Question

The user is selecting multiple files

  OpenFileDialog openFileDialog1 = new OpenFileDialog();
  openFileDialog1.Multiselect = true;
  DialogResult result = openFileDialog1.ShowDialog(); // Show the dialog.
  int id = RadarGraphInsertDLL.SalesDWH.Return_Last_QuickLabDumpID();
  if (result == DialogResult.OK) // Test result.
  {
      foreach (string file in openFileDialog1.FileNames)
      {
         /////

I would like the foreach to work on the files in order of MODIFIED DATE

How do I grab the files by modified date?

Answer 1

Try using this to order the list of files:

openFileDialog1.FileNames.OrderBy(p => System.IO.File.GetLastWriteTime(p))

EDIT – Ordering clarification

In this case, .OrderBy will order the file names in terms of the oldest modified file first. To order in terms of the most recently modified file first, use .OrderByDescending instead.