更新时间:2023-02-14 15:03:33
我在这里假设您在谈论绑定(应用设置文件到单个对象?)如果您可以接受一些额外的代码,那么这可以满足您想要实现的目标.
IConfigurationRoot configRoot = new ConfigurationBuilder().AddJsonFile("appsettings.json").Build();设置 settingsRoot = new Settings();//带有 appsettings 结构的自定义 POCO((IConfiguration)configRoot).Bind(settingsRoot);公开课设置{公共日志记录 { get;放;}公共字符串 AllowedHosts { 获取;放;}}公共类 LogLevel{公共字符串默认{获取;放;}公共字符串 Microsoft { get;放;}}
如果您只想设置单个节点/部分的层次结构,您可以简单地执行一个 ((IConfiguration)config.GetSection("SectionName")).Bind(myObject)
>
无论哪种方式,config.Bind(object)
都是这里的魔法部分.
I am migrating an Asp.Net MVC application to .Net5. I had a static class that served as a façade for the settings in web.config. My Setting class exposed static properties, each one of a class representing settings groups, for example:
public static class MySettings
{
public static class MainDB
{
public static string ConnectionString
{
get
{
// Code to retrieve the actual values
return "";
}
}
}
public static class ExternalApi
{
public static string Uri
{
get
{ // Code to retrieve the actual values
return "";
}
}
}
public static class OtherSettings
{
// ...
}
}
In .Net Core 5 (actually, since .Net Core 2) we use POCO's tyo read settings as depicted in https://docs.microsoft.com/en-us/aspnet/core/fundamentals/configuration/options?view=aspnetcore-5.0
Is there any way to map all my settings to one single object, for example, for appsettings.json:
{
"Logging": {
"LogLevel": {
"Default": "Information",
"Microsoft": "Warning",
"Microsoft.Hosting.Lifetime": "Information"
}
},
"AllowedHosts": "*",
"Settings": {
"MainDB": {
"ConnectionString": "whatever needed to access the db"
},
"ExtrenaAPI" {
"Uri": "https://whatever.api.com",
"Key": "mysupersecretkey",
"Secret": "mysupersecret-uh-secret"
}
}
}
Classes:
public class MainDB
{
public string ConnectionString { get; set; }
}
public class ExternalApi
{
public string Uri { get; set; }
public string Key { get; set; }
public string Secret { get; set; }
}
public class Settings
{
public MainDB MainDB { get; set; }
`public ExternalApi ExternalApi { get; set; }
}
Configuration (in Startup.cs):
services.Configure<Settings>(Configuration.GetSection("Settings"));
(Yes, I know I can do services.Configure<MainDB>(Configuration.GetSection("Settings:MainDB"));
and services.Configure<ExternalApi>(Configuration.GetSection("Settings:ExternalApi"));
but I'd like to get all the settings in one sigle object if it is possible.
Any suggestion?
Am assuming here you're talking about binding (app settings file to a single object?) If you're okay with bit of extra code then this could work for what you want to achieve.
IConfigurationRoot configRoot = new ConfigurationBuilder().AddJsonFile("appsettings.json").Build();
Settings settingsRoot = new Settings(); // custom POCO with appsettings structure
((IConfiguration)configRoot).Bind(settingsRoot);
public class Settings
{
public Logging Logging { get; set; }
public string AllowedHosts { get; set; }
}
public class LogLevel
{
public string Default { get; set; }
public string Microsoft { get; set; }
}
If you're only trying to setup a single node/section's hierarchy you can simply do a ((IConfiguration)config.GetSection("SectionName")).Bind(myObject)
Either way config.Bind(object)
is the magic bit here.