Question

Afternoon,

I am getting the following error, and cant work out why… Can some one please take a look and let me know where i am going wrong.

Cannot implicitly convert type ‘System.Collections.Generic.List’ to ‘System.Collections.Generic.List’

below is what i am trying to use, to get a list back so i can use it with Amazon. I have tried to remove the .ToList() bit but nothing seems to work. I am calling an MS SQL view “GetASINForUpdateLowPrices” which returns a list back of product ASIN’s

 List<string> prodASINs = dc.GetASINForUpdateLowPrices.ToList();

SQL for the view i am using, this may help a little bit more.

 SELECT     asin
 FROM         dbo.aboProducts
 WHERE     (asin NOT IN
           (SELECT     aboProducts_1.asin
            FROM       dbo.aboProducts AS aboProducts_1 INNER JOIN
                       dbo.LowestPrices ON aboProducts_1.asin = dbo.LowestPrices.productAsin
            WHERE      (dbo.LowestPrices.priceDate >= DATEADD(day, - 1, GETDATE()))))

Answer 1

When you call your GetASINForUpdateLowPrices, it wont directly return List<string> even if there is only one field in your view. Try the following approach:

List<string> prodASINs = dc.GetASINForUpdateLowPrices
                       .Select(item => item.AsinFieldName)
                       .ToList();

Visual Studio IntelliSense should suggest you the property name after typing item.. If the property is not string try to add .ToString() at the end of the property name.

Edit: After your comment, it seems like you need to use it as .Select(item => item.asin.ToString()).