我有一个ASP.NET核心WebAPI项目,我正在尝试添加配置到我的IEmailServic,我通过DI注入这样：
services.AddTransient<IEmailSender,AuthMessageSender>();
AuthMessageSender的实例如何进入配置文件中的设置？
解决方法
您应该使用具有强类型配置的
options模式：
>创建您的EmailSettings强类型配置类：
public class EmailSettings
{
public string HostName { get; set; }
public string Username { get; set; }
public string Password { get; set; }
}
>更新您的appsettings.json以包含映射到您的EmailSettings配置类的配置部分：
{
"Logging": {
"IncludeScopes": false,"LogLevel": {
"Default": "Debug","System": "Information","Microsoft": "Information"
}
},"EmailSettings": {
"HostName": "myhost.com","Username": "me","Password": "mysupersecretpassword",}
}
>在Startup类的ConfigureServices调用中,将appsettings.json绑定到您的config类
public void ConfigureServices(IServiceCollection services)
{
services.Configure<MySettings>(
options => Configuration.GetSection("EmailSettings").Bind(options));
}
>在AuthMessageSender类中,注入IOptions实例< EmailSettings>进入构造函数
public class AuthMessageSender
{
private readonly EmailSettings _settings;
public AuthMessageSender(IOptions<EmailSettings> emailSettings)
{
_settings = emailSettings.Value;
// _settings.HostName == "myhost.com";
}
}
请注意,在步骤3中,您也可以使用
public void ConfigureServices(IServiceCollection services)
{
services.Configure<MySettings>(Configuration.GetSection("EmailSettings"));
}
如果在project.json中添加对Microsoft.Extensions.Options.ConfigurationExtensions的引用：
{
"dependencies": {
"Microsoft.Extensions.Options.ConfigurationExtensions": "1.0.0"
}
}
