[Solved]-Using LINQ to filter a list of items based on those items' presence in another list-LINQ,C#

score:5

I think this is what you want.

if (list2.Any(l2c => l2c.Name == cmd.Name))
{ ... }

but you can add it to the foreach and avoid the if in your code:

foreach(Command cmd in list1.Where(l1c => list2.Any(l2c => l2c.Name == l1c.Name)))
{
    ... some code ...
}

If you control the Command class and can define equality in it (overriding Equals, etc), you can simply use Intersect:

foreach(var cmd in list1.Intersect(list2))
{ ... }

If you don't control Command or don't want to define equality in the class, you can still use Intersect with an IEqualityComparer

foreach(var cmd in list1.Intersect(list2, new CommandComparer()))
{ ... }

class CommandComparer : IEqualityComparer<Command>
{ ... }

Austin Salonen 47592

score:3

I think you are looking for something like this

if(list2.Any(list2cmd=> list2cmd.Name == cmd.name))
{
    // do stuff
}

Marty 7324

score:3

You can get the enumerable itself as:

var query = list1.Where(cmd => (list2.Any(item => item.Name == cmd.Name)));

Then just loop over query, which will contain every Command you want:

foreach( Command cmd in query)
{
    // Do something
}

NominSim 8270

score:5

if (list2.Any(x => x.Name == cmd.Name)) { }

sisve 19243

score:6

Try this:

if (list2.Any(item => item.Name == cmd.Name)) {
}

Here is the "anatomy" of the statement:

Any applies its condition to each item of list2, and returns true if true has been returned for any item from the list
The predicate inside Any tests for item's name to be equal to that of cmd.

You can fold the if into LINQ as well:

foreach (var cmd in list1.Where(c => list2.Any(item => item.Name == c.Name))) {
    ...
}

Sergey Kalinichenko 697190