从数据库中提出数据，实现图片上一页、下一页的翻页功能，请问一下“获取链接和command部分怎么写？”

Posted 2023-04-14

数据库结构：
id Photourl
1 10061122222.jpg
2 10061122222.jpg
3 10061122222.jpg
4 10061122222.jpg
....
实现功能模拟画面：
共66张图片， 上一张 下一张

//服务器端
public string GetPhotoUrl(string sql)
//获取链接和command怎么写？
cmd.CommandText=sql;
IDataReader dr = cmd.ExecuteReader();
if(dr.Read())
return String.Format("0,1",dr[0],dr[1]);

else
return null;




public string GetNextPhotoUrl(string id)
string sql = "select top 1 id,PhotoUrl from 表名 where id>" + id;
return GetPhotoUrl(sql);


public string GetPreviousPhotoUrl(string id)
string sql = "select top 1 id,PhotoUrl from 表名 where id<" + id + " order by id desc";
return GetPhotoUrl(sql);

请写代码，不要给思路！不胜感激！
前题是在vs2008中asp.net web应用程序中语言使用c#。

参考技术A 用ajax工具包中的SlideShowExtender 控件，直接可以实现追问

麻烦看清问题再回答！谢谢！

参考技术B 上翻页和下翻页的时候，将答题的信息存入session或者request中，这样在后台可以获得追问

麻烦看清问题再回答！谢谢！

DEDEcms手机网站添加详情内页上一页/下一页的翻页功能

修改文件include/arc.archives.class.php文件。

1、搜索

function GetPreNext($gtype=‘‘)

2、将这个函数的所有内容替换为

    function GetPreNext($gtype=‘‘)
    {
        $rs = ‘‘;
        if(count($this->PreNext)<2)
        {
            $aid = $this->ArcID;
            $preR =  $this->dsql->GetOne("Select id From `#@__arctiny` where id<$aid And arcrank>-1 And typeid=‘{$this->Fields[‘typeid‘]}‘ order by id desc");
            $nextR = $this->dsql->GetOne("Select id From `#@__arctiny` where id>$aid And arcrank>-1 And typeid=‘{$this->Fields[‘typeid‘]}‘ order by id asc");
            $next = (is_array($nextR) ? " where arc.id={$nextR[‘id‘]} " : ‘ where 1>2 ‘);
            $pre = (is_array($preR) ? " where arc.id={$preR[‘id‘]} " : ‘ where 1>2 ‘);
            $query = "Select arc.id,arc.title,arc.shorttitle,arc.typeid,arc.ismake,arc.senddate,arc.arcrank,arc.money,arc.filename,arc.litpic,
                        t.typedir,t.typename,t.namerule,t.namerule2,t.ispart,t.moresite,t.siteurl,t.sitepath
                        from `#@__archives` arc left join #@__arctype t on arc.typeid=t.id  ";
            $nextRow = $this->dsql->GetOne($query.$next);
            $preRow = $this->dsql->GetOne($query.$pre);
            
            
            
    
            if(is_array($preRow))
            {
                $mlink = GetFileUrl($preRow[‘id‘],$preRow[‘typeid‘],$preRow[‘senddate‘],$preRow[‘title‘],$preRow[‘ismake‘],$preRow[‘arcrank‘],
                $preRow[‘namerule‘],$preRow[‘typedir‘],$preRow[‘money‘],$preRow[‘filename‘],$preRow[‘moresite‘],$preRow[‘siteurl‘],$preRow[‘sitepath‘]);
                $mobile_mlink = "/m/view.php?aid=".$preRow[‘id‘];
                $this->PreNext[‘pre‘] = "上一篇：<a href=‘$mlink‘>{$preRow[‘title‘]}</a> ";
                $this->PreNext[‘mobile_pre‘] = "上一篇：<a href=‘$mobile_mlink‘>{$preRow[‘title‘]}</a> ";
                $this->PreNext[‘preimg‘] = "<a href=‘$mlink‘><img src=\"{$preRow[‘litpic‘]}\" alt=\"{$preRow[‘title‘]}\"/></a> "; 
            }
            else
            {
                $this->PreNext[‘pre‘] = "上一篇：没有了 ";
                $this->PreNext[‘mobile_pre‘] = "上一篇：没有了 ";
                $this->PreNext[‘preimg‘] ="<img src=\"/templets/default/images/nophoto.jpg\" alt=\"对不起，没有上一图集了！\"/>";
            }
            if(is_array($nextRow))
            {
                $mlink = GetFileUrl($nextRow[‘id‘],$nextRow[‘typeid‘],$nextRow[‘senddate‘],$nextRow[‘title‘],$nextRow[‘ismake‘],$nextRow[‘arcrank‘],
                $nextRow[‘namerule‘],$nextRow[‘typedir‘],$nextRow[‘money‘],$nextRow[‘filename‘],$nextRow[‘moresite‘],$nextRow[‘siteurl‘],$nextRow[‘sitepath‘]);                
                $mobile_mlink = "/m/view.php?aid=".$nextRow[‘id‘];
                $this->PreNext[‘next‘] = "下一篇：<a href=‘$mlink‘>{$nextRow[‘title‘]}</a> ";
                $this->PreNext[‘mobile_next‘] = "下一篇：<a href=‘$mobile_mlink‘>{$nextRow[‘title‘]}</a> ";
                $this->PreNext[‘nextimg‘] = "<a href=‘$mlink‘><img src=\"{$nextRow[‘litpic‘]}\" alt=\"{$nextRow[‘title‘]}\"/></a> ";
            }
            else
            {
                $this->PreNext[‘next‘] = "下一篇：没有了 ";
                $this->PreNext[‘mobile_next‘] = "下一篇：没有了 ";
                $this->PreNext[‘nextimg‘] ="<a href=‘javascript:void(0)‘ alt=\"\"><img src=\"/templets/default/images/nophoto.jpg\" alt=\"对不起，没有下一图集了！\"/></a>";
            }
        }
        if($gtype==‘pre‘)
        {
            $rs =  $this->PreNext[‘pre‘];
        }
        else if($gtype==‘preimg‘){
            
            $rs =  $this->PreNext[‘preimg‘];
        }        
        else if($gtype==‘mobile_pre‘){
            
            $rs =  $this->PreNext[‘mobile_pre‘];
        }
        else if($gtype==‘next‘)
        {
            $rs =  $this->PreNext[‘next‘];
        }        
        else if($gtype==‘mobile_next‘)
        {
            $rs =  $this->PreNext[‘mobile_next‘];
        }
        else if($gtype==‘nextimg‘){
            
            $rs =  $this->PreNext[‘nextimg‘];
        }
        else
        {
            $rs =  $this->PreNext[‘pre‘]." &nbsp; ".$this->PreNext[‘next‘];
        }
        return $rs;
    }

3、在手机网站详情页模板内，将调用上一页、下一页标签插入。

    <ul class="am-pagination blog-pagination">

      <li>{dede:prenext get=‘mobile_pre‘/}</li>
      <div style="clear:both;"></div>
      <li>{dede:prenext get=‘mobile_next‘/}</li>

    </ul>

 

大功告成，详细攻略请移步网站，重庆老农民