ErikEJ.SqlClient.Extensions

Adds support for .NET Dependency Injection and Logging for Microsoft.Data.SqlClient.

Installation

Install the latest package from NuGet.

Getting started

Microsoft.Data.SqlClient is the open source .NET data provider for Microsoft SQL Server. It allows you to connect and interact with SQL Server and Azure SQL Database using .NET.

This package helps set up SqlClient in applications using dependency injection, notably ASP.NET and Worker Service applications. It allows easy configuration of your database connections and registers the appropriate services in your DI container. It also enables you to log events from Microsoft.Data.SqlClient using standard .NET logging (ILogger).

For example, if using the ASP.NET minimal web API, simply use the following to register Microsoft.Data.SqlClient:

var builder = WebApplication.CreateBuilder(args);

builder.Services.AddSqlDataSource("Server=.\\SQLEXPRESS;Database=Northwind;Integrated Security=true;Trust Server Certificate=true");

This registers a transient SqlConnection which can get injected into your controllers:

app.MapGet("/", async (SqlConnection connection) =>
{
    await connection.OpenAsync();
    await using var command = new SqlCommand("SELECT TOP 1 SupplierID FROM Suppliers", connection);
    return "Hello World: " + await command.ExecuteScalarAsync();
});

But wait! If all you want is to execute some simple SQL, just use the singleton SqlDataSource to execute a command directly:

app.MapGet("/", async (SqlDataSource dataSource) =>
{
    await using var command = dataSource.CreateCommand("SELECT TOP 1 SupplierID FROM Suppliers");
    return "Hello World: " + await command.ExecuteScalarAsync();
});

SqlDataSource can also come in handy when you need more than one connection:

app.MapGet("/", async (SqlDataSource dataSource) =>
{
    await using var connection1 = await dataSource.OpenConnectionAsync();
    await using var connection2 = await dataSource.OpenConnectionAsync();
    // Use the two connections...
});

The AddSqlDataSource method also enables logging of Microsoft.Data.SqlClient activity in your ASP.NET Core app.

By default informational messages are logged, this can be configured via logging configuration:

{
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft.AspNetCore": "Warning",
      "Microsoft.Data.SqlClient": "Warning"
    }
  }
}

You can also disable SqlClient logging completely like this:

   builder.Services.AddSqlDataSource("Server=.\\SQLEXPRESS;Database=Northwind;Integrated Security=true;Trust Server Certificate=true", setupAction =>
   {
       setupAction.UseLoggerFactory(null);
   });

And you can turn on full logging like this:

   builder.Services.AddSqlDataSource("Server=.\\SQLEXPRESS;Database=Northwind;Integrated Security=true;Trust Server Certificate=true", setupAction =>
   {
       setupAction.EnableVerboseLogging();
   });

For more information, see the SqlClient documentation.