ASP.NET Core 配置文件(無處不在的依賴註入)
阿新 • • 發佈:2017-08-16
word gist .net core closed 數據 minus [] etsec 過程
前煙:
.NET Core 中取消了以往的 XML 節點配置文件,改用了 *.json 格式。
在 Startup.cs 文件中,構造方法 build appsetting.json 文件,
本文主要對解析配置文件的官方工具類做總結;
一、appsettings.json 文件
在新建的 Core Web 項目中,默認會有一個全局的配置變量:IConfigurationRoot
提供了索引器、GetSection 方法;
{ "Host": "http://localhost:5966/", "Title": "Hello World","SiteKeywords": "asp.net, c#, asp.net core, asp.net entityframework core", "Description": "DotNetClub: asp.net core", "ConnectionString": "Data Source=localhost;Initial Catalog=dbName;User Id=userName;Password=pwd;", "Redis": { "EndPoints": [ "localhost", "6379" ], "Password": "", "Db": "" }, "Site": { "Host": "http://localhost:5966", "Title": "Hello World", "Description": "DotNetClub: asp.net core", "AllowRegister": true, "VerifyRegisterUser": false, "AdminUserList": [] }, "CookieName": "DotNetClub.User", "Categories": [ {"Key": "share", "Name": "分享" }, { "Key": "ask", "Name": "問答" }, { "Key": "job", "Name": "招聘" } ] }
獲取根節點數據:
Configuration["ConnectionString"]
Configuration["Title"]
獲取節點數據:
services.Configure<RedisOptions>(Configuration.GetSection("Redis").Bind)
重點記錄的是這個 Microsoft.Extensions.Options.ConfigurationExtensions 提供的 IOptions
Configure 方法可以將 appsettings.json 中的配置綁定某一個實體對象上。如:
public class RedisOptions { /// <summary> /// Redis end points, such as "{host or ip}:{port}" /// </summary> public string[] EndPoints { get; set; } /// <summary> /// Redis password /// </summary> public string Password { get; set; } /// <summary> /// Default redis database /// </summary> public int Db { get; set; } }View Code
完成這樣的一個過程就是 Configure 類實現了一個依賴註入;
ASP.NET Core 配置文件(無處不在的依賴註入)