C # written to the error log

Original link: http://www.cnblogs.com/TSPWater/archive/2010/08/27/1809995.html

 1    public   void  WriteLog(Exception ex)
 2      {
 3           try
 4          {
 5                String FolderPath  =  ConfigurationManager.AppSettings[ "" ];
 6 
 7               string  _path  =   "" ;
 8               if  ( ! IsPhysicalPath(FolderPath))
 9                  _path  =  HttpContext.Current.Server.MapPath(FolderPath);
10               else  _path  =  FolderPath;
11 
12              System.IO.DirectoryInfo dinfo  =   new  DirectoryInfo(_path);
13 
14               if  ( ! dinfo.Exists)
15                  dinfo.Create();
16              String filePath  =  _path  +  DateTime.Now.ToShortDateString()  +   " _Log.log " ;
17            
18              String logStr  =  String.Empty;
19              logStr  +=   " 发生时间： "   +  DateTime.Now.ToString()  +   " \r\n " ;
20              logStr  +=   " Requested address: " +  HttpContext.Current.Request.RawUrl  + " \ r \ the n- " ; 21             logStr  + = " Source Address: " +  ((HttpContext.Current.Request.UrlReferrer  == null )  ? " Url address bar directly input "  : HttpContext.Current.Request.UrlReferrer.AbsoluteUri)  + " \ R & lt \ n- " ; 22 is             logStr  + = " visitor P the I: " +  HttpContext.Current.Request.UserHostAddress  + "\r\n"    
           
        ;
23 is               logStr  + = " Error Class Name: " +  occurClass  + " \ R & lt \ n- ' ; 24             logStr  + = " Error Method: " +  occurMethod  + " \ R & lt \ n- ' ; 25             logStr  + = " Description: " +  ex.Message + " \ R & lt \ n- " ; 26 is             logStr  + = " trace information: " + EX.StackTrace+"      
       
     
    \ R & lt \ n- " ;
27               logStr  + = " --------------------------------------- -------------------------------------------------- ------------------------ \ R & lt \ n-\ R & lt \ n-\ R & lt \ n- " ; 28             File.AppendAllText (filePath, logStr, the System.Text .Encoding.Unicode); 29         } 30 the catch 31 is         {} 32     } 33 is // to true: absolute path; false: relative path 34  
 
 
          
 
 
      
       public   static   bool  IsPhysicalPath( string  Path)
35      {
36           string  RegexString  =   @" \b[a-z]:\\.* " ;
37          MatchCollection Matchs  =  Regex.Matches(Path, RegexString, RegexOptions.IgnoreCase  |  RegexOptions.Compiled);
38           if  (Matchs.Count  >   0 )
39               return   true ;
40           return   false ;
41      }

Reproduced in: https: //www.cnblogs.com/TSPWater/archive/2010/08/27/1809995.html