file lock on entry form

[welshstew]

Is anyone available to help??

I have a asp form that writes to a text file, however, if i get more than one user entering at exactly the same time i get a file lock issue. below is my code, is there anyway to stop this from happening??

Thanks in advance. stew

Code: Select all

<script runat="server">

    void Page_Load(Object semder, EventArgs e)
    {
    
          try
            {

          lblError.Visible = false;
    
                if (!Page.IsPostBack)
                {
                
                
                }
                else
                {
                    Page.Validate();
                    if (Page.IsValid)
                    {
                       // get the form values
                        string firstName = txtFirstName.Text.Trim();
                        string middleName = txtMiddleName.Text.Trim();
                        string lastName = txtLastName.Text.Trim();
                        string postcode = txtPostcode.Text.Trim();
                    string phone = txtPhone.Text.Trim();
                    //string optin = radFurtherInfo.SelectedValue;
                    string datenow = System.DateTime.Today.ToString("dd-MMM-yyyy");
    
                        // write 'em out to a text file
                        if (!WriteToTextFile(firstName, middleName, lastName, postcode, phone, datenow))
                        {
                            lblError.Visible = true;
                        }
    
                        // redirect to the microsite
                        Response.Redirect("entryform_success.html");
    
                    }
            }
    }    
    catch(Exception ex)
    {
        //just swallow the error
    }
    }
    
    
    private bool WriteToTextFile(string firstName, string middleName, string lastName, string postcode, string phone, string datenow)
    {
    
            bool success = true;
    
           StreamWriter sw = null;
        try
            {
                // Change this to the location you want to save the data
                // Be careful with permissions on this file, it shouldn't be browsable
                // E.g. string filename = "d:\\webdata\\events\\"
                string fileName = "c:\\comp_entry_07\\entry_"+ datenow +".txt";
                sw = new StreamWriter(fileName, true);
    
                sw.WriteLine(firstName.Replace(",", "") + "," + middleName.Replace(",", "") + "," + lastName.Replace(",", "")
                    + "," + postcode.Replace(",", "") + "," + phone + ","+ datenow);
    
                sw.Close();
             }
            catch(Exception ex)
            {
               lblError.Text = ex.Message;
                success = false;
            }
        finally
            {
               if (sw != null)
               sw.Close();
             }

    
    
            return success;
    }

</script>

[welshstew]

I've been reading that I can put some sort of lock function into the code, anyone got any ideas?

Or any way of speeding up the data dump into the text file?

oh yeah, the reason for using a text file is that I am unable to place a db onto the server, security and all that.