CreateBlobStream (C++)

Description

The following example copies the data in the Notes field of Table1 or SQLDataSet1 to the Remarks field of ClientDataSet1.

Code

void __fastcall TForm1::Button1Click(TObject *Sender)
{
  TBlobType blobType = Table1Notes->BlobType;
  TStream *Stream1 = new TBlobStream(Table1Notes, bmRead);
  try
  {
        CDS2->Edit();
        // Here is a different way to create a blob stream. }
        TStream *Stream2 = CDS2->CreateBlobStream(CDS2->FieldByName("Remarks"), bmReadWrite);
        try
        {
          Stream2->CopyFrom(Stream1, Stream1->Size);
//    CDS2.Post;
//    CDS2.Active := True;
        }
        __finally
        {
          delete Stream2;
        }
  }
  __finally
  {
        delete Stream1;
  }
};

Uses

• Data.DB.TDataSet.CreateBlobStream ( fr | de | ja )
• Bde.DBTables.TBlobStream.Create ( fr | de | ja )
• Data.DB.TDataSet.Edit ( fr | de | ja )
• Data.DB.TDataSet.FieldByName ( fr | de | ja )
• System.Classes.TStream.CopyFrom ( fr | de | ja )