解决此问题，只须修改dede/stepselect_main.php的相关内容就可以了。


首先在空间里找到dede/stepselect_main.php 这个文件，然后找到其中的这段代码：

• else if($action=='addenum_save')
  
• {
  
• if(empty($ename) || empty($egroup))
  
• {
  
• Showmsg("类别名称或组名称不能为空！","-1");
  
• exit();
  
• }
  
• if($issign == 1 || $topvalue == 0)
  
• {
  
• $enames = explode(',', $ename);
  
• foreach($enames as $ename)
  
• {
  
• $arr = $dsql->GetOne("SELECT * FROM `#@__sys_enum` WHERE egroup='$egroup' AND (evalue MOD 500)=0 ORDER BY disorder DESC ");
  
• if(!is_array($arr)) $disorder = $evalue = ($issign==1 ? 1 : 500);
  
• else $disorder = $evalue = $arr['disorder'] + ($issign==1 ? 1 : 500);
  
• 
  
• $dsql->ExecuteNoneQuery("INSERT INTO `#@__sys_enum`(`ename`,`evalue`,`egroup`,`disorder`,`issign`)
  
• VALUES('$ename','$evalue','$egroup','$disorder','$issign'); ");
  
• }
  
• WriteEnumsCache($egroup);
  
• ShowMsg("成功添加枚举分类！".$dsql->GetError(), $ENV_GOBACK_URL);
  
• exit();
  
• } else if ($issign == 3 && $topvalue != 0)
  
• {
  
• $minid = $topvalue;
  
• $maxnum = 500; // 三级子类最多500个
  
• $enames = explode(',', $ename);
  
• foreach ($enames as $ename)
  
• {
  
• $arr = $dsql->GetOne("SELECT * FROM `#@__sys_enum` WHERE egroup='$egroup' AND evalue LIKE '$topvalue.%%%' ORDER BY evalue DESC ");
  
• if(!is_array($arr))
  
• {
  
• $disorder = $minid;
  
• $evalue = $minid.'.001';
  
• }
  
• else
  
• {
  
• $disorder = $minid;
  
• preg_match("#([0-9]{1,})\.([0-9]{1,})#", $arr['evalue'], $matchs);
  
• $addvalue = $matchs[2] + 1;
  
• $addvalue = sprintf("d", $addvalue);
  
• $evalue = $matchs[1].'.'.$addvalue;
  
• }
  
• $sql = "INSERT INTO `#@__sys_enum`(`ename`,`evalue`,`egroup`,`disorder`,`issign`)
  
• VALUES('$ename','$evalue','$egroup','$disorder','$issign'); ";
  
• // echo $sql;exit;
  
• $dsql->ExecuteNoneQuery($sql);
  
• }
  
• // echo $minid;
  
• WriteEnumsCache($egroup);
  
• ShowMsg("成功添加枚举分类！".$issign, $ENV_GOBACK_URL);
  
• exit();
  
• } else {
  
• $minid = $topvalue;
  
• $maxid = $topvalue + 500;
  
• $enames = explode(',', $ename);
  
• foreach($enames as $ename)
  
• {
  
• $arr = $dsql->GetOne(&#34;Select * From `dede_sys_enum` where egroup='$egroup' And evalue>$minid And evalue<$maxid order by evalue desc &#34;);
  
• if(!is_array($arr))
  
• {
  
• $disorder = $evalue = $minid+1;
  
• }
  
• else
  
• {
  
• $disorder = $arr['disorder']+1;
  
• $evalue = (int)($arr['evalue']+1);
  
• }
  
• $dsql->ExecuteNoneQuery(&#34;Insert into `dede_sys_enum`(`ename`,`evalue`,`egroup`,`disorder`,`issign`)
  
• values('$ename','$evalue','$egroup','$disorder','$issign'); &#34;);
  
• }
  
• WriteEnumsCache($egroup);
  
• ShowMsg(&#34;成功添加枚举分类！&#34;.$issign, $ENV_GOBACK_URL);
  
• exit();
  
• }
  
• }
  
• 2.dede/templets/stepselect_main.htm
  找到
  if($topvalue % 500 != 0) $arr['issign'] =2;
  修改为
  if($topvalue % 500 != 0) $arr['issign'] =3;
  if($topvalue % 500 == 0) $arr['issign'] =2;
  以上这样修改后1,2,3联动能添加，再4级就不行了。应为这里的标记只判断到3，织梦也最多能添加3级联动。所以足够用了。
  
  以经改好了代码 大家可以下载 解决dedecms5.7后台不能添加联动二级的bug
  

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