如何保存数据库连接参数代码及步骤详解

//RWini.pas
{
模块名称：配置文件读写
编写人：blue
编写日期：2003-4-26
模块功能：从系统配置文件中读取系统运行所需的各项参数
　将系统运行所需的各项参数写入系统配置文件
　生成数据库连接字符串
}
unit RWini;
interface
uses INIFiles;
const strINIname = 'db.ini';//INI文件的文件名，大家根据具体情况修改
var
　iniParam : TINIFile;
　strLocal : String;
　procedure readParam(out server:String;
out database:string;out user:string;out password:string);
　procedure writeParam(server:string;database:string;
user:string;password:string);
　function getConnStr:string;
implementation

　procedure readParam(out server:String;
out database:string;out user:string;out password:string);
　begin
//从配置文件中读取数据库连接参数
server := iniParam.ReadString('dbParam','Data Source','');
database := iniParam.ReadString('dbParam','Initial Catalog','');
user := iniParam.ReadString('dbParam','User ID','');
password := iniParam.ReadString('dbParam','Password','');
　end;

　procedure writeParam(server:string;database:string;
user:string;password:string);
　begin
//将数据库连接参数写入配置文件
iniParam.WriteString('dbParam','Data Source',server);
iniParam.WriteString('dbParam','Initial Catalog',database);
iniParam.WriteString('dbParam','User ID',user);
iniParam.WriteString('dbParam','Password',password);
　end;

　function getConnStr:String;
　var
server,database,user,password : String;
　begin
//生成数据库连接串
readParam(server,database,user,password);
result := 'Provider=SQLOLEDB.1;
Password=' + password + ';Persist Security Info=True;
User ID=' + user + ';Initial Catalog=' + database + ';
Data Source=' + server; 
　end;

initialization
　getDir(0,strLocal);
　iniParam := TINIFile.Create(strLocal + '\' + strINIname);

finalization
　iniParam.Free;
end.