--存
str_sql := 'update photo set photo = :photo ';
str_sql := str_sql + ' where sex = ''女''';
with qry_for_show do
begin
Close;
SQL.Clear;
SQL.Add(str_sql);
Parameters.ParamByName('photo').Assign(img2.Picture.Graphic);
ExecSQL;
end;
--读
procedure Tfrmpicsave.BitBtn1Click(Sender: TObject);
var
Stream:TMemoryStream;
Jpg:TdxPNGImage;
begin
qry_for_show.Close;
qry_for_show.SQL.Text:='SELECT * FROM HLDJPHOTO'; // 查询图片
qry_for_show.Open;
if not qry_for_show.FieldByName('photo').IsNull then
begin
Stream:=TMemoryStream.Create ;
Jpg:=TdxPNGImage.Create ;
TBlobField(qry_for_show.FieldByName('photo')).SaveToStream(Stream); // 显示的转换为BlobField并保存到内存流
TBlobField(qry_for_show.FieldByName('photo')).SaveToFile(ExtractFilePath(Application.ExeName) + 'www'); // 显示的转换为BlobField并保存到内存流
Stream.Position :=0;
jpg.LoadFromStream(Stream); // 加载图片
p_w_picpath2.Picture.Assign(Jpg);
end
else
begin
p_w_picpath2.Picture :=nil;
end;
Stream.Free;
Jpg.Free;
end;
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