Solved

File of records related question.

Posted on 2004-08-12
1
227 Views
Last Modified: 2010-04-05
Hi,

i just need some information regarding a file of records.

U see i have this record type :
TGsmRecord = record
  DateAdded : TdateTime;
  GsmNumber : String[25];
 end;

and a file of TGsmRecord where i save all my TGsmrecords in. and i just do Write(File,TgsmRecordVar);
I noticed each record takes up 40 bytes in the file. When i looked at the file i noticed something about the Shortstring Gsmnumber.
1.K.v..@.0111111111ewList....`..`C..,... is one record in the file where Gsmnumber equaled 0111111111 (10 chars). Notice the text after the 0111111111 part, it says "ewList" which comes from viewlist which is part of a name used for one of my controls in the program (a listview).

I like to know if this is normal ? it's probably because The shortstring has always a static length. But i find it weird that when i load up my records from the file again. The number is recognized as just 0111111111. and the "Garbage" doesn't affect my records / program at all.

I just like to know if it would ever make my program crash or sumthing or make the loaded Gsmnumber have a diffrent value from the one saved into the file due to the garbage.

0
Comment
Question by:joyrider
1 Comment
 
LVL 7

Accepted Solution

by:
LRHGuy earned 50 total points
ID: 11784898
it's normal for there to be uninitialized "trash" in records, unless you initialize them...

Before saving, try something like:

var
  R:tGsmRecord;
begin
  fillchar(R,sizeof(R),0);  //clear out record
  R.Dateadded:=  //put in date
  GSMNumber:= //put in number
  write(File,R);  //save to file
end
0

Featured Post

Optimizing Cloud Backup for Low Bandwidth

With cloud storage prices going down a growing number of SMBs start to use it for backup storage. Unfortunately, business data volume rarely fits the average Internet speed. This article provides an overview of main Internet speed challenges and reveals backup best practices.

Question has a verified solution.

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

Suggested Solutions

The uses clause is one of those things that just tends to grow and grow. Most of the time this is in the main form, as it's from this form that all others are called. If you have a big application (including many forms), the uses clause in the in…
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…
Microsoft Active Directory, the widely used IT infrastructure, is known for its high risk of credential theft. The best way to test your Active Directory’s vulnerabilities to pass-the-ticket, pass-the-hash, privilege escalation, and malware attacks …
Two types of users will appreciate AOMEI Backupper Pro: 1 - Those with PCIe drives (and haven't found cloning software that works on them). 2 - Those who want a fast clone of their boot drive (no re-boots needed) and it can clone your drive wh…

773 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