adding index to linq query result

I have a linq query that returns a list of MyObject. I'd like to add a property to MyObject called TheIndex and that contains the ordinate of the item in the sequence.

In other words, I need something like this:

var TheResult = from d in MyDataContext
                where.....
                select new MyObject
                {
                   Property1 = d.whatever,

    开发者_开发百科               TheIndex = ?

                 }

The query returns a list of MyObject and I'd like each item in the list to contain the index as one of its property.

Thanks.

Once you get away from the query syntax, you'll find a Select overload that gives you the index you're looking for.

var result = MyDataContext
   .Where(d => d.Prop == "A")
   .AsEnumerable()
   .Select((d, i) => 
      new MyObject() {
         Property1 = d.whatever,
         TheIndex = i
    });