Question

Possible Duplicate:
How do I use LINQ Contains(string[]) instead of Contains(string)

Suppose I have the following class and objects:

class Product
{ 
   public int ProductId { get; set; }
   public string ProductDesc { get; set; }
} 

string[] arrayString = new string []{"A", "B", "C", "D"};

List<Product> products = new List<product>();

Is this code:

var filteredProducts = new List<product>();
foreach(var searchString in arrayString)
{ 
   filteredProducts.Union(Products.Where(p => p.ProductDesc.Contains(searchString)));
}

equivalent to this:

var filteredProducts = products.Where(p => p.ProductDesc.Contains(arrayString.Select(s => s).ToString()));

If that is not the case, how can the first code snippet be rewritten by using LINQ?

Answer 1

No, the equivalent LINQ form is

var filteredProducts = products.Where(p =>
    arrayString.Any(s => p.ProblemDesc.Contains(s));

Talking out loud:

Select all products for which any one of the strings in arrayString
is contained within the product’s ProblemDesc.