ElmahCore.MySql 2.1.1

.NET Standard 2.0
There is a newer version of this package available.
See the version list below for details.
dotnet add package ElmahCore.MySql --version 2.1.1
NuGet\Install-Package ElmahCore.MySql -Version 2.1.1
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.
<PackageReference Include="ElmahCore.MySql" Version="2.1.1" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add ElmahCore.MySql --version 2.1.1
#r "nuget: ElmahCore.MySql, 2.1.1"
#r directive can be used in F# Interactive, C# scripting and .NET Interactive. Copy this into the interactive tool or source code of the script to reference the package.
// Install ElmahCore.MySql as a Cake Addin
#addin nuget:?package=ElmahCore.MySql&version=2.1.1

// Install ElmahCore.MySql as a Cake Tool
#tool nuget:?package=ElmahCore.MySql&version=2.1.1

This project is licensed under the terms of the Apache license 2.0.

Using ElmahCore

ELMAH for Net.Standard and Net.Core (3.1, 5, 6)

alt text

Add nuget package elmahcore

Simple usage


1)	services.AddElmah() in ConfigureServices 
2)	app.UseElmah(); in Configure

app.UseElmah() must be after initializing other exception handling middleware, such as (UseExceptionHandler, UseDeveloperExceptionPage, etc.)

Default elmah path ~/elmah.

Change URL path

services.AddElmah(options => options.Path = "you_path_here")

Restrict access to the Elmah url

services.AddElmah(options =>
        options.OnPermissionCheck = context => context.User.Identity.IsAuthenticated;

Note: app.UseElmah(); needs to be after


or the user will be redirected to the sign in screen even if he is authenticated.

Change Error Log type

You can create your own error log, which will store errors anywhere.

    class MyErrorLog: ErrorLog
    //implement ErrorLog

This ErrorLogs available in board:

  • MemoryErrorLog – store errors in memory (by default)
  • XmlFileErrorLog – store errors in XML files
  • SqlErrorLog - store errors in MS SQL (add reference to ElmahCore.Sql)
  • MysqlErrorLog - store errors in MySQL (add reference to ElmahCore.MySql)
  • PgsqlErrorLog - store errors in PostgreSQL (add reference to ElmahCore.Postgresql)
services.AddElmah<XmlFileErrorLog>(options =>
    options.LogPath = "~/log"; // OR options.LogPath = "с:\errors";
services.AddElmah<SqlErrorLog>(options =>
    options.ConnectionString = "connection_string";
    options.SqlServerDatabaseSchemaName = "Errors"; //Defaults to dbo if not set
    options.SqlServerDatabaseTableName = "ElmahError"; //Defaults to ELMAH_Error if not set

Raise exception

public IActionResult Test()
    HttpContext.RaiseError(new InvalidOperationException("Test"));

Microsoft.Extensions.Logging support

Since version 2.0 ElmahCore support Microsoft.Extensions.Logging alt text

Source Preview

Since version 2.0.1 ElmahCore support source preview. Just add paths to source files.

services.AddElmah(options =>
   options.SourcePaths = new []

Log the request body

Since version 2.0.5 ElmahCore can log the request body.

Logging SQL request body

Since version 2.0.6 ElmahCore can log the SQL request body. alt text

Logging method parameters

Since version 2.0.6 ElmahCore can log method parameters. alt text

using ElmahCore;

public void TestMethod(string p1, int p2)
    // Logging method parameters
    this.LogParams((nameof(p1), p1), (nameof(p2), p2));

Using UseElmahExceptionPage

You can replace UseDeveloperExceptionPage to UseElmahExceptionPage

if (env.IsDevelopment())

Using Notifiers

You can create your own notifiers by implement IErrorNotifier interface and add notifier to Elmah options:

services.AddElmah<XmlFileErrorLog>(options =>
    options.Path = @"errors";
    options.LogPath = "~/logs";
    options.Notifiers.Add(new ErrorMailNotifier("Email",emailOptions));

Each notifier must have unique name.

Using Filters

You can use Elmah XML filter configuration in separate file, create and add custom filters:

services.AddElmah<XmlFileErrorLog>(options =>
    options.FiltersConfig = "elmah.xml";
    options.Filters.Add(new MyFilter());

Custom filter must implement IErrorFilter. XML filter config example:

<?xml version="1.0" encoding="utf-8" ?>
			<notifier name="Email"/>
				<greater binding="HttpStatusCode" value="399" type="Int32" />
				<lesser  binding="HttpStatusCode" value="500" type="Int32" />

see more here

JavaScript filters not yet impemented 😦

Add notifiers to errorFilter node if you do not want to send notifications Filtered errors will be logged, but will not be sent.

Product Versions
.NET net5.0 net5.0-windows net6.0 net6.0-android net6.0-ios net6.0-maccatalyst net6.0-macos net6.0-tvos net6.0-windows net7.0 net7.0-android net7.0-ios net7.0-maccatalyst net7.0-macos net7.0-tvos net7.0-windows
.NET Core netcoreapp2.0 netcoreapp2.1 netcoreapp2.2 netcoreapp3.0 netcoreapp3.1
.NET Standard netstandard2.0 netstandard2.1
.NET Framework net461 net462 net463 net47 net471 net472 net48
MonoAndroid monoandroid
MonoMac monomac
MonoTouch monotouch
Tizen tizen40 tizen60
Xamarin.iOS xamarinios
Xamarin.Mac xamarinmac
Xamarin.TVOS xamarintvos
Xamarin.WatchOS xamarinwatchos
Compatible target framework(s)
Additional computed target framework(s)
Learn more about Target Frameworks and .NET Standard.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last updated
2.1.2 1,547 5/14/2022
2.1.1 620 1/24/2022
2.1.0 364 1/19/2022
2.0.7 1,632 8/31/2021
2.0.6 1,351 2/6/2021
2.0.5 316 1/21/2021
2.0.4 395 1/20/2021
2.0.3 313 1/13/2021
2.0.1 284 12/28/2020
2.0.0 369 12/25/2020
1.2.7 324 12/13/2020
1.2.6 326 12/13/2020