dede:sql实现分页，织梦sql实现分页的办法

思路是把dede:list标签进行改造, 列表页专用标签的工作原理大致是先通过栏目变量id获取到对应的数据源再呈现到页面上来，那么 就可以让它不仅仅通过栏目变量id还可以通过指定的sql语句来获取数据源 可以另外嵌入一个类似{dede:listsql sql='select * from wp_posts' pagesize='10'}的标签来使用。 

打开include/arc.listview.class.php这个文件

找到： 

if ( ! is_object ( $ctag ) ) { $ctag = $this -> dtp -> GetTag ( "list" ) ; }

这一段，在其后添加如下代码：

if(!is_object($ctag))
{
$ctag = $this->dtp->GetTag("listsql");
if (is_object($ctag))
{
$cquery = $ctag->GetAtt("sql");
$cquery = preg_replace("/SELECT(.*?)FROM/is", " SELECT count(*) as dd FROM ", $cquery);
$cquery = preg_replace("/ORDER(.*?)SC/is", "", $cquery);
$row = $this->dsql->GetOne($cquery);
if(is_array($row))
{
$this->TotalResult = $row['dd'];
}
else
{
$this->TotalResult = 0;
}
}
}
然后找到：
if($ctag->GetName()=="list")
{
$limitstart = ($this->PageNo-1) * $this->PageSize;
$row = $this->PageSize;
if(trim($ctag->GetInnerText())=="")
{
$InnerText = GetSysTemplets("list_fulllist.htm");
}
else
{
$InnerText = trim($ctag->GetInnerText());
}
$this->dtp->Assign($tagid,
$this->GetArcList(
$limitstart,
$row,
$ctag->GetAtt("col"),
$ctag->GetAtt("titlelen"),
$ctag->GetAtt("infolen"),
$ctag->GetAtt("imgwidth"),
$ctag->GetAtt("imgheight"),
$ctag->GetAtt("listtype"),
$ctag->GetAtt("orderby"),
$InnerText,
$ctag->GetAtt("tablewidth"),
$ismake,
$ctag->GetAtt("orderway")
)
);
}
这一段，在其后添加如下代码：
else if($ctag->GetName()=="listsql")
{
$limitstart = ($this->PageNo-1) * $this->PageSize;
$row = $this->PageSize;
if(trim($ctag->GetInnerText())=="")
{
$InnerText = GetSysTemplets("list_fulllist.htm");
}
else
{
$InnerText = trim($ctag->GetInnerText());
}
$this->dtp->Assign($tagid,
$this->GetSqlList(
$limitstart,
$row,
$ctag->GetAtt("sql"),
$InnerText
)
);
}
最后找到function GetArcList这个方法，在其后添加一个可以通过传入sql参数获取指定数据源的方法，代码如下：

function GetSqlList($limitstart = 0, $row = 10, $sql = '', $innertext){

global $cfg_list_son;
$innertext = trim($innertext);

if ($innertext == '') {
$innertext = GetSysTemplets('list_fulllist.htm');
}
//处理SQL语句
$limitStr = " LIMIT {$limitstart},{$row}";

$this->dsql->SetQuery($sql . $limitStr);
$this->dsql->Execute('al');
$t2 = ExecTime();

//echo $t2-$t1;
$sqllist = '';
$this->dtp2->LoadSource($innertext);
$GLOBALS['autoindex'] = 0;

//获取字段
while($row = $this->dsql->GetArray("al")) {

$GLOBALS['autoindex']++;

if(is_array($this->dtp2->CTags))
{
foreach($this->dtp2->CTags as $k=>$ctag)
{
if($ctag->GetName()=='array')
{
//传递整个数组，在runphp模式中有特殊作用
$this->dtp2->Assign($k,$row);
}
else
{
if(isset($row[$ctag->GetName()]))
{
$this->dtp2->Assign($k,$row[$ctag->GetName()]);
}
else
{
$this->dtp2->Assign($k,'');
}
}
}
}

$sqllist .= $this->dtp2->GetResult();

}//while

$t3 = ExecTime();
//echo ($t3-$t2);
$this->dsql->FreeResult('al');

return $sqllist;
}
总共就添加三段代码,调用范例：
{dede:listsql sql='select ID,post_title from wp_posts' pagesize='10'}
<li><a href=http://www.dede58.com/"http:/www.genban.org/[field:ID /].html">[field:post_title /]</a></li>
{/dede:listsql}
<!--分页-->
{dede:pagelist listsize='2' listitem='index pre pageno next end '/}