C++ Builder简单电话簿Demo例子 v1.09（C++代码风格）

//--------------------------------------------------------------------------- #pragma hdrstop //#define _DEBUG_ #include "PhoneBook.h" #include "Unit1.h" //--------------------------------------------------------------------------- #pragma package(smart_init) PhoneBook *myPhoneBook; PhoneBook::~PhoneBook() { file.close(); file.clear(); } void PhoneBook::initPhoneBook() { file.close(); file.clear(); if(Form1->SaveDialog1->Execute()) { filename=Form1->SaveDialog1->FileName; #ifdef _DEBUG_ ShowMessage(filename); #endif file.open(filename.c_str(),ios::in|ios::out|ios::trunc|ios::binary); if(file.is_open()) { Form1->StatusBar1->Panels->Items[0]->Text=ExtractFileName(filename); newContact(); iCurrentNo=0; ShowMessage(filename+" 文件创建成功."); } else ShowMessage("文件创建失败."); } } void PhoneBook::openPhoneBook() { file.close(); file.clear(); if(Form1->OpenDialog1->Execute()) { filename=Form1->OpenDialog1->FileName; file.open(filename.c_str(),ios::in|ios::out|ios::binary); if(file.is_open()) { Form1->StatusBar1->Panels->Items[0]->Text=ExtractFileName(filename); newContact(); iCurrentNo=0; ShowMessage(filename+" 文件打开成功."); firstContact(); } else ShowMessage("文件打开失败."); } } void PhoneBook::newContact() { Form1->edtName->Text=""; Form1->edtName->SetFocus(); Form1->edtAge->Text=""; Form1->edtTel->Text=""; Form1->mmoCompany->Lines->Text=""; memset(&aContact,0,sizeof(Contact)); Form1->bbSave->Enabled=true; Form1->bbModify->Enabled=false; Form1->StatusBar1->Panels->Items[1]->Text="新记录"; } void PhoneBook::saveContact() { if(!file.is_open()) { ShowMessage("请先新建电话簿，或打开电话簿."); } else { if(getContactFromInput()) { file.seekp(0,ios_base::end); #ifdef _DEBUG_ ShowMessage("文件当前位置："+IntToStr(file.tellp())); #endif // file.clear(); file.write(reinterpret_cast<char *>(&aContact),sizeof(Contact)); if(file.fail()) { ShowMessage("保存记录失败."); file.clear(); } else { ShowMessage("保存记录成功."); file.flush(); Form1->bbSave->Enabled=false; lastContact(); } } } } bool PhoneBook::getContactFromInput() { int age; memset(&aContact,0,sizeof(Contact)); if(Form1->edtName->Text==""||Form1->edtName->Text.Length()>MaxNameLength) { ShowMessage("姓名为空或者姓名太长，请重新输入."); return false; } if(Form1->radMale->Checked==false&&Form1->radFemale->Checked==false) { ShowMessage("请选择性别."); return false; } if(Form1->edtAge->Text==""||(age=Form1->edtAge->Text.ToInt())<0||age>150) { ShowMessage("年龄为空或者年龄有误，请重新输入."); return false; } if(Form1->edtTel->Text==""||Form1->edtTel->Text.Length()>MaxTelLength) { ShowMessage("电话为空或者电话太长，请重新输入."); return false; } if(Form1->mmoCompany->Lines->Text.Length()>MaxCompanyLength) { ShowMessage("公司名字太长，请重新输入."); return false; } strcpy(aContact.name,Form1->edtName->Text.c_str()); if(Form1->radMale->Checked==true) strcpy(aContact.sex,"男"); else if(Form1->radFemale->Checked==true) strcpy(aContact.sex,"女"); aContact.age=Form1->edtAge->Text.ToInt(); strcpy(aContact.tel,Form1->edtTel->Text.c_str()); strcpy(aContact.company,Form1->mmoCompany->Lines->Text.c_str()); return true; } void PhoneBook::modifyContact() { if(!file.is_open()) { ShowMessage("请先新建电话簿，或打开电话簿."); } else if(iCurrentNo<1) ShowMessage("请先定位记录."); else { if(getContactFromInput()) { file.seekp((iCurrentNo-1)*sizeof(Contact),ios_base::beg); file.write(reinterpret_cast<char *>(&aContact),sizeof(Contact)); if(file.fail()) { ShowMessage("修改记录失败."); file.clear(); } else { ShowMessage("修改记录成功."); file.flush(); } } } } void PhoneBook::firstContact() { if(!file.is_open()) { ShowMessage("请先新建电话簿，或打开电话簿."); } else { file.seekg(0,ios_base::end); streampos pos=file.tellg(); if((unsigned)pos<sizeof(Contact)) { ShowMessage("电话簿无电话记录，请返回."); return; } else { file.seekg(0,ios_base::beg); file.read(reinterpret_cast<char *>(&aContact),sizeof(Contact)); if(file.fail()) { ShowMessage("读取记录失败."); file.clear(); return; } displayContact(); iCurrentNo=1; Form1->StatusBar1->Panels->Items[1]->Text="当前记录："+IntToStr(iCurrentNo); } } } void PhoneBook::displayContact() const { Form1->edtName->Text=AnsiString(aContact.name); if(AnsiString(aContact.sex)=="男") Form1->radMale->Checked=true; else if(AnsiString(aContact.sex)=="女") Form1->radFemale->Checked=true; Form1->edtAge->Text=IntToStr(aContact.age); Form1->edtTel->Text=AnsiString(aContact.tel); Form1->mmoCompany->Lines->Text=AnsiString(aContact.company); Form1->bbSave->Enabled=false; Form1->bbModify->Enabled=true; } void PhoneBook::prevContact() { if(!file.is_open()) { ShowMessage("请先新建电话簿，或打开电话簿."); return; } file.seekg(0,ios_base::end); streampos pos=file.tellg(); if((unsigned)pos<sizeof(Contact)) { ShowMessage("电话簿无电话记录，请返回."); return; } else if(iCurrentNo<2) ShowMessage("无上一条，请返回."); else { file.seekg((iCurrentNo-2)*sizeof(Contact),ios_base::beg); file.read(reinterpret_cast<char *>(&aContact),sizeof(Contact)); if(file.fail()) { ShowMessage("读取记录失败."); file.clear(); return; } displayContact(); iCurrentNo--; Form1->StatusBar1->Panels->Items[1]->Text="当前记录："+IntToStr(iCurrentNo); } } void PhoneBook::nextContact() { if(!file.is_open()) { ShowMessage("请先新建电话簿，或打开电话簿."); } else { file.seekg(0,ios_base::end); streampos pos=file.tellg(); if((unsigned)pos<sizeof(Contact)) { ShowMessage("电话簿无电话记录，请返回."); return; } else if((unsigned)pos<(iCurrentNo+1)*sizeof(Contact)) ShowMessage("无下一条，请返回."); else { file.seekg(iCurrentNo*sizeof(Contact),ios_base::beg); file.read(reinterpret_cast<char *>(&aContact),sizeof(Contact)); if(file.fail()) { ShowMessage("读取记录失败."); file.clear(); return; } displayContact(); iCurrentNo++; Form1->StatusBar1->Panels->Items[1]->Text="当前记录："+IntToStr(iCurrentNo); } } } void PhoneBook::lastContact() { if(!file.