但是当我发布了Windows AZURE云和sql Azure的MVC应用程序时，它给出了下面提到的错误。

>为什么这个错误只返回sql Azure(使用桌面sql Server 2008)？
>如何摆脱这个？

我的存储库代码示例如下所示。下面提到的错误在调用时出现
Catalog.SaveChanges()方法。

using (var catalog = new DataCatalog())
{
    var retailSaleReturn = new RetailSaleReturn
    {
        ReturnQuantity = returnQuantity,Product = saleDetailObj.Product,Owner = owner,Provider = provider,};

    //add to context
    Catalog.RetailSaleReturns.Add(retailSaleReturn);

    //save for db
    Catalog.SaveChanges();
}

DbUpdateException如下所示：

{"An error occurred while saving entities that do not expose foreign key properties for their relationships. The EntityEntries property will return null because a single entity cannot be identified as the source of the exception. Handling of exceptions while saving can be made easier by exposing foreign key properties in your entity types. See the InnerException for details."}

InnerException如下所示：

{"Tables without a clustered index are not supported in this version of sql Server. Please create a clustered index and try again."}

StackTrace如下所示

at System.Data.Entity.Internal.InternalContext.SaveChanges()
   at PawLoyalty.Data.Repositories.CustomersRepository.ReturnRetailOnlySales(Guid saleDetailId,Int32 returnQuantity,String providerKey,String ownerKey) in D:\PawLoyalty Module\PawLoyalty\PawLoyalty\PawLoyalty.Data\Repositories\CustomersRepository.cs:line 550
   at PawLoyalty.Web.Areas.Providers.Controllers.CustomersController.ReturnRetailOnlySales(String providerKey,String ownerKey,String petKey,Guid saleDetailId,Int32 returnQuantity) in D:\PawLoyalty Module\PawLoyalty\PawLoyalty\PawLoyalty.Web\Areas\Providers\Controllers\CustomersController.cs:line 942
   at lambda_method(Closure,ControllerBase,Object[] )
   at System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext,IDictionary`2 parameters)
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext,ActionDescriptor actionDescriptor,IDictionary`2 parameters)
   at System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClassd.<InvokeActionMethodWithFilters>b__a()
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter,ActionExecutingContext preContext,Func`1 continuation)