复制代码 代码如下:

using System;

using System.Collections;

using System.Configuration;

using System.Data;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.HtmlControls;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Data.SqlClient;

using Common;

using DataAccess;

public partial class Controls_ProductType2 : System.Web.UI.UserControl

{

ProductType productType = new ProductType();

Product product = new Product();

protected void TreeView_TreeNodePopulate(object sender, TreeNodeEventArgs e)

{

if (e.Node.ChildNodes.Count == 0)

{

switch (e.Node.Depth)

{

case 0:

PopulateCategories(e.Node);

break;

case 1:

PopulateProductType(e.Node);

break;

case 2:

PopulateProducts(e.Node);

break;

}

}

// int i = TreeToXml.TreeToXML(TreeView1, "D:/TreeToXML.xml");

}

protected void Page_Load(object sender, EventArgs e)

{

}

//第一级节点（parentID=0）

void PopulateCategories(TreeNode node)

{

DataTable dt = new DataTable();

dt = productType.GetListByFatherNode();

if (dt.Rows.Count > 0)

{

foreach (DataRow row in dt.Rows)

{

TreeNode NewNode = new TreeNode(row["ProductTypeName"].ToString(), row["ProductTypeID"].ToString(),"","../WebProductList.aspx?productTypeIdOne="+ row["ProductTypeID"].ToString() +"","");

NewNode.PopulateOnDemand = true;

NewNode.SelectAction = TreeNodeSelectAction.Expand;

node.ChildNodes.Add(NewNode);

node.Expanded = true ;

}

}

}

//第二级节点

void PopulateProductType(TreeNode node)

{

DataTable dt = new DataTable();

QueryParam queryparam = new QueryParam();

queryparam.Add("ParentID", QueryParam.RELATION.EQ, "" + node.Value + "");

dt = productType.GetListByBranchNode(queryparam);

if (dt.Rows.Count > 0)

{

foreach (DataRow row in dt.Rows)

{

TreeNode NewNode = new TreeNode(row["ProductTypeName"].ToString(), row["ProductTypeID"].ToString(), "", "../WebProductList.aspx?productTypeIdTwo=" + row["ProductTypeID"].ToString() + "", "");

NewNode.PopulateOnDemand = true;

NewNode.SelectAction = TreeNodeSelectAction.Expand;

node.ChildNodes.Add(NewNode);

node.Expanded = false ;

}

}

}

//第三个节点

void PopulateProducts(TreeNode node)

{

DataTable dt = new DataTable();

QueryParam queryparam = new QueryParam();

queryparam.Add("ProductTypeItemID", QueryParam.RELATION.EQ, "" + node.Value + "");

dt = product.GetList(queryparam);

if (dt.Rows.Count > 0)

{

foreach (DataRow row in dt.Rows)

{

TreeNode NewNode = new TreeNode(row["ProductName"].ToString(), row["ProductID"].ToString(), "", "../WebProductDetaile.aspx?productID=" + row["ProductID"].ToString() + "", "");

//NewNode.PopulateOnDemand = false;

//NewNode.SelectAction = TreeNodeSelectAction.None;

NewNode.PopulateOnDemand =true ;

NewNode.SelectAction = TreeNodeSelectAction.Expand ;

node.ChildNodes.Add(NewNode);

node.Expanded = false;

}

}

}

}