关于递归组织HTML的问题

[海の云]

我想实现一个效果是这样的
<ul>
<li><a href="#">××集团</a></li>
<li><a href="#">董事长室</a></li>

<li><a href="#">总经理室</a></li>
<li class="open"><a href="#">行政中心</a>
<!--Second Menu Begin-->
<ul>
<li><a href="#">信息部</a></li>
<li><a href="#">党委工会</a></li>
<li class="open"><a href="#">人事行政部</a>

<!--Third Menu Begin-->
<ul>
<li><a href="#">人力资源科</a></li>
<li><a href="#">行政科</a></li>
</ul>
<!--Third Menu End-->
</li>
<li><a href="#">财务部</a></li>

<li><a href="#">物流采购部</a></li>
<li><a href="#">企业管理部</a></li>
</ul>
<!--Second Menu End-->
</li>
</ul>


我后台写的代码是这样
protected string DoRecursiveHTML(DataSet ds, string nodeID)
{
//StringBuilder sb = new StringBuilder();

DataView dv = ds.Tables[0].DefaultView;
dv.RowFilter = " ParentID = '" + nodeID + "'";

//TreeView1.no
//sb.Append("<ul>");
string retStr = "<ul>";
foreach (DataRowView row in dv)
{
//sb.AppendFormat("<li><a href=\"javascript:alert('{0}')\">{1}</a>{2}</li>", row["NodeID"].ToString(), row["NodeName"].ToString(), DoRecursiveHTML(ds, row["NodeID"].ToString()));
retStr = retStr + "<li><a href=\"javascript:alert('";
retStr = retStr + row["NodeID"].ToString();
retStr = retStr + "')\">";
retStr = retStr + row["NodeName"].ToString();
retStr = retStr + "</a>";
retStr = retStr + DoRecursiveHTML(ds, row["NodeID"].ToString());
retStr = retStr + "</li>";
}

retStr = retStr + "/<ul>";

//return sb.ToString();
return retStr;
}

但是这个递归不起作用 不知道问题出在哪里

[kkbac]

错误是什么>

[海の云]

错误是没有产生正确的递归效果

[W346119044]

打酱油……

[孟子E章]

 protected string DoRecursiveHTML(DataSet ds, string nodeID)
  {
    //StringBuilder sb = new StringBuilder();

    DataView dv = ds.Tables[0].DefaultView;
    dv.RowFilter = " ParentID = " + nodeID;

    if (dv.Count > 0)
    {
      string retStr = "<ul>";
      foreach (DataRowView row in dv)
      {
        retStr = retStr + "<li><a href=\"javascript:alert('";
        retStr = retStr + row["NodeID"].ToString();
        retStr = retStr + "')\">";
        retStr = retStr + row["NodeName"].ToString();
        retStr = retStr + "</a>";
        retStr = retStr + DoRecursiveHTML(ds, row["NodeID"].ToString());
        retStr = retStr + "</li>";
      }
      retStr = retStr + "</ul>";
      return retStr;
    }
    else
    {
      return "";
    }
  }

[孟子E章]

调用方法
String html = DoRecursiveHTML(ds, "0"); //0表示第一级节点的parentID
Response.Write(html);

[孟子E章]

如果ParentID 是字符串格式的，需要调整下面的过滤条件

dv.RowFilter = " ParentID = '" + nodeID + "'";