aspnet自定义控件Treeview基本用法

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

 }

}