Runtime Exception on Azure Functions with Entity Framework

Hi, Team.

I’ve got an issue with running Azure Functions that references to EntityFramework. Here’s my SO Question:

http://stackoverflow.com/questions/40671391/azure-functions-with-entity-framework

I referenced an external assembly that are working perfectly fine on my existing application. This is actual implementation of EntityFramework for my database. When you have a look at the SO question above, I provided the complete code, project.json, and exception log details. Of course I copied the external assembly into the bin directory.

Can anyone have a look, please?

[rndthoughts]

@govindsyadv - thanks, that works! So I assumed that by adding the Entity Framework package to the nuget file in my Functions project it would be enough for my satellite assembly to pick it up. But it isn’t, I need to copy the EF dll and all the other dll’s my satellite needs for operation. So I just greated a gulp file to copy all of them into the bin folder for my function.

Hopefully references will be something coming soon in the tooling.

[govindsyadv]

Hi ,

I am using the EF6 and it is working successfully . Apart from efconnection builder , you also need to copy the ef6 dll in the shared/bin folder and refer the dll / import in your csx file .

These are the snippets of my working code .

public MYDBContext() : base(GetConnectionString()) { }

    private static string GetConnectionString()

    {

        const string providerName = "System.Data.SqlClient";
        const string metadata = @"res://*/MYDB.csdl|res://*/MYDB.ssdl|res://*/MYDB.msl";

        string connectString = ConfigurationManager.ConnectionStrings["MYDBContext"].ToString();


        // Initialize the connection string builder for the
        // underlying provider.
        SqlConnectionStringBuilder sqlBuilder = new SqlConnectionStringBuilder(connectString);

        // Set the properties for the data source.
        //sqlBuilder.IntegratedSecurity = true;
        sqlBuilder.MultipleActiveResultSets = true;

        // Build the SqlConnection connection string.
        string providerString = sqlBuilder.ToString();

        // Initialize the EntityConnectionStringBuilder.
        EntityConnectionStringBuilder entityBuilder = new EntityConnectionStringBuilder();

        //Set the provider name.
        entityBuilder.Provider = providerName;

        // Set the provider-specific connection string.
        entityBuilder.ProviderConnectionString = providerString;

        // Set the Metadata location.
        entityBuilder.Metadata = metadata;

        return entityBuilder.ConnectionString;

    }

here the connection string is set in application settings .

on csx part

using System.Data.Entity; using System.Data.Entity.Infrastructure; using System.Data.Entity.Core.Objects; using System.Data.Entity.ModelConfiguration.Conventions;

using System; using System.Collections.Generic; using System.Linq; using System.Linq.Expressions; using System.Net; using System.Configuration; using System.IO; using System.Net.Mail;

using Newtonsoft.Json.Linq; using Newtonsoft.Json;

public static void Run(string myQueueItem, TraceWriter log) {

       try
{

//MYDBcontext is being set in application settings on azurefunctions with the connectionstring as value log.Info(GetConnectionStringVariable(“MYDBContext”)); } catch (System.Exception ex) { log.Info($“Error Occured : {ex}”); throw ex; }

}

public static string GetConnectionStringVariable(string name) {

return ConfigurationManager.ConnectionStrings[name].ConnectionString;

}

and in the shared folder place these two dlls EntityFramework.dll EntityFramework.SqlServer.dll

Thanks