How to log all error ocured in site?

I want write an module how log all errors in site. Please guide me.开发者_高级运维

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Global.asax:

 <%@ Application Inherits="MyProj.Global" %>

Global.asax.cs:

namespace MyProj
{
    public class Global : HttpApplication
    {
        protected virtual void Application_Error(object sender, EventArgs e)
        {
            Exception ex = Server.GetLastError().GetBaseException();
        }
    }
}

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Take a look at the Application_Error event, that can be put in a Global.asax file (more info here and here).
Basically that event is called every time there is an unhandled exception in your application code - one more reason not to handle exceptions that you can't manage.

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Don't write your own but use an existing one like log4net or NLog

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Suggest looking at the little-known free ELMAH error reporting module for ASP.NET.

Very cool: