Updating app to use Azure Storage blob Containers instead of kentico attachment not working

Here is the code:

[assembly: RegisterModule(typeof(CustomInitializationModule))]

public class CustomInitializationModule : Module
{
    // Module class constructor, the system registers the module under the name "CustomInit"
    public CustomInitializationModule()
        : base("AzureBlobStorage")
    {
    }

    // Contains initialization code that is executed when the application starts
    protected override void OnInit()
    {
        base.OnInit();

        // Creates a new StorageProvider instance for Azure
        var mediaProvider = StorageProvider.CreateAzureStorageProvider();

        // Specifies the target container
        mediaProvider.CustomRootPath = "oewebappsblob-dev";

        // Makes the container publicly accessible
        mediaProvider.PublicExternalFolderObject = true;

        // Maps the local media library directory to the storage provider
        StorageHelper.MapStoragePath("~/MarketConnect/files/", mediaProvider);
    }
}

FYI, Gary (who posted the code above) is one of the developers working on this with me, so see the "custom Azure storage provider" code above in his comment.

Our code looks different and supports multiple sites in one instance. When we use Azure storage, we use it for all areas, not just one or two. See below:

public class CustomAzureStorage : Module
{
    public CustomAzureStorage()
        : base("CustomerName.Custom.CustomAzureStorage") { }

    protected override void OnInit()
    {
        base.OnInit();
        var sites = SiteInfo.Provider.Get().WhereEquals("SiteStatus", "RUNNING");

        // loop through all sites in this instance and create a new provider for each one
        foreach (SiteInfo site in sites)
        {
            // Creates a new StorageProvider instance for media files
            AbstractStorageProvider mediaProvider = CustomAzureStorage.CreateAzureStorageProvider();

            // Maps a directory to the provider
            string path = string.Format("/{0}/media", site.SiteName);
            StorageHelper.MapStoragePath("~" + path, mediaProvider);

            // Creates a new StorageProvider instance for files
            AbstractStorageProvider fileProvider = CustomAzureStorage.CreateAzureStorageProvider();

            string filePath = string.Format("/{0}/files", site.SiteName);
            StorageHelper.MapStoragePath("~" + filePath, fileProvider);

            // Creates a new StorageProvider instance for bizform files
            AbstractStorageProvider bizFormFileProvider = CustomAzureStorage.CreateAzureStorageProvider();

            string bizFormFilePath = string.Format("/{0}/bizformfiles", site.SiteName);
            StorageHelper.MapStoragePath("~" + bizFormFilePath, bizFormFileProvider);

            // Creates a new StorageProvider instance for smart search files
            AbstractStorageProvider smartSearchProvider = CustomAzureStorage.CreateAzureStorageProvider();
            StorageHelper.MapStoragePath("~/App_Data/CMSModules/SmartSearch", smartSearchProvider);
        }
    }

    public static AbstractStorageProvider CreateAzureStorageProvider()
    {
        // Creates a new StorageProvider instance
        AbstractStorageProvider azureStorageProvider = new StorageProvider("Azure", "CMS.AzureStorage");

        // Specifies the target container
        azureStorageProvider.CustomRootPath = ValidationHelper.GetString(SettingsHelper.AppSettings["CMSAzureRootContainer"], "");

        // Makes the container publicly accessible
        azureStorageProvider.PublicExternalFolderObject = ValidationHelper.GetBoolean(SettingsHelper.AppSettings["AzureIsStoragePublic"], false);

        return azureStorageProvider;
    }
}