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What's wrong with this?

Posted on 2004-04-16
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174 Views
Last Modified: 2010-04-05
I have two issues, and I'm not sure if they are related, but here is the code...

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, DB, ADODB, Menus, StdCtrls, ExtCtrls;

type
  TForm1 = class(TForm)
    ADOConnection1: TADOConnection;
    ADOTable1: TADOTable;
    RadioGroup1: TRadioGroup;
    ListBox1: TListBox;
    Memo1: TMemo;
    procedure FormCreate(Sender: TObject);
    procedure RadioGroup1Click(Sender: TObject);
    procedure ListBox1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.FormCreate(Sender: TObject);
var
 Data : String;
 i: Integer;
 AccessTableNames: TStringList;
begin

 AccessTableNames   := TStringList.Create;
 Data := ExtractFilePath(Application.ExeName) + '\snippits.mdb';
 try
  ADOConnection1.ConnectionString :=
            'Provider=Microsoft.Jet.OLEDB.4.0;' +
            'Data Source=' + Data +';'+
            'Persist Security Info=False';
  ADOConnection1.Open;
  ADOConnection1.GetTableNames(AccessTableNames);
  ADOConnection1.Close;
 finally
  for i := 0 to AccessTableNames.Count -1 do
   RadioGroup1.Items.Add(AccessTableNames[i]);
  AccessTableNames.Free;
 end;
end;

procedure TForm1.RadioGroup1Click(Sender: TObject);
var
  Tbl:TADOTable;
begin
  Tbl:=TADOTable.Create(Self);
    try
      Tbl.Connection:=ADOConnection1;
      Tbl.TableName:=RadioGroup1.Items[RadioGroup1.ItemIndex];
      Tbl.Open;

        with Tbl do
        begin
          First;
          ListBox1.Items.Clear;
            while not eof do
            begin
              ListBox1.Items.Add(FieldByName('Title').text);
              Next;
            end;
        end;
    finally
      Tbl.Active:=False;
      Tbl.Free;
end;
end;

procedure TForm1.ListBox1Click(Sender: TObject);
var
  Tbl:TADOTable;
begin
   Memo1.Clear;
   Tbl:=TADOTable.Create(Self);
   try
    Tbl.Connection:=ADOConnection1;
    Tbl.TableName:=RadioGroup1.Items[RadioGroup1.ItemIndex];
    Tbl.Open;
  tbl.Active := false;
     tbl.Filter := 'Title = ' + QuotedStr(ListBox1.Items.ValueFromIndex[radiogroup1.itemindex]);
     tbl.Filtered := True;
  tbl.Active := True;
    with tbl do
    begin
   {------------------------------------------------------
    This isn't working because the first char of my 'Title' string is being trimmed off
   --------------------------------------------------------}
      Memo1.Text := Fieldbyname('Code').asstring;
    end;
       finally
  {------------------------------------------------------
     One of my table names is 'c++' and so I'm getting an error when I select it in my RadioGroup
  -------------------------------------------------------}
      Tbl.Active:=False;
      Tbl.Free;
  end;
end;


end.


// Thanks in advance!
// Gabe
0
Comment
Question by:fibdev
  • 2
3 Comments
 
LVL 3

Author Comment

by:fibdev
ID: 10847134
So, to sum it up

My filter is returning undesirable results...

'Hello World' is showing up as 'ello World'.

This is causing my Memo1 to not be populated.  :(
0
 
LVL 27

Accepted Solution

by:
kretzschmar earned 50 total points
ID: 10848181
instead of

     tbl.Filter := 'Title = ' + QuotedStr(ListBox1.Items.ValueFromIndex[radiogroup1.itemindex]);
     
use


     tbl.Filter := 'Title = ' + QuotedStr(ListBox1.Items[radiogroup1.itemindex]);
     
meikl ;-)
0
 
LVL 3

Author Comment

by:fibdev
ID: 10849402
Well,

I have it working, but I'm sure there's a better way...

procedure TForm1.ListBox1Click(Sender: TObject);
var
  Tbl:TADOTable;
  CodeText : String;
begin
   Memo1.Clear;
   Tbl:=TADOTable.Create(Self);
   try
    Tbl.Connection:=ADOConnection1;
    Tbl.TableName:=RadioGroup1.Items[RadioGroup1.ItemIndex];
    Tbl.Open;
  tbl.Active := false;
     tbl.Filter := 'Title = ' + QuotedStr(ListBox1.Items[ListBox1.ItemIndex]);
     tbl.Filtered := True;
 form1.Caption := 'Fibdev SnipSnap 1.0 - Code Library' + ' (' + tbl.tablename + ')';
  tbl.Active := True;
    with tbl do
    begin
      CodeText := FieldbyName('Code').AsString;
    end;
      Memo1.lines.Add(CodeText);
       finally
      Tbl.Active:=False;
      Tbl.Free;
  end;
end;
0

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