CODEWITHSUNDEEP
c#.netlinq
Chris Morris
Chris Morris

Reputation: 1

Linq query referencing objects and a string array

I am having some trouble in converting the following code to use LINQ.

int occurs = 0;
foreach (string j in items)
{
if (!string.IsNullOrEmpty(j))
            {
                WorkflowModule tempWM = new WorkflowModule(j);
                if (tempWM.StateID == item.StateID)
                {
                    occurs++;
                }
            }
        }
        return occurs;

So far, I have:-

var lstItems = (from lstItem in items
                        where !string.IsNullOrEmpty(lstItem)
                        let objWorkflowModule = new WorkflowModule(lstItem)
                        select new
                        {
                            tempWM = objWorkflowModule.StateID
                        }).Where(item.StateID == tempWM));

        return lstItems.Count();

but intellisense is not liking the line '.Where(item.StateID == tempWM))'

Can anyone help me achieve this?

Thanks.

Upvotes: 0

Views: 247

Answers (3)

Kirk Woll
Kirk Woll

Reputation: 77606

When you use the method syntax, you need to use a lambda on the Where operator:

...
}).Where(x => x.tempWM == item.StateID));

In other words, you need to "declare" the variable x which holds the result of the previous part of the query.

Upvotes: 6

juharr
juharr

Reputation: 32296

Here's how I'd do this

var lstItems = from lstItem in items
               where !string.IsNullOrEmpty(lstItem)
               let objWorkflowModule = new WorkflowModule(lstItem)
               select objWorkflowModule.StateID;

return lstItems.Count(t=> t == item.StateID);

I'm assuming item is a variable defined outside of the original code you submitted. Basically you don't need to create the anonymous class in the query and you can put the predicate in you're Where into Count instead. But as others have said the main issue is that you need to express your predicate as a lambda.

Upvotes: 0

Ryan Bennett
Ryan Bennett

Reputation: 3432

It doesn't look like item is initialized anywhere in your statement.

Upvotes: 0

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