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Database

Posted on 1998-09-08
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Last Modified: 2010-04-06
How to access the records of a Table manually? For example, i want to put a string recorded in a field called 'Desc', in a Edit.
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Question by:lifeson
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2 Comments
 
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Expert Comment

by:vladika
ID: 1339093
Edit.Text := MyField.AsString
or
Edit.Text := MyTable.FieldByName('MyField').AsString
or
use DBEdit


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Accepted Solution

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Marcius earned 50 total points
ID: 1339094
Lifeson,

Vladika has really answered this question, but I will provide some more information.

You need to select the correct record in your database table first. To do this, you can use TDataset.Locate or TTable.FindKey. Assuming a table with an integer MyKey as primary key, the syntax would be:

procedure TForm1.SelectMyRecord(MyKey: Integer);
begin
  if MyTable.FindKey([MyKey]) then
     MyEdit.Text := MyTable.FieldByName('MyField').AsString;
end;

The locate is more complicated, but can be used to find a record without using key values.

procedure TForm1.SelectMyRecord(FirstVal, SecondVal: Integer);
begin
  if MyTable.Locate('FirstSearchField;SecondSearchField',
                    VarArrayOf([FirstVal,SecondVal]),[]) then
     MyEdit.Text := MyTable.FieldByName('MyField').AsString;
end;

I hope this helps,

Marcius.
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