CODEWITHSUNDEEP
c#winformsopenfiledialog
Luis
Luis

Reputation: 437

Get the selected files in Open File Dialog

I need to get the selected files in a OpenFileDialog. For a single file, I'm doing this:

EDIT:

var count = SelectedItems(handle); // handle is the handle to ListView control in OpenFiledialog
var bufferSize = 2048 * count;
if (bufferSize > 0)
{
    var path = new StringBuilder(bufferSize)
    SendMessage(handle, CDM_GETFILEPATH, (IntPtr)path.Capacity, path);
}

And it works fine, but I need to check for multiple files (Multiselect = true). I don't know the buffer size (stringBuilder size).

EDIT: I'm customizing the Open File Dialog. I'm trying to get the selected files before the OFD window is closed.

EDIT: Currently I can have a list of selected files, BUT, only the filenames, without path, I'm using this:

var totalItemsCount = SendMessage(handle, LVM_GETITEMCOUNT, 0, 0);
var fileNames = new List<string>();
var lvi = new LVITEM();
var lviPtr = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(LVITEM)));

for (var i = 0; i < totalItemsCount; i++)
{
    var pcsText = Marshal.AllocHGlobal(1024);

    lvi.iSubItem = 0;
    lvi.cchTextMax = 1024;
    lvi.pszText = pcsText;

    Marshal.StructureToPtr(lvi, lviPtr, fDeleteOld: true);

    var success = SendMessage(handle, LVM_GETITEMTEXT, i, (int)lviPtr);
    if (success > 0)
    {
        var itemState = SendMessage(handle, LVM_GETITEMSTATE, i, 2);
        var selected = (itemState & 2) != 0;
        if (selected = (itemState & 2) != 0)
        {
            lvi = (LVITEM)Marshal.PtrToStructure(lviPtr, typeof(LVITEM));
            var name = Marshal.PtrToStringAnsi(lvi.pszText);
            fileNames.Add(name);
        }
     }

     Marshal.FreeHGlobal(pcsText);
 }

 Marshal.FreeHGlobal(lviPtr);

What I'm doing is to get the selected files directly from the listview, but I need gthe filenames with the path.

When the OpenfileDialog change the folder, I can get the folder path with:

var folderPath = new StringBuilder(256);
SendMessage(handle, CDM_GETFOLDERPATH, (IntPtr)256, folderPath);

But it doesnt work when the folder is an special folder, like the libraries.

Upvotes: 0

Views: 2036

Answers (2)

Aousaf Rashid
Aousaf Rashid

Reputation: 5738

Simple :

  IO.Stream st1

 ///Set MultiSelect property to true
  openfiledialog1.MultiSelect = true;



  ///Now get the filenames
  if (openfiledialog1.ShowDialog() == DialogResult.OK)
  {
    foreach (String file in openfiledialog1.FileNames) 

    {
      try
      {
        if ((st1 = openfiledialog1.OpenFile()) != null)
        {
          using (st1)
          {
           List.Add(file);
          }
       }
    }

Note: Don't know if this will also work with the custom control as well as no code is provided regarding the custom control

Upvotes: 0

user3830154
user3830154

Reputation: 25

the StringBuilder buffer will autoexpand

Upvotes: -3

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