工具：

Visual Studio 2015 update 3

Asp.Net Core 1.0

1 準備工作

申請微信公眾平臺接口測試帳號，申請網址：（http://mp.weixin.qq.com/debug/cgi-bin/sandbox?t=sandbox/login）。申請接口測試號無需公眾帳號，可以直接體驗和測試公眾平臺所有高級接口。

1.1 配置接口信息

1.2 修改網頁授權信息

點擊“修改”后在彈出頁面填入你的網站域名：

2 新建網站項目

2.1 選擇ASP.NET Core Web Application 模板

2.2 選擇Web 應用程序，并更改身份驗證為個人用戶賬戶

3 集成微信登錄功能

3.1添加引用

打開project.json文件，添加引用Microsoft.AspNetCore.Authentication.OAuth

3.2 添加代碼文件

在項目中新建文件夾，命名為WeChatOAuth，并添加代碼文件（本文最后附全部代碼）。

3.3 注冊微信登錄中間件

打開Startup.cs文件，在Configure中添加代碼：

app.UseWeChatAuthentication(new WeChatOptions(){ AppId = "******", AppSecret = "******"});

注意該代碼的插入位置必須在app.UseIdentity()下方。

4 代碼

WeChatAppBuilderExtensions.cs：

// Copyright (c) .NET Foundation. All rights reserved.// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.using System;using Microsoft.AspNetCore.Authentication.WeChat;using Microsoft.Extensions.Options;namespace Microsoft.AspNetCore.Builder{ /// <summary> /// Extension methods to add WeChat authentication capabilities to an HTTP application pipeline. /// </summary> public static class WeChatAppBuilderExtensions {  /// <summary>  /// Adds the <see cref="WeChatMiddleware"/> middleware to the specified <see cref="IApplicationBuilder"/>, which enables WeChat authentication capabilities.  /// </summary>  /// <param name="app">The <see cref="IApplicationBuilder"/> to add the middleware to.</param>  /// <returns>A reference to this instance after the operation has completed.</returns>  public static IApplicationBuilder UseWeChatAuthentication(this IApplicationBuilder app)  {   if (app == null)   {    throw new ArgumentNullException(nameof(app));   }   return app.UseMiddleware<WeChatMiddleware>();  }  /// <summary>  /// Adds the <see cref="WeChatMiddleware"/> middleware to the specified <see cref="IApplicationBuilder"/>, which enables WeChat authentication capabilities.  /// </summary>  /// <param name="app">The <see cref="IApplicationBuilder"/> to add the middleware to.</param>  /// <param name="options">A <see cref="WeChatOptions"/> that specifies options for the middleware.</param>  /// <returns>A reference to this instance after the operation has completed.</returns>  public static IApplicationBuilder UseWeChatAuthentication(this IApplicationBuilder app, WeChatOptions options)  {   if (app == null)   {    throw new ArgumentNullException(nameof(app));   }   if (options == null)   {    throw new ArgumentNullException(nameof(options));   }   return app.UseMiddleware<WeChatMiddleware>(Options.Create(options));  } }}