1             string txt = @"C:\DetectFolder\IPV4地址.txt";

 2             string path = "";

 3

 4             if (File.Exists(txt)) { }//检测是否存在text文件，如果没有，则自动创造一个

 5             else

 6             {

 7                 FileStream fs = new FileStream(txt, FileMode.Create, FileAccess.Write);//创建TXT文件

 8                 fs.Close();

 9             }

10

11             StreamReader sR = File.OpenText(txt);//对“打开txt”的操作

12             string nextLine;

13             while ((nextLine = sR.ReadLine()) != null)

14             {

15                 path = nextLine;

16             }

17             sR.Close();

1             StreamWriter sw;//将文件名写入txt中

2             sw = File.AppendText(@"C:\DetectFolder\IPV4地址.txt");//将文件名写入运转室text中

3             sw.WriteLine(ip);

4             sw.Close();