Creating a table using code

Question:
Hi,Each time l try to create a table using code-not the database explorer, i get an error message:access violation at address 0042f540 read of address 7466654c.Whats the problem, how can l create a table using delphi code only?

Answer:
The only reason I can think of that explains this is that you’re not instantiating the TTable variable. For instance,

MyTable.CreateTable;

alone will not work. You have to set up the database, tablename, and tabletype, and fielddefs properties. Here’s a code snippet that I know works:

var  tbl, sTbl : TTable;  typStr : String;  ch : Char;begin  {Create and set up the Destination Table}  tbl := TTable.Create(Application);  with tbl do begin    SessionName := ThrSes.SessionName;    DatabaseName := ExtractFilePath(TblName);    TableName := ExtractFileName(TblName);    TableType := ttParadox;    FieldDefs.Add('Field1', ftString, 10, False);    FieldDefs.Add('Field2', ftString, 25, False);    CreateTable;    Free;  end;

This is something that I pulled out from one of my own programs, and I know that it works – though I’ve edited it a bit for simplicity. You can use this code as a template.

Share the Post:
Share on facebook
Share on twitter
Share on linkedin

Overview

The Latest

microsoft careers

Top Careers at Microsoft

Microsoft has gained its position as one of the top companies in the world, and Microsoft careers are flourishing. This multinational company is efficiently developing popular software and computers with other consumer electronics. It is a dream come true for so many people to acquire a high paid, high-prestige job

your company's audio

4 Areas of Your Company Where Your Audio Really Matters

Your company probably relies on audio more than you realize. Whether you’re creating a spoken text message to a colleague or giving a speech, you want your audio to shine. Otherwise, you could cause avoidable friction points and potentially hurt your brand reputation. For example, let’s say you create a

chrome os developer mode

How to Turn on Chrome OS Developer Mode

Google’s Chrome OS is a popular operating system that is widely used on Chromebooks and other devices. While it is designed to be simple and user-friendly, there are times when users may want to access additional features and functionality. One way to do this is by turning on Chrome OS