咏南中间件(datasnap)新接口演示

咏南中间件(datasnap)新接口演示

/// <author>cxg 2020-12-19</author>
/// datasnap http客户端接口调用演示

unit Unit2;

interface

uses
  untGlobal,
  ClientClassesUnit1, MsgPack, Winapi.Windows, Winapi.Messages, System.SysUtils,
  System.Variants, System.Classes, Vcl.Graphics, Vcl.Controls, Vcl.Forms,
  Vcl.Dialogs,  Vcl.ToolWin, Vcl.ComCtrls, Data.DB,
  Datasnap.DBClient, Vcl.Grids, Vcl.DBGrids, Data.DbxDatasnap,
  Data.DBXCommon, Data.DbxHTTPLayer, Datasnap.DSClientRest;

type
  TForm2 = class(TForm)
    ToolBar1: TToolBar;
    ToolButton1: TToolButton;
    DBGrid1: TDBGrid;
    DBGrid2: TDBGrid;
    ClientDataSet1: TClientDataSet;
    DataSource1: TDataSource;
    ClientDataSet2: TClientDataSet;
    DataSource2: TDataSource;
    DSRestConnection1: TDSRestConnection;
    ToolButton2: TToolButton;
    ToolButton3: TToolButton;
    ToolButton4: TToolButton;
    ToolButton5: TToolButton;
    ToolButton6: TToolButton;
    procedure ToolButton1Click(Sender: TObject);
    procedure FormCreate(Sender: TObject);
    procedure ToolButton2Click(Sender: TObject);
    procedure ToolButton3Click(Sender: TObject);
    procedure ToolButton4Click(Sender: TObject);
    procedure ToolButton5Click(Sender: TObject);
    procedure ToolButton6Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form2: TForm2;

implementation

{$R *.dfm}

procedure TForm2.FormCreate(Sender: TObject);
begin
  DSRestConnection1.Host := '127.0.0.1';   //中间件ip and port
  DSRestConnection1.Port := 9000;
  DSRestConnection1.Context := 'yn/';
end;

procedure TForm2.ToolButton1Click(Sender: TObject);
//查询
var
  m: Tmethod1Client;
  send, recv: TMsgPack;
begin
  send := TMsgPack.Create;
  m := Tmethod1Client.Create(DSRestConnection1);
  send.Force('cmd').AsString := 'query';   //命令字
  send.Force('accountno').AsString := '1';  //数据库帐套号
  send.Force('tablenum').AsInteger := 2;    //查询几个表？
  send.Force('sql1').AsString := 'select top 100 * from tunit';
  send.Force('sql2').AsString := 'select * from tgoods';
  recv := m.remoteMethod(send);
  if recv.Force('result').AsBoolean then
  begin
    ClientDataSet1.Data := DeCompressData(recv.Force('dataset1').AsVariant);  //unzip
    ClientDataSet2.Data := DeCompressData(recv.Force('dataset2').AsVariant);  //unzip
  end;
  m.Free;
end;

procedure TForm2.ToolButton2Click(Sender: TObject);
//保存
var
  m: Tmethod1Client;
  send, recv: TMsgPack;
begin
  if ClientDataSet1.State in dsEditModes then
    ClientDataSet1.Post;
  if ClientDataSet2.State in dsEditModes then
    ClientDataSet2.Post;
  if ClientDataSet1.ChangeCount = 0 then
    Exit;
  if ClientDataSet2.ChangeCount = 0 then
    Exit;
  send := TMsgPack.Create;
  m := Tmethod1Client.Create(DSRestConnection1);
  send.Force('cmd').AsString := 'save'; //命令字
  send.Force('accountno').AsString := '1'; //数据库帐套号
  send.Force('tablenum').AsInteger := 2;
  send.Force('tablename1').AsString := 'tunit';
  send.Force('tablename2').AsString := 'tgoods';
  send.Force('delta1').AsVariant := ClientDataSet1.Delta;
  send.Force('delta2').AsVariant := ClientDataSet2.Delta;
  recv := m.remoteMethod(send);
  if recv.Force('result').AsBoolean then
  begin
    ClientDataSet1.MergeChangeLog;
    ClientDataSet2.MergeChangeLog;
  end
  else
  begin
    ClientDataSet1.Cancel;
    ClientDataSet2.Cancel;
  end;
  m.Free;
end;

procedure TForm2.ToolButton3Click(Sender: TObject);
//存储过程
var
  m: Tmethod1Client;
  send, recv: TMsgPack;
begin
  send := TMsgPack.Create;
  m := Tmethod1Client.Create(DSRestConnection1);
  send.Force('cmd').AsString := 'spopen';//命令字
  send.Force('accountno').AsString := '1';//数据库帐套号
  send.Force('spname').AsString := '存储过程名';
  send.Force('params').AsString := '@参数1=1;@参数2=2';
  recv := m.remoteMethod(send);
  if recv.Force('result').AsBoolean then
  begin
    ClientDataSet1.Data := DeCompressData(recv.Force('dataset1').AsVariant);  //unzip
  end;
  m.Free;
end;

procedure TForm2.ToolButton4Click(Sender: TObject);
//execsql
var
  m: Tmethod1Client;
  send, recv: TMsgPack;
begin
  send := TMsgPack.Create;
  m := Tmethod1Client.Create(DSRestConnection1);
  send.Force('cmd').AsString := 'execsql';//命令字
  send.Force('accountno').AsString := '1';//数据库帐套号
  send.Force('sql').AsString := 'insert into tunit(unitid,unitname) values (''1'', ''2'')';
  recv := m.remoteMethod(send);
  if recv.Force('result').AsBoolean then
  begin
    ShowMessage('execsql ok');
  end;
  m.Free;
end;

procedure TForm2.ToolButton5Click(Sender: TObject);
//downfile
var
  m: Tmethod1Client;
  send, recv: TMsgPack;
begin
  send := TMsgPack.Create;
  m := Tmethod1Client.Create(DSRestConnection1);
  send.Force('cmd').AsString := 'downfile';//命令字
  send.Force('filenum').AsInteger := 2;//下载几个文件？
  send.Force('filename1').AsString := 'filename1';
  send.Force('filename2').AsString := 'filename2';
  recv := m.remoteMethod(send);
  if recv.Force('result').AsBoolean then
  begin
    recv.Force('file1').SaveBinaryToFile('filename1');
    recv.Force('file2').SaveBinaryToFile('filename2');
  end else ShowMessage('downfile fail');
  m.Free;
end;

procedure TForm2.ToolButton6Click(Sender: TObject);
//upfile
var
  m: Tmethod1Client;
  send, recv: TMsgPack;
begin
  send := TMsgPack.Create;
  m := Tmethod1Client.Create(DSRestConnection1);
  send.Force('cmd').AsString := 'upfile';//命令字
  send.Force('filenum').AsInteger := 2;//上传几个文件？
  send.Force('filename1').AsString := 'filename1';
  send.Force('filename2').AsString := 'filename2';
  send.Force('file1').LoadBinaryFromFile('filename1');
  send.Force('file2').LoadBinaryFromFile('filename2');
  recv := m.remoteMethod(send);
  if recv.Force('result').AsBoolean then
  begin
    ShowMessage('upfile ok');
  end else ShowMessage('upfile fail');
  m.Free;
end;

end.