为什么Visual Studio告诉我未定义AddJsonFile()方法? [英] Why does Visual Studio tell me that the AddJsonFile() method is not defined?

问题描述

我正在使用VS Ultimate 2015 Preview开发ASP.NET 5 WebAPI项目.我正在尝试以这种方式配置应用程序(行号只是指南):

I'm developing an ASP.NET 5 WebAPI project using VS Ultimate 2015 Preview. I'm trying to configure the app in this way (line numbers are just guides):

1 using Microsoft.Framework.ConfigurationModel;
2
3 public IConfiguration Configuration { get; private set; }
4 
5 public Startup()
6 {
7     Configuration = new Configuration()
8         .AddJsonFile("config.json")
9         .AddEnvironmentVariables();
10 }

第8行给我一个错误:配置"不包含"AddJsonFile"的定义...

Line 8 gives me an error: 'Configuration' does not contain a definition for 'AddJsonFile'...

怎么了?

推荐答案

您需要包含 Microsoft.Extensions.Configuration.Json NuGet包，如果您想调用.AddJsonFile()方法.

请参阅: https://github.com/aspnet/Configuration/tree/dev/src/Microsoft.Framework.ConfigurationModel.Json

要进一步阅读，这里有一个不错的教程:

For further reading, here's a nice tutorial: ASP.NET vNext Moving Parts: IConfiguration.

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