Select similar items of different lists using using C# and Linq-CodePudding

In an asp.net mvc application, I am trying to perform a selection based on what user selects from product specifications. Imagine a user selected these parameters as a selection:

manufacturer: [apple, sony, samsung]
ram: [8, 128, 256]
size: [12, 13.5]

based on that, lets say the selection resulted in lists of product Ids.

list1={10,12,18,100}
list2={10,18,20,21,100,102}
list3={1,2,9,10,12,18,100}

the result should be common Ids:

result={10,18,100}

Since there might be more than 3 lists, is there a Linq command for any number of lists?

CodePudding user response：

You can use the Intersect method provided by .NET. Here's the documentation about the usage

CodePudding user response：

Use intersect to get similar item from Two Lists.

List<string> Fruits = new List<string>();
        Fruits.Add("Apple");
        Fruits.Add("Mango");
        Fruits.Add("Grapes");
        Fruits.Add("Banana");
        Fruits.Add("Orange");
        Fruits.Add("Sweet Potato");

        List<string> Vegetables = new List<string>();
        Vegetables.Add("Tomato");
        Vegetables.Add("Potato");
        Vegetables.Add("Onion");
        Vegetables.Add("Apple");
        Vegetables.Add("Orange");
        Vegetables.Add("Banana");

        var Data = Fruits.Intersect(Vegetables).ToList();
        foreach(var d in Data)
        {
            Console.WriteLine(d);
        }

Output:- Apple Banana Orange