注: 无需odbc配置
{*
* MySQL Helper v1.0
* 2015.6.19
* 说明:
* 这是一个操作MySQL的类,该类必须和libmysql.dll,dbxmys.dll两个文件一起使用.
* 安装:
* 将dll拷贝到C:\Windows\System32下和项目目录下,发行的时候放到exe目录下即可.
* 使用:
* //使用insert,update,delete语句时请使用:TMySQLHelper.ExecSQL();返回受影响行数Integer;
* //使用select语句时请使用TMySQLHelper.Query();返回数据集TSQLQuery;
* 测试:
* WIN7 SP1 X86 , MySQL 5.6.17 , Delphi XE 测试通过.
* ==========================================
* var
* MySQLHelper : TMySQLHelper;
* begin
* MySQLHelper := TMySQLHelper.Create;
* MySQLHelper.User_name := 'root';
* MySQLHelper.Password := 'root';
* MySQLHelper.Database := 'Test';
* ShowMessage('影响行数:'+IntToStr(MySQLHelper.ExecSQL('INSERT INTO test(name)values(''FangJun'')')));
* MySQLHelper.Free;
* end;
* ==========================================
* var
* MySQLHelper : TMySQLHelper;
* SQLQuery : TSQLQuery;
* begin
* MySQLHelper := TMySQLHelper.Create;
* MySQLHelper.User_name := 'root';
* MySQLHelper.Password := 'root';
* MySQLHelper.Database := 'Test';
* SQLQuery := TSQLQuery.Create(nil);
* SQLQuery := MySQLHelper.Query('select * from test');
* while not SQLQuery.Eof do
* begin
* ShowMessage('姓名:'+VarToStr(SQLQuery.FieldValues['name']);
* SQLQuery.Next;
* end;
* MySQLHelper.MySQLClose;
* MySQLHelper.Free;
* end;
* ==========================================
}
unit MySQLHelper; interface uses
SysUtils,StdCtrls,Classes,Variants,DB,SqlExpr,DBXMySQL; type
TMySQLHelper = class(TObject)
private
_PORT : Integer;
_HOST : string;
_DATABASE : string;
_USER_NAME : string;
_PASSWORD : string;
_SERVERCHARSET : string;
_SQLQuery : TSQLQuery;
_SQLConnection : TSQLConnection; procedure Set_PORT(const Value: Integer);
procedure Set_HOST(const Value: string);
procedure Set_DATABASE (const Value: string);
procedure Set_USER_NAME(const Value: string);
procedure Set_PASSWORD (const Value: string);
procedure Set_SERVERCHARSET(const Value: string);
function MySQLConnection:TSQLConnection; public
constructor Create; overload;
property Post:Integer write Set_PORT;
property Host:string write Set_HOST;
property Database:string write Set_DATABASE;
property User_name:string write Set_USER_NAME;
property Password:string write Set_PASSWORD;
property ServerCharSet:string write Set_SERVERCHARSET; function ExecSQL(const SQL:string):Integer;
function Query(const SQL:string):TSQLQuery;
procedure MySQLClose;
end; implementation //初始化
constructor TMySQLHelper.Create;
begin
_HOST := '127.0.0.1';
_PORT := ;
_SERVERCHARSET := 'utf8';
end; //执行 SQL 语句 INSERT , UPDATE , DELETE 返回影响行数
function TMySQLHelper.ExecSQL(const SQL:string):Integer;
begin
if not Assigned(_SQLQuery) then
_SQLQuery := TSQLQuery.Create(nil);
with _SQLQuery do
begin
Close;
SQL.Clear;
SQLConnection := MySQLConnection;
end;
try
_SQLQuery.SQL.Add(SQL);
result := _SQLQuery.ExecSQL;
except on E: Exception do
raise Exception.Create('SQL语句执行失败 ：'+E.Message);
end;
MySQLClose;
end; //执行 SQL 语句 Select 返回 数据集
function TMySQLHelper.Query(const SQL:string):TSQLQuery;
begin
if not Assigned(_SQLQuery) then
_SQLQuery := TSQLQuery.Create(nil);
with _SQLQuery do
begin
Close;
SQL.Clear;
SQLConnection := MySQLConnection;
end;
try
_SQLQuery.SQL.Add(SQL);
_SQLQuery.Open;
_SQLQuery.Active := true;
result := _SQLQuery;
except on E: Exception do
raise Exception.Create('SQL语句查询失败 ：'+E.Message);
end;
end; //关闭连接
procedure TMySQLHelper.MySQLClose;
begin
_SQLQuery.Close;
_SQLConnection.Close;
end; //连接MySQL 返回 TSQLConnection
function TMySQLHelper.MySQLConnection:TSQLConnection;
begin
if not Assigned(_SQLConnection) then
_SQLConnection := TSQLConnection.Create(nil);
with _SQLConnection do
begin
Close;
GetDriverFunc := 'getSQLDriverMYSQL';
LibraryName := 'dbxmys.dll';
VendorLib := 'LIBMYSQL.dll';
DriverName:= 'MySQL';
Params.Values['drivername']:= 'MySQL';
Params.Values['port'] := IntToStr(_PORT);
Params.Values['hostname'] := _HOST;
Params.Values['database'] := _DATABASE;
Params.Values['user_name'] := _USER_NAME;
Params.Values['password'] := _PASSWORD;
Params.Values['ServerCharSet'] := _SERVERCHARSET;
end;
try
_SQLConnection.Open;
_SQLConnection.Connected := true;
result := _SQLConnection;
except on E: Exception do
raise Exception.Create('数据库连接错误：'+E.Message);
end;
end; procedure TMySQLHelper.Set_PORT(const Value: Integer);
begin
if Value<> then
_PORT := Value
end; procedure TMySQLHelper.Set_HOST (const Value: string);
begin
if Value<>'' then
_HOST := Value
end; procedure TMySQLHelper.Set_DATABASE (const Value: string);
begin
_DATABASE := Value
end; procedure TMySQLHelper.Set_USER_NAME (const Value: string);
begin
_USER_NAME := Value;
end; procedure TMySQLHelper.Set_PASSWORD (const Value: string);
begin
_PASSWORD := Value;
end; procedure TMySQLHelper.Set_SERVERCHARSET (const Value: string);
begin
if Value<>'' then
_SERVERCHARSET := Value
end; end.