爲什麼我在Membership.GetUser（）上收到網絡相關或實例特定的錯誤？電子郵件？

Question

這裏是控制方法，其中應用程序崩潰

[HttpGet] 
public ActionResult SendInvitation(Guid appointmentId) 
{ 
    if (User.Identity.IsAuthenticated) 
    { 
     var ownerEmail = Membership.GetUser().Email; //error on this line 
     _appointmentRepository.SendEmailToOwner(ownerEmail, appointmentId); 
    } 
    return Content("message sent to owner"); 
} 

每當我跑我的應用程序一切正常，數據庫讀，寫，創建用戶（使用Asp.net身份）一切工作順利。但是在控制器的方法中，當試圖獲取用戶的電子郵件時，它會崩潰。

當我爲此方法設置斷點時，它會通過User.Identity.IsAuthenticated並嘗試訪問電子郵件時崩潰。

這是錯誤是在瀏覽器所示：

A network-related or instance-specific error occurred while establishing a connection 
    to SQL Server. The server was not found or was not accessible. Verify that the instance 
    name is correct and that SQL Server is configured to allow remote connections. 
(provider: SQL Network Interfaces,error:26 - Error Locating Server/Instance Specified) 

SQLExpress database file auto-creation error: 

The connection string specifies a local Sql Server Express instance using a database location within the application's App_Data directory. The provider attempted to automatically create the application services database because the provider determined that the database does not exist. The following configuration requirements are necessary to successfully check for existence of the application services database and automatically create the application services database: 

If the application is running on either Windows 7 or Windows Server 2008R2, special configuration steps are necessary to enable automatic creation of the provider database. Additional information is available at: http://go.microsoft.com/fwlink/?LinkId=160102. If the application's App_Data directory does not already exist, the web server account must have read and write access to the application's directory. This is necessary because the web server account will automatically create the App_Data directory if it does not already exist. 
If the application's App_Data directory already exists, the web server account only requires read and write access to the application's App_Data directory. This is necessary because the web server account will attempt to verify that the Sql Server Express database already exists within the application's App_Data directory. Revoking read access on the App_Data directory from the web server account will prevent the provider from correctly determining if the Sql Server Express database already exists. This will cause an error when the provider attempts to create a duplicate of an already existing database. Write access is required because the web server account's credentials are used when creating the new database. 
Sql Server Express must be installed on the machine. 
The process identity for the web server account must have a local user profile. See the readme document for details on how to create a local user profile for both machine and domain accounts. 

堆棧跟蹤：

[SqlException (0x80131904): A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)] 
    System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction) +5352431 
    System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose) +244 
    System.Data.SqlClient.TdsParser.Connect(ServerInfo serverInfo, SqlInternalConnectionTds connHandler, Boolean ignoreSniOpenTimeout, Int64 timerExpire, Boolean encrypt, Boolean trustServerCert, Boolean integratedSecurity, Boolean withFailover) +5363103 
    System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, SecureString newSecurePassword, Boolean ignoreSniOpenTimeout, TimeoutTimer timeout, Boolean withFailover) +145 
    System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(ServerInfo serverInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString connectionOptions, SqlCredential credential, TimeoutTimer timeout) +922 
    System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(TimeoutTimer timeout, SqlConnectionString connectionOptions, SqlCredential credential, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance) +307 
    System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, SqlCredential credential, Object providerInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString userConnectionOptions, SessionData reconnectSessionData) +518 
    System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, DbConnectionPoolKey poolKey, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection, DbConnectionOptions userOptions) +5365937 
    System.Data.ProviderBase.DbConnectionFactory.CreateNonPooledConnection(DbConnection owningConnection, DbConnectionPoolGroup poolGroup, DbConnectionOptions userOptions) +38 
    System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection) +5368242 
    System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions) +146 
    System.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions) +16 
    System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource`1 retry) +94 
    System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry) +110 
    System.Data.SqlClient.SqlConnection.Open() +96 
    System.Web.Management.SqlServices.GetSqlConnection(String server, String user, String password, Boolean trusted, String connectionString) +76 

[HttpException (0x80004005): Unable to connect to SQL Server database.] 
    System.Web.Management.SqlServices.GetSqlConnection(String server, String user, String password, Boolean trusted, String connectionString) +131 
    System.Web.Management.SqlServices.SetupApplicationServices(String server, String user, String password, Boolean trusted, String connectionString, String database, String dbFileName, SqlFeatures features, Boolean install) +89 
    System.Web.Management.SqlServices.Install(String database, String dbFileName, String connectionString) +27 
    System.Web.DataAccess.SqlConnectionHelper.CreateMdfFile(String fullFileName, String dataDir, String connectionString) +386 

EDIT1： 我已經創建了自己的ApplicationUser類繼承deafult IdentityUser 即

public class ApplicationUser：IdentityUser { [必需的] public override string UserName {get;組; }

//public string Password { get; set; } 

public string FirstName { get; set; } 
public string LastName { get; set; } 

[Required] 
public string Email { get; set; } 
public Boolean IsApproved { get; set; } 

public string Company { get; set; } 
[DataType(DataType.MultilineText)] 
public string Comment { get; set; } 
[DataType(DataType.PhoneNumber)] 
public string Phone{ get; set; } 
public Boolean IsLockedOut { get; set; } 
public DateTime DateTimeRegistered { get; set; } 
public DateTime? LastLoginDateTime { get; set; } 
public DateTime? LastActivityDateTime { get; set; } 

public int PasswordFailureSinceLastSuccess { get; set; } 
public DateTime? LastPasswordFailureDate { get; set; } 
public string PasswordVerificationToken { get; set; } 
public DateTime? PasswordVerificationTokenExpirationDateTime { get; set; } 
public string ConfirmationToken { get; set; } 

public virtual ICollection<Appointment> Appointments { get; set; } 

public int LicenseId { get; set; } 
public License License { get; set; } 

}

現在，如果我找到類似_db.Users.Find(GuidID);用戶然後我得到的用戶實例與電子郵件。

這就是爲什麼當我嘗試使用默認成員來獲取電子郵件時出現錯誤的原因嗎？

Answer 1

ASP.NET身份推出了不使用成員資格提供的舊觀念全新的架構，它是你使用的是什麼，當你撥打：

var ownerEmail = Membership.GetUser().Email; 

這裏是你應該如何訪問用戶信息在ASP.NET身份。

UserManager<ApplicationUser> UserManager = new UserManager<ApplicationUser>(new UserStore<ApplicationUser>(new ApplicationDbContext()));   
var user = UserManager.FindById(User.Identity.GetUserId()); 
if (user != null) 
    _appointmentRepository.SendEmailToOwner(user.Email, appointmentId);