记录游客页面访问IP的简易实现代码 (asp.net+txt)

using System; 
using System.IO; 

/// <summary> 
/// File 
/// </summary> 
public class File 
{ 
protected string FilePath; 

/// <summary> 
/// File构造 
/// </summary> 
/// <param name="filePath">需要操作的文本路径</param> 
public File(string filePath) 
{ 
this.FilePath = filePath; 
} 

/// <summary> 
/// 文本内容写入 
/// </summary> 
/// <param name="info">写入内容</param> 
public void FileWrite(string info) 
{ 
try 
{ 
FileInfo file = new FileInfo(FilePath); 

if (!file.Exists) 
{ 
using (StreamWriter sw = file.CreateText()) 
{ 
sw.WriteLine(info); 
} 
} 
else 
{ 
using (StreamWriter sw = file.AppendText()) 
{ 
sw.WriteLine(info); 
} 
} 
} 
catch(FileNotFoundException fileCe) 
{ 
throw fileCe; 
} 
catch (Exception ce) 
{ 
throw ce; 
} 
} 
} 

public partial class _Default : System.Web.UI.Page 
{ 
protected void Page_Load(object sender, EventArgs e) 
{ 
if (!IsPostBack) 
{ 
//判断当前用户是否访问过，只记录未访问过的用户 
if (Request.Cookies["IsExitsIP"] == null) 
{ 
//每天一个记事本.txt 
string fileName = string.Format("{0}{1}{2}", DateTime.Now.Year.ToString(), DateTime.Now.Month.ToString(), DateTime.Now.Day.ToString()); 
File file = new File(Server.MapPath("~/test/" + fileName + ".txt")); 
file.FileWrite(Request.UserHostName); 
//给正在访问的用户添加已访问标记 
HttpCookie cokie = new HttpCookie("IsExitsIP"); 
cokie.Values.Add("ip", Request.UserHostName); 
Response.AppendCookie(cokie); 
} 
} 
} 
}