Mega Code Archive
How to make an ADODB Connection using OLE Automation
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Title: How to make an ADODB Connection using OLE-Automation
uses
ComObj;
function OpenConnection(ConnectionString: AnsiString): Integer;
var
ADODBConnection: OleVariant;
begin
ADODBConnection := CreateOleObject('ADODB.Connection');
ADODBConnection.CursorLocation := 3; // User client
ADODBConnection.ConnectionString := ConnectionString;
Result := 0;
try
ADODBConnection.Open;
except
Result := -1;
end;
end;
function DataBaseConnection_Test(bMessage: Boolean): AnsiString;
var
asTimeout, asUserName, asPassword, asDataSource, ConnectionString: AnsiString;
iReturn: Integer;
OldCursor: TCursor;
begin
OldCursor := Screen.Cursor;
Screen.Cursor := crHourGlass;
asTimeout := '150';
asUserName := 'NT_Server';
asPassword := 'SA';
asDataSource := 'SQL Server - My DataBase';
ConnectionString := 'Data Source = ' + asDataSource +
'User ID = ' + asUserName +
'Password = ' + asPassword +
'Mode = Read|Write;Connect Timeout = ' + asTimeout;
try
iReturn := OpenConnection(ConnectionString);
if (bMessage) then
begin
if (iReturn = 0) then
Application.MessageBox('Connection OK!', 'Information', MB_OK)
else if (iReturn = -1) then
Application.MessageBox('Connection Error!', 'Error', MB_ICONERROR + MB_OK);
end;
if (iReturn = 0) then
Result := ConnectionString
else if (iReturn = -1) then
Result := '';
finally
Screen.Cursor := OldCursor;
end;
end;
procedure TForm1.Button1Click(Sender: TObject);
begin
DataBaseConnection_Test(True);
end;
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