不确定我在这里错过了什么，但我无法从我的应用程序设置中获得值。Json在我的。net核心应用程序。我有我的appsettings。json:
{
"AppSettings": {
"Version": "One"
}
}
启动:
public class Startup
{
private IConfigurationRoot _configuration;
public Startup(IHostingEnvironment env)
{
_configuration = new ConfigurationBuilder()
}
public void ConfigureServices(IServiceCollection services)
{
//Here I setup to read appsettings
services.Configure<AppSettings>(_configuration.GetSection("AppSettings"));
}
}
模型:
public class AppSettings
{
public string Version{ get; set; }
}
控制器:
public class HomeController : Controller
{
private readonly AppSettings _mySettings;
public HomeController(IOptions<AppSettings> settings)
{
//This is always null
_mySettings = settings.Value;
}
}
_mySettings总是空的。我是不是遗漏了什么?
假设在appsettings.json中有这样的值。
"MyValues": {
"Value1": "Xyz"
}
方法一:不进行依赖注入
在.cs文件中:
static IConfiguration conf = (new ConfigurationBuilder().SetBasePath(Directory.GetCurrentDirectory()).AddJsonFile("appsettings.json").Build());
public static string myValue1= conf["MyValues:Value1"].ToString();
方法二:依赖注入(推荐)
在Startup.cs文件:
public IConfiguration Configuration { get; }
public Startup(IConfiguration configuration)
{
Configuration = configuration;
}
public void ConfigureServices(IServiceCollection services)
{
...
services.AddServices(Configuration);
}
在你的控制器中:
public class TestController : ControllerBase
{
private string myValue1 { get; set; }
public TestController(IConfiguration configuration)
{
this.myValue1 = configuration.GetValue<string>("MyValues:Value1");
}
}
这里是一个关于。net框架和Core: web的抽象。Config, app.config和appsettings.json
static SafeDictionary<string, string> _appSettings;
public static SafeDictionary<string, string> AppSettings {
get {
if (_appSettings == null)
{
_appSettings = ConfigurationManager.AppSettings
.ToDictionary()
.ToSafe();
BuildAppSettings( JsonAppSettings, "");
}
return _appSettings;
}
}
static SafeDictionary<string, string> _connectionStrings;
public static SafeDictionary<string, string> ConnectionStrings
{
get
{
if (_connectionStrings == null)
{
_connectionStrings = ConfigurationManager.ConnectionStrings
.Cast<ConnectionStringSettings>()
.ToDictionary(x => x.Name, x => x.ConnectionString)
.ToSafe();
foreach (var jp in JsonAppSettings["ConnectionStrings"].Cast<JProperty>())
_connectionStrings.Add(jp.Name, jp.Value.ToString() );
}
return _connectionStrings;
}
}
https://github.com/bitministry/common
只需创建一个AnyName.cs文件并粘贴以下代码。
using System;
using System.IO;
using Microsoft.Extensions.Configuration;
namespace Custom
{
static class ConfigurationManager
{
public static IConfiguration AppSetting { get; }
static ConfigurationManager()
{
AppSetting = new ConfigurationBuilder()
.SetBasePath(Directory.GetCurrentDirectory())
.AddJsonFile("YouAppSettingFile.json")
.Build();
}
}
}
必须替换YouAppSettingFile。Json文件名与您的文件名。
您的.json文件应该如下所示。
{
"GrandParent_Key" : {
"Parent_Key" : {
"Child_Key" : "value1"
}
},
"Parent_Key" : {
"Child_Key" : "value2"
},
"Child_Key" : "value3"
}
现在你可以使用它了。
不要忘记在你想要使用的类中添加引用。
using Custom;
检索值的代码。
string value1 = ConfigurationManager.AppSetting["GrandParent_Key:Parent_Key:Child_Key"];
string value2 = ConfigurationManager.AppSetting["Parent_Key:Child_Key"];
string value3 = ConfigurationManager.AppSetting["Child_Key"];
appsetting.json
{
"Settings": {
"ProjectName": "Sample Project"
}
}
定义一个具有相同属性名的类:
public class Settings
{
public string ProjectName { get; set; }
}
在Startup.cs中添加配置:
public void ConfigureServices(IServiceCollection services)
{
services.Configure<Settings>(Configuration.GetSection("Settings"));
}
注入控制器:
public class TestController : Controller
{
private readonly Settings _settings;
public TestController(IOptions<Settings> settings)
{
_settings = settings.Value;
}
[AllowAnonymous]
public async Task<IActionResult> test()
{
var _projectname = _settings.ProjectName;
return View();
}
}
亚比谢克的回答是:
如果你想将值导入到静态类中，那么只需使用(ReSharper推荐):
static IConfiguration conf = (JsonConfigurationExtensions.AddJsonFile(new ConfigurationBuilder().SetBasePath(Directory.GetCurrentDirectory()), "appsettings.json").Build());
private static string AuthorizationServiceURL { get; } = conf["ServiceUrls:AuthorizationUrl"];
// appsettings.json
{
"ServiceUrls": {
"AuthorizationUrl": "https://example.com/authorize"
}
}
