Asp net 5 mvc 6 add permission for facebook email

Introduction

ASP.NET is a popular language used for web applications. In this article, we will explore how to add permission for email in an ASP.NET 5 MVC 6 application.

Step 1: Create a Facebook App

The first step is to create a Facebook app. Go to the Facebook Developers website and create a new app. Once you have created the app, you will be provided with an App ID and an App Secret.

Step 2: Install the Facebook SDK

To integrate Facebook login into your ASP.NET application, you need to install the Facebook SDK. You can do this by adding the following package to your project:

Install-Package Facebook

Step 3: Configure Facebook Authentication

Next, you need to configure Facebook authentication in your ASP.NET application. Open the Startup.cs file and add the following code to the ConfigureServices method:

services.AddAuthentication()
    .AddFacebook(options =>
    {
        options.AppId = "YourAppId";
        options.AppSecret = "YourAppSecret";
        options.Scope.Add("email");
    });

“YourAppId” and “YourAppSecret” with the App ID and App Secret you obtained from the Facebook Developers website.

Step 4: Add Facebook Login Button

Now, you can add a Facebook login button to your ASP.NET application. Open the Login.cshtml file and add the following code:

Step 5: Facebook Callback

When a user on the Facebook login button, they will be redirected to Facebook for authentication. After successful authentication, Facebook will redirect the user back to your application. You need to handle this callback in your ASP.NET application. Open the AccountController.cs file and add the following code:

Step 6: Retrieve Facebook Email

To retrieve the user's Facebook email, you can use the Facebook Graph API. Add the following code to the ExternalLoginCallback method:

var info = await _signInManager.GetExternalLoginInfoAsync();
var accessToken = info.AuthenticationTokens.First().Value;
var facebookClient = new FacebookClient(accessToken);
dynamic  = await facebookClient.GetTaskAsync("me", new { fields = "email" });
var email = result.email;

Step 7: Save Facebook Email

Finally, you can save the user's Facebook email in your ASP.NET application. Add the following code to the ExternalLoginCallback method:

var user = new ApplicationUser { UserName = email, Email = email };
var result = await _userManager.CreateAsync(user);
if (result.Succeeded)
{
    await _signInManager.SignInAsync(user, isPersistent: );
    return ("Index", "Home");
}

Conclusion

In this article, we have learned how to add permission for Facebook email in an ASP.NET 5 MVC 6 application. By following the steps outlined above, you can integrate Facebook login into your ASP.NET application and retrieve the user's email for further processing.

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