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关于sqlite3数据库

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2017-08-23
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//---------------------------------------------------------------------------

#include

#pragma hdrstop

#include "Unit1.h"

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

#pragma package(smart_init)

#pragma link "ZConnection"

#pragma link "ZAbstractDataset"

#pragma link "ZAbstractRODataset"

#pragma link "ZDataset"

#pragma resource "*.dfm"

TForm1 *Form1;

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

__fastcall TForm1::TForm1(TComponent* Owner)

: TForm(Owner)

{

}

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

void __fastcall TForm1::Button4Click(TObject *Sender)

{

this->Close();

}

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

void __fastcall TForm1::FormCreate(TObject *Sender)

{

Memo1->Clear();

Button2->Enabled = false;

Button3->Enabled = false;

Button5->Enabled = false;

Button6->Enabled = false;

Button7->Enabled = false;

Button8->Enabled = false;

name_edit->Enabled = false;

age_edit->Enabled = false;

Edit1->Enabled = false;

CB1->Enabled = false;

Label1->Enabled = false;

Label2->Enabled = false;

OpenDialog1->Filter = "SQLite(*.DB3,*.DB,*.SLI)|*.DB3;*.DB;*.SLI|All File|*.*";

ZConnection1->Protocol = "sqlite-3";

ZQuery1->Connection = ZConnection1;

CB1->Clear();

CB1->Items->Add("name");

CB1->Items->Add("age");

CB1->ItemIndex = 0 ;

m = "";

}

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

void __fastcall TForm1::Button1Click(TObject *Sender)

{

if (OpenDialog1->Execute())

{

AnsiString sDBPath = OpenDialog1->FileName;

Memo1->Lines->Add("数据库位置:");

Memo1->Lines->Add(sDBPath);

ZConnection1->Database = sDBPath;

// ZConnection1->Database = "test_1.db";

Button2->Enabled = true;

}

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

void __fastcall TForm1::Button2Click(TObject *Sender)

{

ZConnection1->Connect();

if (ZConnection1->Connected)

{

Memo1->Clear();

Memo1->Lines->Add("连接成功！");

Memo1->Lines->Add("数据库位置:");

Memo1->Lines->Add(ZConnection1->Database);

Button2->Enabled = false;

Button3->Enabled = true;

Button5->Enabled = true;

Button6->Enabled = true;

Button7->Enabled = true;

Button8->Enabled = true;

name_edit->Enabled = true;

age_edit->Enabled = true;

Edit1->Enabled = true;

CB1->Enabled = true;

Label1->Enabled = true;

Label2->Enabled = true;

LoadData();

}

else

{

Memo1->Lines->Add("连接失败！");

}

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

void __fastcall TForm1::LoadData()

{

Memo1->Lines->Add("---------------------------------");

AnsiString sql;

sql.printf("select * from user;");

ExecuteSQL(sql,false);

while (!ZQuery1->Eof)

{

AnsiString name = ZQuery1->FieldByName("name")->AsString;

int age = ZQuery1->FieldByName("age")->AsInteger;

AnsiString str = name + " | "+ IntToStr(age);

Memo1->Lines->Add(str);

ZQuery1->Next();

}

void __fastcall TForm1::Button3Click(TObject *Sender)

{

ZConnection1->Disconnect();

Memo1->Clear();

Memo1->Lines->Add("连接已断开,谢谢！");

Button2->Enabled = true;

Button3->Enabled = false;

Button5->Enabled = false;

Button6->Enabled = false;

Button7->Enabled = false;

Button8->Enabled = false;

name_edit->Enabled = false;

age_edit->Enabled = false;

Edit1->Enabled = false;

CB1->Enabled = false;

Label1->Enabled = false;

Label2->Enabled = false;

}

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

void __fastcall TForm1::ExecuteSQL(AnsiString sql,bool bSelect)

{

ZQuery1->Close();

ZQuery1->SQL->Clear();

ZQuery1->SQL->Add(sql);

if (bSelect)

{

ZQuery1->Open();

}

else

{

ZQuery1->ExecSQL();

ZQuery1->Active = true;

}

void __fastcall TForm1::Button6Click(TObject *Sender)

{

AnsiString name = name_edit->Text;

AnsiString s_age = age_edit->Text;

if (name.Trim().IsEmpty() || s_age.Trim().IsEmpty())

{

ShowMessage("姓名或年龄不能为空");

return ;

}

int age = StrToInt(s_age);

if ( age > 99 || age

{

ShowMessage ("年龄错误!");

return ;

}

AnsiString sql;

sql.printf("insert into user values ('%s','%d');",name,age);

ExecuteSQL(sql,true);

Memo1->Lines->Add("*********insert succeed*********");

LoadData();

}

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

void __fastcall TForm1::Button7Click(TObject *Sender)

{

AnsiString name = name_edit->Text;

AnsiString s_age = age_edit->Text;

if (name.Trim().IsEmpty() || s_age.Trim().IsEmpty())

{

ShowMessage("姓名或年龄不能为空");

return ;

}

int age = StrToInt(s_age);

if ( age > 99 || age

{

ShowMessage ("年龄错误!");

return ;

}

AnsiString sql;

sql.sprintf("select * from user;");

ExecuteSQL(sql, true);

ZQuery1->Append();

ZQuery1->FieldByName("name")->AsString = name;

ZQuery1->FieldByName("age")->AsInteger = age;

ZQuery1->Post();

Memo1->Lines->Add("*********insert succeed*********");

LoadData();

}

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

void __fastcall TForm1::Button8Click(TObject *Sender)

{

AnsiString sql;

AnsiString ddata = Edit1->Text.Trim();

if (CB1->ItemIndex == 0)

{

sql.printf("select * from user where [name] = '%s';",ddata);

ExecuteSQL(sql, false);

int n = ZQuery1->FieldByName("age")->AsInteger;

if (n==0)

{

ShowMessage("没有该数据");

return;

}

else

{

AnsiString sql_1;

sql_1.printf("delete from user where [name] = '%s';",ddata);

ExecuteSQL(sql_1, true);

Memo1->Lines->Add("----------------------");

Memo1->Lines->Add("| 删除成功! |") ;

Memo1->Lines->Add("----------------------") ;

LoadData();

}

else if (CB1->ItemIndex == 1)

{

if (!IsInteger(ddata))

{

ShowMessage("请输入数字");

Edit1->Clear();

return ;

}

int n_age = StrToInt(ddata);

sql.printf("select * from user where [age] = '%d';",n_age);

ExecuteSQL(sql, false);

AnsiString m= ZQuery1->FieldByName("name")->AsString;

if ( m == "" )

{

ShowMessage("没有该数据");

return;

}

else

{

AnsiString sql_1;

sql_1.printf("delete from user where [age] = '%d';",n_age);

ExecuteSQL(sql_1, true);

Memo1->Lines->Add("----------------------");

Memo1->Lines->Add("| 删除成功! |") ;

Memo1->Lines->Add("----------------------") ;

LoadData();

}

Edit1->Clear();

}

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

void __fastcall TForm1::Button5Click(TObject *Sender)

{

AnsiString sql;

AnsiString ddata = Edit1->Text.Trim();

if (ddata == "")

{

LoadData();

}

if (CB1->ItemIndex == 0)

{

int n;

sql.printf("select * from user where [name] = '%s';",ddata);

ExecuteSQL(sql, false);

n = ZQuery1->FieldByName("age")->AsInteger;

if (n == 0 && ddata != "")

{

ShowMessage("没有该数据");

Edit1->Clear();

return ;

}

while (!ZQuery1->Eof)

{

n = ZQuery1->FieldByName("age")->AsInteger;

AnsiString str = "* " + ddata + " | "+ IntToStr(n)+ " *";

Memo1->Lines->Add("***********************");

Memo1->Lines->Add(str);

Memo1->Lines->Add("************************");

ZQuery1->Next();

}

if (CB1->ItemIndex == 1 && ddata != "")

{

if (!IsInteger(ddata) )

{

ShowMessage("请输入数字");

Edit1->Clear();

return ;

}

int n_age = StrToInt(ddata);

sql.printf("select * from user where [age] = '%d';",n_age);

ExecuteSQL(sql, false);

m = ZQuery1->FieldByName("name")->AsString;

if (m == "" && ddata != "")

{

ShowMessage("没有该数据");

Edit1->Clear();

return ;

}

while (!ZQuery1->Eof)

{

m= ZQuery1->FieldByName("name")->AsString;

AnsiString str = "* " + m + " | "+ IntToStr(n_age)+ " *";

Memo1->Lines->Add("***********************");

Memo1->Lines->Add(str);

Memo1->Lines->Add("************************");

ZQuery1->Next();

}

Edit1->Clear();

}

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

void __fastcall TForm1::age_editKeyPress(TObject *Sender, char &Key)

{

AnsiString str = age_edit->Text;

if (Key >0x60 && Key

Key = 0;

if(str.Trim().Length() >= 2 && Key != 0x08 && Key != 0x2E)

{

Key = 0;

}

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

bool __fastcall TForm1::IsInteger(AnsiString s)

{

float x;

if (TryStrToFloat(s,x) == true)

return true;

else

return false;

}

Unit1.h

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

#include

#pragma hdrstop

#include "Unit1.h"

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

#pragma package(smart_init)

#pragma link "ZConnection"

#pragma link "ZAbstractDataset"

#pragma link "ZAbstractRODataset"

#pragma link "ZDataset"

#pragma resource "*.dfm"

TForm1 *Form1;

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

__fastcall TForm1::TForm1(TComponent* Owner)

: TForm(Owner)

{

}

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

void __fastcall TForm1::Button4Click(TObject *Sender)

{

this->Close();

}

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

void __fastcall TForm1::FormCreate(TObject *Sender)

{

Memo1->Clear();

Button2->Enabled = false;

Button3->Enabled = false;

Button5->Enabled = false;

Button6->Enabled = false;

Button7->Enabled = false;

Button8->Enabled = false;

name_edit->Enabled = false;

age_edit->Enabled = false;

Edit1->Enabled = false;

CB1->Enabled = false;

Label1->Enabled = false;

Label2->Enabled = false;

OpenDialog1->Filter = "SQLite(*.DB3,*.DB,*.SLI)|*.DB3;*.DB;*.SLI|All File|*.*";

ZConnection1->Protocol = "sqlite-3";

ZQuery1->Connection = ZConnection1;

CB1->Clear();

CB1->Items->Add("name");

CB1->Items->Add("age");

CB1->ItemIndex = 0 ;

m = "";

}

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

void __fastcall TForm1::Button1Click(TObject *Sender)

{

if (OpenDialog1->Execute())

{

AnsiString sDBPath = OpenDialog1->FileName;

Memo1->Lines->Add("数据库位置:");

Memo1->Lines->Add(sDBPath);

ZConnection1->Database = sDBPath;

// ZConnection1->Database = "test_1.db";

Button2->Enabled = true;

}

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

void __fastcall TForm1::Button2Click(TObject *Sender)

{

ZConnection1->Connect();

if (ZConnection1->Connected)

{

Memo1->Clear();

Memo1->Lines->Add("连接成功！");

Memo1->Lines->Add("数据库位置:");

Memo1->Lines->Add(ZConnection1->Database);

Button2->Enabled = false;

Button3->Enabled = true;

Button5->Enabled = true;

Button6->Enabled = true;

Button7->Enabled = true;

Button8->Enabled = true;

name_edit->Enabled = true;

age_edit->Enabled = true;

Edit1->Enabled = true;

CB1->Enabled = true;

Label1->Enabled = true;

Label2->Enabled = true;

LoadData();

}

else

{

Memo1->Lines->Add("连接失败！");

}

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

void __fastcall TForm1::LoadData()

{

Memo1->Lines->Add("---------------------------------");

AnsiString sql;

sql.printf("select * from user;");

ExecuteSQL(sql,false);

while (!ZQuery1->Eof)

{

AnsiString name = ZQuery1->FieldByName("name")->AsString;

int age = ZQuery1->FieldByName("age")->AsInteger;

AnsiString str = name + " | "+ IntToStr(age);

Memo1->Lines->Add(str);

ZQuery1->Next();

}

void __fastcall TForm1::Button3Click(TObject *Sender)

{

ZConnection1->Disconnect();

Memo1->Clear();

Memo1->Lines->Add("连接已断开,谢谢！");

Button2->Enabled = true;

Button3->Enabled = false;

Button5->Enabled = false;

Button6->Enabled = false;

Button7->Enabled = false;

Button8->Enabled = false;

name_edit->Enabled = false;

age_edit->Enabled = false;

Edit1->Enabled = false;

CB1->Enabled = false;

Label1->Enabled = false;

Label2->Enabled = false;

}

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

void __fastcall TForm1::ExecuteSQL(AnsiString sql,bool bSelect)

{

ZQuery1->Close();

ZQuery1->SQL->Clear();

ZQuery1->SQL->Add(sql);

if (bSelect)

{

ZQuery1->Open();

}

else

{

ZQuery1->ExecSQL();

ZQuery1->Active = true;

}

void __fastcall TForm1::Button6Click(TObject *Sender)

{

AnsiString name = name_edit->Text;

AnsiString s_age = age_edit->Text;

if (name.Trim().IsEmpty() || s_age.Trim().IsEmpty())

{

ShowMessage("姓名或年龄不能为空");

return ;

}

int age = StrToInt(s_age);

if ( age > 99 || age

{

ShowMessage ("年龄错误!");

return ;

}

AnsiString sql;

sql.printf("insert into user values ('%s','%d');",name,age);

ExecuteSQL(sql,true);

Memo1->Lines->Add("*********insert succeed*********");

LoadData();

}

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

void __fastcall TForm1::Button7Click(TObject *Sender)

{

AnsiString name = name_edit->Text;

AnsiString s_age = age_edit->Text;

if (name.Trim().IsEmpty() || s_age.Trim().IsEmpty())

{

ShowMessage("姓名或年龄不能为空");

return ;

}

int age = StrToInt(s_age);

if ( age > 99 || age

{

ShowMessage ("年龄错误!");

return ;

}

AnsiString sql;

sql.sprintf("select * from user;");

ExecuteSQL(sql, true);

ZQuery1->Append();

ZQuery1->FieldByName("name")->AsString = name;

ZQuery1->FieldByName("age")->AsInteger = age;

ZQuery1->Post();

Memo1->Lines->Add("*********insert succeed*********");

LoadData();

}

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

void __fastcall TForm1::Button8Click(TObject *Sender)

{

AnsiString sql;

AnsiString ddata = Edit1->Text.Trim();

if (CB1->ItemIndex == 0)

{

sql.printf("select * from user where [name] = '%s';",ddata);

ExecuteSQL(sql, false);

int n = ZQuery1->FieldByName("age")->AsInteger;

if (n==0)

{

ShowMessage("没有该数据");

return;

}

else

{

AnsiString sql_1;

sql_1.printf("delete from user where [name] = '%s';",ddata);

ExecuteSQL(sql_1, true);

Memo1->Lines->Add("----------------------");

Memo1->Lines->Add("| 删除成功! |") ;

Memo1->Lines->Add("----------------------") ;

LoadData();

}

else if (CB1->ItemIndex == 1)

{

if (!IsInteger(ddata))

{

ShowMessage("请输入数字");

Edit1->Clear();

return ;

}

int n_age = StrToInt(ddata);

sql.printf("select * from user where [age] = '%d';",n_age);

ExecuteSQL(sql, false);

AnsiString m= ZQuery1->FieldByName("name")->AsString;

if ( m == "" )

{

ShowMessage("没有该数据");

return;

}

else

{

AnsiString sql_1;

sql_1.printf("delete from user where [age] = '%d';",n_age);

ExecuteSQL(sql_1, true);

Memo1->Lines->Add("----------------------");

Memo1->Lines->Add("| 删除成功! |") ;

Memo1->Lines->Add("----------------------") ;

LoadData();

}

Edit1->Clear();

}

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

void __fastcall TForm1::Button5Click(TObject *Sender)

{

AnsiString sql;

AnsiString ddata = Edit1->Text.Trim();

if (ddata == "")

{

LoadData();

}

if (CB1->ItemIndex == 0)

{

int n;

sql.printf("select * from user where [name] = '%s';",ddata);

ExecuteSQL(sql, false);

n = ZQuery1->FieldByName("age")->AsInteger;

if (n == 0 && ddata != "")

{

ShowMessage("没有该数据");

Edit1->Clear();

return ;

}

while (!ZQuery1->Eof)

{

n = ZQuery1->FieldByName("age")->AsInteger;

AnsiString str = "* " + ddata + " | "+ IntToStr(n)+ " *";

Memo1->Lines->Add("***********************");

Memo1->Lines->Add(str);

Memo1->Lines->Add("************************");

ZQuery1->Next();

}

if (CB1->ItemIndex == 1 && ddata != "")

{

if (!IsInteger(ddata) )

{

ShowMessage("请输入数字");

Edit1->Clear();

return ;

}

int n_age = StrToInt(ddata);

sql.printf("select * from user where [age] = '%d';",n_age);

ExecuteSQL(sql, false);

m = ZQuery1->FieldByName("name")->AsString;

if (m == "" && ddata != "")

{

ShowMessage("没有该数据");

Edit1->Clear();

return ;

}

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