aspnet自定义控件Treeview基本用法

最新推荐文章于 2025-08-18 15:41:59 发布

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最新推荐文章于 2025-08-18 15:41:59 发布

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文章标签： ui

原文链接：http://www.cnblogs.com/z_lb/archive/2011/10/24/2222865.html

本文详细介绍了如何在ASP.NET用户控件中实现组织树控件的自定义事件、属性和方法，包括属性如当前组织实体、已选组织列表、显示复选框等，以及事件如节点选择改变事件，还提供了递归绑定组织层级结构的代码实现。

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用户控件添加了自定义事件和属性

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

namespace AspNet.UserControl.Organization

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

 #region 属?性?

 public OrganizationEntity CurrentOrganizationEntity

get

 if (ViewState["CurrentOrganizationEntity"] != null)

 //ViewState["CurrentOrganizationEntity"] = new T_BD_OrganizationEntity();

 return (OrganizationEntity)ViewState["CurrentOrganizationEntity"];

 else

 //ViewState["CurrentOrganizationEntity"]

 if (this.TVOrganization.Nodes.Count > 0)

 OrganizationEntity entity=new OrganizationEntity();

 entity.OrganizationID = new Guid(this.TVOrganization.Nodes[0].Value);

 return entity;

 return null;

 set { ViewState["CurrentOrganizationEntity"] = value; }

 public List<string> SelectedOrganization

get

 if (ViewState["SelectedOrganization"] != null)

 return (List<string>)ViewState["SelectedOrganization"];

 if (ShowCheckbox)

 List<string> list = new List<string>();

 // string str = string.Empty;

 foreach (TreeNode item in this.TVOrganization.CheckedNodes)

 if (item.Checked)

 list.Add(item.Value);

 // str += item.Text+";";

 // Label1.Text = str;

 return list;

 return new List<string>();

 set { ViewState["SelectedOrganization"] = value; }

 public bool ShowCheckbox

get

 if (ViewState["ShowCheckbox"] != null)

 return (bool)ViewState["ShowCheckbox"];

 return false;

set

 ViewState["ShowCheckbox"] = value;

 #endregion 属?性?

 #region 事?件t

 public event EventHandler TreeSelectedNodeChangedEvent;//事?件t

 #endregion 事?件t

 protected void Page_Load(object sender, EventArgs e)

 if (!Page.IsPostBack)

  InitTree();

 #region 递Y归é绑ó定¨

 private void InitTree()

 TVOrganization.Nodes.Clear();

 if (this.ShowCheckbox)

 TVOrganization.ShowCheckBoxes = TreeNodeTypes.All;

 else

 TVOrganization.ShowCheckBoxes = TreeNodeTypes.None;

 //DataTable dt = GetTreeViewTable();

 OrganizationBLL OrganizationBLL = new  OrganizationBLL();

OrganizationSearchEntity searchEntity = new  OrganizationSearchEntity();

 searchEntity .StateID = 0;

 IList<OrganizationEntity> iList = OrganizationBLL.GetAllEntities(searchEntity );

 IList<OrganizationEntity> itemList = iList.Where(p => （p).OrganizationTypeID == 0).ToList<OrganizationEntity>();

 foreach (OrganizationEntity item in itemList)

 TreeNode node = new TreeNode();

 node.Text = item.OrganizationCName;

 node.Value = item.OrganizationID.ToString();

 TVOrganization.Nodes.Add(node);

 AddTreeNode(iList, node);

 private void AddTreeNode(IList<OrganizationEntity> list, TreeNode node)

 IList<OrganizationEntity> itemList = list.Where(t => ((OrganizationEntity)t).FatherOrganizationID.ToString() == node.Value).ToList<OrganizationEntity>();

 foreach (OrganizationEntity item in itemList)

 TreeNode childNode = new TreeNode();

 childNode.Text = item.OrganizationCName;

 childNode.Value = item.OrganizationID.ToString();

 //childNode.Expanded = false;

 node.ChildNodes.Add(childNode);

 AddTreeNode(list, childNode);

 #endregion 递Y归é绑ó定¨

 #region Treeview 事?件t

 protected void TVOrganization_SelectedNodeChanged(object sender, EventArgs e)

OrganizationEntity entity = new OrganizationEntity();

 entity.OrganizationID = new Guid(this.TVOrganization.SelectedNode.Value);

 this.CurrentOrganizationEntity = entity;

 if (TreeSelectedNodeChangedEvent != null)

 TreeSelectedNodeChangedEvent(this, e);

 #endregion Treeview 事?件t

 #region setCheck/uncheck

 public void SetCheck(List<string> listSource)

 SetUnCheckAll();

 //foreach (string itemStr in listSource)

//{

 foreach (TreeNode item in TVOrganization.Nodes)

 SetCheckSource(item, listSource);

 // if(item.Value==itemStr)

 //SetCheckbox(item, true);

//}

 public void SetUnCheckAll()

 foreach (TreeNode item in TVOrganization.Nodes)

 SetCheckbox(item, false);

 private void SetCheckbox(TreeNode node,bool check)

 node.Checked = check;

 foreach (TreeNode item in node.ChildNodes)

 item.Checked = check;

 if (item.ChildNodes.Count > 0)

 SetCheckbox(item, check);

 private void SetCheckSource(TreeNode node, List<string> listSource)

 foreach (var itemStr in listSource)

 if (node.Value == itemStr)

 node.Checked = true;

 break;

 foreach (TreeNode item in node.ChildNodes)

 foreach (var itemStr in listSource)

 if (item.Value == itemStr)

 item.Checked = true;

 break;

 if (item.ChildNodes.Count > 0)

 SetCheckSource(item, listSource);

 #endregion setCheck/uncheck

转载于:https://www.cnblogs.com/z_lb/archive/2011/10/24/2222865.html