如何将此文本文件内容转换为可以绑定到TreeView的递归对象集合？也就是说,我希望得到一个由3个对象组成的集合,第一个称为拥有三个子对象集合的国家：法国,德国,意大利等等……
答：感谢所有帮助过这一点的人,这是我的代码,它成功地将此文本大纲解析为XAML树：http://tanguay.info/web/index.php?pg=codeExamples&id=358
countries -france --paris --bordeaux -germany -italy subjects -math --algebra --calculus -science --chemistry --biology other -this -that
下面的代码是我得到的,但它没有正确处理多个父母的孩子.
using System;
using System.Collections.Generic;
using System.Text;
namespace TestRecursive2342
{
class Program
{
static void Main(string[] args)
{
List<OutlineObject> outlineObjects = new List<OutlineObject>();
//convert file contents to object collection
List<string> lines = Helpers.GetFileAsLines();
Stack<OutlineObject> stack = new Stack<OutlineObject>();
foreach (var line in lines)
{
OutlineObject oo = new OutlineObject(line);
if (stack.Count > 0)
{
OutlineObject topObject = stack.Peek();
if (topObject.Indent < oo.Indent)
{
topObject.OutlineObjects.Add(oo);
stack.Push(oo);
}
else
{
stack.Pop();
stack.Push(oo);
}
}
else
{
stack.Push(oo);
}
if(oo.Indent == 0)
outlineObjects.Add(oo);
}
outlineObjects.ForEach(oo => Console.WriteLine(oo.Line));
Console.ReadLine();
}
}
public class OutlineObject
{
public List<OutlineObject> OutlineObjects { get; set; }
public string Line { get; set; }
public int Indent { get; set; }
public OutlineObject(string rawLine)
{
OutlineObjects = new List<OutlineObject>();
Indent = rawLine.CountPrecedingDashes();
Line = rawLine.Trim(new char[] { '-',' ','\t' });
}
}
public static class Helpers
{
public static List<string> GetFileAsLines()
{
return new List<string> {
"countries","-france","--paris","--bordeaux","-germany","-italy","subjects","-math","--algebra","--calculus","-science","--chemistry","--biology","other","-this","-that"};
}
public static int CountPrecedingDashes(this string line)
{
int tabs = 0;
StringBuilder sb = new StringBuilder();
foreach (var c in line)
{
if (c == '-')
tabs++;
else
break;
}
return tabs;
}
}
}
解决方法
public class Item
{
public string Name;
public Item Parent;
}
List<Item> Collection = new List<Item>();
public void Main()
{
var DataSource = data.InnerText;
StreamReader Reader = new StreamReader(MapPath("_test2.txt"));
int LastLevel = 0;
while (Reader.EndOfStream == false) {
var line = Reader.ReadLine();
var Level = line.Where((System.Object c) => c == "-").Count;
Item LastItem = default(Item);
if (Collection.Count != 0) {
LastItem = Collection.Last();
}
if (Level == 0) {
Collection.Add(new Item { Name = line });
LastLevel = 0;
}
else if (Level - LastLevel == 1) {
Collection.Add(new Item { Name = line,Parent = LastItem });
LastLevel += 1;
}
else if (Level == LastLevel) {
Collection.Add(new Item { Name = line,Parent = LastItem.Parent });
}
else if (Level < LastLevel) {
var LevelDiff = LastLevel - Level;
Item Parent = LastItem;
for (i = 0; i <= LevelDiff; i++) {
Parent = Parent.Parent;
}
LastLevel = Level;
Collection.Add(new Item { Name = line,Parent = Parent });
}
}
Reader.Close();
}
这应该可以解决问题.我在你的文本文件上测试了它.可能存在一些错误.测试它并告诉它是否有效.
编辑：实际上经过进一步测试后发现这不能按预期工作.您需要添加更多逻辑才能使其正常工作.我把它留给你.
编辑：经过测试代码后,我来到一个更好的版本.我仍然无法保证它在任何情况下都能正常工作.