login.cpp

来自「使用改进的遗传算法实现简单的高校排课」· C++ 代码 · 共 111 行

//---------------------------------------------------------------------------

#include <vcl.h>
#pragma hdrstop
#include "sys.h"
#include "login.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TLoginForm *LoginForm;
//---------------------------------------------------------------------------
__fastcall TLoginForm::TLoginForm(TComponent* Owner)
        : TForm(Owner)
{
}
//---------------------------------------------------------------------------
void __fastcall TLoginForm::BtLoginClick(TObject *Sender)
{
     if (EdUser->Text.IsEmpty())
     {
        ShowMessage("请输入用户名, 用户名不能为空！");
        EdUser->SetFocus();
     }
     else
     {
         ADOQuery1->Close();
         ADOQuery1->SQL->Clear();
         ADOQuery1->SQL->Add("select * From student");
         ADOQuery1->SQL->Add("where Name = :Name and Pass = :Pass");
         ADOQuery1->Parameters->ParamByName("Name")->Value=EdUser->Text;
         ADOQuery1->Parameters->ParamByName("Pass")->Value=EdPass->Text;
         ADOQuery1->Open();
         if(ADOQuery1->RecordCount!=1)
         {
             ADOQuery1->Close();
             ADOQuery1->SQL->Clear();
             ADOQuery1->SQL->Add("select * From teacher");
             ADOQuery1->SQL->Add("where Name = :Name and Pass = :Pass");
             ADOQuery1->Parameters->ParamByName("Name")->Value=EdUser->Text;
             ADOQuery1->Parameters->ParamByName("Pass")->Value=EdPass->Text;
             ADOQuery1->Open();
             if (ADOQuery1->RecordCount!=1)
             {
                 i++;
                 if(i<3)
                 {
                    ShowMessage("用户名或口令错误，请您重新输入！");
                    EdUser->SetFocus();
                 }
                 else if (i==3)
                 {
                    ShowMessage("非法用户，无权登陆该系统！");
                    Application->Terminate();
                 }
             }
             else
             {
                 //MainForm->SPlan->Enabled = true;
                 //MainForm->SCous->Enabled = true;
                 //MainForm->SRoom->Enabled = true;
                 //MainForm->SStud->Enabled = true;
                 //MainForm->STeach->Enabled = true;
                 //MainForm->SClass->Enabled = true;
                 //MainForm->SAuto->Enabled = true;
                 //MainForm->SQClas->Enabled = false;
                 //MainForm->SQTeach->Enabled = true;
                 Close();
             }
         }
         else if(ADOQuery1->RecordCount==1)
         {
             //MainForm->SPlan->Enabled = false;
             //MainForm->SCous->Enabled = false;
             //MainForm->SRoom->Enabled = false;
             //MainForm->SStud->Enabled = false;
             //MainForm->STeach->Enabled = false;
             //MainForm->SClass->Enabled = false;
             //MainForm->SAuto->Enabled = false;
             //MainForm->SQClas->Enabled = true;
             //MainForm->SQTeach->Enabled = false;
            Close();
         }
   }
}
//---------------------------------------------------------------------------

void __fastcall TLoginForm::FormCreate(TObject *Sender)
{
       ClientHeight = 208;
       ClientWidth = 331;
       Left = 339;
       Top = 233;
       Width = 318;
       Height = 242;
}
//---------------------------------------------------------------------------

void __fastcall TLoginForm::BtQuitClick(TObject *Sender)
{
     Close();
}
//---------------------------------------------------------------------------

void __fastcall TLoginForm::FormClose(TObject *Sender,
      TCloseAction &Action)
{
     Action = caFree;
}
//---------------------------------------------------------------------------