ASP.Net Identity在每个请求上运行多个查询

Question

ASP.Net Identity正在对每个请求执行以下查询.我没有更改创建MVC项目时生成的任何身份代码.我的Startup.Auth.cs代码如下.

请注意,validateInterval设置为TimeSpan.FromMinutes(30).另请注意,Cookie expiration正在显式设置(ExpireTimeSpan)设置为TimeSpan.FromMinutes(30).我在SO上发现了一个类似的问题,其回答表明TimeSpan.FromMinutes(30)应该足以阻止ASP.Net Identity在每次请求时联系DB.

我在这里错过了什么？

Startup.Auth.cs

public partial class Startup
{
 public void ConfigureAuth(IAppBuilder app)
 {
  // Configure the db context, user manager and signin manager to use a single instance per request
  app.CreatePerOwinContext(ApplicationDbContext.Create);
  app.CreatePerOwinContext < ApplicationUserManager > (ApplicationUserManager.Create);
  app.CreatePerOwinContext < ApplicationSignInManager > (ApplicationSignInManager.Create);

  // Enable the application to use a cookie to store information for the signed in user
  // and to use a cookie to temporarily store information about a user logging in with a third party login provider
  // Configure the sign in cookie
  app.UseCookieAuthentication(new CookieAuthenticationOptions
  {
   AuthenticationType = DefaultAuthenticationTypes.ApplicationCookie,
    LoginPath = new PathString("/Account/Login"),
    Provider = new CookieAuthenticationProvider
    {
     // Enables the application to validate the security stamp when the user logs in.
     // This is a security feature which is used when you change a password or add an external login to your account.  
     OnValidateIdentity = SecurityStampValidator
      .OnValidateIdentity < ApplicationUserManager, ApplicationUser > (
       validateInterval: TimeSpan.FromMinutes(30),
       regenerateIdentity: (manager, user) => user.GenerateUserIdentityAsync(manager)),
    }
    SlidingExpiration = true,
    ExpireTimeSpan = TimeSpan.FromMinutes(30)
  });
  app.UseExternalSignInCookie(DefaultAuthenticationTypes.ExternalCookie);

  // Enables the application to temporarily store user information when they are verifying the second factor in the two-factor authentication process.
  app.UseTwoFactorSignInCookie(DefaultAuthenticationTypes.TwoFactorCookie, TimeSpan.FromMinutes(5));

  // Enables the application to remember the second login verification factor such as phone or email.
  // Once you check this option, your second step of verification during the login process will be remembered on the device where you logged in from.
  // This is similar to the RememberMe option when you log in.
  app.UseTwoFactorRememberBrowserCookie(DefaultAuthenticationTypes.TwoFactorRememberBrowserCookie);
 }
}

正在对每个请求执行的查询(标准ASP.Net标识查询)

exec sp_executesql N'SELECT 
    [Extent1].[Id] AS [Id], 
    [Extent1].[Email] AS [Email], 
    [Extent1].[EmailConfirmed] AS [EmailConfirmed], 
    [Extent1].[PasswordHash] AS [PasswordHash], 
    [Extent1].[SecurityStamp] AS [SecurityStamp], 
    [Extent1].[PhoneNumber] AS [PhoneNumber], 
    [Extent1].[PhoneNumberConfirmed] AS [PhoneNumberConfirmed], 
    [Extent1].[TwoFactorEnabled] AS [TwoFactorEnabled], 
    [Extent1].[LockoutEndDateUtc] AS [LockoutEndDateUtc], 
    [Extent1].[LockoutEnabled] AS [LockoutEnabled], 
    [Extent1].[AccessFailedCount] AS [AccessFailedCount], 
    [Extent1].[UserName] AS [UserName]
    FROM [dbo].[AspNetUsers] AS [Extent1]
    WHERE [Extent1].[Id] = @p0',N'@p0 nvarchar(4000)',@p0=N'[ID]'

exec sp_executesql N'SELECT 
    [Extent1].[Id] AS [Id], 
    [Extent1].[UserId] AS [UserId], 
    [Extent1].[ClaimType] AS [ClaimType], 
    [Extent1].[ClaimValue] AS [ClaimValue]
    FROM [dbo].[AspNetUserClaims] AS [Extent1]
    WHERE [Extent1].[UserId] = @p__linq__0',N'@p__linq__0 nvarchar(4000)',@p__linq__0=N'[ID]'

exec sp_executesql N'SELECT 
    [Extent1].[LoginProvider] AS [LoginProvider], 
    [Extent1].[ProviderKey] AS [ProviderKey], 
    [Extent1].[UserId] AS [UserId]
    FROM [dbo].[AspNetUserLogins] AS [Extent1]
    WHERE [Extent1].[UserId] = @p__linq__0',N'@p__linq__0 nvarchar(4000)',@p__linq__0=N'[ID]'

exec sp_executesql N'SELECT 
    [Extent1].[UserId] AS [UserId], 
    [Extent1].[RoleId] AS [RoleId]
    FROM [dbo].[AspNetUserRoles] AS [Extent1]
    WHERE [Extent1].[UserId] = @p__linq__0',N'@p__linq__0 nvarchar(4000)',@p__linq__0=N'[ID]'

编辑

我确实做了一个我忘记提及的改变.我们将与身份相关的表移动到SQL DB.更改如下:

public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
{
    // Changed connection string name
    public ApplicationDbContext()
        : base("MaestroConnection", throwIfV1Schema: false)
    {
    }

    public static ApplicationDbContext Create()
    {
        return new ApplicationDbContext();
    }
}

Answer 1

好吧，这让我感觉有点愚蠢。在单步执行代码并注意到它regenerateIdentity: (manager, user) => user.GenerateUserIdentityAsync(manager))被正确调用并且没有重复调用之后，我做了一些进一步的挖掘。

在导航菜单部分视图中，我发现了这行代码：

<a href="#" class="nav-link dropdown-toggle">@("@" + 
            ApplicationUser.CurrentUser.Email.Split('@')[0])</a>

在每次页面加载时执行该代码都会导致运行上述 4 个查询。总台。