/// <summary>
/// 初始化树信息
/// </summary>
private void InitTreeView()
{
  this.treeView1.Nodes.Clear();
  this.treeView1.BeginUpdate();
  List<DictTypeNodeInfo> typeNodeList = BLLFactory<DictType>.Instance.GetTree();
  foreach (DictTypeNodeInfo info in typeNodeList)
  {
    AddTree(null, info);
  }
  this.treeView1.EndUpdate();
  this.treeView1.ExpandAll();
}
/// <summary>
/// 根据节点数据，递归构建该层级以下的树节点
/// </summary>
/// <param name="pNode">父树节点</param>
/// <param name="info">字典类型数据</param>
private void AddTree(TreeNode pNode, DictTypeNodeInfo info)
{
  TreeNode node = null;
  if (info.PID == "-1")
  {
    node = new TreeNode(info.Name, 0, 0);
    node.Tag = info.ID;
    this.treeView1.Nodes.Add(node);
  }
  else
  {
    node = new TreeNode(info.Name, 1, 1);
    node.Tag = info.ID;
    pNode.Nodes.Add(node);
  }
  foreach (DictTypeNodeInfo subInfo in info.Children)
  {
    AddTree(node, subInfo);
  }
}

/// <summary>
/// 单击节点事件处理
/// </summary>
private void treeView1_AfterSelect(object sender, TreeViewEventArgs e)
{
  if (e.Node.Tag != null)
  {
    this.lblDictType.Text = e.Node.Text;
    this.lblDictType.Tag = e.Node.Tag;
    BindData();
  }
}

//添加显示列
this.tree.Columns.Add(new TreeListColumn{ FieldName= "Name", Caption= "字典类型名称", Width=160, VisibleIndex =0});
//设置树控件的层次关系及属性
tree.KeyFieldName = "ID";
tree.ParentFieldName = "PID";
this.tree.OptionsBehavior.Editable = false;
this.tree.OptionsView.EnableAppearanceOddRow = true;
this.tree.OptionsView.EnableAppearanceEvenRow = true;

//控件扩展函数封装处理
this.tree.CreateColumn("Name", "字典类型名称", 160, true);
this.tree.InitTree("ID", "PID", "-1", false, false);

/// <summary>
/// 绑定树的数据源
/// </summary>
private void BindTree()
{
  this.tree.DataSource = BLLFactory<DictType>.Instance.GetAll();
  this.tree.ExpandAll();
}

//设置树的图标集合及逐级图标
this.tree.SelectImageList = this.imageCollection1;
this.tree.CustomDrawNodeImages += (object sender, CustomDrawNodeImagesEventArgs e)=>
{
  int maxCount = this.imageCollection1.Images.Count;
  var index = e.Node.Level < maxCount ? e.Node.Level : 0;
  e.SelectImageIndex = index;
};

//初始化树节点选择事件
  this.tree.FocusedNodeChanged += delegate(object sender, FocusedNodeChangedEventArgs e)
  {
    this.FocusedNodeChanged();
  };
}
private void FocusedNodeChanged()
{
  if (this.tree.FocusedNode != null)
  {
    var PID = string.Concat(this.tree.FocusedNode.GetValue("ID"));
    treeConditionSql = string.Format("DictType_ID = '{0}'", PID);
  }
  else
  {
    treeConditionSql = "";
  }
  BindData();
}

private void InitTree()
{
  this.tree.Columns.Clear();
  //控件扩展函数封装处理
  this.tree.CreateColumn("Name", "字典类型名称", 160, true);
  this.tree.InitTree("ID", "PID", "-1", false, false);
  //设置树的图标集合及逐级图标
  this.tree.SelectImageList = this.imageCollection1;
  this.tree.CustomDrawNodeImages += (object sender, CustomDrawNodeImagesEventArgs e)=>
  {
    int maxCount = this.imageCollection1.Images.Count;
    var index = e.Node.Level < maxCount ? e.Node.Level : 0;
    e.SelectImageIndex = index;
  };
}

/// <summary>
/// 实现树节点的过滤查询
/// </summary>
private void InitSearchControl()
{
  this.searchControl1.Client = this.tree;
  this.tree.FilterNode += (object sender, DevExpress.XtraTreeList.FilterNodeEventArgs e) =>
  {
    if (tree.DataSource == null)
      return;
    string nodeText = e.Node.GetDisplayText("Name");//参数填写FieldName 
    if (string.IsNullOrWhiteSpace(nodeText))
      return;
    bool isExist = nodeText.IndexOf(searchControl1.Text, StringComparison.OrdinalIgnoreCase) >= 0;
    if (isExist)
    {
      var node = e.Node.ParentNode;
      while (node != null)
      {
        if (!node.Visible)
        {
          node.Visible = true;
          node = node.ParentNode;
        }
        else
          break;
      }
    }
    e.Node.Visible = isExist;
    e.Handled = true;
  };
}