.NET Core 配置

下面的代码演示了如何在.NET Core中使用“内存配置”：

    /// <summary>
    /// 获取格式设置
    /// </summary>
    /// <returns></returns>
    public static FormatSettings GetFormatSettings()
    {
      // Key使用冒号：分隔路径，实现层级化
      Dictionary<string, string> initialData = new Dictionary<string, string>
      {
        // 时间格式化
        ["Format:DateTime:LongDatePattern"] = "dddd, MMMM d, yyyy",
        ["Format:DateTime:LongTimePattern"] = "h:mm:ss tt",
        ["Format:DateTime:ShortDatePattern"] = "M/d/yyyy",
        ["Format:DateTime:ShortTimePattern"] = "h:mm tt",

        // 金额格式化
        ["Format:CurrencyDecimal:Digits"] = "2",
        ["Format:CurrencyDecimal:Symbol"] = "$",
      };
      var source = new MemoryConfigurationSource
      {
        InitialData = initialData
      };

      IConfiguration configuration = new ConfigurationBuilder()
              .Add(source)
              .Build().GetSection("Format");


      IOptions<FormatSettings> optionsAccessor = new ServiceCollection()
          .AddOptions()
          .Configure<FormatSettings>(configuration)
          .BuildServiceProvider()
          .GetService<IOptions<FormatSettings>>();

      FormatSettings settings = optionsAccessor.Value;

      return settings;
    }

    /// <summary>
    /// 格式设置类
    /// </summary>
    public class FormatSettings
    {
      public DateTimeFormatSettings DateTime { get; set; }
      public CurrencyDecimalFormatSettings CurrencyDecimal { get; set; }

    }

    /// <summary>
    /// 时间格式化设置
    /// </summary>
    public class DateTimeFormatSettings
    {
      public string LongDatePattern { get; set; }
      public string LongTimePattern { get; set; }
      public string ShortDatePattern { get; set; }
      public string ShortTimePattern { get; set; }
    }

    /// <summary>
    /// 货币格式化设置
    /// </summary>
    public class CurrencyDecimalFormatSettings
    {
      public int Digits { get; set; }
      public string Symbol { get; set; }
    }