begin

StringBuiletNum:=EnumBuiletsFile. Name;

if TestByDigit(StringBuiletNum) then

if ConverHLrToIntNum(StringBuiletNum)=Num then

begin

result:=QuestionsPathName+'\'+EnumBuiletsFile. Name;

break;

end;

end;

until FindNext(EnumBuiletsFile)<>0;

FindClose(EnumBuiletsFile);

If Result='' then ERROR_MESSAGE_FOR_DEBUG_LEVEL(ErrQuestionWithInputedNumberNotFound);

end;

function TQuestDB. GetFileBuiletByNumBuilet (BuiletNum, FileNum:integer):string;

var EnumBuiletsNamesFile:TSearchRec;

StringBuiletNum:string;

begin

Result:='';

FindFirst (QuestionsPathName+'\'+IntToStr(BuiletNum)+'\*', faAnyFile, EnumBuiletsNamesFile);

repeat

if EnumBuiletsNamesFile. Name[1]<>'.' then

begin

StringBuiletNum:=EnumBuiletsNamesFile. Name;

Delete (StringBuiletNum, Length(StringBuiletNum) - 3,4);

if TestByDigit(StringBuiletNum) then

if ConverHLrToIntNum(StringBuiletNum)=FileNum then

begin

result:=QuestionsPathName+'\'+EnumBuiletsNamesFile. Name;

break;

end;

end;

until FindNext(EnumBuiletsNamesFile)<>0;

FindClose(EnumBuiletsNamesFile);

If Result='' then ERROR_MESSAGE_FOR_DEBUG_LEVEL(ErrQuestionFileWithInputedNumberNotFound);

end;

function TQuestDB. GetRandomFileBuilet (BuiletNum:integer):string;

var EnumBuiletsNamesFile:TSearchRec;

RndCount:integer;

FileList:HLringList;

WorkPath:string;

begin

Result:='';

FileList:=HLringList. Create;

FileList. Clear;

WorkPath:=QuestionsPathName+'\'+IntToStr(BuiletNum);

if DirectoryExists(WorkPath) then

begin

FindFirst (WorkPath+'\*', faAnyFile, EnumBuiletsNamesFile);

repeat

if EnumBuiletsNamesFile. Name[1]<>'.' then

FileList. Add (EnumBuiletsNamesFile. Name);

until FindNext(EnumBuiletsNamesFile)<>0;

FindClose(EnumBuiletsNamesFile);

if FileList. Count>0 then

begin

Randomize;

RndCount:=Random (FileList. Count);

Result:=QuestionsPathName+'\'+IntToStr(BuiletNum)+'\'+FileList. Strings[RndCount];

end;

end;

FileList. Destroy;

If Result='' then ERROR_MESSAGE_FOR_DEBUG_LEVEL(ErrGenerationRndQuest);

end;

function TQuestDB. GetTrueAnswerForBuilet (QuestionPath:string):integer;

var QuestNum:integer;

TmpStr:string;

KeyFilePath:string;

TempQuestionsList:HLringList;

begin

Result:=-1;

QuestNum:=0;

TmpStr:=ExtractFileName(QuestionPath);

Delete (TmpStr, Length(TmpStr) - Length (ExtractFileExt(TmpStr))+1, Length (ExtractFileExt(TmpStr)));

if (TestByDigit(TmpStr)) and (Length(TmpStr)<5) then

begin

QuestNum:=StrToInt(TmpStr);

end else

begin

ERROR_MESSAGE_FOR_DEBUG_LEVEL(ErrInvalidFileNameTraslate);

Result:=-1;

exit;

end;

KeyFilePath:=ExtractFilePath (ExtractFileDir(QuestionPath))+'QuestKey.ini';

if FileExists(KeyFilePath) then

begin

TempQuestionsList:=HLringList. Create;

TempQuestionsList. LoadFromFile(KeyFilePath);

Result:=StrToInt (TempQuestionsList. Strings[QuestNum]);

TempQuestionsList. Destroy;

end else ERROR_MESSAGE_FOR_DEBUG_LEVEL(ErrConfigIniFileWorkSetNotFound);

end;

function TQuestDB. SetTrueAnswerForBuilet (QuestionPath:string; TrueAnswer: Integer):boolean;

var QuestNum:integer;

TmpStr:string;

KeyFilePath:string;

TempQuestionsList:HLringList;

begin

Result:=false;

QuestNum:=0;

TmpStr:=ExtractFileName(QuestionPath);

Delete (TmpStr, Length(TmpStr) - Length (ExtractFileExt(TmpStr))+1, Length (ExtractFileExt(TmpStr)));

if (TestByDigit(TmpStr)) and (Length(TmpStr)<5) then

begin

QuestNum:=StrToInt(TmpStr);

end else ERROR_MESSAGE_FOR_DEBUG_LEVEL(ErrInvalidFileNameTraslate);

KeyFilePath:=ExtractFilePath (ExtractFileDir(QuestionPath))+'QuestKey.ini';

if FileExists(KeyFilePath) then

begin

TempQuestionsList:=HLringList. Create;

TempQuestionsList. LoadFromFile(KeyFilePath);

TempQuestionsList. Strings[QuestNum]:=IntToStr(TrueAnswer);

TempQuestionsList. SaveToFile (KeyFilePath+'_');

TempQuestionsList. Destroy;

DeleteFile(KeyFilePath);

RenameFile (KeyFilePath+'_', KeyFilePath);

Result:=true;

end else ERROR_MESSAGE_FOR_DEBUG_LEVEL(ErrConfigIniFileWorkSetNotFound);

end;

end.

unit UBaseWork;

interface

uses Windows, Messages, SysUtils, Classes, Dialogs, IniFiles;

const

ErrImputGroupNumberFault = 1;

ErrImputUserNumberFault = 2;

type

UsersDBase=record

Groups:HLringList;

Users:array of HLringList;

end;

type

TUsersDB = class

private

SelfParent:HWND;

UsersDataBase: UsersDBase;

GroupsCount:integer;

ProgRootDir:string;

ActiveGroup:string;

ActiveUser:string;

ActivStationIP:string;

ActiveGroupNum:byte;

ActiveUserNum:byte;

procedure ERROR_MESSAGE_FOR_DEBUG_LEVEL (ErrID: byte);

procedure SMessage (Message_: string);

public

property TransactionIP:string read ActivStationIP write ActivStationIP;

property ActiveUserName:string read ActiveUser;

property ActiveGroupName:string read ActiveGroup;

function SetActiveGroup (Num: byte): boolean;

function SetActiveUser (Num: byte): boolean;

function GetGroupByIndex (i: byte): string;

function GetUserByIndex (i: byte): string;

function GetGroupsStringList: string;

function GetUsersStringList: string;

constructor Create (ParentHwnd:HWND);

destructor Destroy; override;

end;

implementation

{TQuestDB}

constructor TUsersDB. Create (ParentHwnd: HWND);

var ExeName:PChar;

AppName: String;

ExeNameLen:byte;

 /////

NewSearch_:TSearchRec;

CleanName:string;

i:byte;

begin

SelfParent:=ParentHwnd;

GetMem (ExeName, 255);

ExeNameLen:=255;

GetModuleFileName (0, ExeName, ExeNameLen); // определяем имя исполняемого модуля

AppName:=StrPas(ExeName);

ProgRootDir:=ExtractFileDir(AppName);

GroupsCount:=0;

UsersDataBase. Groups:=HLringList. Create;

FindFirst (ProgRootDir+'\Groups\*', faDirectory, NewSearch_);

repeat

if NewSearch_.Name[1]<>'.' then

begin

UsersDataBase. Groups. Add (NewSearch_.Name);

inc(GroupsCount);

end;

until FindNext (NewSearch_)<>0;

FindClose (NewSearch_);

SetLength (UsersDataBase. Users, GroupsCount);

for i:=0 to GroupsCount-1 do

begin

UsersDataBase. Users[i]:=HLringList. Create;

UsersDataBase. Users[i].LoadFromFile (ProgRootDir+'\Groups\'+UsersDataBase. Groups. Strings[i]);

CleanName:=UsersDataBase. Groups. Strings[i];

Delete (CleanName, Length(CleanName) - 3,4);

UsersDataBase. Groups. Strings[i]:=CleanName;

end;

end;

destructor TUsersDB. Destroy;

var i:integer;

begin

for i:=0 to UsersDataBase. Groups. Count-1 do

begin

UsersDataBase. Users[i].Destroy;

end;

SetLength (UsersDataBase. Users, 0);

UsersDataBase. Groups. Destroy;

inherited;

end;

function TUsersDB. SetActiveGroup (Num:byte):boolean;

begin

result:=false;

if Num< UsersDataBase. Groups. Count then

begin

ActiveGroup:=UsersDataBase. Groups. Strings[Num];

ActiveGroupNum:=Num;

result:=true;

end else ERROR_MESSAGE_FOR_DEBUG_LEVEL(ErrImputGroupNumberFault);

end;

function TUsersDB. SetActiveUser (Num:byte):boolean;

begin

result:=false;

if Num< UsersDataBase. Users[ActiveGroupNum].Count then

begin

ActiveUser:=UsersDataBase. Users[ActiveGroupNum].Strings[num];

ActiveUserNum:=Num;

result:=true;

end else ERROR_MESSAGE_FOR_DEBUG_LEVEL(ErrImputUserNumberFault);

end;

procedure TUsersDB.ERROR_MESSAGE_FOR_DEBUG_LEVEL (ErrID: byte);

begin

Case ErrID of

ErrImputGroupNumberFault:

SMessage ('Imput group number fault');

ErrImputUserNumberFault:

SMessage ('Imput user number fault');

end;

end;

Procedure TUsersDB.SMessage (Message_:string);

begin

SendMessage (SelfParent, WM_User+2, DWord (PChar(ActivStationIP+' '+Message_)), 0);

end;

function TUsersDB. GetGroupByIndex (i:byte): string;

begin

if i<=UsersDataBase. Groups. Count-1 then Result:=UsersDataBase. Groups. Strings[i] else Result:='';

end;

function TUsersDB. GetUserByIndex (i:byte): string;

begin

if i<=UsersDataBase. Users[ActiveGroupNum].Count-1 then

Result:=UsersDataBase. Users[ActiveGroupNum].Strings[i] else Result:='';

end;

function TUsersDB. GetGroupsStringList: string;

var i:integer;

begin

Result:='';

for i:=0 to UsersDataBase. Groups. Count-1 do Result:=Result+UsersDataBase. Groups. Strings[i]+'|';

Result:=Result+'>';

end;

function TUsersDB. GetUsersStringList: string;

var i:integer;

begin

Result:='';

for i:=0 to UsersDataBase. Users[ActiveGroupNum].Count-1 do Result:=Result+UsersDataBase. Users[ActiveGroupNum].Strings[i]+'|';

Result:=Result+'>';

end;

end.

unit Registation;

interface

uses

Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,

Dialogs, StdCtrls, ExtCtrls;

type

HLartForm = class(TForm)

Panel2: TPanel;

ComboBox3: TComboBox;

ComboBox4: TComboBox;

Label5: TLabel;

Label6: TLabel;

Bevel2: TBevel;

Bevel3: TBevel;

Panel1: TPanel;

Bevel4: TBevel;

Bevel5: TBevel;

Label3: TLabel;

Label4: TLabel;

ComboBox1: TComboBox;

ComboBox2: TComboBox;

Bevel6: TBevel;

Bevel7: TBevel;

Panel3: TPanel;

Bevel1: TBevel;

Button1: TButton;

Button2: TButton;

Button3: TButton;

Panel4: TPanel;

procedure ComboBox1Change (Sender: TObject);

procedure Button2Click (Sender: TObject);

procedure Button1Click (Sender: TObject);

procedure Button3Click (Sender: TObject);

procedure ComboBox3Change (Sender: TObject);

procedure ComboBox2Change (Sender: TObject);

procedure FormClose (Sender: TObject; var Action: TCloseAction);

private

ServerIPAddress:string[15]; //IP адрес

Steps:byte; // номер шага регистрации (условно)

NoModify:boolean; // триггер интерфейса

function ReadServerIP: string; // чтение из файла IP.DAT информации о IP адресе сервера

public

procedure GetConnect; // Установка соединение

procedure HideWin_(YN: boolean); // скрыть элементы управления Windows (TaskBar, Deskdop)

procedure ExitProgram;

end;

var

StartForm: HLartForm;

implementation

uses MainForm;

{ /////////////////////////////////////////////////////

BEGIN

Сервисные подпрограммы

 ////////////////////////////////////////////////////// }

function HLartForm. ReadServerIP: string;

var IPInfFile:textfile;

IP:string;

begin

if fileexists (extractfilepath(application. ExeName)+'IP. Dat') then

begin

assignfile (IPInfFile, extractfilepath (application. ExeName)+'IP. Dat');

{$i-}

reset(IPInfFile);

Readln (IPInfFile, IP);

closefile(IPInfFile);

{$i+}

if ip<>'' then

begin

ReadServerIP:=IP;

end

else ReadServerIP:='127.0.0.1';

end else

begin

ReadServerIP:='127.0.0.1';

end;

end;

procedure HLartForm. HideWin_(YN:boolean);

var Wnd: hWnd;

ClassName:PChar;

ClassNameLen:byte;

Res:string;

begin

Wnd:=FindWindow ('Progman', 'Program Manager');

while wnd<>0 do

begin

wnd:=GetWindow (Wnd, GW_CHILD);

ClassNameLen:=0;

GetClassName (Wnd, ClassName, ClassNameLen);

SeHLring (Res, ClassName, ClassNameLen);

SeHLring (Res, ClassName, StrLen(ClassName));

if Res='SysListView32' then

begin

if YN=true then

begin

ShowWindow (Wnd, SW_Hide);

ShowWindow (findwINDOW('Shell_TrayWnd', nil), SW_Hide);

end else

begin

ShowWindow (Wnd, SW_Show);

ShowWindow (findwINDOW('Shell_TrayWnd', nil), SW_Show);

end;

break;

end;

end;

FreeMem (ClassName, 255);

end;

procedure HLartForm. ExitProgram;

begin

HideWin_(false);

Application. ProcessMessages;

Application. Terminate;

end;

{ /////////////////////////////////////////////////////

Сервисные подпрограммы

END

 ////////////////////////////////////////////////////// }

{ /////////////////////////////////////////////////////

BEGIN

Сетевые подпрограммы

 ////////////////////////////////////////////////////// }

procedure HLartForm. GetConnect;

begin

try

ServerIPAddress:=ReadServerIP;

TestForm. TestSocket. Address:=ServerIPAddress;

TestForm. TestSocket. Active:=true;

except

end;

end;

{ /////////////////////////////////////////////////////

Сетевые подпрограммы

END

 ////////////////////////////////////////////////////// }

{ /////////////////////////////////////////////////////

BEGIN

Обработка пользовательского интерфейса

 ////////////////////////////////////////////////////// }

procedure HLartForm. ComboBox1Change (Sender: TObject);

var Data:string;

begin

Data:=Char (NM_Register2)+Char (TestForm. MyNumber)+Char (ComboBox1. ItemIndex);

TestForm. TestSocket. Socket. SendBuf (Pointer(Data)^, Length(Data));

ComboBox3. Clear;

ComboBox4. Clear;

ComboBox2. Clear;

NoModify:=false;

Steps:=0;

end;

procedure HLartForm. Button2Click (Sender: TObject);

begin

Close;

end;

procedure HLartForm. Button1Click (Sender: TObject);

var Data:string;

begin

case Steps of // Дальнейшее действие

0:if ComboBox2. Text<>'' then

begin

NoModify:=true;

Data:=Char (NM_RegisterGetWorks)+Char (TestForm. MyNumber)+Char (ComboBox1. ItemIndex);

TestForm. TestSocket. Socket. SendBuf (Pointer(Data)^, Length(Data)); // Запрос на получение списка предметов

end;

Button3. Enabled:=true;

Panel1. Hide;

Panel2. Show; Steps:=1;

end;

1: if Panel2. Visible then

begin

if ComboBox4. Text<>'' then

begin

Data:=Char (NM_RegisterOK)+Char (TestForm. MyNumber)+

Char (ComboBox1. ItemIndex)+Char (ComboBox2. ItemIndex)+Char (ComboBox3. ItemIndex)+Char (ComboBox4. ItemIndex);

TestForm. TestSocket. Socket. SendBuf (Pointer(Data)^, Length(Data)); // Отсылка сведений для

 // окончательной регистрации

Self. Hide;

HideWin_(true);

end;

end else

begin

Panel1. Hide;

Panel2. Show;

Button3. Enabled:=true;

Steps:=1;

end;

end;

end;

procedure HLartForm. Button3Click (Sender: TObject);

begin

Panel2. Hide;

Panel1. Show;

Button3. Enabled:=false;

end;

procedure HLartForm. ComboBox3Change (Sender: TObject);

var Data:string;

begin

uses

Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,

Dialogs, WinSock, ExtCtrls, Buttons, StdCtrls, ScktComp;

const

NM_Register1 = 6; // прием списка групп

NM_Register2 = 7; // запрос на список студентов

NM_RegisterGetWorks = 66; // запрос / ответ 'список предметов'

NM_RegisterGetTeachers = 77; // запрос / ответ 'список преподователей'

NM_RegisterOK = 8; // клиент зарегистрирован

NM_Service = 31; // прием сервисной информации

NM_TestEvent = 55; // событие по ходу тестирования

NM_FileOperation = 10; // сетевая операция с файлами

NM_EndOfTest = 33; // окончание тестирования

NM_KickFromServer = 44; // отключение от сервера администратором

NM_Wait = 61;

NM_DataError = 54; // проблема с БД

procedure TTestForm. TestSocketRead (Sender: TObject;

Socket: TCustomWinSocket);

type TDataBuffer=array of byte; // буфер данных

var Data, Data1:string; // данные

SendLen:integer;

DataBuffer:TDataBuffer;

i: Word;

Command:byte;

GetSize:PInt64;

SizeOfFilename:byte;

PTrueAnswer:PWord;

PTimeForPassTest:PDouble;

begin

SendLen:=Socket. ReceiveLength; // размер принятых данных

SetLength (DataBuffer, SendLen);

Socket. ReceiveBuf (Pointer(DataBuffer)^, SendLen); // заполняем буфер

if lock then // если в режиме приема файла то продолжить прием

begin

MakePointer:=DWORD(DataBuffer);

NewFile. WriteBuffer (Pointer(MakePointer)^, SendLen);

SendedSize:=SendedSize+SendLen;

if SendedSize=FileSize then // если приняли весь файл то выход

begin

lock:=false;

NewFile. Destroy;

SetImg(FileName);

end;

end else

begin

Command:=DataBuffer[0];

case Command of

NM_Register1:

begin

MyNumber:=DataBuffer[1];

i:=2;

while i<=SendLen-3 do

begin

Data:='';

while DataBuffer[i]<>byte ('|') do

begin

Data:=Data+Char (DataBuffer[i]);

inc(i);

end;

if Data<>'' then StartForm. ComboBox1. Items. Add(Data);

if DataBuffer [i+1]=byte ('>') then break;

inc(i);

end;

end;

NM_Register2: // список студентов

begin

i:=1;

while i<=SendLen-2 do

begin

Data:='';

while DataBuffer[i]<>byte ('|') do

begin

Data:=Data+Char (DataBuffer[i]);

inc(i);

end;

if Data<>'' then StartForm. ComboBox2. Items. Add(Data);

if DataBuffer [i+1]=byte ('>') then break;

inc(i);

end;

end;

NM_RegisterGetWorks:

begin

i:=1;

StartForm. ComboBox3. Clear;

while i<=SendLen-2 do

begin

Data:='';

while DataBuffer[i]<>byte ('|') do

begin

Data:=Data+Char (DataBuffer[i]);

inc(i);

end;

if Data<>'' then StartForm. ComboBox3. Items. Add(Data);

if DataBuffer [i+1]=byte ('>') then break;

inc(i);

end;

end;

NM_RegisterGetTeachers:

begin

StartForm. ComboBox4. Clear;

i:=1;

while i<=SendLen-2 do

begin

Data:='';

while DataBuffer[i]<>byte ('|') do

begin

Data:=Data+Char (DataBuffer[i]);

inc(i);

end;

if Data<>'' then StartForm. ComboBox4. Items. Add(Data);

if DataBuffer [i+1]=byte ('>') then break;

inc(i);

end;

end;

NM_FileOperation:

begin

lock:=true;

PTrueAnswer:=Addr (DataBuffer[1]);

TrueAnswer:=PTrueAnswer^;

QuestionStyle:=DataBuffer[3];

GetSize:=Addr (DataBuffer[4]);

FileSize:=GetSize^;

SizeOfFilename:=DataBuffer[12];

Filename:=ApplicationPath+'Data.tmp'; // имя передаваемого файла

Deletefile(FileName);

NewFile:=TFileStream. Create (FileName, fmCreate);

NewFile. Position:=0;

MakePointer:=DWORD(DataBuffer)+13+SizeOfFilename; // 13=1+1+1+1+8+1

NewFile. WriteBuffer (Pointer(MakePointer)^, SendLen-13-SizeOfFilename);

SendedSize:=SendLen-13-SizeOfFilename;

if SendedSize=FileSize then // если приняли весь файл то выход

begin

lock:=false;

NewFile. Destroy;

SetImg(FileName);

end;

end;

NM_EndOfTest:

begin

SpeedButton5. Enabled:=false;

TestPassed:=true;

Mark:=DataBuffer[1];

PostMessage (Handle, WM_User, 0,0);

end;

NM_KickFromServer:

begin

TestTerminated:=true;

Label7. Hide;

Label8. Hide;

Button2. Hide;

Panel7. Caption:='Тестирование прервано';

PostMessage (Handle, WM_User, 0,0);

end;

NM_Service:

begin

QuestionsCount:=DataBuffer[1];

PTimeForPassTest:=Addr (DataBuffer[2]);

TimeForPassTest:=TTime (PTimeForPassTest^);

end;

NM_DataError:

begin

SendLen:=DataBuffer[1];

Data1:=Copy (PChar(DataBuffer), 3, SendLen)+#13+#10+#0;

PostMessage (Handle, WM_User+1, DWORD (PChar(Data1)), 1);

end;

NM_Wait: ShowMessage('Wait');

end;

end;

SetLength (DataBuffer, 0);

end;

procedure TTestForm. CloseNetworkSocket (var Message: TMessage);

begin

TestSocket. Active:=false;

TestSocket.close;

if TestForm. Visible then

begin

Panel8. Hide;

Panel7. Top:=Panel8. Top;

Panel7. Left:=Panel8. Left;

Panel7. Width:=Panel8. Width;

Panel7. Height:=Panel8. Height;

Panel7. Visible:=true;

if TestPassed then Panel7. Caption:=IntToStr(Mark) else

begin

Application. ProcessMessages;

Sleep(4000);

Application. ProcessMessages;

Application. Terminate;

end;

end else // если окно теста не открыто

begin

StartForm. Panel4. Visible:=true;

Application. ProcessMessages;

Sleep(4000);

Application. ProcessMessages;

Application. Terminate;

end;

end;

procedure TTestForm. TestSocketDisconnect (Sender: TObject;

Socket: TCustomWinSocket);

begin

if not (TestPassed or TestTerminated) then Application. Terminate;

end;

{ /////////////////////////////////////////////////////

Сетевые подпрограммы

END

 ////////////////////////////////////////////////////// }

end;

end.

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