TByteField

How can i get the value of a TByteField in a dataset.

fieldtype in mssql = binary.

procedure TfrmFaxOut.tblxxxGetText(Sender: TField; var Text: String;
  DisplayText: Boolean);
begin
 x := Sender.Value;  // dont work !!!
end;

gipaAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

gipaAuthor Commented:
Edited text of question
0
JimBob091197Commented:
For binary data, you can use a TBlobField.
If this is what you want, then you can look at:
http://www.experts-exchange.com/topics/bin/ShowQ?qid=8630035244

What type is "x" in "x := Sender.Value"?

JB
0
WaldekCommented:
What type is x
0
Exploring ASP.NET Core: Fundamentals

Learn to build web apps and services, IoT apps, and mobile backends by covering the fundamentals of ASP.NET Core and  exploring the core foundations for app libraries.

WaldekCommented:
This may be a solution:
with field do
 begin
 if  not IsBlob then {Only for TByteFIeld}
   begin
    GetMem(Buffer,DataSize) //Must have a buffer with length datasize
 try
  if not GetData(Buffer) then // get a data from field
      messageDlg(' Field is NULL .........
    else
       // here Your work
   finally
     FreeMem(Buffer,DataSize);
 end;
end;
end;
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
gipaAuthor Commented:
Waldek ,
How can i pass the value (it should be 0 or 1)

procedure TfrmFaxOut.tblFAXOEXTRGetText(Sender: TField; var Text: String;
  DisplayText: Boolean);
var
  buffer : PChar;
begin
  with sender do begin
    if not IsBlob then {Only for TBytesField}
    begin
      GetMem(Buffer, DataSize); //Must have a buffer with length datasize
      try
        if not GetData(Buffer) then // get a data from field
          showmessage('Field is null')
        else
          // here Your work
          Text := xxx  <----- How can i pass the value (it should be 0 or 1)
      finally
        FreeMem(Buffer,DataSize);
      end;
    end;
  end;
end;

0
WaldekCommented:
You may convert PChar to string and select Buffer[1] char
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Delphi

From novice to tech pro — start learning today.