"Selfless sharing: ASP. NET CORE Project Combat (sixth)" Read the configuration file (i) Appsettings.json

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Brief introduction

In our previous ASP. NET MVC development, when it comes to configuration files, we don't think of web. config and App. Config, in the core we see a lot of changes, the new configuration system appears to be more lightweight, has better extensibility, and supports a variety of data sources.

Blog Park for this explanation a lot, such as: Artche, but, there is no point to see the old a blog or some difficult, for the old a introduction of the configuration, I also look at the confused, in the following article, I will use like our rookie easy to accept the way, re-explain.

Today, we take Appsettings.json as an example to read some simple system configurations.

Appsettings.json

In Chapter Two, we add services in Startup.cs when we talk about EF online. adddbcontext<applicationdbcontext> (options = options. Usesqlserver (configuration.getconnectionstring ("sqlserverconnection")); Already used to Appsettings.json.

Let's add some simple system configuration to demonstrate the read Appsettings.json:

　　

{
"Applicationinsights": {
"Instrumentationkey": ""
},
"ConnectionStrings": {
"Sqlserverconnection": "Server=.;D ATABASE=DB_WKMVC; User Id=sa_wkmvc; password=123456; "
},
"Logging": {
"Includescopes": false,
"LogLevel": {
"Default": "Debug",
"System": "Information",
"Microsoft": "Information"
}
},
"ApplicationConfiguration": {
File Upload Path
"Fileuppath": "/upload/",
Whether to enable single-user sign-on
"Issinglelogin": "True",
Allow upload of file formats
"Attachextension": "Gif,jpg,jpeg,png,bmp,rar,zip,doc,docx,xls,xlsx,ppt,pptx,txt,flv,apk,mp4,mpg,ts,mpeg,mp3,bak , pdf ",
Picture Upload max kb
"Attachimagesize": 12400
}
}

We add a configuration class ApplicationConfiguration

1 public class ApplicationConfiguration 2     {3         #region attribute member 4  5//         <summary> 6//         File upload path 7
   
    ///</summary> 8 Public         string Fileuppath {get; set;} 9         //<summary>10//Whether single-user login is enabled         // /</summary>12 Public         bool Issinglelogin {get; set;} ///<SUMMARY>14///         </summary>16 public         string Attachextension { Get Set }17///<SUMMARY>18///         image upload maximum KB19//         </summary>20 public         int Attachimagesize {get ; Set }21         #endregion22     }
   

Added in Startup.cs's configureservices

Services. Configure<applicationconfiguration> (Configuration.getsection ("applicationconfiguration"));

　　

Add a domain layer appconfigurtaionservices

public class Appconfigurtaionservices
{
Private ReadOnly ioptions<applicationconfiguration> _appconfiguration;
Public appconfigurtaionservices (ioptions<applicationconfiguration> appconfiguration)
{
_appconfiguration = appconfiguration;
}

Public ApplicationConfiguration Appconfigurations
{
Get
{
return _appconfiguration.value;
}
}
}

Add reference using Microsoft.Extensions.Options;

　　

Let's test it out:

　　

Test results:

　　

I want to learn from you. ASP.

Just beginning to contact, the level is limited, a lot of things are their own understanding and flipping through the online god of information, if there are wrong places and do not understand the place, I hope you correct!

Although ASP. NET Core is now very hot, but many of the online information is the copy of the previous article, so there are a lot of problems I have not resolved, I hope we can help together!

"Selfless sharing: ASP. NET CORE Project Combat (sixth)" Read the configuration file (i) Appsettings.json