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Configuring Elmah for use with ASP.NET Core

howto

Years ago, I wrote an article on how to configure Elmah to be used on Winhost.  You may have noticed that there is no official support for ASP.NET Core, however, you can use ElmahCore by barestan to perform the same logging to a database, and this blog provides an example on how to set that up.

First, we’ll start by creating a New Project in Visual Studio:

 

 

 

 

services.AddElmah<SqlErrorLog>(options =>
{
    options.ConnectionString = @"connection_string";
});
app.UseElmah();

That’s it.  If you want to know if it’s working, you can generate a sample exception like this:

app.Run(async (context) =>
{                
    await context.Response.WriteAsync("Hello World!");
    int[] numbers = new int[5];
    await context.Response.WriteAsync(numbers[6].ToString());
});

That will generate an “Index was outside the bounds of the array.” exception which will be logged into the database.  You can query the dbo.ELMAH_Error table to see the results.

 

Visit Winhost to learn more about our .NET Core hosting solutions