Hi.  I am experimenting with AJAX with ASP for the first time and I have a question.  I want to have a textbox that when a user will type in something a txt file on the server will change to the textbox's text instantaneous, like real-time editing.  I have the textbox and a timer.  The timer goes every 10 ms and opens a text reader and changes the text to textbox1.text, yet the contents are not being updated in the textbox.  Any help?  Oh and I did turn EnablePageMethods to true and I know that the timer is executing.

Here is the code:

    Dim send As IO.StreamWriter
    Sub Timer1_Tick(ByVal sender As Object, ByVal e As System.EventArgs) Handles Timer1.Tick
        send.Write(TextBox1.Text)
    End Sub

    Sub WebForm1_Init(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Init
        send = FileIO.FileSystem.OpenTextFileWriter("doc.txt", False)
    End Sub

Hey,

I think you are writing the data to the stream but not saving it?

The examples on this page wrap the stream usage in a using() block which will call the dispose methods when its finished writing - i don't know if that is what flushes the file to disk?

• http://msdn.microsoft.com/en-us/library/system.io.streamwriter.aspx
  

Also you might be having a file path issue, would be better to use something like

send = FileIO.FileSystem.OpenTextFileWriter(Server.MapPath("~/App_Data/doc.txt", False)

It’s not really a good idea to call the server every 10 ms for every user in your application, this would consume all of your server’s resources, it looks that you are using UpdatePanels, they are way slower than WebServices which makes thinks even worse, if you need to edit the file actively then you could use the JavaScript  onkeyup event and WebServices, this will give a better performance by using less resources.