Grouping Listview Items

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Hi every one

I wrote program in c# get details about files to compare them later

I have Listview control with 6 column
I an using the following code to add items to listview

but I need to group items according to column 6 values

C#

var items = from f in Files_pathes_hash_Dup
                        select new ListViewItem(
                            new string[] {
                            new System.IO.FileInfo(f).Name, // Name
                            new System.IO.FileInfo(f).FullName, // Directory
                            new System.IO.FileInfo(f).CreationTime.ToString(), // Date Modified
                            new System.IO.FileInfo(f).Length.ToString(),
                            new System.IO.FileInfo(f).Extension,
                            f});
            listView_Files.BeginUpdate();
            listView_Files.Items.AddRange(items.ToArray());
            listView_Files.EndUpdate();

how can I do that without specified group name before adding each items
because I have huge number of Items and I that way it will take long time

Thank you all

Posted 6-Dec-13 22:12pm

dabbourabd

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BillWoodruff 7-Dec-13 4:41am

Where do your group names come from, then ?

1 solution

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OriginalGriff · Answer 1 · 2013-12-06T22:49:00

Solution 1

Try:

C#

var items = from fi in
                 (from f in files
                  select new FileInfo(f))
             select new string[] {
                 fi.Name, // Name
                 fi.FullName, // Directory
                 fi.CreationTime.ToString(), // Date Modified
                 fi.Length.ToString(),
                 fi.Extension };

You shouldn't need the original path at teh end, since it is already there as the FullName.

Posted 6-Dec-13 22:49pm

OriginalGriff

Comments

dabbourabd 7-Dec-13 12:52pm

thank you for replay
in my code the final value is function to get hash code for the file
and that not my problem
my question is how can I grouping items according to hash code????

var items = from f in Files_pathes_hash_Dup
select new ListViewItem(
new string[] {
new System.IO.FileInfo(f).Name, // Name
new System.IO.FileInfo(f).FullName, // Directory
new System.IO.FileInfo(f).CreationTime.ToString(), // Date Modified
new System.IO.FileInfo(f).Length.ToString(),
new System.IO.FileInfo(f).Extension,
get_hash(f)});
listView_Files.BeginUpdate();
listView_Files.Items.AddRange(items.ToArray());
listView_Files.EndUpdate();