读写文件之日志文件

咱们在写软件的时候，常常要记录一些登录信息、删除信息之类，便于往后查询。我简单写了一个针对日志文件的类，能够经过此类能够自定义日志文件名称，当日志达到规定大小时，自动备份，路径能够自行定义具体以下： 命名空间：

using System; using System.Web; using System.IO; using System.Text;

具体实现： public class LogFile { protected string LogfileName; // 文件名称 protected string LogPath = "../upedFile"; // 文件路径 protected int LogMaxContent = 2048; // 文件大小 protected string InputContent; // 具体内容

public LogFile() {

}

public LogFile(string StrLogfileName,string StrInputContent,string StrLogPath) { LogfileName = StrLogfileName; InputContent = StrInputContent; LogPath = StrLogPath;

}

public void LogWrite() { // string PathName = System.Web.HttpContext.Current.Server.MapPath(LogPath) + LogfileName; string PathName = System.Web.HttpContext.Current.Server.MapPath(LogPath) + "\" + LogfileName; FileInfo Finfo = new FileInfo(PathName);

string PathNameMove = PathName.Substring(0,PathName.LastIndexOf("\"))+"\" + DateTime.Now.ToString("yyyyMMddhhmm") + LogfileName;

if( Finfo.Exists && Finfo.Length > LogMaxContent ) // 若是超出，重名名 { Finfo.CopyTo(PathNameMove); Finfo.Delete(); }

try { using(FileStream Fs = Finfo.OpenWrite()) { StreamWriter Sw = new StreamWriter(Fs);

Sw.BaseStream.Seek(0, SeekOrigin.End); //设置写数据流的起始位置为文件流的末尾

 StringBuilder StrInput = new StringBuilder(); // 记录写入的内容
 StrInput.Append("\r\n Log Entry : "); 
 StrInput.Append(DateTime.Now.ToString());
 StrInput.Append("\r\n");
 StrInput.Append(InputContent + "\r\n");
 StrInput.Append("------------------------------------\n");

 Sw.Write(StrInput);    
 Sw.Flush();    
 Sw.Close();
}

} catch { System.Web.HttpContext.Current.Response.Write("<script language=javascript>alert('日志建立失败')</script>"); }

}