Could not load file or assembly 'Oracle.ManagedDataAccess.EntityFramework

1

I'm getting this error when i want to start my asp.net web app

The given assembly name or codebase was invalid. (Exception from HRESULT: 0x80131047) 
...

Line 22:     {
Line 23:         public ApplicationDbContext()
Line 24:             : base("DefaultConnection", throwIfV1Schema: false)
Line 25:         {
Line 26:         }

Its MVC web app connected to oracle database and I used EntinyFramework 6.1.3 over NuGet,

I'm using windows 7 64-bit, V.Studio 2015 and 32-bit ODAC 12c Release 4

I tried to set in Visual studio to start in x64 or x86, doesn't help..

Please give me some advice. Thank you.

Code behind: Web.config:

<configuration>
  <configSections>
    <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
    <section name="Oracle.ManagedDataAccess.Client" type="OracleInternal.Common.ODPMSectionHandler, Oracle.ManagedDataAccess, Version=4.12.1.0.2.4, Culture=neutral, PublicKeyToken=89b483f429c47342"/>
    <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
    <sectionGroup name="devExpress">
      <section name="themes" type="DevExpress.Web.ThemesConfigurationSection, DevExpress.Web.v16.1, Version=16.1.5.0, Culture=neutral, PublicKeyToken=b88d1754d700e49a" requirePermission="false" />
      <section name="compression" type="DevExpress.Web.CompressionConfigurationSection, DevExpress.Web.v16.1, Version=16.1.5.0, Culture=neutral, PublicKeyToken=b88d1754d700e49a" requirePermission="false" />
      <section name="settings" type="DevExpress.Web.SettingsConfigurationSection, DevExpress.Web.v16.1, Version=16.1.5.0, Culture=neutral, PublicKeyToken=b88d1754d700e49a" requirePermission="false" />
      <section name="errors" type="DevExpress.Web.ErrorsConfigurationSection, DevExpress.Web.v16.1, Version=16.1.5.0, Culture=neutral, PublicKeyToken=b88d1754d700e49a" requirePermission="false" />
    </sectionGroup>
  </configSections>
  <connectionStrings>
    <add name="DefaultConnection" connectionString="Data Source=(LocalDb)\MSSQLLocalDB;AttachDbFilename=|DataDirectory|\aspnet-WebApplication1-20160811110342.mdf;Initial Catalog=aspnet-WebApplication1-20160811110342;Integrated Security=True"
      providerName="System.Data.SqlClient" />
    <add name="Model1" connectionString="DATA SOURCE=XXXXX;PERSIST SECURITY INFO=True;USER ID=XXXX"
      providerName="Oracle.ManagedDataAccess.Client"/>
    <add name="xpf.printing" connectionString="xpoprovider=MSSqlServer;data source=(localdb)\mssqllocaldb;attachdbfilename=|DataDirectory|\ReportService.mdf;integrated security=True;connect timeout=120" />
  </connectionStrings>
  ....
  <entityFramework>
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
      <parameters>
        <parameter value="mssqllocaldb" />
      </parameters>
    </defaultConnectionFactory>
    <providers>
      <provider invariantName="Oracle.ManagedDataAccess.Client" type="Oracle.ManagedDataAccess.EntityFramework.EFOracleProviderServices, Oracle.ManagedDataAccess.EntityFramework, Version=4.12.1.0.2.4, Culture=neutral, PublicKeyToken=89b483f429c47342"/>
      <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
    </providers>
  </entityFramework>
  ....
</configuration>

IdentityModels.cs :

using System.Data.Entity;
using System.Security.Claims;
using System.Threading.Tasks;
using Microsoft.AspNet.Identity;
using Microsoft.AspNet.Identity.EntityFramework;

namespace WebApplication1.Models
{
    // You can add profile data for the user by adding more properties to your ApplicationUser class, please visit http://go.microsoft.com/fwlink/?LinkID=317594 to learn more.
    public class ApplicationUser : IdentityUser
    {
        public async Task<ClaimsIdentity> GenerateUserIdentityAsync(UserManager<ApplicationUser> manager)
        {
            // Note the authenticationType must match the one defined in CookieAuthenticationOptions.AuthenticationType
            var userIdentity = await manager.CreateIdentityAsync(this, DefaultAuthenticationTypes.ApplicationCookie);
            // Add custom user claims here
            return userIdentity;
        }
    }

    public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
    {
        public ApplicationDbContext()
            : base("DefaultConnection", throwIfV1Schema: false)
        {
        }

        public static ApplicationDbContext Create()
        {
            return new ApplicationDbContext();
        }
    }
}
c#
asp.net
.net
oracle
entity-framework
asked on Stack Overflow Aug 11, 2016 by Petars • edited Aug 12, 2016 by Petars

1 Answer

1

I have the same bug and I has been fixed like this: You need change your web.config like this:

<entityFramework>
  <defaultConnectionFactory type="Oracle.ManagedDataAccess.EntityFramework.OracleConnectionFactory, Oracle.ManagedDataAccess.EntityFramework"></defaultConnectionFactory>
  <providers>
    <provider invariantName="Oracle.ManagedDataAccess.Client" type="Oracle.ManagedDataAccess.EntityFramework.EFOracleProviderServices, Oracle.ManagedDataAccess.EntityFramework, Version=6.121.2.0, Culture=neutral, PublicKeyToken=89b483f429c47342" />
    <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
  </providers>
</entityFramework>

And you need to install entityFramework 1. Install-Package EntityFramework -Version 6.1.1 2. Add reference from your link setup ODAC 12c Release 4 Oracle.ManagedDataAccess.EntityFramework.dll Oracle.ManagedDataAccess.dll to your project. It's will done

answered on Stack Overflow Jun 16, 2017 by Hong Van Vit • edited Jun 16, 2017 by Pang

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