Question

I have a folder with files (the files in this folder can variate in number):

XXX_1.jpg
XXX_2.jpg
ZZZ_1.jpg
ZZZ_2.jpg
BBB_1.jpg
YYY_1.jpg

I want to populate a listView that has two columns: Name & Count.

In this example, the listView should look like this:

XXX 2
ZZZ 2
BBB 1
YYY 1

How would I go about constructing a LINQ query to separate name & count from the items in the folder and then populate the listView with the name of the file + how many times its in the directory?

Here’s how I started:

IEnumerable<string[]> groups = originalFiles
                                .GroupBy(policyName => policyName.Split('_')[0])
                                .Select(g => g.ToArray());

                foreach (var group in groups)
                {
                    //add group name + count in listView
                }

I need to add Count() somewhere there but I’m not really sure.

Answer 1

Try this

var groups = orignalFiles.GroupBy(o => o.Split('_')[0])
                       .Select(o => new { 
                                           Name = o.FirstOrDefault().Split('_')[0], 
                                           Total = o.Count() 
                                        });

Good Luck !!