Problem opening and saving text files.

[Ashylay]

Okay so I have created a script that should open and save text files according to the date which has been selected on a datetimepicker control.

In my Bin\Debug directory I have a text file named "30 December 2007.txt"

and here is my code:

Imports System.IO
 
Public Class Form1
 
    Dim SR As StreamReader
    Dim SW As StreamWriter
 
    Private Sub DateTimePicker1_ValueChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles DateTimePicker1.ValueChanged
        Dim theDatePicked As String = DateTimePicker1.Text & ".txt"
        SR = New StreamReader(theDatePicked)
        TextBox1.Text = SR.ReadToEnd
    End Sub
 
    Private Sub Button16_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button16.Click
        Dim theDatePicked As String = DateTimePicker1.Text & ".txt"
        SW = New StreamWriter(theDatePicked)
        SW.Write(TextBox1.Text)
        SW.Flush()
    End Sub
 
    Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        Dim theDatePicked As String = DateTimePicker1.Text & ".txt"
        SR = New StreamReader(theDatePicked)
        TextBox1.Text = SR.ReadToEnd
    End Sub
End Class

I keep getting this error message when I try to debug it.

An error occurred creating the form. See Exception.InnerException for details. The error is: Could not find file 'C:\Users\Matt's Computer\Documents\Visual Studio 2008\Projects\iDiary\iDiary\bin\Debug\.txt'.

[dbasnett]

You have this:

Dim theDatePicked As String = DateTimePicker1.Text & ".txt"

Try this:

Dim theDatePicked As String = DateTimePicker1.Value & ".txt"

[jmcilhinney]

I strongly suggest that if you want to name files by date that you use a sortable format, so that chronological order matches alphabetical order. I also strongly suggest that you close your files after using them. Assuming that you're using VB 2005 this is all very simple:

Me.TextBox1.Text = IO.File.ReadAllText(IO.Path.Combine(Application.StartupPath, _
                                                       String.Format("{0:yyyyMMdd}.txt", _
                                                                     Me.DateTimePicker1.Value)))

IO.File.WriteAllText(IO.Path.Combine(Application.StartupPath, _
                                     String.Format("{0:yyyyMMdd}.txt", _
                                                   Me.DateTimePicker1.Value)), _
                     Me.TextBox1.Text)