Time for action – querying a documents collection

You will add the QueryOrder() method to the Program class, which you will call to query the Orders database and retrieve Orders, which match the criteria we specify:

1. Add the following code snippet to the Main() method:

   

2. Save all the files, build and run the solution.

3. View the results in the output window.

What just happened?

We want to query the Orders database and retrieve only those Orders whose UnitCost is more than 10.0.

For that, we call the Query() method on the session object using a LINQ query that selects those Orders whose UnitCost value is more than 10.0 (line 70 in the previous code snippet).

Then, the Orders documents that match this criteria are stored in the orders field. To display each element in the orders list, we call the DisplayOrder() method and use a foreach loop (lines 78 to 88).

Have a go hero – querying a collection using lambda expression

You learned how to query a documents collection using a regular Linq query. You can...