…… if (fieldbyname('photo') as tblobfield).blobsize>0 then begin image1.Picture.bitmap.assign(fieldbyname('photo') as tblobfield);//出错位置! end else image1.Picture.assign(nil); end; ……出错提示 EinvalidGraphic with message "Bitmap image is not valid'
我的图片保存程序: image1.Picture.LoadFromFile(''); if OpenDialog1.Execute then begin filename:=extractfileext(OpenDialog1.FileName); image1.Picture.LoadFromFile(OpenDialog1.FileName); MS_JpegStream:=TMemoryStream.Create; M_BitMap:=TBitMap.Create; M_Jpeg:=TJpegImage.Create; if (filename='.bmp') or (filename='.BMP') then begin M_BitMap.LoadFromFile(OpenDialog1.FileName); M_Jpeg.Compress; M_Jpeg.Assign(M_BitMap); end else if (filename='.jpg') or (filename='.JPG') then begin M_Jpeg.LoadFromFile(OpenDialog1.FileName); end; M_Jpeg.SaveToStream(MS_JpegStream);存入数据库 SQL.Add('update cby set '); SQL.Add('photo=(:photo)'); Parameters.ParamByName('photo').LoadFromStream(MS_JpegStream,ftblob); sql.add(' where id='+inttostr(p^)); ExecSQL;
我的图片保存程序:
image1.Picture.LoadFromFile('');
if OpenDialog1.Execute then
begin
filename:=extractfileext(OpenDialog1.FileName);
image1.Picture.LoadFromFile(OpenDialog1.FileName);
MS_JpegStream:=TMemoryStream.Create;
M_BitMap:=TBitMap.Create;
M_Jpeg:=TJpegImage.Create;
if (filename='.bmp') or (filename='.BMP') then
begin
M_BitMap.LoadFromFile(OpenDialog1.FileName);
M_Jpeg.Compress;
M_Jpeg.Assign(M_BitMap);
end
else if (filename='.jpg') or (filename='.JPG') then
begin
M_Jpeg.LoadFromFile(OpenDialog1.FileName);
end;
M_Jpeg.SaveToStream(MS_JpegStream);存入数据库
SQL.Add('update cby set ');
SQL.Add('photo=(:photo)');
Parameters.ParamByName('photo').LoadFromStream(MS_JpegStream,ftblob);
sql.add(' where id='+inttostr(p^));
ExecSQL;