c# - Why doesn't my ListView show Details view properly? -

so, i've got list view, indicated question title. i've got 2 columns set up: name , date modified. these added in designer, here's code emitted designer reference:

// lstfiles this.lstfiles.columns.addrange(new system.windows.forms.columnheader[] { this.clmname, this.clmdate}); // ...  // clmname this.clmname.text = "name"; this.clmname.width = 105;  // clmdate this.clmdate.text = "modified"; this.clmdate.width = 128; 

in designer, looks beautiful.

the list items tiny subclass of listviewitem extracts metadata file (in case, date modified), , adds sub-item itself:

class galleryitem : listviewitem {     public string file;     public datetime datemodified;      public galleryitem(string file) : base(path.getfilenamewithoutextension(file)) {         this.imagekey = path.getextension(file);         file = file;         datemodified = system.io.file.getlastwritetime(file);          this.subitems.add(datemodified.tostring());     } } 

to add items list, this:

lstfiles.beginupdate(); lstfiles.clear();  foreach (string f in files) {     listviewitem lvi = new galleryitem(f);     lvi.group = lstfiles.groups["grpfiles"]; //this varries      //omitted: check/add icon list       lstfiles.items.add(lvi); }  lstfiles.endupdate(); 

so, works great large icon view, etc:

however, breaks down on details view:

there are items in list (there's scroll bar). if click in column under red arrow (added in paint), you'll select item (the upper-right area image preview), won't see selected.

in summary, doing wrong?

i whipped sample test this:

using system; using system.windows.forms;  static class program {     [stathread]     static void main()     {         application.enablevisualstyles();         application.setcompatibletextrenderingdefault(false);          var g1 = new listviewgroup("group 1");         var g2 = new listviewgroup("group 2");          application.run(new form {             controls = {                 new listview  {                     dock = dockstyle.fill,                     groups = { g1, g2 },                     view = view.details,                     //columns = { "first", "second" },                     items = {                         new listviewitem { text = "one", group = g1, subitems = { "1" } },                         new listviewitem { text = "two", group = g2, subitems = { "2" } },                         new listviewitem { text = "three", group = g2, subitems = { "3" } },                     },                 },             },         });     } } 

you notice duplicates problem. if uncomment line creates columns works. suggests columns don't exist.

and while typing answer popped head:

you calling listview.clear instead of listview.items.clear removing columns in code.