ASP.NET TreeView 递归绑定数据

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DAL方法，BLL省略

publicstaticList<SysFun>GetSysFunByParentNodeId(intparentNodeid)
{
List<SysFun>listSysFun=newList<SysFun>();
stringsql="SELECT*FROM[MYBOOKSHOP].[dbo].[SysFun]WHEREParentNodeId=@parentNodeid";
SqlParameter[]par=
{
newSqlParameter("@parentNodeid",parentNodeid)
};
using(SqlDataReadersqlReader=DBHelper.GetReader(sql,CommandType.Text,par))
{
while(sqlReader.Read())
{
SysFunsysFun=newSysFun();
sysFun.NodeId=(int)sqlReader["NodeId"];
sysFun.DisplayName=sqlReader["DisplayName"].ToString();
sysFun.ParentNodeId=(int)sqlReader["ParentNodeid"];
listSysFun.Add(sysFun);
}
}
returnlistSysFun;
}

publicstaticList<SysFun>GetSysFun(intparentNodeid)
{
List<SysFun>listSysFun=newList<SysFun>();
stringsql="SELECT*FROM[MYBOOKSHOP].[dbo].[SysFun]WHEREParentNodeid=@parentNodeid";
SqlParameter[]par=
{
newSqlParameter("@parentNodeid",parentNodeid)
};
using(SqlDataReadersqlReader=DBHelper.GetReader(sql,CommandType.Text,par))
{
while(sqlReader.Read())
{
SysFunsysFun=newSysFun();
sysFun.NodeId=(int)sqlReader["NodeId"];
sysFun.DisplayName=sqlReader["DisplayName"].ToString();
sysFun.ParentNodeId=(int)sqlReader["ParentNodeid"];
listSysFun.Add(sysFun);
}
}
returnlistSysFun;
}

页面后台代码：

protectedvoidPage_Load(objectsender,EventArgse)
{
if(!Page.IsPostBack)
{
TVSysFun.ExpandDepth=0;
BindTreeView();
}

}
privatevoidBindTreeView()
{

List<SysFun>list=BookManager.GetSysFun(0);
//遍历父节点
foreach(SysFunparentNodeinlist)
{
TreeNodepNode=newTreeNode();
pNode.Value=parentNode.NodeId.ToString();
pNode.Text=parentNode.DisplayName.ToString();

//遍历父节点下的子节点
List<SysFun>childNode=BookManager.GetSysFunByParentNodeId(Convert.ToInt32(parentNode.NodeId));
foreach(SysFuncNodeinchildNode)
{
TreeNodenode=newTreeNode();
node.Value=cNode.NodeId.ToString();
node.Text=cNode.DisplayName.ToString();
pNode.ChildNodes.Add(node);
}
TVSysFun.Nodes.Add(pNode);
}
}