Web Forms :: Avoid Duplicate When User Hit Refresh Button?

Feb 16, 2010

I have a receipt page for my clients that will display their info and they will get notify by an email message. Here is the problem: when user hit refresh button from a brownser, it will send duplicate email message to the user.

This is what i have:

void Page_Load(object sender,
EventArgs e)
{ if(!IsPostBack)
protected void SendEmail()
{ //here is my function for email

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[Code] ....

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