Weird issues when adding to a winform listbox

Question

I have an application that allows the user to select a file and display the folderilename in a listbox. The problem I am having is when it adds it to the listbox it adds a blank row above it. This is causing a second row to be created in the database with this field being blank. This only happens though with the first file selected. If I go back to add another one it does not add the blank row. It also does not happen if I select multiple files at once to add. In addition to that if I minimize then maximize the application any items listed in the listbox are duplicated. private void btnModSel_Click( object sender, EventArgs e) { System.IO.Stream myStream; OpenFileDialog openFiledialog1 = new OpenFileDialog(); openFiledialog1.FilterIndex = 2; openFiledialog1.InitialDirectory = "P:\Folder\subfolder" ; openFiledialog1.RestoreDirectory = true ; openFiledialog1.Multiselect = true ; openFiledialog1.Title = "Please Select a File" ; if (openFiledialog1.ShowDialog() == DialogResult.OK) { foreach (String file in openFiledialog1.FileNames) { try { if ((myStream = openFiledialog1.OpenFile()) != null ) { using (myStream) { lstModFiles.Items.Add(file.Substring(52)); } } } catch (Exception ex) { MessageBox.Show( "Error: Could not read file from disk. Original error: " + ex.Message); } } } }

Rafnas T P · Answer

hi, its good if you clear the list before adding list, so before foreach loop just clear your list as below lstModFiles.Items.Clear();

Scott G · Answer

I kept saying maximize which is not correct. It is happening when I restore the minimized app from the taskbar.

Scott G · Answer

Anyone have any other suggestions?

Scott G · Answer

I take that back. It is still adding the item multiple times to the listbox when I minimize/maximize.

Amit Gupta · Answer

Can you try clean and rebuild your project or try upgrading the .net framework. I hear this weird first time. Do try and let me know or share some screenshots

Scott G · Answer

Not real experienced with C#. I am kind of learning as I go. That being said it doesnt look like it likes file.FileName so I used string filename = Path.GetFileName(file) lstModFiles.Items.Add(filename) I am not noticing the issue when I minimize/maximize but it is still adding the blank line before the file in the listbox.

Amit Gupta · Answer

Why using substring as 52, if you want to add just filename then file.FileName will be used.