Question

I have a LINQ expression which calls another expression which also calls another expression…

public static Expression<Func<Models.Order, Models.Product,decimal?>> _ExpressionOfGetCounterValue
{
    get
    {
        var _getAmountProxy = Product._ExpressionOfGetAmount;
        var _convertQuantityProxy = Product._ExpressionOfConvertQuantity;

        Expression<Func<Models.Order, Models.Product, decimal?>> cv =
            (order,product) => (
                _getAmountProxy.Invoke(
                    order.Product,
                    _convertQuantityProxy.Invoke(order.Product,order.Quantity), 
                    order.Product.Price));

        return cv;
    }
}

public static Expression<Func<Models.Product, decimal?, decimal?>> _ExpressionOfConvertQuantity
{
    get
    {
        Expression<Func<Models.Product, decimal?, decimal?>> convertQuantity =
            (product, quantity) => ModelEntities.DoubleToDecimal(
                                       ModelEntities.DecimalToDouble(quantity.Value)
                                     * Math.Pow(10.0, ModelEntities.DecimalToDouble(product.QuantityDecimals))
                                   );

        return convertQuantity;
    }
}

When executing this, I get an error InvalidOperationException: The parameter ‘order’ was not bound in the specified LINQ to Entities query expression.

This exception comes from _convertQuantityProxy .Invoke(order.Product,order.Quantity)
How can I pass the original parameter “order” to this call ?
Please note that I use LinqKit / AsExpandable() function.

Thank you.

Answer 1

Finally I have found, I have to return
return cv.Expand();