How can I do insert into Blob in SQLite using Delphi XE3 - delphi

Question

I try to insert into blob field in SQLite with Delphi XE3.
I've been using TDBXCommand and TSQLConnection like this.
but blob field is not inserted and even i cannnot get any result from query
procedure TDBXCommandHelper.Init(const AQry: String);
begin
Parameters.ClearParameters;
Close;
Prepare;
Text := AQry;
end;
procedure dmDB.InsertPicture;
const
QRY = 'INSERT INTO Memo(Picture) VALUES(?)';
var
LTransaction: TDBXTransaction;
LBlob: TDBXParameter;
LStream: TFileStream;
begin
LTransaction := FDBCon.BeginTransaction;
LStream := TFileStream.Create('d:\sample.bmp', fmOpenRead);
LBlob := TDBXParameter.Create;
try
try
FDBXCmd := FDBCon.DBXConnection.CreateCommand;
FDBXCmd.CommandType := TDBXCommandTypes.DbxSQL;
FDBXCmd.Init(QRY);
LBlob.DataType := TDBXDataTypes.BlobType;
LBlob.SubType := TDBXSubDataTypes.BinarySubType;
LBlob.Value.SetStream(LStream, False);
FDBXCmd.Parameters.AddParameter(LBlob);
FDBXCmd.ExecuteUpdate;
except
on E: Exception do
FDBCon.RollbackFreeAndNil(LTransaction);
end;
FDBCon.CommitFreeAndNil(LTransaction);
finally
FreeAndNil(LStream);
FreeAndNil(LBlob);
end;
end;
using TSQLConnection but i cannot get any result
procedure TInsertThread.NoteInsertExcute;
const
QRY = 'INSERT INTO Memo(Picture) VALUES(:Picture)';
var
LTransaction: TDBXTransaction;
LParams: TParams;
LStream: TMemoryStream;
begin
LTransaction := FDBCon.BeginTransaction;
LParams := TParams.Create(nil);
LStream := TMemoryStream.Create;
LStream.LoadFromFile(FValues.Values[NAME_PICTURE]);
try
LParams.CreateParam(ftBlob, 'Picture', ptInput);
LParams.ParamByName('Picture').LoadFromStream(LStream, ftBlob);
FDBCon.Execute(QRY, LParams);
FDBCon.CommitFreeAndNil(LTransaction);
finally
FreeAndNil(LStream);
FreeAndNil(LParams);
end;
end;

Answer 1

That's easy like:
var
ms: TMemoryStream;
sq: TSQLQuery;
begin
ms := TMemoryStream.Create;
ms.LoadFromFile('C:\Pictures\l.jpg');
if ms <> nil then
begin
sq := TSQLQuery.Create(nil);
sq.SQLConnection := con1;
sq.SQL.Text := 'update db1 set picture= :photo ;';
sq.Params.ParseSQL(sq.SQL.Text, true);
sq.Params.ParamByName('photo').LoadFromStream(ms, ftBlob);
sq.ExecSQL();
end;
.
Where con1 is a TSQLConnection.

Answer 2

You can try the following:
function GetFileAsBytesValue(AFileName: TFileName): TArray<Byte>;
var
Len: Integer;
LStream: TMemoryStream;
begin
LStream := TMemoryStream.Create;
try
LStream.LoadFromFile(AFileName);
Len := LStream.Size;
SetLength(Result, Len);
Move(LStream.Memory^, Result[0], Len);
finally
LStream.Free;
end;
end;
procedure dmDB.InsertPicture;
const
QRY = 'INSERT INTO Memo(Picture) VALUES(?)';
var
LTransaction: TDBXTransaction;
LDBXCmd: TSQLQuery;
LParam: TParam;
begin
LTransaction := FDBCon.BeginTransaction;
LDBXCmd := TSQLQuery.Create(FDBCon);
try
try
LDBXCmd.SQLConnection := FDBCon;
LDBXCmd.SQL.Text := QRY;
LParam := LDBXCmd.Params.CreateParam(ftBlob, 'Picture', ptInput);
LParam.AsBlob := GetFileAsBytesValue('d:\sample.bmp');
LDBXCmd.ExecSQL;
except
on E: Exception do
FDBCon.RollbackFreeAndNil(LTransaction);
end;
FDBCon.CommitFreeAndNil(LTransaction);
finally
LDBXCmd.Free;
end;
end;