mvc_core_config
*:first-child {
margin-top: 0 !important;
}
body>*:last-child {
margin-bottom: 0 !important;
}
/* BLOCKS
=============================================================================*/
p, blockquote, ul, ol, dl, table, pre {
margin: 15px 0;
}
/* HEADERS
=============================================================================*/
h1, h2, h3, h4, h5, h6 {
margin: 20px 0 10px;
padding: 0;
font-weight: bold;
-webkit-font-smoothing: antialiased;
}
h1 tt, h1 code, h2 tt, h2 code, h3 tt, h3 code, h4 tt, h4 code, h5 tt, h5 code, h6 tt, h6 code {
font-size: inherit;
}
h1 {
font-size: 28px;
color: #000;
}
h2 {
font-size: 24px;
border-bottom: 1px solid #ccc;
color: #000;
}
h3 {
font-size: 18px;
}
h4 {
font-size: 16px;
}
h5 {
font-size: 14px;
}
h6 {
color: #777;
font-size: 14px;
}
body>h2:first-child, body>h1:first-child, body>h1:first-child+h2, body>h3:first-child, body>h4:first-child, body>h5:first-child, body>h6:first-child {
margin-top: 0;
padding-top: 0;
}
a:first-child h1, a:first-child h2, a:first-child h3, a:first-child h4, a:first-child h5, a:first-child h6 {
margin-top: 0;
padding-top: 0;
}
h1+p, h2+p, h3+p, h4+p, h5+p, h6+p {
margin-top: 10px;
}
/* LINKS
=============================================================================*/
a {
color: #4183C4;
text-decoration: none;
}
a:hover {
text-decoration: underline;
}
/* LISTS
=============================================================================*/
ul, ol {
padding-left: 30px;
}
ul li > :first-child,
ol li > :first-child,
ul li ul:first-of-type,
ol li ol:first-of-type,
ul li ol:first-of-type,
ol li ul:first-of-type {
margin-top: 0px;
}
ul ul, ul ol, ol ol, ol ul {
margin-bottom: 0;
}
dl {
padding: 0;
}
dl dt {
font-size: 14px;
font-weight: bold;
font-style: italic;
padding: 0;
margin: 15px 0 5px;
}
dl dt:first-child {
padding: 0;
}
dl dt>:first-child {
margin-top: 0px;
}
dl dt>:last-child {
margin-bottom: 0px;
}
dl dd {
margin: 0 0 15px;
padding: 0 15px;
}
dl dd>:first-child {
margin-top: 0px;
}
dl dd>:last-child {
margin-bottom: 0px;
}
/* CODE
=============================================================================*/
pre, code, tt {
font-size: 12px;
font-family: Consolas, "Liberation Mono", Courier, monospace;
}
code, tt {
margin: 0 0px;
padding: 0px 0px;
white-space: nowrap;
border: 1px solid #eaeaea;
background-color: #f8f8f8;
border-radius: 3px;
}
pre>code {
margin: 0;
padding: 0;
white-space: pre;
border: none;
background: transparent;
}
pre {
background-color: #f8f8f8;
border: 1px solid #ccc;
font-size: 13px;
line-height: 19px;
overflow: auto;
padding: 6px 10px;
border-radius: 3px;
}
pre code, pre tt {
background-color: transparent;
border: none;
}
kbd {
-moz-border-bottom-colors: none;
-moz-border-left-colors: none;
-moz-border-right-colors: none;
-moz-border-top-colors: none;
background-color: #DDDDDD;
background-image: linear-gradient(#F1F1F1, #DDDDDD);
background-repeat: repeat-x;
border-color: #DDDDDD #CCCCCC #CCCCCC #DDDDDD;
border-image: none;
border-radius: 2px 2px 2px 2px;
border-style: solid;
border-width: 1px;
font-family: "Helvetica Neue",Helvetica,Arial,sans-serif;
line-height: 10px;
padding: 1px 4px;
}
/* QUOTES
=============================================================================*/
blockquote {
border-left: 4px solid #DDD;
padding: 0 15px;
color: #777;
}
blockquote>:first-child {
margin-top: 0px;
}
blockquote>:last-child {
margin-bottom: 0px;
}
/* HORIZONTAL RULES
=============================================================================*/
hr {
clear: both;
margin: 15px 0;
height: 0px;
overflow: hidden;
border: none;
background: transparent;
border-bottom: 4px solid #ddd;
padding: 0;
}
/* TABLES
=============================================================================*/
table th {
font-weight: bold;
}
table th, table td {
border: 1px solid #ccc;
padding: 6px 13px;
}
table tr {
border-top: 1px solid #ccc;
background-color: #fff;
}
table tr:nth-child(2n) {
background-color: #f8f8f8;
}
/* IMAGES
=============================================================================*/
img {
max-width: 100%
}
-->
在.net core mvc中 配置文件格式更改为json且移除了ConfigurationManager.AppSettings[xmlkey]的方法,
那么，如何来获取配置信息呢？
第一步 将json文件添加到应用程序中
<default code>
public static void Main(string[] args)
{
BuildWebHost(args).Run();
}
public static IWebHost BuildWebHost(string[] args) =>
WebHost.CreateDefaultBuilder(args)
.UseStartup<Startup>()
.Build();
如果是使用默认的方法来启动的，则可以跳过此步
<reason>
查看源码 在 CreateDefaultBuilder方法中已使用添加配置文件
//配置信息处理 -- 用于第二步的读取配置信息
.ConfigureAppConfiguration((Action<WebHostBuilderContext, IConfigurationBuilder>) ((hostingContext, config) =>
{
//注入运行环境
IHostingEnvironment hostingEnvironment = hostingContext.HostingEnvironment;
//加载配置文件
config.AddJsonFile("appsettings.json", true, true).AddJsonFile(string.Format("appsettings.{0}.json", (object) hostingEnvironment.EnvironmentName), true, true);
//根据运行环境加载相应文件
if (hostingEnvironment.IsDevelopment())
{
Assembly assembly = Assembly.Load(new AssemblyName(hostingEnvironment.ApplicationName));
if (assembly != (Assembly) null)
config.AddUserSecrets(assembly, true);
}
config.AddEnvironmentVariables();
if (args == null)
return;
config.AddCommandLine(args);
}))
自定义添加配置文件请参考以上代码
第二步 读取配置信息
<code>
<Startup>
//由于在程序启动时已经配置了configuration 则可以直接通过构造方法获取配置信息
public Startup(IConfiguration configuration)
{
Configuration = configuration;
}
public IConfiguration Configuration { get; }
第三步 在Controller 获取配置信息
<code>
<Startup>
<method --> ConfigureServices>
//添加选项
services.AddOptions();
//将配置信息进行DI注入
services.Configure<AppSetting>(Configuration.GetSection(nameof(AppSetting)));
<相关方法说明>
GetSection:
key-value 取值
类似于Dictionary取值的操作
Configure:
进行DI注入
关键性代码:
//进行DI注入 AddSingleton 全局共享一个 IOptionsChangeTokenSource<TOptions> 注入参数对应的type
services.AddSingleton<IConfigureOptions<TOptions>>((IConfigureOptions<TOptions>) new NamedConfigureFromConfigurationOptions<TOptions>(name, config))
即实际上还是利用AddSingleton注入实现
<source code>
/// <summary>
/// Registers a configuration instance which TOptions will bind against. 将配置实例作为option绑定到参数上
/// </summary>
/// <typeparam name="TOptions">The type of options being configured.</typeparam>
/// <param name="services">The <see cref="T:Microsoft.Extensions.DependencyInjection.IServiceCollection" /> to add the services to.</param>
/// <param name="config">The configuration being bound.</param>
/// <returns>The <see cref="T:Microsoft.Extensions.DependencyInjection.IServiceCollection" /> so that additional calls can be chained.</returns>
public static IServiceCollection Configure<TOptions>(this IServiceCollection services, IConfiguration config) where TOptions : class
{
return services.Configure<TOptions>(Microsoft.Extensions.Options.Options.DefaultName, config);
}
/// <summary>
/// Registers a configuration instance which TOptions will bind against.同上
/// </summary>
/// <typeparam name="TOptions">The type of options being configured.</typeparam>
/// <param name="services">The <see cref="T:Microsoft.Extensions.DependencyInjection.IServiceCollection" /> to add the services to.</param>
/// <param name="name">The name of the options instance.</param>
/// <param name="config">The configuration being bound.</param>
/// <returns>The <see cref="T:Microsoft.Extensions.DependencyInjection.IServiceCollection" /> so that additional calls can be chained.</returns>
public static IServiceCollection Configure<TOptions>(this IServiceCollection services, string name, IConfiguration config) where TOptions : class
{
if (services == null)
throw new ArgumentNullException(nameof (services));
if (config == null)
throw new ArgumentNullException(nameof (config));
//进行DI注入 AddSingleton 全局共享一个 IOptionsChangeTokenSource<TOptions> 注入参数对应的type
services.AddSingleton<IOptionsChangeTokenSource<TOptions>>((IOptionsChangeTokenSource<TOptions>) new ConfigurationChangeTokenSource<TOptions>(name, config));
return services.AddSingleton<IConfigureOptions<TOptions>>((IConfigureOptions<TOptions>) new NamedConfigureFromConfigurationOptions<TOptions>(name, config));
}
<Controller>
public abstract class BaseController : Controller
{
protected AppSetting AppSetting { get; set; }
protected BaseController(IOptions<AppSetting> option) => AppSetting = option.Value;
}
intro:由于在mvc经常会使用配置信息，于是我便将获取配置信息的相关处理封装在一个抽象控制器中，故只需要在使用配置信息的控制器中继承此控制器即可
然后就可以在控制器中通过AppSetting获取配置信息了
扩展说明
在Startup中直接获取配置文件:
public Startup(IApplicationEnvironment appEnv, IHostingEnvironment env) {
_config = new ConfigurationBuilder()
.AddJsonFile("config.json")
.AddJsonFile("appsettings.json")
.AddEnvironmentVariables()
.Build();
}
[https://docs.microsoft.com/zh-cn/aspnet/core/fundamentals/configuration/?view=aspnetcore-2.1&tabs=basicconfiguration](https://docs.microsoft.com/zh-cn/aspnet/core/fundamentals/configuration/?view=aspnetcore-2.1&tabs=basicconfiguration "官方教程")
补充说明:
看见很多人说配置信息的获取不能实时更新，其实只是应用方式错了罢了
通过查看源码可以知道
《source code》
services.AddSingleton<IOptionsChangeTokenSource<TOptions>>((IOptionsChangeTokenSource<TOptions>) new ConfigurationChangeTokenSource<TOptions>(name, config));
微软实际上是有采用修改监听的
故只需要将我们控制构造中的IOptions<> 替换为 IOptionsMonitor<>即可实时读取配置信息
//读取最新值
IOptionsMonitor<>.CurrentValue
IOptionsMonitor
定义:解析
//获取最新值
TOptions CurrentValue { get; }
//通过given name获取值
TOptions Get(string name);
//当值发送改变时触发
IDisposable OnChange(Action<TOptions, string> listener);
通过定义可知IOptionsMonitor是一个类似于监听器的存在
所以应该就是通过这个来实时进行更新的
备注：其中使用的AppSetting 即 我配置信息对应的实体类 【可根据实际情况进行命名】
欢迎各位大佬评论并指出我的错误 :)
author:monster
since:6/4/2018 11:12:45 AM
direction:.net core 2.0 mvc 配置文件的使用