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C# treeview数据绑定

互联网 diligentman 2天前 8次浏览

动态加载数据代码,采用递归的方式遍历节点: 


   private void Form_Load(object sender, EventArgs e)
   {      
       //加载数据,把数据加载到控件treeview1中   
       setTreeView(treeView1, 0);           
   }
 
     //调用的时候parentId以0值开始 setTreeView(treeView1, 0);
     private void setTreeView(TreeView tr1, int parentId)
    {
    string sql = "select * from TreeTest where parentId=" + parentId;
        DataTable ds = sqlHelper.ExecuteDataTable(sql);
         if (ds.Rows.Count > 0)
          {
                 int pId = -1;
              foreach (DataRow row in ds.Rows)
                 {
                      TreeNode node = new TreeNode();
                      node.Text = row["nodeName"].ToString();
                      node.Tag = (int) row["id"];
                      pId = (int) row["parentId"];
                     if (pId == 0)
                      {
                          //添加根节点
                          tr1.Nodes.Add(node);
                      }
                      else
                      {
                          //添加根节点之外的其他节点
                          RefreshChildNode(tr1, node, pId);
                      }
                      //查找以node为父节点的子节点
                      setTreeView(tr1, (int)node.Tag);
 
                  }
             }
 
     }
  //处理根节点的子节点
    private void RefreshChildNode(TreeView tr1, TreeNode treeNode, int parentId)
   {
               foreach (TreeNode node in tr1.Nodes)
                      {
                          if ((int)node.Tag == parentId)
                             {
                                 node.Nodes.Add(treeNode);
                                  return;
                              }else if (node.Nodes.Count > 0)
                              {
                                  FindChildNode(node, treeNode, parentId);
                             }
                      }
       }
 
    //处理根节点的子节点的子节点
    private void FindChildNode(TreeNode tNode, TreeNode treeNode, int parentId)
   {
               foreach (TreeNode node in tNode.Nodes)
                    {
                          if ((int)node.Tag == parentId)
                             {
                                  node.Nodes.Add(treeNode);
                                 return;
                             }else if (node.Nodes.Count > 0)
                             {
                                  FindChildNode(node, treeNode, parentId);
                              }
       
                 }
   
  }

 

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