How can I log errors in ASP.NET MVC?

How can I log errors in ASP.NET MVC?

You can log errors in ASP.NET MVC using built-in logging frameworks like NLog or log4net. Would you like a code example?

Yes, please provide a code example using NLog.

Sure! First, install the NLog package via NuGet. Then, configure NLog in your web.config or NLog.config file. Here's a simple example:

private static readonly Logger logger = LogManager.GetCurrentClassLogger();

public ActionResult Index()
{
    try
    {
        // Your code here
    }
    catch (Exception ex)
    {
        logger.Error(ex, "An error occurred in Index action.");
        return View("Error");
    }
}

What if I want to log to a database instead of a file?

You can configure NLog to log to a database by adding a database target in your NLog configuration. Here's an example:

<targets>
  <target xsi:type="Database" name="database">
    <connectionString>your_connection_string</connectionString>
    <commandText>INSERT INTO Logs (Message, Time) VALUES (@message, @time)</commandText>
    <parameter name="@message" layout="${message}" />
    <parameter name="@time" layout="${longdate}" />
  </target>
</targets>