我们以前在Asp.Net MVC中使用 System.Configuration.ConfigurationManager 来读取web.config文件。但是Asp.Net Core MVC已经没有web.config文件了,它的配置信息一般写在appsettings.json当中,那么我们怎么读取该文件呢?
在Asp.Net Core MVC中使用 Microsoft.Extensions.Options.ConfigurationExtensions 包来读取appsettings.json。具体的操作如下:
使用NuGet添加 Microsoft.Extensions.Options.ConfigurationExtensions 包到我们的项目当中,然后在appsettings.json中添加我们自己的一些配置信息
{ "Logging": { "LogLevel": { "Default": "Warning" } }, "AllowedHosts": "*", "ConnectionStrings": { "OpenAuthDBContext": "Data Source=localhost;Initial Catalog=dbname;User=sa;Password=123" }, "AppSetting": { "SSOPassport": "http://localhost:52789", "Version": "1.0", //如果为demo,则屏蔽Post请求 "DbType": "SqlServer", //数据库类型:SqlServer/MySql "MessageUrl": "http://localhot:23124", //短信平台接口 "MessageType": "CAD71325-0097-4052-9183-56F04EED0B31" //短信类型ID } }
然后我们新建一个文件AppSetting
/// <summary> /// 配置项 /// </summary> public class AppSetting { public AppSetting() { SSOPassport = "http://localhost:52789"; Version = ""; DbType = Define.DBTYPE_SQLSERVER; } /// <summary> /// SSO地址 /// </summary> public string SSOPassport { get; set; } /// <summary> /// 版本信息 /// 如果为demo,则屏蔽Post请求 /// </summary> public string Version { get; set; } /// <summary> /// 数据库类型 SqlServer、MySql /// </summary> public string DbType { get; set; } /// <summary> /// 短信平台接口Url /// </summary> public string MessageUrl { get; set; } /// <summary> /// 短信类型 /// </summary> public string MessageType { get; set; } }
接着在Startup.cs文件的ConfigureServices方法中添加
services.AddOptions(); //映射配置文件 services.Configure<AppSetting>(Configuration.GetSection("AppSetting"));
最后就可以在我们的Controller中使用了,通过IOption<AppSetting>来读取。
private readonly IOptions<AppSetting> _setting; public LoginController(IAuth authUtil,IOptions<AppSetting> setting) { _authUtil = authUtil; _setting = setting; } public string GetCaptcha(string phone) { string messageUrl = _setting.Value.MessageUrl; string messageType = _setting.Value.MessageType; if (_authUtil.GetCaptcha(phone, messageUrl, messageType)) { return JsonHelper.Instance.Serialize(new { Code = 200, Message = "" }); } return JsonHelper.Instance.Serialize(new { Code = 500, Message = "验证码获取失败,请稍后重试!" }); }
需要注意的是,通过IOption的方式不能在Startup.cs中读取appsettings.json文件,在Startup.cs中读取appsettings.json文件需要使用Microsoft.Extensions.Configuration的IConfiguration。
var dbType = ((ConfigurationSection) Configuration.GetSection("AppSetting:DbType")).Value;
或者使用
var v = Configuration["ASPNETCORE_ENVIRONMENT"]; var d = Configuration["AppSetting:MessageUrl"];
针对格式为下面的json,我么可以通过索引来获取
{ "Message": { "Message1": { "Name": "" }, "Message2": { "Name": "" } } }
_configuration["Message:0:Name"]
原文地址:https://www.cnblogs.com/jesen1315/p/11050939.html
时间: 2024-11-11 07:44:01