大家好，我是一只菜鸟，请教一下如何在应用程序将图片存储到数据库中。

Question

大家好，我是一只菜鸟，请教一下如何在应用程序将图片存储到数据库中

Answer 1

http://community.csdn.net/Expert/topic/3528/3528388.xml?temp=.4035303

Answer 2

http://community.csdn.net/Expert/topic/3522/3522502.xml?temp=.988125

Answer 3

procedure TForm1.Button1Click(Sender: TObject);
var rmFilestream:Tfilestream;
begin
rmFilestream:=TFileStream.Create('d:\2.jpg',fmopenRead);
rmFilestream.Position:=0;
try
 with adoquery1 do
 begin
   edit;
   TBlobField(FieldByName('c_blob')).loadfromStream(rmFilestream);///保存到库里
   post;
 end;
finally
rmFilestream.Free;
end;
end;procedure TForm1.BitBtn1Click(Sender: TObject);
begin
 with adoquery1 do
 begin
   TBlobField(adoquery1.FieldByName('c_blob')).SaveToFile('e:\2.jpg');
 end;
end;

Answer 4

//记得加上uses jpeg ;
//其中有些地方不是太严密，回去修改下。
//delphi7+ sql2000通过.可以保存jpeg,jpg,bmp三种格式。
unit Unit1;interfaceuses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, jpeg,DB, ADODB, ExtCtrls, Buttons, Grids, DBGrids,
  DBCtrls;type
  TForm1 = class(TForm)
    ADOConnection1: TADOConnection;
    ADOQuery1: TADOQuery;
    Button1: TButton;
    OpenDialog1: TOpenDialog;
    Edit1: TEdit;
    Image1: TImage;
    Image2: TImage;
    BitBtn1: TBitBtn;
    DBGrid1: TDBGrid;
    DataSource1: TDataSource;
    ADOQuery1pic: TBlobField;
    ADOQuery1borj: TStringField;
    procedure Button1Click(Sender: TObject);
    procedure BitBtn1Click(Sender: TObject);  private
    { Private declarations }
  public
    { Public declarations }
  end;var
  Form1: TForm1;
  s:string;
  s1:string;
implementation{$R *.dfm}procedure TForm1.Button1Click(Sender: TObject);
var
bitmap1:tbitmap;
pjpg:tjpegimage;
pic:TMemoryStream;begin
pjpg:=tjpegimage.Create;
if opendialog1.Execute
    then
     s:=opendialog1.FileName ;
     s1:=extractfileext(s);
         
     if (uppercase(s1) ='.JPG' ) or (uppercase(s1)='.JPEG') // 图片格式一定要大写
       THEN
         begin
              pjpg.LoadFromFile(s );
              pic:=TMemoryStream.Create;
              pjpg.SaveToStream(pic);
              image1.Picture.Bitmap.Assign(pjpg);              pic.Position:=0;
              adoquery1.Insert ;
              adoquery1.FieldByName('borj').VALUE := 2;
              TBlobField(adoquery1.FieldByName('pic')).LoadFromStream(pic);
              adoquery1.post;
              pic.Free;
              pjpg.free;
        end ;    if (uppercase(s1)='.BMP')    then           begin
              edit1.Text :=uppercase(s1);             image1.Picture.LoadFromFile(s);
             adoquery1.Insert ;
             adoquery1.FieldByName('pic').Assign(image1.Picture.Graphic);
             adoquery1.FieldByName('borj').VALUE := 3;             adoquery1.Post ;
          end;
 end;  procedure TForm1.BitBtn1Click(Sender: TObject);   var
    jpeg:tjpegimage;
      begin
       image1.Picture.Graphic :=nil;
            with adoquery1 do
                 begin
                    if adoquery1.FieldByName('borj').Value =3   // bmp
                    then
                     image2.Picture.Bitmap.Assign(fieldbyname('pic'))  ;                     if adoquery1.FieldByName('borj').Value =2  //jpge;                     then
                        begin
                               jpeg:=tjpegimage.Create ;
                                try
                                 jpeg.Assign(adoquery1.FieldByName('pic') );
                                  image2.Picture.Graphic:=jpeg;
                                   finally
                                   jpeg.Free ;
                                 end;
                        end;                 end ;
                    end;end.