Simultaneous entry ASP form error

welshstew · #1 May 21st, 2007, 08:01

I'm having some trouble with an asp form that hopefully you can help me with. It's just a simple form that writes to a text file. However. when I am doing my stress testing it comes up with an asp error page. unfortunatly, I am unable to debug this, as it only appears within the live secure (https://) environment.

I beliee that what is ahppening is that when the text file is opened by an entry it is locked, and if another individual tries to enter at exactly the same time, this is when the error is occuring.

Is there anyway of changing the code below so that I do not come across this issue? maybe a wait 5 seconds and then resubmit?

Code: Select all

<%@ Page Language="C#" %>
<%@ import Namespace="System.IO" %>
<script runat="server">

    void Page_Load(Object semder, EventArgs e)
    {
    
            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 site
                    Response.Redirect("entryform_success.html");
    
                }
            }
    }
    
    
    private bool WriteToTextFile(string firstName, string middleName, string lastName, string postcode, string phone, string datenow)
    {
    
            bool success = true;
    
            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_0607\\experience_"+ datenow +".txt";
    
                StreamWriter 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;
            }
    
            return success;
    }

</script>

welshstew · #2 May 21st, 2007, 16:01

I've managed to close the connection to the file, which should help, and added a try catch block arounf the whole thing so that it just reloads the page on error

Anyone got any other ideas on how to improve this so that it stops freezing up on me?

Code: Select all

<%@ Page Language="C#" %>
<%@ import Namespace="System.IO" %>
<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_0607\\experience_"+ 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>

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Simultaneous entry ASP form error