Email resent on page refresh

[Morris Neuman]

Hi,
My page has several textbox fields and a submit button. I have attempted to
reset the textbox fields to nulls after the email is sent. However, when the
user clicks on the page refresh button, though the textbox fields are empty,
another email gets sent (the email contains the fields previously entered in
the fields.

How do I set the fields to null and not have the email resent on page refresh?

protected void SubmitContactForm_Button1_Click(object sender, EventArgs e)
{
try
{

string RemoteHost = Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
if (RemoteHost == "")
{
RemoteHost = Request.UserHostAddress;
}
string EmailSubject =
ConfigurationManager.AppSettings["ContactMsgSubject"];
string EmailFrom =
ConfigurationManager.AppSettings["WebMasterEmail"];
string EmailTo = ConfigurationManager.AppSettings["SalesEmail"];
string EmailCC = "";
string EmailBody = "Name=" + TextBox1.Text + " Phone=" +
TextBox2.Text + " Message=" + TextBox3.Text + " Remote Host=" + RemoteHost;

MailMessage message = new MailMessage();

message.From = new MailAddress(EmailFrom);

foreach (string torec in EmailTo.Split(';'))
{
if (torec != "")
{
message.To.Add((torec));
//message.To.Add(new MailAddress(rec));
}
}

message.Subject = EmailSubject;
message.Body = EmailBody;
message.IsBodyHtml = true;

SmtpClient client = new SmtpClient();

client.Send(message);

//Response.Redirect("index.aspx");
TextBox1.Text = "";
TextBox2.Text = "";
TextBox3.Text = "";
ClientScript.RegisterStartupScript(GetType(), "OK!",
String.Format("alert('Email has successfully been sent to {0} and copied to
{1}');", EmailTo.Replace("'", "\'"), EmailCC.Replace("'", "\'")), true);
}
catch (System.Configuration.Provider.ProviderException c)
{
ClientScript.RegisterStartupScript(GetType(), "Error!",
String.Format("alert('Email has NOT been sent to {0} and copied to {1}');",
c.Message.Replace("'", "\'")), true);
}
}

protected void ResetContactForm_Button2_Click(object sender, EventArgs e)
{
TextBox1.Text = "";
TextBox2.Text = "";
TextBox3.Text = "";
}



<h5>Contact form</h5>
<asp:Label id="Label1" runat="server" Text="Name"></asp:Label>

<asp:TextBox id="TextBox1" runat="server" Width="175px"></asp:TextBox>
<asp:Label id="Label2" runat="server" Text="Phone"></asp:Label>

<asp:TextBox id="TextBox2" runat="server"></asp:TextBox>
<asp:Label id="Label3" runat="server" Text="Message"></asp:Label>

<asp:TextBox id="TextBox3" runat="server" Height="62px"
TextMode="MultiLine" Width="318px"></asp:TextBox>
<asp:Button id="Button1" runat="server" Text="Submit"
onclick="SubmitContactForm_Button1_Click"/>

<asp:Button ID="Button2" runat="server" Text="Reset"
onclick="ResetContactForm_Button2_Click"/>
<p> </p>

 

[Allen Chen [MSFT]]

Hi Morris,

My page has several textbox fields and a submit button. I have attempted to
reset the textbox fields to nulls after the email is sent. However, when the
user clicks on the page refresh button, though the textbox fields are empty,
another email gets sent (the email contains the fields previously entered in
the fields.

How do I set the fields to null and not have the email resent on page

refresh?

From your description a user clicks refresh button on the browser and then
clicks the retry button on the popup window right? To avoid the code in the
button click event handler to be executed again in this case, the easiest
way is to add the following code at the bottom of the button click event
handler to redirect user to the same page. This will cause a get request
got sent when user clicking the refresh button, in which case the click
event handler will not be executed again.

Response.Redirect("YourPage.aspx"); //add it to the end of
SubmitContactForm_Button1_Click. Remember to replace YourPage.aspx with
your page name.

Please have a try and let me know if it can meet your requirement.

Regards,
Allen Chen
Microsoft Online Support

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[Morris Neuman]

OK. So if I redirect then I do not get duplicate email send. However I do
not see the thank you message either. I tried the redirect after the
clientscript however that does not show the thank you message either. I
would like to show the thank you message and then redirect to a page. How
can I do that?

Response.Redirect("aboutSS-contacts.aspx");
ClientScript.RegisterStartupScript(GetType(), "OK!",
String.Format("alert('Thank you. Your request has been submitted to {0}');",
EmailTo.Replace("'", "\'")), true);

 

[Allen Chen [MSFT]]

Hi Morris,

OK. So if I redirect then I do not get duplicate email send. However I do
not see the thank you message either. I tried the redirect after the
clientscript however that does not show the thank you message either. I
would like to show the thank you message and then redirect to a page. How
can I do that?

In this case you can redirect user to another page to call the JavaScript
function to show thanks and redirect user back to the original page after
the page is loaded at client side.


Please try following code to test:

Default.aspx:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs"
Inherits="WebApplication21._Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>

<asp:Button ID="Button1" runat="server" onclick="Button1_Click"
Text="Click Me" />

</div>
</form>
</body>
</html>

Default.aspx.cs:

public partial class _Default : System.Web.UI.Page
{
string EmailTo = "allen chen";
protected void Page_Load(object sender, EventArgs e)
{

}

protected void Button1_Click(object sender, EventArgs e)
{
//Send email.
//When completed, redirect user to page2. Pass information via querystring

Response.Redirect(string.Format("Page2.aspx?showthanks=1&emailto={0}",EmailT
o));

}
}

Page2.aspx:
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Page2.aspx.cs"
Inherits="WebApplication21.Page2" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<script type="text/javascript">
setTimeout("Redirect()", 10);
function Redirect() {
window.location = "Default.aspx";
}
</script>
</div>
</form>
</body>
</html>

Page2.aspx.cs:

protected void Page_Load(object sender, EventArgs e)
{
//Get information passed from original page.

string EmailTo = Request.QueryString["emailto"];
if (!String.IsNullOrEmpty(Request.QueryString["showthanks"])
&&
!String.IsNullOrEmpty(Request.QueryString["emailto"])
)
{
//Register JavaScript to show thanks. The redirect JavaScript is in
//Page2.aspx

ClientScript.RegisterStartupScript(GetType(), "OK!",
String.Format("alert('Thank you. Your request has been submitted to
{0}');",
EmailTo.Replace("'", "\'")), true);


}
}


Regards,
Allen Chen
Microsoft Online Support

 

[Morris Neuman]

Thanks Allen. Will try later. For now I am using your initial suggestion to
redirect to another page view where I will post the thankyou message.
--
Thanks
Morris

Hi Morris,

OK. So if I redirect then I do not get duplicate email send. However I do
not see the thank you message either. I tried the redirect after the
clientscript however that does not show the thank you message either. I
would like to show the thank you message and then redirect to a page. How
can I do that?

In this case you can redirect user to another page to call the JavaScript
function to show thanks and redirect user back to the original page after
the page is loaded at client side.


Please try following code to test:

Default.aspx:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs"
Inherits="WebApplication21._Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>

<asp:Button ID="Button1" runat="server" onclick="Button1_Click"
Text="Click Me" />

</div>
</form>
</body>
</html>

Default.aspx.cs:

public partial class _Default : System.Web.UI.Page
{
string EmailTo = "allen chen";
protected void Page_Load(object sender, EventArgs e)
{

}

protected void Button1_Click(object sender, EventArgs e)
{
//Send email.
//When completed, redirect user to page2. Pass information via querystring

Response.Redirect(string.Format("Page2.aspx?showthanks=1&emailto={0}",EmailT
o));

}
}

Page2.aspx:
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Page2.aspx.cs"
Inherits="WebApplication21.Page2" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<script type="text/javascript">
setTimeout("Redirect()", 10);
function Redirect() {
window.location = "Default.aspx";
}
</script>
</div>
</form>
</body>
</html>

Page2.aspx.cs:

protected void Page_Load(object sender, EventArgs e)
{
//Get information passed from original page.

string EmailTo = Request.QueryString["emailto"];
if (!String.IsNullOrEmpty(Request.QueryString["showthanks"])
&&
!String.IsNullOrEmpty(Request.QueryString["emailto"])
)
{
//Register JavaScript to show thanks. The redirect JavaScript is in
//Page2.aspx

ClientScript.RegisterStartupScript(GetType(), "OK!",
String.Format("alert('Thank you. Your request has been submitted to
{0}');",
EmailTo.Replace("'", "\'")), true);


}
}


Regards,
Allen Chen
Microsoft Online Support