在c#winforms中填充树视图后，对树视图的子节点进行排序 [英] Sorting child nodes of a treeview after populating the treeview in c# winforms

问题描述

在我的winforms程序中，无法对Treeview的子节点进行排序.我的树视图由一些XML文件填充，并且它使用xml文件中的内部文本作为节点的Text属性(因此，我认为在将它们添加到树视图之前，如果可能的话，我无法对其进行排序，因为xml文件是尺寸很大，我不想浪费这个过程).我的程序中填充的树视图如下所示:

I am having trouble sorting child nodes of a treeview in my winforms program. My treeview is populated by some XML files and it uses an internal text inside the xml files as Text property of nodes (So I think I cant sort them before adding them to the tree view, or if it is possible, since the xml files are big in size I dont want to waste the process). A populated treeview in my program looks like this:

您可以猜到我希望子节点排序(我不希望HBM \ D10出现在HBM \ D1之后)，而是我想要:

As you can guess I want child nodes to sort like (I dont want HBM\D10 to come after HBM\D1) rather I want:

    HBM\D1
    HBM\D2
    HBM\D3
etc...

我已经尝试过treeView1.Sort()，并且还添加了beginUpdate和endUpdate，但是我没有成功:(

I have already tried treeView1.Sort() and also adding beginUpdate and endUpdate but I had no suceess :(

我正在使用.NET 4，任何技巧都会得到应用

I am using .NET 4, any tips would be appriciated

好吧，我根据托马斯的建议进行了整理:

    class NodeSorter : IComparer
{
        public int Compare(object x, object y) 
        {         
            TreeNode tx = (TreeNode)x; 
            TreeNode ty = (TreeNode)y;

            if (tx.Text.Length < ty.Text.Length)
            {
                return -1;
            }

            if (tx.Text.Length > ty.Text.Length)
            {
                return 1;
            }

            return 0;
        } 
}

推荐答案

您需要创建一个自定义比较器并将其分配给TreeViewNodeSorter属性:

You need to create a custom comparer and assign it to the TreeViewNodeSorter property:

public class NodeSorter : System.Collections.IComparer
{
    public int Compare(object x, object y)
    {
        TreeNode tx = (TreeNode)x;
        TreeNode ty = (TreeNode)y;

        // Your sorting logic here... return -1 if tx < ty, 1 if tx > ty, 0 otherwise
        ...
    }
}


...

treeView.TreeViewNodeSorter = new NodeSorter();
treeView.Sort();

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