Unhandled exception has occured in the application vb.net - vb.net

Question

Ok, so my code look like the following.
Dim file As System.IO.StreamWriter
file = My.Computer.FileSystem.OpenTextFileWriter("E:/Med/Dra.txt", False)
file.WriteLine(NameBasic)
file.WriteLine(LastBasic)
file.WriteLine(PhoneBasic)
file.Close();
All those are variables that I have set for text boxes. This is OnbuttonClick(...
Now for my onload I take the info out of the notepad, Here is the code,
Dim read As System.IO.StreamReader
read = My.Computer.FileSystem.OpenTextFileReader("E:/Med/Dra.txt")
lblNameBasic.Text = read.ReadLine
lblLastBasic.Text = read.ReadLine
lblPhoneBasic.Text = read.ReadLine
read.Close();
I have placed the notepad(txt file) inside a flashdrive folder named med
I got the saving info to work and load, so I took the flashdrive to another computer, I got this nasty error, talking about the System.IO and all this other stuff.
It then prompts me, would you like to continue with errors, or quit.
I click continue than all the saved data does not load. Am I doing something wrong here??
Also sorry for alot of questions today. (The .exe is in the flashdrive, med folder aswell).

Answer 1

First of all, your path is incorrect - E:/Med/Dra.txt should be E:\Med\Dra.txt. And here how you use open file dialog - this is just basis, you need to take care of error handling, etc.
Dim openFileDialog1 As New OpenFileDialog()
openFileDialog1.InitialDirectory = "c:\"
openFileDialog1.Filter = "txt files (*.txt)|*.txt"
openFileDialog1.RestoreDirectory = True
If openFileDialog1.ShowDialog() = System.Windows.Forms.DialogResult.OK Then
Dim read As System.IO.StreamReader = My.Computer.FileSystem.OpenTextFileReader(openFileDialog1.FileName)
End If
I think, main reason why you had errors is because incorrect path. You can also check if path exists
If Not File.Exists("E:\Med\Dra.txt") Then
MessageBox.Show("There is no such file")
Exit Sub
End If
' Code to open non existing file will be skipped