Streamwriter writes to text file..start writing at end of file

[briprogram]

Hi

I have information from textboxes that are being placed into a textfile from a streamwriter but I want it to write to the end of the file, like add on to what is already there. How can I do that?

    Private Sub btnSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSave.Click
        Dim filewriter As StreamWriter
        Dim output As FileStream

        Dim filechooser As New SaveFileDialog
        Dim result As DialogResult = filechooser.ShowDialog
        Dim filename As String

        If result = Windows.Forms.DialogResult.Cancel Then
            Return
        End If

        filename = filechooser.FileName
        output = New FileStream(filename, FileMode.OpenOrCreate, FileAccess.Write)
        filewriter = New StreamWriter(output)
        'btnReadFile.Enabled = True


        filewriter.WriteLine(txtFirst.Text & vbTab & txtLast.Text & vbTab & _
        txtID.Text & vbTab & txtGrade.Text & vbTab & txtClass.Text)
        filewriter.Close()

        txtFirst.Text = ""
        txtLast.Text = ""
        txtID.Text = ""
        txtGrade.Text = ""
        txtClass.Text = ""


    End Sub

--------------------------
Thanks
Brian

 

[jebenson]

Create the StreamWriter object like this:

filewriter = New StreamWriter(output, [blue]True[/blue])

The 'True' in the second parameter tells the StreamWriter to append to the file. 'False' (the default) will overwrite the file.



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[briprogram]

This gives the syntax error...

Overload resolution failed because no accessible 'New' can be called with these arguments:

'Public Sub New(path As String, append As Boolean)': Value of type 'System.IO.FileStream' cannot be converted to 'String'.




--------------------------
Thanks
Brian

 

[Borvik]

Actually I think it is this line:
output = New FileStream(filename, FileMode.OpenOrCreate, FileAccess.Write)

I believe you should change that to:
output = New FileStream(filename, FileMode.Append, FileAccess.Write)

Or you could change the code from so you don't create a FileStream object, and instead just create a StreamWriter object with the path as the first parameter and a boolean True as the second parameter (As true for append).

Hope that helps.

 

[briprogram]

Thanks (FileMode.Append) did the trick...

output = New FileStream(filename, FileMode.Append, FileAccess.Write)

--------------------------
Thanks
Brian