Error - Operator '==' cannot be applied to operands of type 'int' and 'System.Collections.Generic.List'

Question

_{Tuesday, January 10, 2012 6:32 AM}

Please help me with this.

var cartItems = from product in tsContainer.TS_Products where product.ProductId == TSObjects.GetProductIds();

where GetProductIds() method is below

private const string PRODUCTID_ARRAY = "ProductID_Array";

        public static void AddProductId(int productId)
        {
            if (HttpContext.Current.Session[PRODUCTID_ARRAY] == null)
                HttpContext.Current.Session[PRODUCTID_ARRAY] = new List<int>();

            List<int> pArray = (List<int>)HttpContext.Current.Session[PRODUCTID_ARRAY];
            pArray.Add(productId);
        }
        public static List<int> GetProductIds()
        {
            if (HttpContext.Current.Session[PRODUCTID_ARRAY] != null)
                return (List<int>)HttpContext.Current.Session[PRODUCTID_ARRAY];
            return null;
        }

I'm getting error here "where product.ProductId == TSObjects.GetProductIds();"

Error-

Operator '==' cannot be applied to operands of type 'int' and 'System.Collections.Generic.List<int>'

All replies (7)

_{Tuesday, January 10, 2012 7:07 AM ✅Answered}

Try this code,

var cartItems = from product in tsContainer.TS_Products where TSObjects.GetProductIds().Contains(product.ProductId) select product;

I hope this helps.

Please mark this post as answer if it solved your problem. Happy Programming!

_{Tuesday, January 10, 2012 7:15 AM ✅Answered}

Priya,

Take another look at my code. You are missing 'select' at the end of query.

Please mark this post as answer if it solved your problem. Happy Programming!

_{Tuesday, January 10, 2012 6:42 AM}

You are comparing a member of type int with a object list. it is not allowed.try the below

            tsContainer.TS_Products.where(product => TSObjects.GetProductIds().Contains(product.ProductId))

Surender Singh Bhadauria

My Blog

_{Tuesday, January 10, 2012 6:50 AM}

Thank you.....

 var cartItems = from product in tsContainer.TS_Products where(product => TSObjects.GetProductIds().Contains(product.ProductId));

I'm getting error

Cannot convert lambda expression to type 'bool' because it is not a delegate type

A local variable named 'product' cannot be declared in this scope because it would give a different meaning to 'product', which is already used in a 'parent or current' scope to denote something else   

_{Tuesday, January 10, 2012 7:09 AM}

When I used this

var cartItems = from product in tsContainer.TS_Products where TSObjects.GetProductIds().Contains(product.ProductId);

Error    1    A query body must end with a select clause or a group clause  

Error    2    The type of the expression in the select clause is incorrect.  Type inference failed in the call to 'Select'.  

_{Tuesday, January 10, 2012 7:16 AM}

 var cartItems = from product in tsContainer.TS_Products where TSObjects.GetProductIds().Contains(product.ProductId) select product;

Is this correct?

_{Tuesday, January 10, 2012 7:17 AM}

Thank you guys....