如何把一幅图片导入数据库中呢？

hymen1 2001-11-06 05:07:43

如题：
能有例子吗？

数据中已经有了图片字段啦！！

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hymen1 2001-11-07

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先谢了！

zfmich 2001-11-06

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var

T: TBlobField;
begin
Query1.Close;
T := TBlobField.Create(Self);
T.FieldName := 'Images';
T.Name := Query1.Name + T.FieldName;
T.Index := Query1.FieldCount;
T.DataSet := Query1;
Query1.FieldDefs.UpDate;
Query1.Open;

end;

zfmich 2001-11-06

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用TBLOBFIELD类型变量，具体查帮助，有例子。

cobi 2001-11-06

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//保存
procedure TForm1.ImageIntoDBBitBtnClick(Sender: TObject);
begin
try
with Query1 do
begin
close;
sql.clear;
sql.add('insert into img (imga) values(:imag)');
end;
try
if FileName<>'' then
ParamByName('Img').LoadfromFile(FileName,ftGraphic)
else
ParamByName('Img') .asBlob:='';
Query1.ExecSQL;
except
ShowMessage('图片保存出错！');
exit;
end;
except
end;
end;

//读取
procedure TForm1.ImageFromDBBitBtnClick(Sender: TObject);
var
m_jpegstream:tmemorystream;
begin
with Query1 do
begin
close;
sql.clear;
sql.Add('select imga from img');
try
Open;
except
exit;
end;
end;
if (Query1.FieldByName('imga') as tblobfield).asstring='' then
begin
exit;
end
else
begin
try
try
m_jpegStream:=TMemoryStream.Create;
(Query1.fieldbyname('imga') as TBlobField).SaveToStream(m_JpegStream);
m_JpegStream.Position:=0;
try
image2.Picture.Graphic:=nil;
image2.Picture.Graphic:=TJpegImage.Create;
image2.Picture.Graphic.LoadFromStream(m_JpegStream); //读Jpeg
except
Image2.Picture.Bitmap.LoadFromStream(m_JpegStream); //读Bmp
end;
except
end;
finally
m_JpegStream.Free;
Query1.Close;
Query1.UnPrepare;
end;
end;
end;

//BMP转换为JPG
procedure TStuXXSLForm.LoadImageBitBtnClick(Sender: TObject);
var
MyJpeg:TJpegImage;
begin
inherited;
if OpenPictureDialog1.Execute then
begin
FileName:=OpenPictureDialog1.FileName;
Image1.Picture.LoadFromFile(FileName);
if ExtractFileExt(FileName)='.Bmp' then
begin
MyJpeg:= TJpegImage.Create;
MyJpeg.Assign(Image1.Picture.Bitmap);
FileName:='Photo.Jpg';
MyJpeg.SaveToFile(FileName);
MyJpeg.Free;
end;
end;
end;

newyj 2001-11-06