public static IConfigurationBuilder AddCacheFile(this IConfigurationBuilder builder, IFileProvider provider, string path, string basePath, bool optional, bool reloadOnChange)
{
Check.NotNull(builder, "builder");
//获取一个环境变量的路径
Check.CheckCondition(() => string.IsNullOrEmpty(path), "path");
path = CPlatform.Utilities.EnvironmentHelper.GetEnvironmentVariable(path);
if (provider == null && Path.IsPathRooted(path))
{
provider = new PhysicalFileProvider(Path.GetDirectoryName(path));
path = Path.GetFileName(path);
}
//建立CacheConfigurationSource类，此类继承了FileConfigurationSource接口，并重写加入了json转换方法
var source = new CacheConfigurationSource
{
FileProvider = provider,
Path = path,
Optional = optional,
ReloadOnChange = reloadOnChange
};
builder.Add(source);
if (!string.IsNullOrEmpty(basePath))
{
builder.SetBasePath(basePath);
}
AppConfig.Path = path;
AppConfig.Configuration = builder.Build();
return(builder);
}
public CacheConfigurationProvider(CacheConfigurationSource source) : base(source)
{
}