asked on

Example of MRU in ComboBox

HI

Im making an app that can log onto different servers but only one at once. I would like it that when the app loads it can read the registry and grab a list of servers that have been used before and put them into a combobox OR if they enter a new name it stores it into the registry with the others.

I have looked at some components but they all seem to be with files and not entries in a registry like i need.

Example will get the points.
Many thanks
B.

geobul

Hi,
Form.OnCreate loads server names from HKEY_CURRENT_USER\Software\Geobul\Servers

ComboBox1.OnKeyPress adds a new server name entered in the combobox.

type
TForm1 = class(TForm)
ComboBox1: TComboBox;
procedure FormCreate(Sender: TObject);
procedure ComboBox1KeyPress(Sender: TObject; var Key: Char);
private
{ Private declarations }
public
{ Public declarations }
end;

var
Form1: TForm1;
KeyPath: string = 'Software\Geobul\Servers';
ValueNames: TStringList;

implementation

{$R *.DFM}

uses Registry;

procedure TForm1.FormCreate(Sender: TObject);
var
i: integer;
begin
with TRegistry.Create do begin
// HKEY_CURRENT_USER by default
if OpenKey(KeyPath, false) then begin
ValueNames := TStringList.Create;
try
ComboBox1.Items.Clear;
GetValueNames(ValueNames);
for i := 0 to ValueNames.Count - 1 do begin
ComboBox1.Items.Add(ReadString(ValueNames[i]));
end;
finally
ValueNames.Free;
end;
CloseKey;
end;
Free;
end;
end;

procedure TForm1.ComboBox1KeyPress(Sender: TObject; var Key: Char);
begin
if Key = #13 then begin // Enter key
if ComboBox1.Items.IndexOf(ComboBox1.Text) = -1 then begin // new server was entered
with TRegistry.Create do begin
if OpenKey(KeyPath, true) then begin
WriteString('Server'+ IntToStr(ComboBox1.Items.Count), ComboBox1.Text);
ComboBox1.Items.Add(ComboBox1.Text);
end;
end;
end;
end;
end;

Regards, Geo

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geobul

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BRowley

ASKER

Excellent. Dont suppose you know how to stop the beep on enter on the combobox do you please?

Anyway many thanks for your time and help.
Regards
Barry

geobul

Thank for the points, Barry.

About beep:

procedure TForm1.ComboBox1KeyPress(Sender: TObject; var Key: Char);
...
ComboBox1.Items.Add(ComboBox1.Text);
Key := #0; // add this line to suppress the beep
...
end;

Regards, Geo

geobul

Actually, it'd be better to place that line (Key := #0;)immediately after:
if Key = #13 then begin // Enter key

That way all beeps will be ignored. In my previous comment only the beeps when adding new items are suppressed.

Regards, Geo

BRowley

ASKER

Thank you.
regards
B.