asp.net stop button event running on Refresh

问题

I have a button that has click event in my C#. This works great. However afetr pressing F5 to refresh the page I noticed the button event is fired. This occurs every time I click F5. I've added if(page.IsPostBack) and the method still runs.

Is there any way to stop this method from firing when the F5 Refresh button is clicked?

Thanks!

http://pastebin.com/9ycNraaT

回答1:

If you have a page that needs to be run once, you should implement logic in your code that prevents the same method from running multiple times. In pseudo-code:

if (canExecuteMethod()) {
    executeMethod();
} else {
    displayMessageThatMethodCannotBeExecuted();
}

For example, you can check a Session variable with canExecuteMethod(), which returns false when it is not present and is set in executeMethod():

function canExecuteMethod() {
     return Session["methodIsExecuting"] == null 
         || Session["methodIsExecuting"] == false;
}

function executeMethod() {
    Session["methodIsExecuting"] = true;
    // ...
}

Of course the use of a Session variable has it limits, so you might want to consider using a database or AppSettings variable instead.

回答2:

try to use Response.Redirect("Your page ") after the your add/update code. it isn't good practice, but it will help you.

回答3:

if(!page.IsPostBack)

NOT if(page.IsPostBack)

回答4:

No way. If once you click button (and post data) after refresh the same data will be sended.

来源：https://stackoverflow.com/questions/5484000/asp-net-stop-button-event-running-on-refresh