How to remove an item from ListView using LINQ in C#

I have the following ListView:

and I'm creating a List<string> of the items I want a list of rows to remove from that ListView:

List<String> lst =new List<String>{"A1","A2"};

I know that I can delete the rows using iterating through the index and deleting the item using RemoveAt()开发者_开发问答 function, but is there any way to do this using LINQ?

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As far as A1/A2 are the keys, no LINQ is required:

foeach(var a in new[] { "A1", "A2" })
    lw.Items.RemoveByKey(a);

Why not?

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But if you want to use LINQ at any cost, write you own extension method:

public static void ForEach<T>(this IEnumerable<T> collection, Action<T> action)
{
    foreach (var item in collection)
        action(item);
}

and use it this way:

new[] { "A1", "A2" }.ForEach(a => lw.RemoveByKey(a));

However keep in mind that this is a well-known but disputable approach.

btw, List<T> already has such extension method, but my works for any IEnumerable<T>:

new List<string> { "A1", "A2" }.ForEach(); // evokes List<T>.ForEach
new[] { "A1", "A2" }.ForEach(); // evokes my
new List<string> { "A1", "A2" }.AsEnumerable().ForEach(); // evokes my, I guess

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To do this, you can make a list of excluded items (and populate them however you want, but in this case I'm choosing a compile time list. Then you simply select all items in the first list and use the Except method to exclude items from the other list.

List<string> lst = new List<string>{"A1", "A2", "A3" };
List<string> excludedList = new List<string>{ "A1", "A2" };

var list = lst.Select(e => e)
              .Except(excludedList);

foreach (var a in list)
{
    Console.WriteLine(a + "\n"); //Displays A3
}