這篇文章主要講解了“如何使用ASP.NET中TreeView”,文中的講解內(nèi)容簡(jiǎn)單清晰,易于學(xué)習(xí)與理解,下面請(qǐng)大家跟著小編的思路慢慢深入,一起來(lái)研究和學(xué)習(xí)“如何使用ASP.NET中TreeView”吧!
復(fù)制代碼 代碼如下:
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)
{
}
//第一級(jí)節(jié)點(diǎn)(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 ;
}
}
}
//第二級(jí)節(jié)點(diǎn)
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 ;
}
}
}
//第三個(gè)節(jié)點(diǎn)
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;
}
}
}
}
感謝各位的閱讀,以上就是“如何使用ASP.NET中TreeView”的內(nèi)容了,經(jīng)過(guò)本文的學(xué)習(xí)后,相信大家對(duì)如何使用ASP.NET中TreeView這一問(wèn)題有了更深刻的體會(huì),具體使用情況還需要大家實(shí)踐驗(yàn)證。這里是創(chuàng)新互聯(lián)網(wǎng)站建設(shè)公司,,小編將為大家推送更多相關(guān)知識(shí)點(diǎn)的文章,歡迎關(guān)注!
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