Question

So I was trying to convert a SQL into LINQ query

the logic is:

  JOIN SalesPeriod SP1 
  ON
     SP1.SalesPeriodId = SE1.SalesPeriodId AND SP1.SalePeriodId = .....(XML stuff)

but it keeps complaining the types on both sides of equals statement don’t match

Any ideas?

Note: I declared b and d because it doesn’t accept anonymous type members
and I tested two equal conditions separately and they both work

thanks

   join SP1 in fentities.SalesPeriods
                on new { SE1.SalesPeriodId, b = XDocument.Load(MI.Body).Element("ns:Transfer").Element("ns:ReceivedBy").Element("ns:Id").FirstNode.ToString() }
                equals new { SP1.SalesPeriodId, d = SP1.SalesPeriodId.ToString() }

Answer 1

Simple, they’re not the same (compatible) types. The first key has a SalesPeriodId of type whatever, and b of type string. The second key has a SalesPeriodId of type whatever (probably the same as the first’s), and d of type string. You can’t compare these to eachother. It must have the same properties of the same types declared in the same order. Just pick one of the names b or d and use that name.

...
join SP1 in fentities.SalesPeriods
    on new { SE1.SalesPeriodId, b = XDocument.Load(MI.Body).Element("ns:Transfer").Element("ns:ReceivedBy").Element("ns:Id").FirstNode.ToString() }
    equals new { SP1.SalesPeriodId, b = SP1.SalesPeriodId.ToString() }