record type methods in version 7.4

BIZ TMS Scripter
1

Hi Wagner,


I noticed the release notes of 7.4 said "Support for record methods when using DefineRecordByRTTI" so I have tried to add an Aurelius TBlob record to the Scripter but I still can't use it.  I am trying to use the method LoadFromStream.  I was hopping it would be available after adding 

Scripter.DefineRecordByRTTI(TypeInfo(TBlob));
but the Scripter doesn't know about it and won't compile.  I am trying to use it as follows 

Sig.Signature.LoadFromStream(Stream);  // Sig is an Aurelius object and Signature is a TBlob
If I cast as follows 

TBlob(Sig.Signature).LoadFromStream(Stream);
it will compile and run but does nothing.  

Do you have any suggestions?

Regards

Steve
2

Hi Steve,


using records in Scripter is not that straightforward unfortunately. From properties, it's always safe to put the record instance in a separate variable. Can you please try this and let me know how it goes:


var Blob: TBlob;
...
Blob := Sig.Signature;
// use Blob methods here
Blob.Free;
3

Wagner,


Yes that works fine thank you.  Just one little change from your suggestion to create the blob rather than copy it from the property.



    Stream := TFileStream.Create(FileName, fmOpenRead); 
    Blob := TBlob.Create;
    try
      Stream.Position := 0;                     
      Blob.LoadFromStream(Stream);
      Sig.Signature := Blob;
      Manager.Save(Sig);                                     
      BI400.Commands.AFM(1,tMedium, 'Saved');  
      DeleteFile(FileName);
    finally
      Blob.Free;                         
      Stream.Free;                                          
    end;
  end;