asp.net错误日志写入

<% @ApplicationLanguage = " C# " %>

< scriptrunat = " server " >

void Application_Start( object sender,EventArgse)
{
// 在应用程序启动时运行的代码

}

void Application_End( object sender,EventArgse)
{
// 在应用程序关闭时运行的代码

}

void Application_Error( object sender,EventArgse)
{
// 在出现未处理的错误时运行的代码

ExceptionobjErr = Server.GetLastError().GetBaseException();
string error = string .Empty;
string errortime = string .Empty;
string erroraddr = string .Empty;
string errorinfo = string .Empty;
string errorsource = string .Empty;
string errortrace = string .Empty;

error += " 发生时间: " + System.DateTime.Now.ToString() + " <br> " ;
errortime = " 发生时间: " + System.DateTime.Now.ToString();

error += " 发生异常页: " + Request.Url.ToString() + " <br> " ;
erroraddr = " 发生异常页: " + Request.Url.ToString();

error += " 异常信息: " + objErr.Message + " <br> " ;
errorinfo = " 异常信息: " + objErr.Message;

// error+="错误源:"+objErr.Source+"<br>";
// error+="堆栈信息:"+objErr.StackTrace+"<br>";
errorsource = " 错误源: " + objErr.Source;
errortrace = " 堆栈信息: " + objErr.StackTrace;
error += " --------------------------------------<br> " ;
Server.ClearError();
Application[ " error " ] = error;

// 独占方式，因为文件只能由一个进程写入.
System.IO.StreamWriterwriter = null ;
try
{
lock ( this )
{
// 写入日志
string year = DateTime.Now.Year.ToString();
string month = DateTime.Now.Month.ToString();
string path = string .Empty;
string filename = DateTime.Now.Day.ToString() + " .txt " ;
path = Server.MapPath( " ~/Error/ " ) + year + " / " + month;
// 如果目录不存在则创建
if ( ! System.IO.Directory.Exists(path))
{
System.IO.Directory.CreateDirectory(path);
}
System.IO.FileInfofile = new System.IO.FileInfo(path + " / " + filename);
// if(!file.Exists)
// file.Create();
// file.Open(System.IO.FileMode.Append);
writer = new System.IO.StreamWriter(file.FullName, true ); // 文件不存在就创建,true表示追加
writer.WriteLine( " 用户IP: " + Request.UserHostAddress);
// if(Session["UserName"]!=null)
// {
// writer.WriteLine("用户名"+System.Web.HttpContext.Current.Session["UserName"].ToString());
// }
writer.WriteLine(errortime);
writer.WriteLine(erroraddr);
writer.WriteLine(errorinfo);
writer.WriteLine(errorsource);
writer.WriteLine(errortrace);
writer.WriteLine( " -------------------------------------------------------------------------------------- " );
// writer.Close();
}
}
finally
{
if (writer != null )
writer.Close();

}
Response.Redirect( " ~/Error/ErrorPage.aspx " );


}

void Session_Start( object sender,EventArgse)
{
// 在新会话启动时运行的代码
Session.Timeout = 60 ;
if (Session.IsNewSession)
{
lock ( this )
{
if (Application[ " Counts " ] != null )
{
Application[ " Counts " ] = Int32.Parse(Application[ " Counts " ].ToString()) + 1 ;
}
else
{
Application[ " Counts " ] = 1 ;
}
}
}
}

void Session_End( object sender,EventArgse)
{
// 在会话结束时运行的代码。
// 注意:只有在Web.config文件中的sessionstate模式设置为
// InProc时，才会引发Session_End事件。如果会话模式设置为StateServer
// 或SQLServer，则不会引发该事件。
if (Application[ " Counts " ] != null )
{
Application[ " Counts " ] = Int32.Parse(Application[ " Counts " ].ToString()) - 1 ;
}
}

</ script >

<% @PageLanguage = " C# " AutoEventWireup = " true " CodeFile = " ErrorPage.aspx.cs " Inherits = " Error_ErrorPage " %>

<! DOCTYPEhtmlPUBLIC " -//W3C//DTDXHTML1.0Transitional//EN " " http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd " >

< htmlxmlns = " http://www.w3.org/1999/xhtml " >
< headrunat = " server " >
< title > 出错信息 </ title >
< linkhref = " css/SITE.CSS " type = " text/css " rel = " stylesheet " />
</ head >
< body >
< formid = " form1 " runat = " server " >
< asp:LabelID = " Label1 " runat = " server " Width = " 568px " ></ asp:Label >

</ form >
</ body >
</ html >

protected void Page_Load( object sender,EventArgse)
{
this .Label1.Text = Application[ " Error " ].ToString();
}