Solved

TByteField

Posted on 1998-02-03
6
249 Views
Last Modified: 2010-05-18
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;

0
Comment
Question by:gipa
  • 3
  • 2
6 Comments
 

Author Comment

by:gipa
ID: 1358162
Edited text of question
0
 
LVL 5

Expert Comment

by:JimBob091197
ID: 1358163
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
 
LVL 2

Expert Comment

by:Waldek
ID: 1358164
What type is x
0
Free Tool: Path Explorer

An intuitive utility to help find the CSS path to UI elements on a webpage. These paths are used frequently in a variety of front-end development and QA automation tasks.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

 
LVL 2

Accepted Solution

by:
Waldek earned 50 total points
ID: 1358165
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
 

Author Comment

by:gipa
ID: 1358166
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
 
LVL 2

Expert Comment

by:Waldek
ID: 1358167
You may convert PChar to string and select Buffer[1] char
0

Featured Post

Free Tool: Postgres Monitoring System

A PHP and Perl based system to collect and display usage statistics from PostgreSQL databases.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Have you ever had your Delphi form/application just hanging while waiting for data to load? This is the article to read if you want to learn some things about adding threads for data loading in the background. First, I'll setup a general applica…
In my programming career I have only very rarely run into situations where operator overloading would be of any use in my work.  Normally those situations involved math with either overly large numbers (hundreds of thousands of digits or accuracy re…
With Secure Portal Encryption, the recipient is sent a link to their email address directing them to the email laundry delivery page. From there, the recipient will be required to enter a user name and password to enter the page. Once the recipient …

791 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question