我们在制作织梦模板时，通常都有“关于我们”，“新闻中心”等栏目，要每个栏目都可以显示不同的图片就按照下面的方法修改，实现每个栏目都有上传栏目缩略图的功能。
第一步：执行SQL命令为数据库的栏目表结构添加一个字段
alter table `dede_arctype` add `typeimg` varchar(200) NOT NULL default ;
第二步：修改涉及到文件：
dede/catalog_add.php
dede/catalog_edit.php
dede/templets/catalog_add.htm
dede/templets/catalog_edit.htm
include/taglib/channel.lib.php
1、打开dede/catalog_add.php文件，并查找
$queryTemplate = “insert into `dede_arctype`
将
(reid,topid,sortrank,typename,typedir,
替换为：
(reid,topid,sortrank,typename,typedir,typeimg,
将
(‘~reid~’,'~topid~’,'~rank~’,'~typename~’,'~typedir~’,
替换为：
(‘~reid~’,'~topid~’,'~rank~’,'~typename~’,'~typedir~’,'~typeimg~’,
查找
$in_query = “INSERT INTO `dede_arctype`
将
(reid,topid,sortrank,typename,typedir,
替换为：
(reid,topid,sortrank,typename,typedir,typeimg,
将
(‘$reid’,'$topid’,'$sortrank’,'$typename’,'$typedir’,
替换为：
(‘$reid’,'$topid’,'$sortrank’,'$typename’,'$typedir’,'$typeimg’,
保存catalog_add.php。
2、打开dede/catalog_edit.php文件，并查找
$upquery = “Update `dede_arctype` set
在 typedir=’$typedir’, 其下面增加一行：
`typeimg`=’$typeimg’,
保存catalog_edit.php。
3、打开dede/templets/catalog_add.htm文件
在最上面找到这段代码
<title>栏目管理</title>
<link href=”css/base.css” rel=”stylesheet” type=”text/css”>
替换为:
<title>栏目管理</title>
<link href=”css/base.css” rel=”stylesheet” type=”text/css”>
<script language=”javascript” src=”../include/js/dedeajax2.js”></script>
<script language=’javascript’ src=”js/main.js”></script>
<script type=”text/javascript” src=”js/calendar/calendar.js”></script>
查找
<tr>
<td height="26" style="padding-left:10px;">列表命名规则：</td>
<td>
<input name="namerule2" type="text" id="namerule2" value="{typedir}/list_{tid}_{page}.html" class="pubinputs" style="width:250px" />
<img src="images/help.gif" alt="帮助" width="16" height="16" border="0" style="cursor:pointer" onClick="ShowHide('helpvar3')"/>
</td>
</tr>
在标签下面增加一行：
<!--增加栏目缩略图-->
<tr>
<td width="90" style="padding-left:10px;">栏目图片：</td>
<td width="560">
<table width="100%" border="0" cellspacing="1" cellpadding="1">
<tr>
<td height="30">
<input name="typeimg" type="text" id="typeimg" style="width:240px" />
<input type="button" value="本地上传" style="width:70px;cursor:pointer;display:none" />
<iframe name='uplitpicfra' id='uplitpicfra' src='' style='display:none'></iframe>
<span class="litpic_span"><input name="litpic" type="file" id="litpic" onChange="SeePicNew(this, 'divpicview', 'uplitpicfra', 165, 'archives_add.php');" size="1" class='np coolbg'/></span>
<input type="button" name="Submit2" value="选择图片" style="margin-left:8px;" onClick="SelectImage('form1.typeimg','small');" class='np coolbg'/>
<input type="button" name="Submit2" value="裁剪" style="margin-left:8px;" onClick="imageCut('typeimg');" class='np coolbg'/>
<input type='checkbox' class='np' name='ddisremote' value='1' id='ddisremote'/>远程<br />(栏目模板里用{dede:field.typeimg /}调用
</td>
</tr>
</table>
</td>
<td width="150" align="center">
<div id='divpicview' class='divpre'></div>
</td>
</tr>
<!--增加栏目缩略图-->
保存catalog_add.htm。
4、打开dede/templets/catalog_edit.htm文件
在最上面找到这段代码
<title>栏目管理</title>
<link href=”css/base.css” rel=”stylesheet” type=”text/css”>
替换为:
<title>栏目管理</title>
<link href=”css/base.css” rel=”stylesheet” type=”text/css”>
<script language=”javascript” src=”../include/js/dedeajax2.js”></script>
<script language=”javascript” src=”js/main.js”></script>
<script type=”text/javascript” src=”js/calendar/calendar.js”></script>
查找
<tr>
<td height="26" style="padding-left:10px;">列表命名规则：</td>
<td>
<input name="namerule2" type="text" id="namerule2" value="<?php echo $myrow['namerule2']?>" size="40" class="iptxt" />
<img src="images/help.gif" alt="帮助" width="16" height="16" border="0" style="cursor:pointer" onClick="ShowHide('helpvar3')"/>
</td>
</tr>
在其下面增加一行：
<!--增加栏目缩略图-->
<tr>
<td width="90" height="81" style="padding-left:10px;">栏目图片：</td></td>
<td width="500">
<input name="typeimg" type="text" id="typeimg" style="width:300px" value="<?php echo $myrow['typeimg']?>"><input type="button" name="Submit" value="浏览..." style="width:70px" onClick="SelectImage('form1.typeimg','');">
<input type="button" name="Submit2" value="裁剪" style="margin-left:8px;" onClick="imageCut('typeimg');" class='np coolbg'/>
<input type='checkbox' class='np' name='ddisremote' value='1'>远程<br />(栏目模板里用{dede:field.typeimg /}调用)
</td>
<td align="center"><img src="<?php if($myrow['typeimg']!="") echo $myrow['typeimg']; else echo "images/pview.gif";?>" width="150" height="100" id="picview" name="picview"></td>
</tr>
<!--增加栏目缩略图-->
至此已经修改完成!
栏目图片的添加或修改图片时在 (栏目管理>高级选项)里面就会自动出现栏目图片添加的选择，点击选择图片，弹出窗口内选择浏览上传就OK。
注意：前台栏目标签调用的时候，还需要改一个文件，才能实现栏目图片显示，否则只能通过sql语句才能显示图片。
第三步：列表页缩略图的调用
打开：include/taglib/channel.lib.php
找到
if($type=='top')
{
$sql = "Select id,typename,typedir,isdefault,ispart,defaultname,namerule2,moresite,siteurl,sitepath,description
From `dede_arctype` where reid=0 And ishidden<>1 order by sortrank asc limit 0,$row";
}
else if($type=="son")
{
//if($_sys_globals['typeid']>0) $typeid = $_sys_globals['typeid'];
if($typeid==0) {
return '';
}
$sql = "Select id,typename,typedir,isdefault,ispart,defaultname,namerule2,moresite,siteurl,sitepath,description
From `dede_arctype` where reid='$typeid' And ishidden<>1 order by sortrank asc limit 0,$row";
}
else if($type=="self")
{
if($reid==0) {
return '';
}
$sql = "Select id,typename,typedir,isdefault,ispart,defaultname,namerule2,moresite,siteurl,sitepath,description
From `dede_arctype` where reid='$reid' And ishidden<>1 order by sortrank asc limit 0,$row";
}
替换成下面的：
if($type=='top')
{
$sql = "Select id,typename,typeimg,typedir,isdefault,ispart,defaultname,namerule2,moresite,siteurl,sitepath,description
From `dede_arctype` where reid=0 And ishidden<>1 order by sortrank asc limit 0,$row";
}
else if($type=="son")
{
//if($_sys_globals['typeid']>0) $typeid = $_sys_globals['typeid'];
if($typeid==0) {
return '';
}
$sql = "Select id,typename,typeimg,typedir,isdefault,ispart,defaultname,namerule2,moresite,siteurl,sitepath,description
From `dede_arctype` where reid='$typeid' And ishidden<>1 order by sortrank asc limit 0,$row";
}
else if($type=="self")
{
if($reid==0) {
return '';
}
$sql = "Select id,typename,typeimg,typedir,isdefault,ispart,defaultname,namerule2,moresite,siteurl,sitepath,description
From `dede_arctype` where reid='$reid' And ishidden<>1 order by sortrank asc limit 0,$row";
}
调用方法：
<img src=”[field:typeimg /]” />
第四步：文章内容页缩略图的调用查找
if($this->ChannelUnit->ChannelInfos['issystem']!=-1)
将
$query = “Select arc.*,tp.reid,tp.typedir,ch.addtable
from `dede_archives` arc
left join dede_arctype tp on tp.id=arc.typeid
left join dede_channeltype as ch on arc.channel = ch.id
where arc.id=’$aid’ “;
$this->Fields = $this->dsql->GetOne($query);
替换为：
$query = “Select arc.*,tp.reid,tp.typedir,tp.typeimg,ch.addtable
from `dede_archives` arc
left join dede_arctype tp on tp.id=arc.typeid
left join dede_channeltype as ch on arc.channel = ch.id
where arc.id=’$aid’ “;
$this->Fields = $this->dsql->GetOne($query);
保存文件即可。
