//以下为获取栏目列表,By 尘缘
$dsql = new DedeSql(false);
$menuquerysql = "Select typedir,typename from `#@__arctype` where reid='0'";
$dsql->Execute('me',$menuquerysql);
while($row = $dsql->getarray())
{
$menus= $menus."

将以上代码加到plus/download.php中，位置任意，在模板中调用< ?=menus?>即可.
这里主要是分析了DEDE的Mysql函数，感觉好用。
记号一下。


//
//用指定参数初始数据库信息
//
function SetSource($host,$username,$pwd,$dbname,$dbprefix="dede_")
{
$this->dbHost = $host;
$this->dbUser = $username;
$this->dbPwd = $pwd;
$this->dbName = $dbname;
$this->dbPrefix = $dbprefix;
$this->result["me"] = 0;
}
function SelectDB($dbname)
{
mysql_select_db($dbname);
}
//
//设置SQL里的参数
//
function SetParameter($key,$value){
$this->parameters[$key]=$value;
}
//
//连接数据库
//
function Open($pconnect=false)
{
global $dsql;
//连接数据库
if($dsql && !$dsql->isClose) $this->linkID = $dsql->linkID;
else
{
if(!$pconnect){ $this->linkID = @mysql_connect($this->dbHost,$this->dbUser,$this->dbPwd); }
else{ $this->linkID = @mysql_pconnect($this->dbHost,$this->dbUser,$this->dbPwd); }
//复制一个对象副本
CopySQLPoint($this);
}
//处理错误，成功连接则选择数据库
if(!$this->linkID){
//echo $this->GetError();
$this->DisplayError("DedeCms错误警告：连接数据库失败，可能数据库密码不对或数据库服务器出错，如未安装本系统，请先运行安装程序，如果已经安装，请检查MySQL服务或修改include/config_base.php的配置！");
exit();
}
@mysql_select_db($this->dbName);
$mysqlver = explode('.',$this->GetVersion());
$mysqlver = $mysqlver[0].'.'.$mysqlver[1];
if($mysqlver>4.0) @mysql_query("SET NAMES '".$GLOBALS['cfg_db_language']."';",$this->linkID);
if($mysqlver>5.0) @mysql_query("SET sql_mode='' ;", $this->linkID);
return true;
}
//
//获得错误描述
//
function GetError()
{
$str = ereg_replace("'|\"","`",mysql_error());
return $str;
}

//
//关闭数据库
//
function Close()
{
@mysql_close($this->linkID);
$this->isClose = true;
if(is_object($GLOBALS['dsql'])){ $GLOBALS['dsql']->isClose = true; }
$this->FreeResultAll();
}



//
//执行一个不返回结果的SQL语句，如update,delete,insert等
//
function ExecuteNoneQuery($sql="")
{
global $dsql;
if($dsql->isClose){
$this->Open(false);
$dsql->isClose = false;
}
if($sql!="") $this->SetQuery($sql);
if(is_array($this->parameters)){
foreach($this->parameters as $key=>$value){
$this->queryString = str_replace("@".$key,"'$value'",$this->queryString);
}
}
return mysql_query($this->queryString,$this->linkID);
}
//
//执行一个返回影响记录条数的SQL语句，如update,delete,insert等
//
function ExecuteNoneQuery2($sql="")
{
global $dsql;
if($dsql->isClose){
$this->Open(false);
$dsql->isClose = false;
}
if($sql!="") $this->SetQuery($sql);
if(is_array($this->parameters)){
foreach($this->parameters as $key=>$value){
$this->queryString = str_replace("@".$key,"'$value'",$this->queryString);
}
}
mysql_query($this->queryString,$this->linkID);
return mysql_affected_rows($this->linkID);
}
function ExecNoneQuery($sql="")
{
return $this->ExecuteNoneQuery($sql);
}
//
//执行一个带返回结果的SQL语句，如SELECT，SHOW等
//
function Execute($id="me",$sql="")
{
global $dsql;
if($dsql->isClose){
$this->Open(false);
$dsql->isClose = false;
}
if($sql!="") $this->SetQuery($sql);
$this->result[$id] = @mysql_query($this->queryString,$this->linkID);
if(!$this->result[$id]){
$this->DisplayError(mysql_error()." - Execute Query False! ".$this->queryString."");
}
}
function Query($id="me",$sql="")
{
$this->Execute($id,$sql);
}
//
//执行一个SQL语句,返回前一条记录或仅返回一条记录
//
function GetOne($sql="",$acctype=MYSQL_BOTH)
{
global $dsql;
if($dsql->isClose){
$this->Open(false);
$dsql->isClose = false;
}
if($sql!=""){
if(!eregi("limit",$sql)) $this->SetQuery(eregi_replace("[,;]$","",trim($sql))." limit 0,1;");
else $this->SetQuery($sql);
}
$this->Execute("one");
$arr = $this->GetArray("one",$acctype);
if(!is_array($arr)) return("");
else { @mysql_free_result($this->result["one"]); return($arr);}