我无法弄清楚如何将一个子节点添加到树视图

Question

这里是我的代码：

public Form1() 
{ 
    InitializeComponent(); 
    treeView1.Nodes.Add(new TreeNode("Graphic Requests")); 
    if (TreeNodesList == null) TreeNodesList = new List<TreeNode>(); 
    TreeNodesList.Add(new TreeNode("Art Not Started")); 
    TreeNodesList.Add(new TreeNode("Art In Progress")); 
    TreeNodesList.Add(new TreeNode("Items To Accept/Modify")); 
    TreeNodesList.Add(new TreeNode("Final Art Not Locked")); 

    foreach (var node in TreeNodesList) 
    { 
     treeView1.Nodes.Add(node); 
    } 
} 

我期待有一个父节点，“图形请求”，以增加儿童的其余节点。然而，我的名单看起来是这样的：

有人能告诉我，我缺少的是什么？

Answer 1

您正在将节点添加到treeView1，这就是为什么它们是父节点而不是子节点。而是将它们添加到您添加的第一个节点。

试试这个：

public Form1() 
{ 
    InitializeComponent(); 
    var parent = new TreeNode("Graphic Requests"); 

    TreeNodesList.Add(new TreeNode("Art Not Started")); 
    TreeNodesList.Add(new TreeNode("Art In Progress")); 
    TreeNodesList.Add(new TreeNode("Items To Accept/Modify")); 
    TreeNodesList.Add(new TreeNode("Final Art Not Locked")); 

    foreach (var node in TreeNodesList) 
    { 
     parent.Nodes.Add(node); 
    } 
    treeView1.Nodes.Add(parent); 
} 

Answer 2

您需要添加子节点的父节点的节点集合，否则他们都没有子节点，而是兄弟姐妹父节点。

public Form1() 
{ 
    InitializeComponent(); 

    var parentNode = new TreeNode("Graphic Requests"); 

    if (TreeNodesList == null) TreeNodesList = new List<TreeNode>(); 
    TreeNodesList.Add(new TreeNode("Art Not Started")); 
    TreeNodesList.Add(new TreeNode("Art In Progress")); 
    TreeNodesList.Add(new TreeNode("Items To Accept/Modify")); 
    TreeNodesList.Add(new TreeNode("Final Art Not Locked")); 

    foreach (var node in TreeNodesList) 
    { 
     parentNode.Nodes.Add(node); 
    } 
    treeView1.Nodes.Add(parentNode); 
} 

Answer 3

你必须做这样的事情要追加到父：

foreach (var node in TreeNodesList) 
{ 
    treeView1.Nodes[0].Nodes.Add(node); 
} 

如果你想找到填充TreeView更多信息，我建议你将以下article

Answer 4

你先需要在根节点添加到树，只是后来添加的子节点：

treeView1.Nodes.Add(new TreeNode("Graphic Requests")); // ROOT NODE 

TreeNode parentNode = treeView2.Nodes[0]; 
if (parentNode != null) 
{ 
    parentNode.Add(new TreeNode("Art Not Started")); 
    parentNode.Add(new TreeNode("Art In Progress")); 
    parentNode.Add(new TreeNode("Items To Accept/Modify")); 
    parentNode.Add(new TreeNode("Final Art Not Locked")); 
} 

Answer 5

你实际上直接将所有节点添加到treeview。应该将您的子节点添加到您的父节点“Graphic”，然后将您的父节点添加到您的树视图。 试试这个：

public Form1() 
{ 
    InitializeComponent(); 
    TreeNode parent = new TreeNode("Graphic Requests") 
    if (TreeNodesList == null) TreeNodesList = new List<TreeNode>(); 
    TreeNodesList.Add(new TreeNode("Art Not Started")); 
    TreeNodesList.Add(new TreeNode("Art In Progress")); 
    TreeNodesList.Add(new TreeNode("Items To Accept/Modify")); 
    TreeNodesList.Add(new TreeNode("Final Art Not Locked")); 

    foreach (var node in TreeNodesList) 
    { 
     parent.Nodes.Add(node); 
    } 
    treeView1.Nodes.Add(parent); 
}