aspnetcore/src/Microsoft.AspNet.Mvc.ViewFeatures/Logging/ViewComponentResultLoggerExtensions.cs

// Copyright (c) .NET Foundation. All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.

using System;
using Microsoft.Extensions.Logging;

namespace Microsoft.AspNet.Mvc.Logging
{
    public static class ViewComponentResultLoggerExtensions
    {
        private static Action<ILogger, string, string[], Exception> _viewComponentResultExecuting;

        static ViewComponentResultLoggerExtensions()
        {
            _viewComponentResultExecuting = LoggerMessage.Define<string, string[]>(
                LogLevel.Information,
                1,
                "Executing ViewComponentResult, running {ViewComponentName} with arguments ({Arguments}).");
        }

        public static void ViewComponentResultExecuting(this ILogger logger, string viewComponentName, object[] arguments)
        {
            if (logger.IsEnabled(LogLevel.Information))
            {
                var formattedArguments = new string[arguments.Length];
                for (var i = 0; i < arguments.Length; i++)
                {
                    formattedArguments[i] = Convert.ToString(arguments[i]);
                }

                _viewComponentResultExecuting(logger, viewComponentName, formattedArguments, null);
            }
        }

        public static void ViewComponentResultExecuting(this ILogger logger, Type viewComponentType, object[] arguments)
        {
            if (logger.IsEnabled(LogLevel.Information))
            {
                var formattedArguments = new string[arguments.Length];
                for (var i = 0; i < arguments.Length; i++)
                {
                    formattedArguments[i] = Convert.ToString(arguments[i]);
                }

                _viewComponentResultExecuting(logger, viewComponentType.Name, formattedArguments, null);
            }
        }
    }
}