C# 操作Hosts 新增修改删除

shiy720

1. class ModifyHosts
   
2. {
   
3.     /// <summary>
   
4.     /// 新增hosts记录
   
5.     /// </summary>
   
6.     /// <param name="ip"></param>
   
7.     /// <param name="domain"></param>
   
8.     public static void Add_Hosts(string domain, string ip)
   
9.     {
   
10.         string path = Environment.GetFolderPath(Environment.SpecialFolder.System) + "\\drivers\\etc\\hosts";
    
11.         string[] hosts = File.ReadAllLines(path);
    
12.         List<string> list = hosts.ToList();
    
13.         string temp = hosts.ToList().FirstOrDefault(x => x.Contains(domain));
    
14.         if (string.IsNullOrEmpty(temp))
    
15.         {
    
16.             list.Add($"{ip} {domain}");
    
17.         }
    
18.         File.WriteAllLines(path, list.ToArray());
    
19.     }
    
20.     /// <summary>
    
21.     /// 更新Hosts记录
    
22.     /// </summary>
    
23.     /// <param name="ip"></param>
    
24.     /// <param name="domain"></param>
    
25.     public static void Update_Hosts(string domain, string ip)
    
26.     {
    
27.         string path = Environment.GetFolderPath(Environment.SpecialFolder.System) + "\\drivers\\etc\\hosts";
    
28.         string[] hosts = File.ReadAllLines(path);
    
29.         List<string> list = hosts.ToList();
    
30.         list.RemoveAll(x => x.Contains(domain));
    
31.         list.Add($"{ip} {domain}");
    
32.         File.WriteAllLines(path, list.ToArray());
    
33.     }
    
34. 
    
35.     /// <summary>
    
36.     /// 删除Hosts记录
    
37.     /// </summary>
    
38.     /// <param name="hosts_str"></param>
    
39.     public static void Remove_Hosts(string hosts_str)
    
40.     {
    
41.         string path = Environment.GetFolderPath(Environment.SpecialFolder.System) + "\\drivers\\etc\\hosts";
    
42.         string[] hosts = File.ReadAllLines(path);
    
43.         List<string> list = hosts.ToList();
    
44.         list.RemoveAll(x => x.Contains(hosts_str));
    
45.         File.WriteAllLines(path, list.ToArray());
    
46.     }
    
47. }

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