dotConnect for Oracle Documentation
Using Entity Framework Implementation of ASP.NET Identity 1 for Oracle
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ASP.NET Identity is a new system of user authentication and authorization, that continues the evolution of ASP.NET membership system, and is used in the Visual Studio 2013 project templates for ASP.NET MVC, Web Forms, Web API and SPA. You can read more on ASP.NET Identity in Microsoft documentation.

dotConnect for Oracle enables you to employ an implementation of ASP.NET Identity for Oracle database using either ADO.NET or Entity Framework functionality in your web applications. This allows you to use such ASP.NET Identity benefits as unit-testable user authentication system, social login support, OWIN integration, etc. This tutorial demonstrates creating an Entity Framework implementation of ASP.NET Identity.

To complete this tutorial you need Visual Studio 2013 installed.

In order to create an ASP.NET MVC 5 application using dotConnect for Oracle for storing identity information, perform the following steps:

  1. In the Add New Project dialog box expand Visual C# on the left, then Web, and then select ASP.NET Web Application. Name your project, for example, "AspNet_Identity_Application" and then click OK.

    Add New Project dialog box
  2. In the New ASP.NET Project dialog box, select the MVC template with the default options (that includes Individual User Accounts as authentication method) and click OK.

    New ASP.NET Project dialog box

  3. Add references to the necessary dotConnect for Oracle assemblies:

    • Devart.Data.dll
    • Devart.Data.Oracle.dll
    • Devart.Data.Oracle.Entity.EF6.dll

    You need to add the last file from the Entity\EF6 subfolder of the dotConnect for Oracle installation folder. Or you may add it from the GAC.

  4. In the web.config file of your project, replace the default connection string with your Oracle one.

    <add name="DefaultConnection" connectionString="User Id=Scott;Password=tiger;Data Source=Ora;" providerName="Devart.Data.Oracle" />
    	
  5. Register the Entity Framework provider in the <providers> section of the web.config file

    Before the registration:

    	<providers>
    	  <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
    	</providers>
    	

    After the registration:

    	<providers>
    	  <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
    	  <provider invariantName="Devart.Data.Oracle" type="Devart.Data.Oracle.Entity.OracleEntityProviderServices, Devart.Data.Oracle.Entity.EF6, Version=8.4.215.0, Culture=neutral, PublicKeyToken=09af7300eec23701" />	
    	</providers>
    	

    Note: replace "8.4.215.0" with the actual version.

  6. Open the IdentityModels.cs file from the Models project folder.
  7. Add the following namespaces to the using list:

    C#csharpCopy Code
    using System.Data.Entity;
    using System.Data.Entity.Migrations;
    
    Visual BasicCopy Code
    Imports System.Data.Entity
    Imports System.Data.Entity.Migrations
    
  8. Add the new Configuration class and register the dotConnect for Oracle provider SQL generator for Code-First Migrations.

    C#csharpCopy Code
    	internal class Configuration : DbMigrationsConfiguration<ApplicationDbContext>
    	{
    		public Configuration()
    		{
    			AutomaticMigrationsEnabled = true;
    			SetSqlGenerator("Devart.Data.Oracle", new Devart.Data.Oracle.Entity.Migrations.OracleEntityMigrationSqlGenerator());
    		}
    	}
    
    Visual BasicCopy Code
    	Friend Class Configuration
    		Inherits DbMigrationsConfiguration(Of ApplicationDbContext)
    		Public Sub New()
    			AutomaticMigrationsEnabled = True
    			SetSqlGenerator("Devart.Data.Oracle", New Devart.Data.Oracle.Entity.Migrations.OracleEntityMigrationSqlGenerator())
    		End Sub
    	End Class
    
  9. Extend the ApplicationDbContext class code.

    We need to add a static constructor setting the database initializer for the context. Additionally we need to set the TruncateLongDefaultNames option of dotConnect for Oracle Entity Framework provider to true in order for foreign key names to be generated correctly because of Oracle 30 character limitation for foreign key names.

    After this we also need to add the OnModelCreating method, where we change type for character properties that aren't a part of entity key (they are filtered by their names) from the NCLOB data type to NVARCHAR(256) via a lightweight convention.

    The code before editing:

    C#csharpCopy Code
    	public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
    	{
    		public ApplicationDbContext()
    			: base("DefaultConnection")
    		{
    		}
    	}
    
    Visual BasicCopy Code
    	Public Class ApplicationDbContext
    		Inherits IdentityDbContext(Of ApplicationUser)
    		Public Sub New()
    			MyBase.New("DefaultConnection")
    		End Sub
    	End Class
    

    The code after editing:

    C#csharpCopy Code
    	public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
    	{
    		public ApplicationDbContext()
    			: base("DefaultConnection")
    		{
    		}
    
    		static ApplicationDbContext()
    		{
    			var config = Devart.Data.Oracle.Entity.Configuration.OracleEntityProviderConfig.Instance;
    			config.CodeFirstOptions.TruncateLongDefaultNames = true;
    
    			Database.SetInitializer(new MigrateDatabaseToLatestVersion<ApplicationDbContext, Configuration>());
    		}
    
    		protected override void OnModelCreating(DbModelBuilder modelBuilder)
    		{
    
    			base.OnModelCreating(modelBuilder);
    
    			modelBuilder
    			  .Properties()
    			  .Where(p => p.PropertyType == typeof(string) &&
    						  !p.Name.Contains("Id") &&
    						  !p.Name.Contains("Provider"))
    			  .Configure(p => p.HasMaxLength(256));
    		}
    
    	}
    
    Visual BasicCopy Code
    	Public Class ApplicationDbContext
    		Inherits IdentityDbContext(Of ApplicationUser)
    		Public Sub New()
    			MyBase.New("DefaultConnection")
    		End Sub
    
    		Shared Sub New()
    			Dim config = Devart.Data.Oracle.Entity.Configuration.OracleEntityProviderConfig.Instance
    			config.CodeFirstOptions.TruncateLongDefaultNames = True
    
    			Database.SetInitializer(New MigrateDatabaseToLatestVersion(Of ApplicationDbContext, Configuration)())
    		End Sub
    
    		Protected Overrides Sub OnModelCreating(modelBuilder As DbModelBuilder)
    
    			MyBase.OnModelCreating(modelBuilder)
    
    			modelBuilder.Properties().Where(Function(p) p.PropertyType = GetType(String) AndAlso Not _
    				p.Name.Contains("Id") AndAlso Not p.Name.Contains("Provider")).Configure(Function(p) _
    				p.HasMaxLength(256))
    		End Sub
    	End Class
    

Checking Application

Now we can run our application and check if everything works correctly.

  1. Run the application by pressing CTRL+F5.

    Getting started page
  2. Switch to the Register tab on the top of the page.

    Registration page
  3. Enter a new user name and password to the corresponding boxes and click the Register button.
  4. The new user is now registered and logged in, and the ASP.NET Identity tables are created in the Oracle database.

    User is registered
  5. After this you may use an appropriate database tool to connect to the database where the user data is stored and verify that the data is stored correctly.

See Also

Using ADO.NET Implementation of ASP.NET Identity 1 for Oracle  | Using Entity Framework Implementation of ASP.NET Identity 2 for Oracle  | Using ADO.NET Implementation of ASP.NET Identity 2 for Oracle  | Using Entity Framework Core Implementation of ASP.NET Core Identity for Oracle