ASP.NET记录错误日志的实现方法_.Net教程

using System.Globalization;

/// <summary>
/// 用于将错误信息输出到txt文件
/// </summary>
/// <param name="errorMessage">错误详细信息</param>
public static void WriteError(string errorMessage)
{
try
{
string path = "~/Error/" + DateTime.Today.ToString("yyMMdd") + ".txt";
if (!File.Exists(System.Web.HttpContext.Current.Server.MapPath(path)))
{
File.Create(System.Web.HttpContext.Current.Server.MapPath(path)).Close();
}
using (StreamWriter w = File.AppendText(System.Web.HttpContext.Current.Server.MapPath(path)))
{
w.WriteLine("/r/nLog Entry : ");
w.WriteLine("{0}", DateTime.Now.ToString(CultureInfo.InvariantCulture));
w.WriteLine(errorMessage);
w.WriteLine("________________________________________________________");
w.Flush();
w.Close();
}
}
catch (Exception ex)
{
WriteError(ex.Message);
}
}

void Application_Error(object sender, EventArgs e)
{
// 在出现未处理的错误时运行的代码
Exception objErr = Server.GetLastError().GetBaseException();
//记录出现错误的IP地址
string strIP = Request.UserHostAddress;
string err = "Ip【" + strIP + "】" + Environment.NewLine + "Error in【" + Request.Url.ToString() +
"】" + Environment.NewLine + "Error Message【" + objErr.Message.ToString() + "】";
//记录错误
FN.WriteError(err);
}

<system.web>
<customErrors mode="RemoteOnly" defaultRedirect="GenericErrorPage.htm">
<!--可以指定其他错误页面...-->
</customErrors>
</system.web>