在 ASP.NET Identity 2.0中获取当前用户 ID

我刚刚转向使用新的身份框架2.0版本。在1.0中，我可以通过使用 manager.FindByIdAsync(User.Identity.GetUserId())获得一个用户对象。GetUserId()方法在2.0中似乎不存在。

现在我能想到的就是使用 manager.FindByEmailAsync(User.Identity.Name)，它引用 users 表中的 username 字段。在我的应用程序中，这被设置为与电子邮件字段相同。

当有人需要更新他们的电子邮件时，我可以看到这会引起问题。在 Identity 2.0框架中，有没有一种基于不变值 (比如 id 字段)获取当前登录的用户对象的方法？

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最佳答案

GetUserId() is an extension method on IIdentity and it is in Microsoft.AspNet.Identity.IdentityExtensions. Make sure you have added the namespace with using Microsoft.AspNet.Identity;.

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In order to get CurrentUserId in Asp.net Identity 2.0, at first import Microsoft.AspNet.Identity:

C#:

using Microsoft.AspNet.Identity;

VB.NET:

Imports Microsoft.AspNet.Identity

And then call User.Identity.GetUserId() everywhere you want:

strCurrentUserId = User.Identity.GetUserId()

This method returns current user id as defined datatype for userid in database (the default is String).

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Just in case you are like me and the Id Field of the User Entity is an Int or something else other than a string,

using Microsoft.AspNet.Identity;


int userId = User.Identity.GetUserId<int>();

will do the trick

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I had the same issue. I am currently using Asp.net Core 2.2. I solved this problem with the following piece of code.

using Microsoft.AspNetCore.Identity;
var user = await _userManager.FindByEmailAsync(User.Identity.Name);

I hope this will be useful to someone.

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I used Claims to get the userId, username and email of the logged in user.

            var userId = User.FindFirstValue(ClaimTypes.NameIdentifier); // will give the user's userId
//userName = User.FindFirstValue(ClaimTypes.Name); // will give the user's userName
//email = User.FindFirstValue(ClaimTypes.Email);