如何使用LINQ比较两个IEnumerable集合

Question

I am using a WPF application with MVVM model. I want to know how to compare two IEnumerable collection values. I am having two IEnumerable values , named as AvailablePacks and RecommendedPacks . These two collection have different set of values but they are having common property PackID value. And AvailablePacks having a another property named as Quantity .

Now i want to compare these two IEnumerable collection values based upon PackID value, When the both collection having the same PackID I need to assign that Quantity (Inside of AvailablePacks) value to some variable called PackQuantity Which is declared outside .

I am new to LINQ So i am not able to do this properly.

So How Can i achieve this? Can any one tell me a solution of this?

Thanks.

Answer 1

  var result = from ap in AvailablePacks  
             join rp in RecommendedPacks 
               on ap.PackID equals rp.PackID
               select new {
                  PackQuantity = ap.Quantity
               };

Answer 2

Are you looking for something like this?

var query = from x in AvaillablePacks
            join y in RecommendedPacks on x.PackID equals y.PackID
            select new
            {
                PackQuantity = x.Quantity
            };

Answer 3

Somethign like this should work for you:

var result = (from availablePack in AvaillablePacks 
                join recommendedPack in RecommendedPackson 
                     availablePack.PackID equals recommendedPack .ID)

foreach(var availablePack in result)
    availablePack .Quantity = PackQuantity ;