日志文件 怎么写啊
没写过 
 给个例子吧 
------解决方案--------------------log4net 
 or 
 Logging Application Block of Enterprise Library
------解决方案--------------------偶觉得可以自己操作文件,写入捕获的异常
------解决方案--------------------最简单的方法就是写个文件流,在一个TXT文件里写你的程序日志,这是最简单的如果想复杂一些就可以用1楼的方法
------解决方案--------------------using System; 
 using System.Collections.Generic; 
 using System.Text; 
 using System.IO;   
 namespace Test 
 { 
     class PublicLogUnit 
     { 
         private string GetCurdate() 
         { 
             string strDate; 
             string strYear = System.DateTime.Today.Year.ToString(); 
             string strMonth = System.DateTime.Today.Month.ToString(); 
             if (strMonth.Length == 1) 
             { 
                 strMonth =  "0 " + strMonth; 
             } 
             string strDay = System.DateTime.Today.Day.ToString(); 
             if (strDay.Length == 1) 
             { 
                 strDay =  "0 " + strDay; 
             } 
             return strDate = strYear + strMonth + strDay; 
         }   
         private string GetCurTime() 
         { 
             string strTime; 
             string strHour = System.DateTime.Now.Hour.ToString(); 
             if (strHour.Length == 1) 
             { 
                 strHour =  "0 " + strHour; 
             } 
             string strMin = System.DateTime.Now.Minute.ToString(); 
             if (strMin.Length == 1) 
             { 
                 strMin =  "0 " + strMin; 
             } 
             string strSec = System.DateTime.Now.Second.ToString(); 
             if (strSec.Length == 1) 
             { 
                 strSec =  "0 " + strSec; 
             } 
             return strTime = strHour +  ": " + strMin +  ": " + strSec; 
         }   
         public void WriteToLog(string logMsg) 
         { 
             string strDate, strTime; 
             strDate = GetCurdate(); 
             strTime = GetCurTime(); 
             StreamWriter sw = File.AppendText(System.IO.Directory.GetCurrentDirectory().ToString() +  "\\ " + strDate +  ".log "); 
             sw.WriteLine( "[ " + strDate +  "  " + strTime +  "][信息: " + logMsg +  "] "); 
             sw.Close(); 
         } 
     } 
 }
------解决方案--------------------log4net 吧.很容易!
------解决方案--------------------就是上面的方法用StreamWriter流来生成一log文件,往里面write内容。。
------解决方案--------------------可以定义一个日志类,根据需要设计日志属性,保存的文件或数据库都可以呀。 
 也可以用log4net,使用也很简单。 
------解决方案--------------------关注