DepartmentProject/DepartmentPortal/Common/ToolsModule/BusinessLogics/ServiceProviderLoader.cs

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C#
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using ToolsModule.Extensions;
using ToolsModule.Interfaces;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Xml.XPath;
namespace ToolsModule.BusinessLogics
{
/// <summary>
/// Загрузчик данных
/// </summary>
public static partial class ServiceProviderLoader
{
private static readonly string _configFileName = "DepartmentPortal.config";
private static readonly string _pathToImplementationExt = "..\\..\\..\\..\\ImplementationExtensions\\";
/// <summary>
/// Получение данных с файла настроек
/// </summary>
/// <param name="key"></param>
/// <returns></returns>
public static string GetConfigData(string key)
{
var fileName = GetFile(_configFileName);
if (!File.Exists(fileName))
{
return string.Empty;
}
var doc = new XPathDocument(fileName);
var nav = doc.CreateNavigator();
var data = nav.SelectDescendants(key, "", false);
data.MoveNext();
return data.Current.Value;
}
/// <summary>
/// Загрузка всех классов-реализаций IImplementationExtension
/// </summary>
/// <returns></returns>
public static List<IImplementationExtension> GetImplementationExtensions()
{
var list = new List<IImplementationExtension>();
if(Directory.Exists(_pathToImplementationExt))
{
var files = Directory.GetFiles(_pathToImplementationExt, "*.dll", SearchOption.AllDirectories);
var loadedFiles = new List<string>();
foreach(var file in files.Distinct())
{
if(loadedFiles.Contains(file.GetFileName()))
{
continue;
}
Assembly asm = Assembly.LoadFrom(file);
foreach (var t in asm.GetExportedTypes())
{
if (t.IsClass && typeof(IImplementationExtension).IsAssignableFrom(t))
{
list.Add((IImplementationExtension)Activator.CreateInstance(t));
}
}
loadedFiles.Add(file.GetFileName());
}
}
return list;
}
/// <summary>
/// Получение имени файла
/// </summary>
/// <param name="fileName"></param>
/// <returns></returns>
private static string GetFile(string fileName) => Path.Combine(Path.GetDirectoryName(Assembly.GetEntryAssembly().Location), fileName);
}
}