过滤并将字符串加载到列表框中-Filterandloadstringtoalistbox

I have a txt file contains:

我有一个txt文件包含:

#
#test
this is a test
127.0.0.1    test69.com
127.0.0.1    http://test69.com
127.0.0.1    www.test69.com
127.0.0.1    man.test
127.0.0.1    http://man.test
127.0.0.1    www.man.test
127.0.0.1    www.another.test

How can I load all the lines in to a listbox but just keep only 3 lines in listbox like :

如何将所有行加载到列表框中,但只在列表框中保留3行,如:

test69.com
man.test
another.test

Example: My code works well but I can't avoid that my listbox loaded www.test69.com and http://test69.com but I don't want them, I just want something like test69.com appears

示例:我的代码运行良好,但我无法避免我的列表框加载www.test69.com和http://test69.com但我不想要它们,我只想要像test69.com这样的东西出现

string str = "";
        StreamReader sr = new StreamReader("C:\\Users\\GhoSter\\Desktop\\test.txt");
        while ((str = sr.ReadLine()) != null)
        {
            if (Check(str) == true)
            {
                string localip = str.Substring(0,9);
                string load = str.Replace(localip + "   ", "");
                myList.Add(load);
            }
        }
        this.listBox1.DataSource = myList;
    }

    bool Check(string s)
    {
        bool flag = false;
        if (s == "" || s == null)
            flag = false;
        else
        {
            string first = s.Substring(0, 1);
            switch (first)
            {
                case "0":
                case "1":
                case "2":
                case "3":
                case "4":
                case "5":
                case "6":
                case "7":
                case "8":
                case "9":
                    flag = true;
                    break;
                default:
                    flag = false;
                    break;
            }
        }
        return flag;
    }

4 个解决方案

 string[] lines = File.ReadAllLines(AppDomain.CurrentDomain.BaseDirectory + @"\fil.txt");

        int ctr = 0;

        foreach (var item in lines)
        {
            string tmp = item;

            tmp = tmp.Replace("127.0.0.1", "");
            tmp = tmp.Replace("http://", "");
            tmp = tmp.Replace("www.", "");
            tmp = tmp.Trim();

            if (ctr 

var listOfDistinctUrls = File.ReadLines(@"PathToTextFile");
    .Where(l => !string.IsNullOrWhiteSpace(l))
    .Select(l => {
        string token = l.Split().Last();
        Uri uri;
        if (Uri.TryCreate(token, UriKind.RelativeOrAbsolute, out uri))
        {
            string fileName = Path.GetFileName(uri.IsAbsoluteUri ? uri.Host + uri.PathAndQuery : uri.ToString());
            int wwwIndex = fileName.IndexOf("www.", 0, StringComparison.OrdinalIgnoreCase);
            return wwwIndex >= 0 ? fileName.Substring(wwwIndex + 4) : fileName;
        }
        else
            return null;
    })
    .Where(u => !string.IsNullOrWhiteSpace(u))
    .Distinct()
    .ToList();

test69.com
man.test

string[] lines =File.ReadAllLines(yourpathFile);  
//in your listbox 
listBox1.Items.AddRange(lines.Take(6).ToArray()); 

List arr = new List();
StreamReader r = File.OpenText( Server.MapPath("b.txt"));
while (!r.EndOfStream)
{
   Match match = Regex.Match(r.ReadLine(), @"(www.|http://)([\w.]+)$");
   if (match.Success)
   {
     arr.Add(Regex.Replace(match.Value, @"(http://|www.)", ""));
   }
}
ListBox1.DataSource = arr.Distinct();
ListBox1.DataBind();