插入修改 保存图象
bmTemp:=TBitmap.Create;
ms:=TMemoryStream.Create;
try
qryFace.Close;
qryFace.SQL.Clear;
qryFace.SQL.Add('update video_face_image set face_image2=:face_image2');
qryFace.SQL.Add(Format('where event_id=%d',[qryPrepare.FieldByName('event_id').AsInteger]));
bmTemp.LoadFromFile('c:\face2.bmp');
bmTemp.SaveToStream(ms);
qryFace.Parameters.ParamByName('face_image2').LoadFromStream(ms,ftBlob);
finally
ms.Free;
bmTemp.Free;
end;
如何在Image组件中显示
bmTemp:=TBitmap.Create;
ms:=TMemoryStream.Create;
try
TBlobField(qryFace.FieldByName('face_image1')).SaveToStream(ms);
ms.Position:=0; //最最重要的一点
bmTemp.LoadFromStream(ms);
imgFace1.Picture.Bitmap:=bmTemp;
finally
ms.Free;
bmTemp.Free;
end;
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