Question

我的表单上有一个TreeView，它由用户输入填充。有三个值：游戏之夜，分区和玩家名称。

Treeview由这些值组织。意义分裂是游戏之夜的孩子，玩家命名为分裂的孩子。

当我使用已存在的分区向TreeView添加播放器时，搜索该节点将返回一个treenode的集合，但该节点的索引为0 - 在尝试将播放器添加到该节点时导致错误分裂。

这是我的代码：

    private void AddPlayerToTreeView(string playerName, string division, DateTime selDate)
    {
        TreeNode tn = new TreeNode();
        string shrtDate = selDate.ToShortDateString();

        //check to see if the date exists (shortdate format)
        // if doesn't exist: create the Night node and call the function recursively
        // if exists, check to see if division exists:
        //   if doesn't exist: create the Division node and call the function recursively
        //   if exists, add player


        TreeNode[] tns = this.tview_roster.Nodes.Find(shrtDate, false); //find the date in the root nodes

        if(tns.Length == 0) //the date doesn't exist in the list
        {
            tn = this.tview_roster.Nodes.Add(shrtDate, shrtDate);
            tn.ImageIndex = 2; //date icon

            this.AddPlayerToTreeView(playerName, division, selDate);
        }
        else //date exists, try to find division within it
        {
            var parentNight = tns[0].Index; //save the index of the night node

            tns = this.tview_roster.Nodes.Find(division, true); //search child nodes

            if (tns.Length == 0) //division doesn't exist, create it (and child nodes in recursive call)
            {
                tn = this.tview_roster.Nodes[parentNight].Nodes.Add(division, division);
                tn.ImageIndex = 1; //division icon

                this.AddPlayerToTreeView(playerName, division, selDate);
            }
            else //division exists, add player
            {
                var parentDiv = tns[0].Index; //THIS INDEX IS ALWAYS 0

                tn = this.tview_roster.Nodes[parentNight].Nodes[parentDiv].Nodes.Add(playerName, playerName);
                tn.ImageIndex = 0; //player icon
            }
        }
    }

正如您所看到的，问题出现在这一行：

var parentDiv = tns [0] .Index; //这个指数总是0

任何帮助将不胜感激，谢谢你的时间。

Answer 1

好吧，我发现了这个问题，并认为我可以回答我的问题，以防这可能对其他人有所帮助。

问题是我在搜索子节点（除法）时没有指向父节点（parentNight）。

这是我的更新和功能代码：

    private void AddPlayerToTreeView(string playerName, string division, DateTime selDate)
    {
        TreeNode tn = new TreeNode();
        string shrtDate = selDate.ToShortDateString();

        //check to see if the date exists (shortdate format)
        // if doesn't exist: create the Night node and call the function recursively
        // if exists, check to see if division exists:
        //   if doesn't exist: create the Division node and call the function recursively
        //   if exists, add player


        TreeNode[] tns = this.tview_roster.Nodes.Find(shrtDate, false); //find the date in the root nodes

        if(tns.Length == 0) //the date doesn't exist in the list
        {
            tn = this.tview_roster.Nodes.Add(shrtDate, shrtDate);
            tn.ImageIndex = 2; //date icon

            this.AddPlayerToTreeView(playerName, division, selDate);
        }
        else //date exists, try to find division within it
        {
            var parentNight = tns[0].Index; //save the index of the night node

            tns = this.tview_roster.Nodes[parentNight].Nodes.Find(division, false); //search child nodes

            if (tns.Length == 0) //division doesn't exist, create it (and child nodes in recursive call)
            {
                tn = this.tview_roster.Nodes[parentNight].Nodes.Add(division, division);
                tn.ImageIndex = 1; //division icon

                this.AddPlayerToTreeView(playerName, division, selDate);
            }
            else //division exists, add player
            {
                var parentDiv = tns[0].Index; //save the index of the division node

                tn = this.tview_roster.Nodes[parentNight].Nodes[parentDiv].Nodes.Add(playerName, playerName);
                tn.ImageIndex = 0; //player icon
            }
        }
    }

C＃TreeView.Nodes.find方法返回长度为＆gt;的集合。 0，但返回节点的索引为0

1 个答案: