It refuses to write to a text file if the string used to be a path

[cinder303]

Hi!

I've searched everywhere to find out why the heck my program is doing this, but couldn't find anything like it...?

I'm making a flash card program. Part of my program takes images corresponding to other data from a certain area, chosen by the user, and moves them to another folder, for later use. I want to store the path for the image next to the other data, storing the path as a string. When no image is chosen, the variable for the path is simply "no image".

For some reason, whenever the variable for the path contains an actual path, the program won't write it, but will when the variable is "no image".

This is the code where the user selects an image:

Private Sub btnImage_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnImage.Click

    imgBox.Width = 325
    imgBox.Height = 350
    opnImage.ShowDialog()
    imagePath = opnImage.FileName
    If imagePath <> "OpenFileDialog1" Then
      n += 1

      Dim fileExtension As String = Path.GetExtension(imagePath)
      newName = n & fileExtension
      newLocation = imgDirectory & newName

      If File.Exists(newLocation) Then
        File.Delete(newLocation)
      End If
      File.Copy(imagePath, newLocation)
      imgBox.Image = Image.FromFile(newLocation)
      ResizePicture()
    End If

  End Sub

This is the code for writing the information to the text file:

Sub WriteLine()

    Dim courseFile As StreamWriter = File.AppendText(currentCourse & ".txt")
    Dim newLine As String = Question & "@" & Answer & "@" & newLocation
    courseFile.WriteLine(newLine)
   
  End Sub

I have tried putting the path into a text box first, and then writing it from there, and it won't write. I've tried creating substrings from the path, and then putting them together, and it refuses. I am completely confused!