tool/Unit1.pas

   1 unit Unit1;
   2
   3 interface
   4
   5 uses
   6   System.SysUtils, System.Types, System.UITypes, System.Classes,
   7   System.Variants,
   8   FMX.Types, FMX.Controls, FMX.Forms, FMX.Dialogs, FMX.Ani, FMX.Layouts,
   9   FMX.Gestures, FMX.Graphics, FMX.Surfaces,
  10   FireDAC.Stan.Intf, FireDAC.Stan.Option, FireDAC.Stan.Param,
  11   FireDAC.Stan.Error, FireDAC.DatS, FireDAC.Phys.Intf, FireDAC.DApt.Intf,
  12   FireDAC.Stan.Async, FireDAC.DApt, FireDAC.UI.Intf, FireDAC.Stan.Def,
  13   FireDAC.Stan.Pool, FireDAC.Phys, FireDAC.Phys.MySQL, FireDAC.Phys.MySQLDef,
  14   Data.Bind.Controls, Data.Bind.EngExt, FMX.Bind.DBEngExt, System.Rtti,
  15   System.Bindings.Outputs, FMX.Bind.Editors, Data.Bind.Components, Data.DB,
  16   FMX.Controls.Presentation, FMX.Edit, FMX.Bind.Navigator, Data.Bind.DBScope,
  17   FireDAC.Comp.Client, FireDAC.Comp.DataSet, FMX.Objects, FMX.StdCtrls,
  18   FireDAC.FMXUI.Wait, FireDAC.Comp.UI, FireDAC.Comp.BatchMove;
  19
  20 type
  21   TForm2 = class(TForm)
  22     Image1: TImage;
  23     FDTable1: TFDTable;
  24     FDConnection1: TFDConnection;
  25     Edit1: TEdit;
  26     BindingsList1: TBindingsList;
  27     FDGUIxWaitCursor1: TFDGUIxWaitCursor;
  28     BindSourceDB1: TBindSourceDB;
  29     NavigatorBindSourceDB12: TBindNavigator;
  30     LinkControlToField1: TLinkControlToField;
  31     Button1: TButton;
  32     OpenDialog1: TOpenDialog;
  33     Label1: TLabel;
  34     LinkPropertyToFieldText: TLinkPropertyToField;
  35     LinkPropertyToFieldBitmap: TLinkPropertyToField;
  36     FDQuery1: TFDQuery;
  37     Button2: TButton;
  38     FDBatchMove1: TFDBatchMove;
  39     Button3: TButton;
  40     procedure Button1Click(Sender: TObject);
  41     procedure FormCreate(Sender: TObject);
  42     procedure Button2Click(Sender: TObject);
  43     procedure Button3Click(Sender: TObject);
  44   private
  45     { private \90é\8c¾ }
  46     procedure streamToField(stream, field: TStream);
  47   public
  48     { public \90é\8c¾ }
  49   end;
  50
  51 var
  52   Form2: TForm2;
  53
  54 implementation
  55
  56 {$R *.fmx}
  57
  58 procedure TForm2.Button1Click(Sender: TObject);
  59 var
  60   s: TStream;
  61   t: TMemoryStream;
  62 begin
  63   if OpenDialog1.Execute = true then
  64   begin
  65     FDTable1.Edit;
  66     s := FDTable1.CreateBlobStream(FDTable1.FieldByName('source'), bmWrite);
  67     t := TMemoryStream.Create;
  68     try
  69       t.LoadFromFile(OpenDialog1.FileName);
  70       streamToField(t, s);
  71       FDTable1.Post;
  72     finally
  73       s.Free;
  74       t.Free;
  75     end;
  76   end;
  77 end;
  78
  79 procedure TForm2.Button2Click(Sender: TObject);
  80 begin
  81   with FDQuery1.SQL do
  82   begin
  83     Clear;
  84     Add('drop table images;');
  85     Add('create table images(id int primary key, name varchar(10), source mediumblob);');
  86   end;
  87   FormCreate(Sender);
  88 end;
  89
  90 procedure TForm2.FormCreate(Sender: TObject);
  91 var
  92   i: Integer;
  93   s, t: TStream;
  94 begin
  95   FDQuery1.ExecSQL;
  96   FDTable1.Open;
  97   if FDTable1.RecordCount = 0 then
  98   begin
  99     for i := 1 to 50 do
 100       FDTable1.AppendRecord([i, Format('slide%d.jpg', [i]), nil]);
 101     FDTable1.First;
 102     for i := 1 to 10 do
 103     begin
 104       FDTable1.Edit;
 105       s := FDTable1.CreateBlobStream(FDTable1.FieldByName('source'), bmWrite);
 106       t := TResourceStream.Create(HInstance, Format('Resource_%d', [i]),
 107         RT_RCDATA);
 108       try
 109         streamToField(t,s);
 110         FDTable1.Post;
 111       finally
 112         s.Free;
 113       end;
 114       FDTable1.Next;
 115     end;
 116   end;
 117   FDTable1.First;
 118 end;
 119
 120 procedure TForm2.streamToField(stream, field: TStream);
 121 var
 122   bmp: TBitmapSurface;
 123   pm: TBitmapCodecSaveParams;
 124   img: TBitmap;
 125 begin
 126   pm.Quality := 100;
 127   bmp := TBitmapSurface.Create;
 128   img:=TBitmap.Create;
 129   try
 130     img.LoadFromStream(stream);
 131     bmp.Assign(img);
 132     TBitmapCodecManager.SaveToStream(field, bmp, '.jpg', @pm);
 133   finally
 134     bmp.Free;
 135     img.Free;
 136   end;
 137 end;
 138
 139 procedure TForm2.Button3Click(Sender: TObject);
 140 begin
 141   FDTable1.Edit;
 142   FDTable1.FieldByName('source').Assign(nil);
 143   FDTable1.Post;
 144 end;
 145
 146 end.